【新文速递】2023年10月17日复合材料SCI期刊最新文章
今日更新：Composites Part A: Applied Science and Manufacturing 1 篇，Composites Part B: Engineering 2 篇，Composites Science and Technology 1 篇
Composites Part A: Applied Science and Manufacturing
Exceptional dynamic compressive properties of bio-inspired three-dimensional interlocking graphene network reinforced copper matrix composites
Li Bowen, Lin Dong, Zhang Xiang, Zhao Dongdong, He Chunnian, Zhao Naiqin
doi:10.1016/j.compositesa.2023.107856
受生物启发的三维交错石墨烯网络增强铜基复合材料的卓越动态抗压性能
Insights into the reinforcement spatial architectures and their fundamental effects on the dynamic mechanical behaviors are of great importance for designing shock-resistant metallic structures. In this study, we report copper matrix composites (CMCs) reinforced by three-dimensional interlocking graphene network (3D-IGN) with a unique bio-inspired “brick-bridge-mortar” structure. Our results demonstrate that the 3D-IGN/Cu shows simultaneously enhanced dynamic strength and ductility as compared to the uniformly-distributed RGO/Cu and pure Cu at the specific strain rate from 1000 s-1 to 8000 s-1. The interlocking network structure not only blocks dislocation movement and restricts grain boundary sliding, but also alleviates the heat-induced softening by improving the thermal conductivity in the horizontal direction. The finite element simulation results further confirm the important role of the graphene network on strain delocalization. This work offers a promising bottom-up tactic to fabricate CMCs with network architecture and superior dynamic properties for high-rate applications.
深入了解增强空间结构及其对动态力学行为的基本影响，对于设计抗冲击金属结构具有重要意义。在本研究中，我们报告了由三维交错石墨烯网络（3D-IGN）加固的铜基复合材料（CMC），该网络具有独特的生物启发 "砖桥-砂浆 "结构。我们的研究结果表明，与均匀分布的 RGO/Cu 和纯铜相比，在 1000 s-1 到 8000 s-1 的特定应变速率下，3D-IGN/Cu 同时显示出更高的动态强度和延展性。交错网络结构不仅阻止了位错运动，限制了晶界滑动，还通过提高水平方向的热传导率减轻了热致软化。有限元模拟结果进一步证实了石墨烯网络对应变分散的重要作用。这项研究为制造具有网络结构和优异动态特性的 CMC 提供了一种自下而上的可行方法，可用于高速率应用。
Composites Part B: Engineering
Moisture diffusion and tensile properties of epoxy-based and polyurethane-based flax-glass hybrid FRP under hygrothermal and weathering environments
Huang Silu, Yan Libo, Kasal Bohumil, Wei Yang
doi:10.1016/j.compositesb.2023.111049
环氧基和聚氨酯基亚麻-玻璃混合玻璃钢在湿热和风化环境下的湿气扩散和拉伸性能
This research presents tensile modulus and strength of flax-glass hybrid FRP (HFRP) flat coupons with different fibre volume fractions and fabric stacking sequences under constant hygrothermal (50 °C and 95% RH) and cyclic weathering (water spray-ultraviolet radiation) environments for six months. Two types of polymer (i.e., epoxy (EP) and polyurethane (PUR)) were employed in HFRP. Fourier transformed infrared spectroscopy (FTIR) was performed to identify the changes in functional groups of flax fibres and polymer matrix after exposures. The glass transition temperature (Tg) of polymer matrix was measured by differential scanning calorimetry (DSC), which was used to study the influence of environmental exposure on Tg. The 3D diffusion coefficients of EP-based flax FRP and glass FRP laminates were determined based on experimental moisture uptake and Fick's law. A coupled mass diffusion-stress analysis based on finite element (FE) model was conducted to simulate the moisture diffusion and swelling behaviour of HFRP. The results showed that hygrothermal and weathering exposures hardly affected tensile modulus of HFRP regardless of the matrix type. After the environmental exposure, EP-based HFRP experienced lower retention ratio of tensile strength (65.4–88.0%) compared to PUR-based HFRP (80.7–94.1%) because of higher moisture absorption in the EP-based HFRP. The influence of fabric stacking sequence on tensile strength reduction varied with different fibre volume fractions in EP-based HFRP, which was explained by the combined effects of the internal stress and damage propagation at flax-glass interface.
本研究介绍了在恒定湿热（50 °C，95% RH）和循环风化（水雾-紫外线辐射）环境下，不同纤维体积分数和织物堆叠顺序的亚麻-玻璃混合玻璃纤维增强塑料（HFRP）平板的拉伸模量和强度，为期六个月。高频纤维增强塑料采用了两种聚合物（即环氧树脂（EP）和聚氨酯（PUR））。傅立叶变换红外光谱（FTIR）用于确定亚麻纤维和聚合物基体在暴露后的官能团变化。玻璃化温度（Tg）通过差示扫描量热法（DSC）测量了聚合物基体的 Tg 值，并利用该方法研究了环境暴露对聚合物基体的影响。根据实验吸湿量和菲克定律确定了 EP 基亚麻玻璃钢和玻璃钢层压板的三维扩散系数。在有限元（FE）模型的基础上进行了质量扩散-应力耦合分析，以模拟 HFRP 的水分扩散和膨胀行为。结果表明，无论基体类型如何，湿热暴露和风化暴露几乎不会影响 HFRP 的拉伸模量。环境暴露后，EP 基高频增强塑料的拉伸强度保持率（65.4-88.0%）低于 PUR 基高频增强塑料（80.7-94.1%），原因是 EP 基高频增强塑料的吸湿率较高。在 EP 基高频增强塑料中，织物堆叠顺序对拉伸强度降低的影响随纤维体积分数的不同而变化，其原因是亚麻-玻璃界面的内应力和损伤扩展的综合影响。
Transforming diapers into inorganic carbonate enriched Carbon catalyst for improved trimethoprim degradation performance
Lee Ye Bin, Narendra Kumar Alam Venugopal, Shin Won Sik
doi:10.1016/j.compositesb.2023.111051
将尿布转化为富含无机碳酸盐的碳催化剂，提高三甲氧苄啶的降解性能
Waste-derived carbon materials are gaining popularity in persulfate/peroxymonosulfate activated water remediation process. In the present study, a carbon catalyst was prepared from baby diaper through simple pyrolysis step, and its catalytic activity was assessed through PMS activated trimethoprim (TMP) degradation. X-ray diffraction and Fourier-transform infrared spectroscopic characterization results revealed that the synthesized carbon material is complemented with sodium carbonate inorganic salt. The catalyst derived from diaper exhibits two important characteristics that make it practically applicable. Firstly, it has a high efficiency for removing TMP, and secondly, it maintains an ecological pH (7.5) level even after undergoing oxidation. Electron spin resonance and scavenging studies showed singlet oxygen was the predominant reactive oxygen species in the system. As a result, the system exhibited high tolerance to commonly found inorganic anions in the water bodies. These features make the diaper derived carbon catalysts a promising candidate for the degradation of TMP from wastewater, also providing an alternative solution for mitigating pollution of diapers in landfills.
废物衍生碳材料在过硫酸盐/过硫酸盐活化水修复过程中越来越受欢迎。本研究以婴儿尿布为原料，通过简单的热解步骤制备了一种碳催化剂，并通过 PMS 活性三甲氧苄啶（TMP）降解评估了其催化活性。X 射线衍射和傅立叶变换红外光谱表征结果表明，合成的碳材料中添加了碳酸钠无机盐。从尿布中提取的催化剂具有两个重要特点，使其具有实用性。首先，它具有很高的 TMP 去除效率；其次，即使在氧化过程中，它也能保持生态 pH 值（7.5）。电子自旋共振和清除研究表明，单线态氧是该系统中最主要的活性氧。因此，该系统对水体中常见的无机阴离子具有很强的耐受性。这些特点使纸尿裤衍生碳催化剂成为降解废水中三羟甲基丙烷的理想候选物质，同时也为减轻垃圾填埋场中纸尿裤的污染提供了一种替代解决方案。
Composites Science and Technology
An ingenious composite microstructure of mantis shrimp appendage for improving impact resistance
Yang Xiao, Wang Ming, Bai Pucun, Niu Shichao, Song Honglie, Ni Jing, Shao Chun, Cao Xuwei
doi:10.1016/j.compscitech.2023.110310
一种巧妙的螳螂虾附肢复合微结构可提高抗冲击性
Mantis shrimp appendage, as an important weapon for hunting, have remarkable impact resistance due to their unique microstructure. In this study, the appendages were subjected to falling ball impact tests and their fracture surfaces were observed by scanning electron microscopy. It was observed that the outer layer was prone to brittle fracture, while the inner layer was more flexible and turned the brittle fracture into a ductile fracture. Our study supported the idea that the unique microstructures in the appendages act as barriers against crack growth and therefore play a leading role in the toughening of the entire appendage structure. Based on the bionic inspiration of the appendage microstructure, a bionic composite structure was designed, which consists of a rigid outer layer and a flexible inner layer. The fibers in the flexible layer show a longitudinal and sinusoidal arrangement to provide shielding to the crack tip when the fracture occurs. The toughening mechanism of the microstructure was further corroborated through finite element simulations, which demonstrated that the longitudinal arrangement of fibers played a pivotal role in spreading stress concentration and thereby delaying the fracture process. The sinusoidal arrangement of fibers was also found to be instrumental in not only bridging the rigid and flexible layers, but also in directing the deviation of the crack path. This work was enlightening for the structural design of impact-resistant composites.
螳螂虾附肢是一种重要的狩猎武器，因其独特的微观结构而具有显著的抗冲击性。本研究对附肢进行了落球冲击试验，并利用扫描电子显微镜对其断裂面进行了观察。结果表明，外层容易发生脆性断裂，而内层则更具弹性，可将脆性断裂转化为韧性断裂。我们的研究支持了这一观点，即附肢中独特的微结构是阻止裂纹生长的屏障，因此在整个附肢结构的增韧过程中起着主导作用。根据附肢微结构的仿生灵感，我们设计了一种仿生复合结构，它由刚性外层和柔性内层组成。柔性层中的纤维呈纵向正弦排列，在发生断裂时对裂纹尖端起到屏蔽作用。有限元模拟进一步证实了微结构的增韧机理，证明纤维的纵向排列在分散应力集中从而延缓断裂过程中发挥了关键作用。研究还发现，纤维的正弦排列不仅有助于连接刚性层和柔性层，还能引导裂纹路径的偏离。这项研究对抗冲击复合材料的结构设计具有启发意义。
