高性能环氧热固性和CFRP复合材料“章鱼”型POSS纳米结构触发互穿网络的构建

IF 9.8 1区 材料科学 Q1 MATERIALS SCIENCE, COMPOSITES
Mengyuan Hao , Jiaming Yang , Chengxi Zhu , Yonggang Zhang , Xin Qian , Jianhai Zhi , Li Liu , Yudong Huang
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引用次数: 0

摘要

同时增韧和增强环氧热固性树脂仍然是先进碳纤维增强聚合物(cfrp)中使用的高性能基体的关键挑战。在本研究中,合成了一系列具有不同侧链结构的“章鱼”状纳米poss填料,并将其作为原位互穿网络(IPN)的增韧核心。该方法旨在通过多种机制实现协同增韧和强化,主要包括颗粒脱粘和塑性剪切变形。首先,系统地研究了POSS侧链结构对结构相关参数的关键影响,重点研究了物理纠缠和空间障碍。研究证实,POSS内扩展的柔性线段促进了强健的物理纠缠,有效地增加了系统的交联密度,从而增强了系统的能量吸收能力。结果表明,与纯环氧树脂相比,基体的最大抗拉强度和冲击韧性分别达到105 MPa和40.3 kJ/m2,抗拉强度提高19.3%,冲击韧性提高155.1%。cfrp在弯曲性能、冲击韧性和层间剪切强度(ILSS)方面的显著改善已经被证明,有效地验证了它们的性能增强。其中,E/V/OCPC复合材料的抗弯强度和冲击韧性分别达到473 MPa和53.8 kJ/m2,比EP复合材料分别提高了20.1%和47.0%。基体和复合材料性能的显著提高凸显了构建均匀协同增韧体系和优化纳米填料物理缠结在开发高性能复合材料中的作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Construction of “octopus"-like POSS nanostructure triggerring interpenetrating network for high-performance epoxy thermosets and CFRP composites

Construction of “octopus"-like POSS nanostructure triggerring interpenetrating network for high-performance epoxy thermosets and CFRP composites
Simultaneously toughening and strengthening epoxy thermosets remains the critical challenge in the advancement of high-performance matrices used in advanced carbon fiber reinforced polymers (CFRPs). In this research, a series of “octopus"-like nano-POSS fillers with diverse side-chain structures were synthesized and incorporated as the toughening core in an in-situ interpenetrating network (IPN). This approach aims to achieve synergistic toughening and strengthening through multiple mechanisms, primarily including particle debonding and plastic shear deformation. Firstly, the critical impacts of side-chain structures in POSS on structure-related parameters were systematically investigated, with particular emphasis on physical entanglement and spatial hindrance. It was confirmed that extended flexible linear segments within POSS promoted robust physical entanglement, effectively increasing the cross-link density of the system and thereby enhancing its energy absorption capabilities. As a result, the maximum tensile strength and impact toughness of the matrix reached 105 MPa and 40.3 kJ/m2, respectively, representing a 19.3 % increase in tensile strength and a remarkable 155.1 % improvement in impact toughness compared to pure epoxy. Significant improvements in flexural properties, impact toughness, and interlaminar shear strength (ILSS) of CFRPs have been demonstrated, effectively validating their performance enhancements. Specifically, for the E/V/OCPC composite, the flexural strength and impact toughness were elevated to 473 MPa and 53.8 kJ/m2, marking respective improvements of 20.1 % and 47.0 % over EP composites. The considerable enhancement in the properties of the matrix and composites underscores the efficacy of constructing homogeneous synergistic toughening systems and optimizing the physical entanglement of nanofillers in developing advanced composites with superior performance.
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来源期刊
Composites Science and Technology
Composites Science and Technology 工程技术-材料科学:复合
CiteScore
16.20
自引率
9.90%
发文量
611
审稿时长
33 days
期刊介绍: Composites Science and Technology publishes refereed original articles on the fundamental and applied science of engineering composites. The focus of this journal is on polymeric matrix composites with reinforcements/fillers ranging from nano- to macro-scale. CSTE encourages manuscripts reporting unique, innovative contributions to the physics, chemistry, materials science and applied mechanics aspects of advanced composites. Besides traditional fiber reinforced composites, novel composites with significant potential for engineering applications are encouraged.
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