【新文速递】2023年10月15日复合材料SCI期刊最新文章

今日更新：Composite Structures 2 篇，Composites Part A: Applied Science and Manufacturing 5 篇，Composites Part B: Engineering 3 篇，Composites Science and Technology 1 篇Composite StructuresAnalytical study on the behavior of CFRP-concrete bonded joint with a non-rigid end-anchorZhou Hao, Yang Yan, Liu Kai, Huang Tian-li, Ou Ya, Zhang S.S.doi:10.1016/j.compstruct.2023.117609带有非刚性端锚的 CFRP 混凝土粘接接头行为分析研究End-anchors have been widely used to prevent/postpone debonding failures in FRP-strengthened RC structures. The bond behavior between FRP and concrete with end-anchors can be investigated through FRP-concrete bonded joint with such anchors. Existing studies have found that deformation of FRP and the anchor, as well as slip of FRP-concrete interface at the anchored end can happen when the FRP is under external loading; therefore, the simple assumption that end-anchors provide a rigid end to FRP may result in significant overestimations of the bonding stiffness and strength. Against this background, this paper presents an analytical study on the closed-form solution to the full-range bond behavior of CFRP-concrete bonded joint with a non-rigid anchor. The obtained analytical solution was first verified through finite element analyses and test results, and then was adopted in a comprehensive parametric study to investigate the effect of mechanical properties of end-anchors on the overall bond behavior of the joint. This paper provides a better understanding of the bond behavior between FRP and concrete with a non-rigid anchor and shows that the design of such end-anchors should be based on CFRP-concrete interfacial characteristics for a desired bond behavior.端锚已被广泛用于防止/延缓玻璃钢加固 RC 结构的脱粘故障。可以通过带有端锚的 FRP 混凝土粘接接头来研究 FRP 与混凝土之间的粘接行为。现有研究发现，当 FRP 承受外部荷载时，FRP 和锚固件会发生变形，锚固端 FRP 混凝土界面也会发生滑移；因此，简单假定端锚为 FRP 提供刚性端可能会导致对粘结刚度和强度的严重高估。在此背景下，本文对带有非刚性锚固件的 CFRP-混凝土粘接接头的全范围粘接行为的闭式解进行了分析研究。首先通过有限元分析和测试结果验证了所获得的分析解，然后采用该分析解进行了全面的参数研究，探讨了端部锚固件的力学性能对接头整体粘结行为的影响。本文让人们更好地了解了玻璃纤维增强塑料与混凝土之间的非刚性锚固的粘结行为，并表明此类端锚的设计应基于 CFRP-混凝土界面特性，以实现理想的粘结行为。Mechanical properties of a novel hierarchical cellular structure architectured with minimal surfaces and Voronoi-tessellationMu Yanru, Jin Yuan, Ji Han, Wang Weiwei, Zou Sijia, Zhang Chao, Du Jiankedoi:10.1016/j.compstruct.2023.117610用最小表面和 Voronoi 网格构建的新型分层细胞结构的力学特性Hierarchical structures are commonly found in nature due to their combination of low density, exceptional specific properties, and multifunctionality. Inspired by this, we proposed a novel hierarchical cellular structure based on triply periodic minimal surface (TPMS) by connecting two topologically identical and parallel sheets with a series of connecting ribs. A conformal design guideline was provided by describing the mathematical principles behind the generation of such hierarchical cellular structures. Then the designed structures with different configurations were fabricated via laser powder bed fusion (LPBF). Finally, the mechanical performance of the hierarchical cellular structures was analyzed by both experiment and numerical simulation. The dynamic compressive behavior was investigated using a Split Hopkinson pressure bar (SPHB) at a strain rate of 650s-1, and the temperature distribution during tests was monitored using a high-speed infrared camera. As for quasi-static compression tests, it is found that the hierarchical cellular structure had good energy absorption characteristics and relatively low first peak stresses. These results showed that the structure could reduce strain rate hardening effects under dynamic loading, thereby mitigating the increase in first peak stress. The proposed hierarchical cellular structures showed good potential for efficient energy absorption under quasi-static and dynamic compression loadings.由于兼具低密度、特殊性能和多功能性，分层结构在自然界中十分常见。受此启发，我们提出了一种基于三重周期性极小表面（TPMS）的新型分层细胞结构，通过一系列连接肋将两个拓扑相同且平行的薄片连接起来。通过描述生成这种分层蜂窝结构背后的数学原理，我们提供了一个保形设计指南。然后，通过激光粉末熔床（LPBF）制造出不同配置的设计结构。最后，通过实验和数值模拟分析了分层蜂窝结构的机械性能。在应变速率为 650s-1 的条件下，使用分体式霍普金森压力棒（SPHB）研究了动态压缩行为，并使用高速红外摄像机监测了试验过程中的温度分布。在准静态压缩试验中发现，分层蜂窝结构具有良好的能量吸收特性和相对较低的第一峰值应力。这些结果表明，该结构可以降低动态加载下的应变速率硬化效应，从而缓解第一峰值应力的增加。所提出的分层蜂窝结构具有在准静态和动态压缩载荷下高效吸收能量的良好潜力。Composites Part A: Applied Science and ManufacturingTheoretical analysis of phase transition behavior of ALCP/CNT nanocomposites interface by photo and thermal stimulationKim Hongdeok, Choi Joonmyungdoi:10.1016/j.compositesa.2023.107824 光热刺 激下 ALCP/CNT 纳米复合材料界面相变行为的理论分析Azobenzene-containing liquid crystal polymers (ALCPs) functionalised with carbon nanotubes (CNTs) have enormous potential in intelligent devices and soft robotics. This study investigates the phase transition and subcontinuum mechanics occurring at the ALCP/CNT interface under heat and light stimulation using all-atom molecular dynamics (MD) simulations. The results suggest that the strong π-π interaction between azobenzene and CNT directly affects the mechanical behavior due to extremely high interfacial stability. The properties at the interface remain intact even in environments where forced phase transitions are induced by external stimuli. The unique edge-to-face stacking of interfacial azobenzene during isomerization, as well as the co-alignment properties of trans-azobenzene with CNTs in the interfacial region, are the origins of its high stability. The influence of the structural features of the interface on the mechanical behavior during the phase transition is also understood as the load transfer efficiency of each molecular component.与碳纳米管（CNTs）功能化的含偶氮苯液晶聚合物（ALCPs）在智能设备和软机器人领域具有巨大潜力。本研究利用全原子分子动力学（MD）模拟研究了 ALCP/CNT 界面在热和光刺 激下发生的相变和亚连续介质力学。结果表明，由于界面稳定性极高，偶氮苯和 CNT 之间强烈的 π-π 相互作用直接影响了力学行为。即使在外部刺 激诱发强制相变的环境中，界面的特性也能保持不变。界面偶氮苯在异构化过程中独特的边到面堆叠以及反式偶氮苯与 CNT 在界面区的共对准特性是其高稳定性的根源。界面的结构特征对相变过程中机械行为的影响也可以理解为每种分子成分的载荷传递效率。Constructing flame retardant silica nanoparticles through styrene maleic anhydride copolymer grafting for PC/ABS compositesZhang Jingfan, Hua Yifang, Liu Jian, Zhu Tao, Sun Jun, Gu Xiaoyu, Li Hongfei, Zhao Jingmao, Zhang Shengdoi:10.1016/j.compositesa.2023.107825通过苯乙烯-马来酸酐共聚物接枝构建阻燃硅纳米颗粒，用于 PC/ABS 复合材料Organic-inorganic hybrid particles have been prepared by grafting styrene maleic anhydride copolymer (SMA) onto reactive amino-modified silica nanoparticles. The SMA modified SiO2 (SMA-SiO2) was incorporated into polycarbonate (PC)/acrylonitrile-butadiene-styrene (ABS) composites (4:1, wt%/wt%) with bisphenol A bis (diphenyl phosphate) (BDP) to simultaneously improve the mechanical properties and flame retardancy. The mechanical properties of the sample containing SMA-SiO2 are apparently enhanced compared with samples containing unmodified SiO2. It is found that SMA-SiO2 tends to distribute at the phase interface of PC/ABS, and therefore improves the compatibility between PC and ABS. Besides, the peak of heat release rate (PHRR) and the total smoke production (TSP) of the PC/ABS composites are decreased by the presence of SMA-SiO2. It is suggested that SMA-SiO2 can form a flame retarding shell at the phase interface to protect ABS. In general, both the mechanical properties and flame retardancy are enhanced due to the selective distribution.通过将苯乙烯马来酸酐共聚物（SMA）接枝到活性氨基改性二氧化硅纳米粒子上，制备了有机-无机杂化粒子。将 SMA 改性二氧化硅（SMA-SiO2）加入到聚碳酸酯（PC）/丙烯腈-丁二烯-苯乙烯（ABS）复合材料（4:1，wt%/wt%）与双酚 A 双（二苯基磷酸酯）（BDP）中，可同时改善其机械性能和阻燃性。与含有未改性 SiO2 的样品相比，含有 SMA-SiO2 的样品的机械性能明显提高。研究发现，SMA-SiO2 倾向于分布在 PC/ABS 的相界面上，因此提高了 PC 与 ABS 的相容性。此外，SMA-SiO2 的存在降低了 PC/ABS 复合材料的热释放率峰值（PHRR）和总烟雾产生量（TSP）。这表明 SMA-SiO2 可在相界面形成阻燃外壳，保护 ABS。总的来说，由于选择性分布，机械性能和阻燃性都得到了提高。Synthesis of melamine cyanuric based flame retardant via hydrogen bond self-assembly and in-situ dispersion strategies for improving comprehensive performance of epoxy resinWang Wei, Liu Yuan, Wang Qidoi:10.1016/j.compositesa.2023.107826通过氢键自组装和原位分散策略合成三聚氰胺基阻燃剂，提高环氧树脂的综合性能The design of flame retardant epoxy resin (EP) with superior smoke suppression, mechanical properties and simple manufacturing process has been very challenging in industry and academia. Herein, we synthesized an amino-rich polyphosphazonitrile microsphere (PZS) to regulate the synthesis of melamine cyanurate (MCA) through hydrogen bond self-assembly and in-situ dispersion strategies for flame retardant EP. The in-situ dispersion strategy effectively alleviates the agglomeration of PZS@MCA assembly units by taking advantage of the viscosity of EP prepolymer. The hydrogen bond self-assembly strategy provides a strong P/N synergistic effect for MCA. Combined with the in-situ dispersion strategy, adding only 9 wt% PZS@MCA can achieve the UL-94 V-0 rating with a total smoke production (TSP) values of 21.1 m2. Besides, EP/PZS@MCA-I maintains superior mechanical properties due to larger aspect ratio, abundant terminal functional groups and better dispersion of PZS@MCA.在工业界和学术界，设计具有优异抑烟性能、机械性能和简单制造工艺的阻燃环氧树脂（EP）一直是一项非常具有挑战性的工作。在此，我们合成了一种富含氨基的聚磷腈微球（PZS），通过氢键自组装和原位分散策略调节三聚氰胺氰尿酸盐（MCA）的合成，用于阻燃环氧树脂（EP）。原位分散策略利用 EP 预聚物的粘度，有效缓解了 PZS@MCA 组装单元的团聚。氢键自组装策略为 MCA 提供了强大的 P/N 协同效应。结合原位分散策略，只需添加 9 wt% 的 PZS@MCA 即可达到 UL-94 V-0 等级，总产烟量（TSP）值为 21.1 m2。此外，EP/PZS@MCA-I 还具有更大的长径比、丰富的末端官能团和更好的 PZS@MCA 分散性，因此能保持优异的机械性能。Facile engineering strategy to control polymer chain structure for enhanced dispersion, electrical and sensing properties of nanocompositesNa Kim Mi, Lee Hyeseong, Cho Jaehyun, Jun Oh Myung, Hun Kim Seong, Jang Ji-un, Yun Kim Seongdoi:10.1016/j.compositesa.2023.107827 控制聚合物链结构以增强纳米复合材料的分散、电气和传感性能的简便工程策略Preventing the aggregation of nanofillers and inducing uniform filler dispersion are key parameters for improving the electrical conductivity and sensing sensitivity of nanocomposites. Although the viscosity and flow index which are determined by the polymer chain structure can significantly influence the nanofiller dispersion, few systematic structural and physical analyses have been reported. In this study, a facile engineering strategy to control the polymer chain structure was designed and applied using quad-screw extrusion (QSE) capable of transferring high shear stresses. According to the increase in rotation speed of the QSE, low molecular weight polymer chains with relatively uniform chain length were prepared, enabling the fabrication of a nanocomposite with uniform dispersion. Compared to the controls, when the optimized matrix (2000 rpm) was applied to the nanocomposite with 1wt% multi-walled carbon nanotubes, the improved strain sensor sensitivity of 798.3% were achieved owing to the improved filler dispersion and electrical conductivity.防止纳米填料聚集和诱导填料均匀分散是提高纳米复合材料导电性和传感灵敏度的关键参数。虽然由聚合物链结构决定的粘度和流动指数会显著影响纳米填料的分散，但系统的结构和物理分析却鲜有报道。在本研究中，我们设计了一种控制聚合物链结构的简便工程策略，并将其应用于能够传递高剪切应力的四螺杆挤出（QSE）。根据 QSE 旋转速度的增加，制备出链长相对均匀的低分子量聚合物链，从而制造出分散均匀的纳米复合材料。与对照组相比，当将优化基质（2000 rpm）应用于含有 1wt% 多壁碳纳米管的纳米复合材料时，由于填料分散性和导电性得到改善，应变传感器灵敏度提高了 798.3%。Fabrication and Performance of Ultrathin and Adhesive Composite Film with High Out-of-Plane Thermal Conductivity Using 3D Printing and Microwire-cutting AssistanceLv Ruicong, Ren Liucheng, Kang Lei, Niu Resouces Hongyu, Bashir Akbar, Bai Shulindoi:10.1016/j.compositesa.2023.107828利用三维打印和微线切割技术制造具有高平面外导热性的超薄粘合复合膜及其性能This study presents the development of a highly thermally conductive adhesive film based on an epoxy matrix filled with high-oriented graphite films (GFs). The film was fabricated using a 3D-printed framework to fix aligned GFs in a parallel configuration, followed by the infusion of liquid epoxy. A diamond microwire cutting technique was employed to obtain a 0.4 mm thick epoxy composite film. The resulting film exhibits an impressive apparent out-of-plane thermal conductivity of 20 Wm-1K-1 and a notable tensile shear strength of 5.91 MPa, with a GF volume fraction of 75%. Finite element simulations were employed to accurately predict the TC, which is found to be in excellent agreement with experimental results. The unprecedented combination of high out-of-plane TC and adhesive performance in such a thin adhesive film opens up opportunities for its utilization in various thermal management applications, including electronic packaging, LED systems, etc.本研究介绍了一种基于环氧树脂基体的高导热粘合薄膜的开发 情况，该基体中填充了高取向石墨薄膜（GFs）。薄膜的制作采用了三维打印框架，将排列整齐的石墨膜固定在平行配置上，然后注入液态环氧树脂。采用金刚石微线切割技术获得了 0.4 毫米厚的环氧树脂复合薄膜。在 GF 体积分数为 75% 的情况下，生成的薄膜显示出 20 Wm-1K-1 的显著平面外热导率和 5.91 MPa 的显著拉伸剪切强度。我们采用有限元模拟来精确预测薄膜的热导率，结果发现它与实验结果非常吻合。如此薄的粘合剂薄膜前所未有地兼具高平面外热导率和粘合性能，为其在电子封装、LED 系统等各种热管理应用中的应用带来了机遇。Composites Part B: EngineeringDesign, analysis and testing of thermoplastic welded stiffened panels to investigate skin-stringer separation in post-bucklingvan Dooren Kevin, Bisagni Chiaradoi:10.1016/j.compositesb.2023.111033热塑性焊接加劲板的设计、分析和测试，以研究屈曲后的表皮-弦杆分离情况Thermoplastic composite three-stringer panels with omega stiffeners and conduction welded joints are designed, analysed and tested until final failure to investigate the performance of the welded joint in post-buckling. The three-stringer panels are designed to be structurally representative of the fuselage demonstrator of the Clean Sky 2 project STUNNING. A simplified model of the fuselage keel section is analysed by finite element analysis, using the virtual crack closure technique to model skin-stringer separation of the welded joint. The post-buckling and skin-stringer separation behaviour of the fuselage section is then adopted as the reference for the design of the three-stringer panels. Two panels are then tested. The test setup utilises digital image correlation to measure the deformation of the panels, and a high-speed camera to capture the final failure mode. The panels failed in post-buckling due to the separation of the middle stringer, with unstable separation growth followed by separation of the outer stringers and then stringer fracture. The numerical analysis of the panels, with geometrical imperfections included, is able to predict the structural behaviour accurately, with only minor differences in buckling shape and separation behaviour.对带有欧米茄加强筋和传导焊接接头的热塑性复合材料三弦板进行了设计、分析和测试，直至最终失效，以研究焊接接头在后弯曲中的性能。三弦板的设计在结构上代表了 "洁净天空 2 号 "项目 "STUNNING "的机身验证机。对机身龙骨部分的简化模型进行了有限元分析，使用虚拟裂缝闭合技术对焊接接头的蒙皮-弦杆分离进行建模。然后将机身部分的后屈曲和蒙皮-弦杆分离行为作为三弦杆面板设计的参考。然后对两块面板进行测试。测试装置利用数字图像相关技术测量面板的变形，并利用高速摄像机捕捉最终的失效模式。面板在后屈曲过程中因中间弦杆分离而失效，分离增长不稳定，随后外弦杆分离，然后弦杆断裂。对包含几何缺陷的面板进行的数值分析能够准确预测结构行为，仅在屈曲形状和分离行为方面存在细微差别。Lightweight, strong, and thermally insulating polybenzoxazine aerogel thermal protection composites for antioxidant ablation long to 1800 sXiao Yunyun, Liu Saihui, Zhou Jinlong, Zhang Sizhao, Li Zhenquan, Xiong Shixian, Li Liangjun, Feng Jiandoi:10.1016/j.compositesb.2023.111045重量轻、强度高、隔热性能好的聚苯并恶嗪气凝胶热保护复合材料，可用于长达 1800 秒的抗氧化烧蚀The lightweight ablation materials that have been successfully applied in thermal protection systems (TPS) are the focus of attention owing to the urgent demand for aerospace vehicles to have efficient thermal insulation materials with lightweight, long-term antioxidant, and micro-ablation. However, improving the antioxidant ablation properties in a long-term aerobic atmosphere is still a significant challenge. Herein, a novel strategy to fabricate needle quartz fiber (NQF) reinforced SiO2 aerogel interpenetrating polybenzoxazine (PBO) aerogel thermal protection composites (NQF/SiO2–PBOs) with a binary network structure is proposed. The as-prepared NQF/SiO2–PBOs perfectly inherited their porous nanostructure and captivating properties, including lightweight (0.53 g/cm3), high mechanical strengths, and low thermal conductivity of 0.048 W/(m·K) at 25 °C and 0.079 W/(m·K) at 1100 °C. Moreover, the NQF/SiO2–PBOs exhibited outstanding high-temperature thermal insulation and long-time antioxidant ablation with low linear and mass ablation rates. The cold surface temperature peaked at approximately 307.2 °C within 1800 s when the hot surface temperature exceeded 1100 °C. The ablation/thermal insulation mechanism was also discussed through the analysis of the microstructure, chemical structure, and crystal structure. This research provides a meaningful reference for the development and exploitation of new advanced lightweight, long-term antioxidant, and micro-ablative thermal protective materials.由于航空航天飞行器对轻质、长期抗氧化和微烧蚀的高效隔热材料的迫切需求，已成功应用于热保护系统（TPS）的轻质烧蚀材料成为关注的焦点。然而，在长期有氧环境中提高抗氧化消融性能仍是一项重大挑战。本文提出了一种新的策略来制造具有二元网络结构的针状石英纤维（NQF）增强二氧化硅气凝胶互穿聚苯并恶嗪（PBO）气凝胶热防护复合材料（NQF/SiO2-PBOs）。制备的NQF/SiO2-PBOs完美地继承了其多孔纳米结构和迷人的性能，包括轻质（0.53 g/cm3）、高机械强度和低导热率（25 °C时为0.048 W/(m-K)，1100 °C时为0.079 W/(m-K)）。此外，NQF/SiO2-PBOs 还具有出色的高温隔热性能和长时间抗氧化烧蚀性能，且线性烧蚀率和质量烧蚀率较低。当热表面温度超过 1100 ℃ 时，冷表面温度在 1800 秒内达到峰值，约为 307.2 ℃。通过对微观结构、化学结构和晶体结构的分析，还讨论了烧蚀/隔热机制。这项研究为开发和利用新型先进的轻质、长效抗氧化和微烧蚀热防护材料提供了有意义的参考。Fabrication of photocatalytic PAN nanofiber membrane loading with TiO2@RGO by electro-spinning & electro-sprayingNiu Linyan, Zhang Baichuan, Sun Jun, Wang Jianjun, Qin Chuanxiang, Dai Lixingdoi:10.1016/j.compositesb.2023.111046 通过电纺丝和电喷雾法制备负载 TiO2@RGO 的光催化 PAN 纳米纤维膜The new fibrous photocatalytic nanofiber membrane with both good photodegradation performance and mechanical property was developed. Here, TiO2@RGO (TR) which could disperse in PAN solution stably was prepared by solvothermal method with the help of acetic acid. Then the new photocatalytic PAN nanofiber membrane SS7.5-2.3TR(A) was fabricated for the first time by electro-spinning & electro-spraying, where TR ruled as photocatalysts. Benefited from its novel triple structure, SS7.5-2.3TR(A) had the best toughness when compared with S-0 (electro-spun dual-network structural membrane) and SS7.5 (control membrane without TR in electro-spraying solution). Moreover, the morphology and mechanical property of membrane was similar to that of original SS7.5-2.3TR when it was used to photodegrade methyl orange solution five times later. Meanwhile, SS7.5-2.3TR also had significant photocatalytic performance when applied to the degradation of other three dyes (rhodamine B, methylene blue and oil red) and silk dyeing wastewater, which indicated its potential in dyeing wastewater treatment.新型纤维状光催化纳米纤维膜兼具良好的光降解性能和机械性能。该研究以醋酸为溶剂，采用溶热法制备了可稳定分散于 PAN 溶液中的 TiO2@RGO（TR），并在此基础上制备了新型光催化 PAN 纳米纤维膜 SS7.5-2.3TR。然后，通过电纺丝和电喷雾法首次制备了新型光催化 PAN 纳米纤维膜 SS7.5-2.3TR(A)，其中 TR 作为光催化剂。与 S-0（电纺双网络结构膜）和 SS7.5（电喷雾溶液中不含 TR 的对照膜）相比，SS7.5-2.3TR(A)得益于其新颖的三层结构，具有最佳的韧性。此外，用 SS7.5-2.3TR 光降解甲基橙溶液 5 次后，膜的形貌和机械性能与原 SS7.5-2.3TR 相似。同时，SS7.5-2.3TR 在降解其他三种染料（罗丹明 B、亚甲基蓝和油红）和丝绸染色废水时也具有显著的光催化性能，这表明其在染色废水处理方面具有潜力。Composites Science and TechnologyUltra-sensitive flexible pressure sensor with hierarchical structural laser-induced carbon nanosheets/carbon nanotubes composite filmGuo Xuanqi, Li Yunfan, Zeng Ziran, Zhao Yilin, Lei Xiao, Wang Yaoyu, Guo Dingyi, Liu Fengdoi:10.1016/j.compscitech.2023.110290 采用分层结构激光诱导碳纳米片/碳纳米管复合膜的超灵敏柔性压力传感器Recently, laser induced carbon nanosheets (LICs) based flexible pressure sensors have received widespread attention. Introducing hierarchical microstructure is an effective method to improve the sensitivity of pressure sensors. However, implementing hierarchical microstructure on LICs film through a simple and low damage process remains a challenge. Herein, taking advantage of the reshaping characteristics of low melting point thermoplastic substrate styrene-isoprene-styrene (SIS) under laser thermal effects, a simple and one-step laser thermoforming process is used to spontaneously form surface microstructure on the LICs film during the formation of LICs. Therefore, a hierarchical structure composed of porous structure and surface microstructure was achieved on the LICs film through the one-step process. Furthermore, a hybrid strategy combining hierarchical microstructure with carbon nanotubes (CNTs)/LICs composite was proposed to improve the sensitivity of LICs based pressure sensor. Benefiting from the hierarchical structure of LICs and the composite conductive network constructed by CNTs and LICs, the LICs/CNTs@SIS sensor exhibits ultrahigh sensitivity of 1089 kPa−1 in 0–5 kPa and ultrahigh gauge factor of 1493 within the strain rate range of 20%–28%. Meanwhile, the sensor has good stability (>1400 cycles), response and recovery times of 23.8 ms and 25.9 ms, excellent reversibility, and 1220% elongation at break. Besides, the application of the sensor in physiological signal monitoring and pressure distribution detection indicates its great potential in flexible electronics.最近，基于激光诱导碳纳米片（LICs）的柔性压力传感器受到了广泛关注。引入分层微结构是提高压力传感器灵敏度的有效方法。然而，如何通过简单、低损伤的工艺在 LICs 薄膜上实现分层微结构仍是一项挑战。本文利用低熔点热塑性基材苯乙烯-异戊二烯-苯乙烯（SIS）在激光热效应下的重塑特性，采用简单的一步激光热成型工艺，在 LICs 薄膜形成过程中自发形成表面微结构。因此，一步法工艺在 LICs 薄膜上实现了由多孔结构和表面微结构组成的分层结构。此外，还提出了一种将分层微结构与碳纳米管（CNTs）/LICs 复合材料相结合的混合策略，以提高基于 LICs 的压力传感器的灵敏度。得益于 LICs 的分层结构以及 CNT 与 LICs 构建的复合导电网络，LICs/CNTs@SIS 传感器在 0-5 kPa 范围内表现出 1089 kPa-1 的超高灵敏度，在 20%-28% 应变率范围内表现出 1493 的超高表征因子。同时，该传感器具有良好的稳定性（大于 1400 次循环）、23.8 毫秒和 25.9 毫秒的响应和恢复时间、出色的可逆性以及 1220% 的断裂伸长率。此外，该传感器在生理信号监测和压力分布检测方面的应用表明，它在柔性电子领域具有巨大潜力。来源：复合材料力学仿真Composites FEM