【新文速递】2024年1月13日复合材料SCI期刊最新文章

今日更新：Composite Structures 1 篇，Composites Part A: Applied Science and Manufacturing 2 篇，Composites Part B: Engineering 9 篇，Composites Science and Technology 4 篇Composite StructuresMicromechanism-based Magneto-thermomechanical Properties of Magnetic Particles Filled Shape Memory Polymer CompositeLi Zhang, Kun Jiang, Ran Tao, Yiqi Mao, Shujuan Houdoi:10.1016/j.compstruct.2023.117837磁性颗粒填充形状记忆聚合物复合材料的微力学磁热性能研究Magnetic nanoparticles-filled shape memory polymer composite (MSMPC) possesses excellent magnetothermal property, showing wide prospects for engineering applications. The thermo-magnetically triggered shape memory (SM) process contains complex multi-physical mechanisms, especially when coupled with finite deformation rooted on micro-mechanisms. A multi-physicals finite deformation model is necessary to get a deep understanding on the coupled magneto-thermo-mechanical properties of MSMPC, beneficial to its design and wide application. Taking into consideration of micro-physical mechanisms of the nanoparticles interacting with chain network, a finite deformation theoretical model is developed in this work based on two superimposed networks of a crosslinked network formed between magnetic particles (PP network) and another crosslinked network of polymer chains (CC network). The intact CC network is considered featuring with entropic-hyperelastic properties, superimposed with a PP network where effects of particle size and chain distribution between particle-pairs are considered. The model is calibrated by a series of experiments and is further used to investigate multiply (magnetically and thermally) triggered shape recoveries by directly heating and magnetic-heating due to Neel and Brown relaxation. Numerical examples assess the effects of nanoparticle concentration and size, magnetic field strength, loading strain rate and phase evolution on SM behavior. This model demonstrates good feasibility in capturing the coupled magneto-thermo-mechanical behavior of MSMPC and provides theoretical understandings and design guidelines for MSMPC.磁性纳米颗粒填充形状记忆聚合物复合材料(MSMPC)具有优异的磁热性能，具有广阔的工程应用前景。热磁触发形状记忆(SM)过程包含复杂的多物理机制，特别是当其与基于微观机制的有限变形耦合时。为了深入理解MSMPC的磁-热-力耦合性能，需要建立多物理场有限变形模型，这有利于MSMPC的设计和广泛应用。考虑到纳米颗粒与链网相互作用的微观物理机制，本文建立了基于磁性颗粒之间形成的交联网络(PP网络)和聚合物链之间形成的交联网络(CC网络)的两个叠加网络的有限变形理论模型。完整的CC网络被认为具有熵-超弹性特性，并与PP网络叠加，其中考虑了颗粒大小和颗粒对之间链分布的影响。该模型通过一系列实验进行校准，并进一步用于研究由直接加热和由尼尔和布朗弛豫引起的磁加热多重(磁和热)触发的形状恢复。数值算例评估了纳米颗粒浓度和尺寸、磁场强度、加载应变率和相演化对SM行为的影响。该模型在捕获MSMPC的磁-热-力耦合行为方面具有良好的可行性，为MSMPC的设计提供了理论依据和指导。Composites Part A: Applied Science and ManufacturingRecycling of wet carbon fiber-reinforced plastic laminates by thermal decomposition coupled with electrical treatmentShinya Matsuda, Saki Koyano, Kazumasa Oshimadoi:10.1016/j.compositesa.2023.107991热分解与电处理相结合的湿碳纤维增强塑料层压板的回收The use of carbon fiber-reinforced plastics (CFRPs) produces moisture-absorbing CFRP waste, which is usually recycled via thermal decomposition treatment (TDT). However, the oxygen gas generated during heating can hardly penetrate dense CFRPs, resulting in nonuniform damage to the recovered carbon fibers (rCFs) collected from the outer (oCFs) and inner (iCFs) parts of CFRP waste. Herein, TDT was coupled with electrical treatment (ET) to improve the recycling performance of CFRP laminates waste. The tensile strength of the rCFs measured via the single-fiber tensile tests was analyzed using a two-parameter Weibull distribution. Absorbed water was preferentially evaporated from the laminates by Joule heating during ET, resulting in extensive pore formation. Following TDT, the oCFs and iCFs showed nearly identical average tensile strengths because the pores formed by ET served as efficient diffusion pathways for oxygen gas. The proposed recycling technology may potentially be applied to other types of moisture-absorption waste.碳纤维增强塑料(CFRP)的使用产生吸湿的CFRP废料，通常通过热分解处理(TDT)回收。然而，加热过程中产生的氧气很难穿透致密的CFRP，导致从CFRP废料的外层(oCFs)和内部(iCFs)收集的回收碳纤维(rfc)受到不均匀的损伤。本文将TDT与电处理(ET)相结合，以提高CFRP复合材料废弃物的回收性能。采用双参数威布尔分布对单纤维拉伸试验测得的rcf拉伸强度进行了分析。吸收的水分在ET过程中通过焦耳加热优先从层压板中蒸发，导致广泛的孔隙形成。在TDT之后，oCFs和iCFs表现出几乎相同的平均抗拉强度，因为ET形成的孔隙是氧气的有效扩散途径。建议的回收技术可能应用于其他类型的吸湿性废物。Ballistic performance of bio-inspired hybrid interleaved composite structures suitable for aerospace applicationsM.Erfan Kazemi, Victor Medeau, Yanhong Chen, Ziwen Xu, Nik Petrinic, Emile Greenhalgh, Paul Robinson, James Finlayson, Silvestre T. Pinhodoi:10.1016/j.compositesa.2023.107992适用于航空航天应用的仿生混合交织复合材料结构的弹道性能We investigate the ballistic performance of an aircraft engine containment casing demonstrator, made of composite materials with a novel bio-inspired hybrid interleaved design, under high-velocity impact (HVI) at a specific angle. Firstly, we apply a bio-inspired (BI) helicoidal design to develop a large-scale monolithic laminate concept made of carbon fibre-reinforced polymer (CFRP). Then, we hybridise the developed BI laminate concept with interleaved blocks of Zylon fibre (PBO)-reinforced polymer to develop a large-scale BI hybrid interleaved laminate concept. We then further hybridise the developed BI hybrid concept with titanium (Ti) foils (located at the impact face) so that in total we have three large-scale laminate concepts. We manufacture 6 large-scale laminates from each concept with dimensions of 225 × 225 mm and a target areal weight of 0.95 g/cm2. We then test them (perpendicularly) under HVI ranging from 150 to 300 m/s to obtain the ballistic limit and energy dissipation. Secondly, after selecting the best-performing developed laminate concept, we scale it up to develop industrial demonstrator panels with a target areal weight of 1.5 g/cm2 and dimensions of 550 × 360 mm. We test the panels under HVI at an angle of 55° with a larger and heavier projectile, to more closely represent a fan blade-off event onto the engine casing. The results of the large-scale laminate concept tests show that the BI hybrid interleaved CFRP/PBO concept outperformed the rest of the concepts with 54% and 34% improvement in energy dissipation compared to that of quasi-isotropic (QI) and the BI monolithic CFRP, respectively. Our results show that small-scale designs for HVI-resistant CFRP-based laminates cannot be simply assumed to exhibit an equivalent performance for industrial applications with thicker laminates, heavier projectiles and impacts at an angle.研究了某型飞机发动机安全壳演示体在特定角度高速撞击(HVI)下的弹道性能，该演示体由新型仿生混合交错设计的复合材料制成。首先，我们采用生物启发(BI)螺旋设计来开发由碳纤维增强聚合物(CFRP)制成的大型整体层压板概念。然后，我们将开发的BI层压板概念与交织块的Zylon纤维(PBO)增强聚合物混合，以开发大规模的BI混合交织层压板概念。然后，我们进一步将开发的BI混合概念与钛(Ti)箔(位于撞击面)混合在一起，这样我们总共有三个大型层压板概念。我们从每个概念中制造6个大型层压板，尺寸为225 × 225毫米，目标面积重量为0.95 g/cm2。然后我们在150到300米/秒的HVI范围内(垂直)测试它们，以获得弹道极限和能量耗散。其次，在选择了性能最好的层压板概念后，我们将其扩展到目标面积重量为1.5 g/cm2，尺寸为550 × 360 mm的工业示范板。我们用一个更大更重的弹丸以55°的角度测试了HVI下的面板，以更接近地代表风扇叶片脱落到发动机外壳上的事件。大型层压板概念试验结果表明，与准各向同性(QI)和BI单片CFRP相比，BI混合交织CFRP/PBO概念的能耗分别提高了54%和34%，优于其他概念。我们的研究结果表明，抗hvi的cfrp层压板的小规模设计不能简单地假设在更厚的层压板、更重的弹丸和一定角度的冲击下表现出与工业应用相同的性能。Composites Part B: EngineeringA small-diameter vascular graft promotes rapid and benign remodeling of the neointima through dual release of nitric oxide and hydrogen sulfideFubang Liang, Dawei Jin, Lijuan Wang, Jingyi Zhang, Pengfei Li, Jiang Yuan, Yanjun Pan, Meng Yindoi:10.1016/j.compositesb.2023.111172小直径血管移植物通过一氧化氮和硫化氢的双重释放促进新生内膜的快速和良性重塑Coronary artery bypass grafting often requires autologous veins as alternatives. The limited source and problem of over-expansion are major obstacles for vein grafts, which could be solved by small-diameter artificial vascular graft. However, their clinical application is limited by thrombosis and restenosis caused by incomplete endothelialization and abnormal smooth muscle cells (SMCs) proliferation. Nitric oxide (NO) and hydrogen sulfide (H2S) are crucial signaling molecules in the cardiovascular system, known to regulate endothelial cells(ECs) and SMCs proliferation, migration, reduce oxidative stress, and inhibit inflammation to prevent intimal hyperplasia. In this study, we developed a new method to prepare a keratin based H2S donor(KAT) complexed with copper ions and electrospun it with PCL to prepare PCL/KAT-Cu small-diameter tissue-engineered vascular graft, which is capable of dual release of NO and H2S. We investigated the effects of NO and H2S release on human umbilical vein endothelial cells (HUVECs) and human umbilical arterial smooth muscle cells(HUASMCs) proliferation and migration, evaluated the graft's selectivity for HUVECs, and assessed its effects on macrophage phenotypic transitions and its protective effect on HUVECs under reactive oxygen species (ROS) conditions. Additionally, we tested the graft's ability to rapidly endothelialize under shear force using an in vitro 3D-perfusion system. After one month of in situ transplantation in rat abdominal aorta, the PCL/KAT-Cu small-diameter tissue-engineered vascular grafts demonstrated satisfactory intimal remodeling, comparable to natural blood vessels. In conclusion, our study presents a promising new strategy for remodeling small-diameter vascular grafts.冠状动脉旁路移植术通常需要自体静脉作为替代。血管来源有限和血管过度扩张是静脉移植的主要障碍，小直径人工血管移植可以解决这一问题。然而，由于内皮化不完全和平滑肌细胞(SMCs)增殖异常导致血栓形成和再狭窄，限制了其临床应用。一氧化氮(NO)和硫化氢(H2S)是心血管系统中至关重要的信号分子，可以调节内皮细胞(ECs)和SMCs的增殖、迁移、减少氧化应激、抑制炎症以防止内膜增生。在本研究中，我们开发了一种新的方法，制备基于角蛋白的H2S供体(KAT)与铜离子络合，并与PCL静电纺，制备PCL/KAT- cu小直径组织工程血管移植物，能够双重释放NO和H2S。我们研究了NO和H2S释放对人脐静脉内皮细胞(HUVECs)和人脐动脉平滑肌细胞(HUASMCs)增殖和迁移的影响，评估了移植物对HUVECs的选择性，并评估了其对巨噬细胞表型转变的影响及其在活性氧(ROS)条件下对HUVECs的保护作用。此外，我们使用体外3d灌注系统测试了移植物在剪切力下快速内皮化的能力。在大鼠腹主动脉原位移植1个月后，PCL/KAT-Cu小直径组织工程血管移植物表现出满意的内膜重塑，与天然血管相当。总之，我们的研究为重建小直径血管移植物提供了一个有希望的新策略。Core-shell structured tow-pregs enabled additive manufacturing of continuously reinforced thermoset compositesKaiyue Deng, Soyeon Park, Chunyan Zhang, Ying Peng, Amit Chadhauri, Kun (Kelvin) Fudoi:10.1016/j.compositesb.2023.111179核壳结构的双胎使连续增强热固性复合材料的增材制造成为可能One of the major challenges in thermally curable polymer composite additive manufacturing is the slow curing time of thermally curable resins, coupled with a significant drop in thermoset viscosity upon heating, making the formation of complex shapes difficult. To tackle these issues, we have introduced a novel rapid composite preformation strategy called Tow-Preg Cladding (TPC). This technique involves the use of a thin and rapidly curable dual-cure resin, which combines a thermally curable resin (such as epoxy) with a fast photo-curable resin. The dual-cure resin is applied as a coating over a thermally curable resin tow-preg, enabling the formation of a rigid cladding that supports and shapes the tow-pregs into the desired geometries and patterns. The key advantage of this approach lies in the sequential formation of an interpenetrating polymer network (IPN) at the interlayer between laminates, resulting from the curing of the photocurable resin and the thermally curable resin sequentially. This IPN formation enhances interlaminar bonding in the composite, contributing to its overall strength and performance. The composites produced using this technique exhibited impressive mechanical properties, including longitudinal tensile strength of 1058.2 MPa, longitudinal tensile modulus of 74.2 GPa, flexural strength of 1080.4 MPa, and flexural modulus of 41.7 GPa. Overall, our Tow-Preg Cladding approach shows great promise in overcoming the challenges associated with thermally curable polymer composite additive manufacturing. It offers a viable solution to creating strong, shape-specific thermoset composites efficiently with enhanced mechanical properties.热固化聚合物复合材料增材制造的主要挑战之一是热固化树脂的固化时间慢，加上加热时热固性粘度的显著下降，使得复杂形状的形成变得困难。为了解决这些问题，我们引入了一种新的快速复合材料预成型策略，称为Tow-Preg包覆(TPC)。该技术涉及使用薄且可快速固化的双固化树脂，该树脂将热固化树脂(如环氧树脂)与快速光固化树脂结合在一起。双固化树脂作为涂层涂在热固化树脂拖坯上，形成刚性包层，支撑拖坯并使其形成所需的几何形状和图案。这种方法的主要优点在于，在层叠板之间的中间层上，光固化树脂和热固化树脂依次固化，从而形成互穿聚合物网络(IPN)。这种IPN的形成增强了复合材料的层间键合，有助于提高其整体强度和性能。该复合材料的纵向拉伸强度为1058.2 MPa，纵向拉伸模量为74.2 GPa，弯曲强度为1080.4 MPa，弯曲模量为41.7 GPa。总的来说，我们的Tow-Preg覆层方法在克服与热固化聚合物复合材料增材制造相关的挑战方面显示出巨大的希望。它提供了一种可行的解决方案，可以有效地制造出具有增强机械性能的坚固、形状特定的热固性复合材料。Beyond graphene and boron nitride: why MXene can be used in composite for corrosion protection on metals?Huaijie Caodoi:10.1016/j.compositesb.2023.111168超越石墨烯和氮化硼:为什么MXene可以用于金属的防腐复合材料?Corrosion of metals leads to huge economic loss and safety hazard in daily life and industrial production. Integration between two-dimensional (2D) MXene and polymer composite coating opens up great opportunities for multifunctional applications of MXene-based coatings, especially in corrosion protection. Similar to other 2D materials (graphene and boron nitride), the appealing features in physical structure and chemical properties endow the MXene with great potential for anti-corrosion. However, the oxidation and poor stability of MXene limit the application. Meanwhile, the differences from graphene and boron nitride are not clear. Therefore, the question why MXene can be used for surface protection and the differences from graphene and boron nitride are confusing for researchers. Unfortunately, there lacks a comprehensive review of this topic. In this review, the intrinsic surface protection ability of MXene is presented. Meanwhile, the characteristics of MXene beyond graphene and boron nitride, as well as the advantages of MXene for application in corrosion protection are analyzed. Furthermore, the recent progress of experimental results and theoretical calculations are summarized to explore the roles of MXene in corrosion protection. Finally, the challenges and perspectives of MXene-based anti-corrosion coatings are put forward. This review aims to provide guidance for designing and expanding the application of high-performance MXene-based anti-corrosion coatings.金属腐蚀在日常生活和工业生产中造成巨大的经济损失和安全隐患。二维(2D) MXene与聚合物复合涂层之间的集成为MXene基涂层的多功能应用，特别是在防腐方面开辟了巨大的机会。与其他二维材料(石墨烯和氮化硼)类似，MXene在物理结构和化学性质上的吸引人的特征赋予了它巨大的防腐潜力。但MXene的氧化性和稳定性差限制了其应用。与此同时，石墨烯和氮化硼的区别还不清楚。因此，为什么MXene可以用于表面保护，以及它与石墨烯和氮化硼的区别让研究人员感到困惑。不幸的是，缺乏对这一主题的全面审查。本文综述了MXene固有的表面保护能力。同时，分析了MXene在石墨烯和氮化硼之外的特性，以及MXene在防腐方面的应用优势。在此基础上，总结了近年来实验结果和理论计算的进展，探讨了MXene在防腐中的作用。最后，提出了mxene基防腐涂料面临的挑战和发展前景。本文综述旨在为高性能mxene基防腐涂料的设计和推广应用提供指导。Surface-grafting modification of attapulgite nanorods with polysiloxane coupling agents for highly-efficient mechanical and triboelectric performance enhancement of silicone rubbersLiqiong Xia, Jiqing Zeng, Yalan Xiao, Jianliang Gong, Yiwang Chendoi:10.1016/j.compositesb.2023.111170 聚硅氧烷偶联剂对凹凸棒石纳米棒进行表面接枝改性，以高效增强硅橡胶的机械和摩擦电性能The quest for polymeric materials that combine mechanical robustness with high triboelectric charge density is paramount in a novel kind of triboelectric nanogenerators (TENGs) that can directly convert mechanical energy into electricity in a clean and green way. Silicone rubbers (SRs) are one of the most frequently-used triboelectric materials owing to their excellent processability and high tendency of being negatively charged via contact electrification (CE), but their potential can be further maximized by strategic doping with nanomaterials. Herein, we introduced a novel kind of naturally occurring clay mineral attapulgite nanorods with surfaces modified by elaborately-synthesized polysiloxane coupling agents (PCA@ATP) to elevate the mechanical and triboelectric performance of silicone rubbers (SRs) efficiently. The modified SRs not only amplified the tensile strength by over 21 % with the addition of only 4 phr PCA@ATP, but also possessed a significant increase by 40.11 % in triboelectric charge density (ρ(Q)). Moreover, the ρ(Q) of modified SR films showed a continuously increasing trend with a further increase of PCA@ATP content. Particularly, SR films doped with 8 phr PCA@ATP showcased a ρ(Q) enhancement by 59 %, rendering them as exceptional candidates for TENGs. Through rigorous experimentation, we observed that increasing the impact frequency and PCA@ATP content consistently enhanced both the output voltage and current of the SR-based TENGs. In comparison to undoped SR films, doping with 4 phr and 8 phr PCA@ATP resulted in an impressive 122 % and 146.68 % boost in voltage and a 393 % and 508.53 % surge in power, respectively. This highly-efficient mechanical and triboelectric performance enhancement of SRs can be ascribed to the homogeneous incorporation of 1D inorganic nanomaterials PCA@ATPs with high Young's modulus, dielectric constant, and topologically-reinforced interface, leading to a comprehensive improvement of mechanical energy transfer, conversion, storage, and dissipation efficiency. This study presents a pioneering strategy for crafting robust triboelectric materials with superior CE performance, paving the way for more effective mechanical energy harvesting.对于一种新型摩擦电纳米发电机(teng)来说，寻求将机械坚固性与高摩擦电荷密度结合在一起的聚合物材料是至关重要的，这种新型摩擦电纳米发电机可以以清洁和绿色的方式直接将机械能转化为电能。硅橡胶(SRs)由于其优异的可加工性和高负电荷倾向而成为最常用的摩擦电材料之一，但通过纳米材料的战略性掺杂可以进一步发挥其潜力。本文介绍了一种新型的天然粘土矿物凹凸棒石纳米棒，其表面经过精心合成的聚硅氧烷偶联剂修饰(PCA@ATP)，以有效提高硅橡胶(SRs)的机械和摩擦电性能。仅添加4个phr PCA@ATP，改性后的SRs不仅拉伸强度提高了21 %以上，摩擦电荷密度(ρ(Q))也显著提高了40.11 %。随着PCA@ATP含量的进一步增加，改性SR膜的ρ(Q)呈不断增加的趋势。特别是，掺入8 phr PCA@ATP的SR薄膜的ρ(Q)增强了59 %，使其成为teng的特殊候选者。通过严格的实验，我们观察到增加冲击频率和PCA@ATP含量可以持续提高基于sr的teng的输出电压和电流。与未掺杂的SR膜相比，掺杂4 phr和8 phr PCA@ATP的SR膜的电压分别提高了122 %和146.68 %，功率分别提高了393 %和508.53 %。这种高效的机械和摩擦电性能增强可以归因于一维无机纳米材料PCA@ATPs的均匀掺入，这些材料具有高杨氏模量、介电常数和拓扑增强界面，从而全面提高了机械能的传递、转换、存储和耗散效率。这项研究提出了一种具有卓越CE性能的坚固摩擦电材料的开创性策略，为更有效的机械能收集铺平了道路。Unleashing excellent antibacterial performance of natural rubber composites via herbal extractsXi Chen, Kun Zhang, Jia Heng Liang, Linxin You, Tian Qiu, Yen Weidoi:10.1016/j.compositesb.2023.111171 通过草药提取物释放天然橡胶复合材料优异的抗菌性能Natural rubber latex (NRL)-based products often suffer from poor antibacterial performance, which limits their applications. Here, we fabricate NRL-based materials with enhanced antibacterial properties by incorporating natural plant extracts. Chinese herbal extracts/NRL compounds are prepared by compounding the relevant antibacterial natural plant extracts with the NRL, and the resulting mechanical properties and thermal stability are investigated. Mugwort/NRL and honeysuckle/NRL show the best antimicrobial effect, destroying the cell structure of various bacteria; no complete bacterial cells were found in the antimicrobial area. The excellent antibacterial properties，good cell compatibility and well-retained mechanical performance of the fabricated materials validate the proposed method as a novel, easy approach to preparing antibacterial NRL products. When the content of Chinese herbal extracts was 7.5wt%, the Chinese herbal extracts/NR composites exhibited the best antibacterial and comprehensive mechanical properties. These products can be used in medical applications such as condoms, medical gloves, medical catheters and broaden the application of traditional Chinese herbal medicine. More importantly, the “template method” is proposed to rapidly determine the antibacterial ability of composite latex. This method can be applied to further scientific research and facilitate industrial production, providing strong technical support for developing more antibacterial latex products.以天然胶乳(NRL)为基础的产品通常具有较差的抗菌性能，这限制了它们的应用。在这里，我们通过加入天然植物提取物来制造具有增强抗菌性能的nrl基材料。将相关抗菌天然植物提取物与NRL复配制备中草药提取物/NRL化合物，并对其力学性能和热稳定性进行了研究。艾草/NRL和金银花/NRL的抑菌效果最好，能破坏多种细菌的细胞结构;抗菌区未发现完整的细菌细胞。制备的材料具有优异的抗菌性能、良好的细胞相容性和良好的机械性能，证明该方法是制备抗菌NRL产品的一种新颖、简便的方法。当中草药提取物含量为7.5wt%时，中草药提取物/NR复合材料的抗菌性能和综合力学性能最好。这些产品可用于避孕套、医用手套、医用导管等医疗应用，拓宽了中药的应用领域。更重要的是，提出了快速测定复合胶乳抗菌能力的“模板法”。该方法可应用于进一步的科学研究，便于工业化生产，为开发更多抗菌乳胶产品提供有力的技术支持。Electron transition enhanced in-situ co-reduction mechanism enabling high-capacity and stable lithium storage for MoO3-x anodeXueyang Hou, Haofei Du, Minghao Song, Miao Ruan, Fan Cheng, Fang Song, Jianchun Wu, Kexin Zhao, Zhao Fang, Xuefeng Zhang, Keyu Xiedoi:10.1016/j.compositesb.2023.111174电子跃迁增强了原位共还原机制，实现了MoO3-x阳极高容量和稳定的锂存储Transition metal oxides (TMOs) often achieve excellent performance through micro-scale regulation and structural evolution, especially as electrode materials for lithium-ion batteries (LIBs). Recently, in order to improve the inferior rate capability, sluggish reaction kinetics, and fast capacity decay of transition metal oxide MoO3 during a long-term charge/discharge process, a variety of composite materials and synthetic routes have been developed. However, the expensive multi-step synthesis, weak interaction between composites, and poor intrinsic conductivity of MoO3 severely hinder the large-scale commercial application of composites. Therefore, a simple, green and low-cost electron transition enhanced one-step co-reduction strategy is proposed to synthesize a novel MoO3-x nanoparticle/few-layer reduced graphene oxide (rGO) composite (denoted as MNR) with strong terminal-bonding (MoO2–O–C-rGO). The strategy ingeniously realizes the fabrication of oxygen vacancies (MoO3-x) and the in-situ reduction of graphene oxide (GO), as well as accomplish the dual regulation of scale and structure by forming a strong terminal-bonding effect. Significantly, the obtained MNR anode exhibits an ultrahigh discharge capacity (1415 mA h g−1 at 1.0 A g−1) and long cycle stability (95 % capacity retention after 700 cycles), which is superior to the previously reported MoO3-based composites. Moreover, the full battery coupled with LiFePO4 cathode also reveals a competitive energy density (369 Wh kg−1). The results suggest a novel approach for the fabrication and wide application of TMOs/rGO composites.过渡金属氧化物(TMOs)通常通过微尺度调控和结构演变获得优异的性能，特别是作为锂离子电池(LIBs)的电极材料。近年来，为了改善过渡金属氧化物MoO3在长期充放电过程中速率性能差、反应动力学迟钝、容量衰减快等问题，开发了多种复合材料和合成路线。然而，MoO3合成成本高、复合材料间相互作用弱、本征电导率差等问题严重阻碍了复合材料的大规模商业化应用。因此，我们提出了一种简单、绿色、低成本的电子跃迁增强一步共还原策略来合成一种新型的具有强端键的MoO3-x纳米颗粒/少层还原氧化石墨烯(rGO)复合材料(MoO2-O-C-rGO)。该策略巧妙地实现了氧空位(MoO3-x)的制备和氧化石墨烯(GO)的原位还原，并通过形成强大的端键效应实现了尺度和结构的双重调控。值得注意的是，所获得的MNR阳极具有超高的放电容量(在1.0 A g−1时为1415 mA h g−1)和长循环稳定性(700次循环后容量保持率为95 %)，优于先前报道的moo3基复合材料。此外，与LiFePO4阴极耦合的全电池也显示出具有竞争力的能量密度(369 Wh kg−1)。研究结果为TMOs/rGO复合材料的制备和广泛应用提供了一条新的途径。Selective transfer of mini-light-emitting diodes via the laser-induced switching of adhesives based on azobenzene compositesTae-Hyung Lee, Jong-Ho Back, Jae-Seung Lim, Gi-Yeon Han, Mo-Beom Yi, Youngdo Kim, Jae-Hak Lee, Seungman Kim, Hyun-Joong Kimdoi:10.1016/j.compositesb.2023.111175 基于偶氮苯复合材料的胶粘剂激光诱导开关的微型发光二极管的选择性转移Switchable adhesives are adhesives that exhibit robust bonding properties under normal conditions but on the application of specific stimuli, exhibit easy detachability. Of particular interest is their applications in mini/micro-light-emitting diodes (LEDs). However, previous research has focused primarily on the engineering aspect of the transfer processes of these LEDs rather than on the development of switchable adhesive materials. This study presents a novel approach for the development of laser-induced switchable adhesives based on azobenzene composites by incorporating a urethane-modified azobenzene compound and a UV absorber into the adhesive. This approach results in an enhanced adhesion-switching performance and a reduction in laser-induced surface deformation. Furthermore, we investigate the relationship between the adhesion activation behavior and laser exposure conditions to identify the optimal exposure conditions for the laser-induced selective transfer of mini-LEDs. Our findings suggest that azobenzene-composite-based switchable adhesives have significant potential for expanding the material scope of laser-induced adhesion switching and broadening the application field of azobenzene-based switchable adhesives.可切换粘合剂是在正常条件下表现出坚固粘合性能的粘合剂，但在特定刺 激的应用中，表现出易于拆卸的特性。特别令人感兴趣的是它们在微型/微型发光二极管(led)中的应用。然而，以前的研究主要集中在这些led转移过程的工程方面，而不是可切换粘合剂材料的开发。本研究提出了一种基于偶氮苯复合材料的激光诱导可切换粘合剂的新方法，该方法将一种聚氨酯改性偶氮苯化合物和一种紫外线吸收剂掺入粘合剂中。这种方法增强了粘附切换性能，减少了激光引起的表面变形。此外，我们研究了粘附激活行为与激光暴露条件之间的关系，以确定激光诱导mini- led选择性转移的最佳暴露条件。研究结果表明，偶氮苯基可切换胶粘剂在扩大激光诱导粘合切换的材料范围和拓宽偶氮苯基可切换胶粘剂的应用领域方面具有重要的潜力。Multifunctional modified polyurethane sponge for recovery of oil spills and photocatalytic degradationShanying Sui, Huafeng Quan, Xiaotian Yang, Xiaohui Dong, Yu Ji, Chuntai Liu, Gang Xu, Shaoqiang Guo, Yi Zhangdoi:10.1016/j.compositesb.2023.111176 用于溢油回收和光催化降解的多功能改性聚氨酯海绵Addressing water pollution issues is directly related to green sustainable development. In this work, a heterostructure polyurethane-based (PU) sponge was prepared by a facile “dip-adhere” strategy to achieve simultaneous and efficient removal of oils and dyes from water. This innovatively designed sponge comprises two functional layers. The hydrophobic/lipophilic octadecylamine-molybdenum disulfide coated PU sponge (ODA-MoS2@PU) layer exhibits excellent sorption capacity, ranging from 38.40 to 63.52 times its own weight, for eight organic solvents (DMSO, isopropanol, n-hexane, petroleum ether, n-butanol, glycol, acetone, xylene) and five oils (soybean oil, olive oil, gasoline, diesel, and lubrication). Furthermore, it exhibits robust stability in extreme environments and maintains a high separation efficiency (99 % after 50 separations). The photocatalytic/superhydrophilic polydopamine-molybdenum disulfide coated PU sponge (PDA-MoS2@PU) layer demonstrates great photocatalytic degradation efficiency for dyes (96.80 % for methylene blue and 97.39 % for methyl orange). Consequently, the heterostructure PU sponge holds application potential in environment remediation.解决水污染问题直接关系到绿色可持续发展。在这项工作中，通过简单的“浸渍-粘附”策略制备了异质结构聚氨酯基(PU)海绵，以实现同时有效地去除水中的油脂和染料。这种创新设计的海绵由两层功能组成。疏水/亲脂性十八烷基胺-二硫化钼包覆PU海绵(ODA-MoS2@PU)层对8种有机溶剂(DMSO、异丙醇、正己烷、石油醚、正丁醇、乙二醇、丙酮、二甲苯)和5种油类(豆油、橄榄油、汽油、柴油和润滑油)具有良好的吸附能力，吸附量为其自重的38.40 ~ 63.52倍。此外，它在极端环境中表现出强大的稳定性，并在50次分离后保持高分离效率(99% %)。光催化/超亲水性聚多巴胺-二硫化钼包覆PU海绵(PDA-MoS2@PU)层对染料的光催化降解效率为96.80 %，对甲基橙的光催化降解效率为97.39 %。因此，异质结构聚氨酯海绵在环境修复中具有应用潜力。A novel approach to manufacturing high-performance reclaimed carbon fiber composites via convergent flow-induced discontinuous fiber align placement (CFi-DFAP)Weihao Liu, Haihong Huang, Kaiyuan Peng, Libin Zhu, Feixiang Jin, Zhifeng Liudoi:10.1016/j.compositesb.2023.111178 聚敛流诱导不连续纤维排列(CFi-DFAP)制造高性能再生碳纤维复合材料的新方法As a low-cost and high-performance composite material, reclaimed carbon fiber (rCF) presents a practical and promising option. However, a challenge remains in controlling the fiber orientation of anisotropic rCF to exploit its outstanding properties fully. This study presents a novel method named Convergent Flow-induced Discontinuous Fiber Aligned Placement (CFi-DFAP) that reformats discontinuous fibers using convergent flow. The CFi-DFAP method enables the alignment and placement of rCF through an extrusion-deposition process. Experimental outcomes demonstrated that compared to random 6 mm-rCF and composites, aligned 6 mm-rCF and its composites exhibited substantial improvements in the preferential alignment degree, mechanical strength, and electrical conductivity. The CFi-DFAP approach paves the way to freely control the discontinuous fibers' orientation and placement position, potentially facilitating the design and manufacturing of high-performance discontinuous fiber composite.再生碳纤维(rCF)作为一种低成本、高性能的复合材料，是一种实用而有前景的选择。然而，如何控制各向异性rCF的取向以充分发挥其优异的性能仍然是一个挑战。本文提出了一种利用会聚流对不连续纤维进行重新排列的新方法——会聚流诱导不连续纤维排列放置(CFi-DFAP)。CFi-DFAP方法通过挤压-沉积工艺实现rCF的对准和放置。实验结果表明，与随机的6 mm-rCF及其复合材料相比，排列的6 mm-rCF及其复合材料在优先排列度、机械强度和电导率方面都有显著提高。CFi-DFAP方法为自由控制不连续纤维的取向和放置位置铺平了道路，为高性能不连续纤维复合材料的设计和制造提供了潜在的便利。Composites Science and TechnologySynergistic interfacial effects of sizing agent containing gradient curing agent and pre-heating treated carbon fibersQing Wu, Hao Deng, Yating Li, Aijun Gao, Bolin Xiao, Renjie Yao, Jianfeng Zhudoi:10.1016/j.compscitech.2023.110415 含梯度固化剂的施胶剂与预处理碳纤维的协同界面效应This investigation focuses on the use of sizing agent containing gradient curing agent from two directions for carbon fibers coupled with pre-heating treatment before fibers combined into composites to improve interfacial adhesion. Growth in interfacial shear strength (IFSS) up to 92.4 % was noticed for fibers functionalized with sizing agent of high-to-low curing agent from fiber-to-resin (CFH→L), relative to control fibers. This is related to the greatly enhanced interactions at both fiber/sizing and sizing/resin interfaces accompanied by increased interfacial curing degree that generate a stronger interphase. Further optimization of 4.1 % increase in IFSS was achieved for CFH→L via pre-heating treatment before being composites, while larger IFSS increment of 16.7 % after pre-heating treatment was observed for fibers coated with sizing agent of low-to-high curing agent from fiber-to-resin (CFL→H). This reveals that pre-heating is more effective for fiber that has weaker interactions with sizing agent. This work is believed to be a preliminary but crucial trial toward obtaining high-performance fiber composites by simply applying it in the already existed fiber production line.本课题主要研究了在碳纤维复合材料中使用含梯度固化剂的施胶剂，并在纤维复合前进行预热处理，以提高复合材料的界面附着力。从纤维到树脂(CFH→L)，用高到低固化剂的施胶剂改性的纤维界面抗剪强度(IFSS)比对照纤维增长了92.4 %。这与纤维/施胶界面和施胶/树脂界面的相互作用大大增强有关，伴随着界面固化程度的增加，产生了更强的界面相。经复合前预处理，CFH→L纤维的IFSS提高了4.1 %，而从纤维到树脂(CFL→H)涂有从低到高固化剂的施胶剂的纤维经预处理后，IFSS增加了16.7 %。这表明，对于与施胶剂相互作用较弱的纤维，预热效果更好。这项工作被认为是在现有的纤维生产线上简单应用而获得高性能纤维复合材料的初步但至关重要的试验。Revealing the time-dependent electromechanically coupled performances of viscoelastic MWCNT/polyethylene nanocomposite stress sensorsXiaodong Xia, Shijun Zhao, Juanjuan Zhang, Chao Fang, George J. Wengdoi:10.1016/j.compscitech.2023.110417 黏弹性MWCNT/聚乙烯纳米复合应力传感器的时变机电耦合性能研究While highly sensitive elastic strain sensors have been widely investigated, the time-dependent stress sensitivity of viscoelastic MWCNT/polyethylene nanocomposite stress sensors remains to be explored. In this paper, we develop an electromechanically coupled homogenization scheme to reveal the time-dependent stress sensing performances of viscoelastic MWCNT/polyethylene nanocomposite sensors. In the time-dependent context, the complex moduli and electrical conductivity are selected as the dual homogenization parameters. The time-dependent stress sensitivity is illustrated through the viscoelastic imperfect interface connection and stress-induced tunneling distance. The predicted stress sensing capacities of viscoelastic MWCNT/polyethylene nanocomposite stress sensors are shown to be consistent with the experiments under the constant stress loading. It reveals that the stress sensitivity factor increases with the loading time under constant stress. The optimal MWCNT aspect ratio for high sensing capacities exhibits an increasing trend regarding the MWCNT volume fraction. The uncovered sensing characteristics can provide microstructural design guidance in high-performance nanocomposite stress sensors.虽然高灵敏度的弹性应变传感器已经得到了广泛的研究，但粘弹性MWCNT/聚乙烯纳米复合材料应力传感器的应力灵敏度随时间的变化仍有待探索。在本文中，我们开发了一种机电耦合均匀化方案来揭示粘弹性MWCNT/聚乙烯纳米复合材料传感器随时间变化的应力传感性能。在时间相关的情况下，选择复模量和电导率作为双均匀化参数。通过粘弹性不完全界面连接和应力诱导隧道距离来说明应力敏感性随时间的变化。粘弹性MWCNT/聚乙烯纳米复合材料应力传感器在恒定应力载荷下的应力传感能力预测结果与实验结果一致。结果表明，在恒应力条件下，应力敏感系数随加载时间的延长而增大。高传感容量的最佳MWCNT宽高比随MWCNT体积分数的增加呈增加趋势。揭示的传感特性可为高性能纳米复合材料应力传感器的微结构设计提供指导。Design of remoldable, shape-memory, welded biomass composites based on the acetal bond of the cellulose chainTengfei Han, Benzhi Ju, Shufen Zhangdoi:10.1016/j.compscitech.2023.110421 基于纤维素链缩醛键的可重塑、形状记忆、焊接生物质复合材料的设计The growing environmental concern over petrochemical-based plastics continuously promotes the exploration of green and sustainable biomass-based covalent adaptable networks composites (CANs). Compared with petrochemical products, cellulose and its derivatives have overwhelming superiority in terms of availability, cost and biodegradability; nevertheless, CANs using the abundant acetal bonds in the cellulose chain rather than elaborately designing other types of dynamic covalent bonds still have not received sufficient attention. Herein, we report acetal-based cellulose covalent adaptable networks (ACC) synthesized with poly(ethylene glycol) diglycidyl ether as the crosslinker for hydroxypropyl cellulose and tetrabutylammonium bromide (TBAB) as an accelerant. For the first time, exchangeability of the cellulose chain acetal reversible bonds at elevated temperature have been demonstrated to endow ACC reprocessability, shape memory and welding. The TBAB has been used as an accelerant of dynamic exchange for acetal bonds first and its accelerating mechanism and advantages have also been investigated. In addition, the thermal, mechanical and hydrophilic properties of ACC can be adjusted by simply adjusting the raw material ratio and the ACC has excellent chemical and biodegradability. Hence, ACC will provide new ideas for solving white pollution and building new CANs.随着人们对石化基塑料日益增长的环境问题的关注，对绿色可持续的生物质共价适应性网络复合材料(can)的探索不断推进。与石化产品相比，纤维素及其衍生物在可得性、成本和生物降解性方面具有压倒性的优势;然而，利用纤维素链中丰富的缩醛键而不是精心设计其他类型的动态共价键的can仍然没有得到足够的重视。本文报道了以聚乙二醇二甘油酯醚为羟丙基纤维素交联剂，四丁基溴化铵(TBAB)为促进剂合成的乙醛基纤维素共价适应性网络(ACC)。首次证明了纤维素链缩醛可逆键在高温下的可交换性，从而赋予ACC可再加工性、形状记忆性和焊接性。首先将TBAB用作缩醛键动态交换的促进剂，并对其加速机理和优点进行了研究。此外，ACC的热性能、力学性能和亲水性能可以通过简单的调整原料配比来调节，并且ACC具有优异的化学降解性和生物降解性。因此，ACC将为解决白色污染和建造新的can提供新的思路。Polarization Raman spectroscopy characterizations of microscopic stress in 3D angle-interlock woven composites during thermo-oxidative ageingFeng Xu, Jing Long, Yousong Xue, Baozhong Sun, Bohong Gudoi:10.1016/j.compscitech.2023.110423 三维角互锁编织复合材料热氧化老化过程中微观应力的偏振拉曼光谱表征Investigating stress distribution of three-dimensional carbon fiber epoxy woven composites after thermo-oxidative ageing, especially the microscopic stress, is key to safety design of composite materials. Here, polarization Raman spectroscopy combined with the Raman stress sensitivity of carbon fiber was employed to characterize the microscopic stress in the carbon fiber along the warp and weft direction, as well as the microscopic stress mapping in the warp and weft interwoven interfaces. Under thermo-oxidative ageing, the carbon fiber was forced with compressive stress caused by the thermo-oxidative shrinkage of resin. The fitting lines of compressive thermo-oxidative ageing stress (TAS) distribution in the warp and weft were similar to the yarn alignment paths. Meta-regression analysis indicated that the compressive TAS in carbon fibers is positively correlated with ageing time. Furthermore, the correlation between the compressive TAS and ageing time in warp yarns is greater than that in weft yarns. The stress distributed unevenly with the synergistic effect of the structure and ageing time, and interfacial failure was generated where interfacial stresses exceeded the interfacial strength. The interfacial failure further propagated with ageing time, leading to matrix cracking.研究三维碳纤维环氧机织复合材料热氧化老化后的应力分布，特别是细观应力是复合材料安全设计的关键。本文采用极化拉曼光谱结合碳纤维的拉曼应力敏感性，对碳纤维在经纬方向上的微观应力以及经纬交织界面上的微观应力图进行了表征。在热氧化老化过程中，碳纤维受到树脂热氧化收缩引起的压应力的影响。经、纬压缩热氧化老化应力(TAS)分布拟合线与纱线对中路径相似。元回归分析表明，碳纤维压缩TAS与老化时间呈正相关。此外，经纱的压缩TAS与老化时间的相关性大于纬纱。在结构和时效时间的协同作用下，应力分布不均匀，当界面应力超过界面强度时产生界面破坏。随着时效时间的延长，界面破坏进一步扩展，导致基体开裂。来源：复合材料力学仿真Composites FEM