Sizing-agent control of the high-focusing and spread-ability of a melt-spun polyacrylonitrile-based carbon fiber and its interfacial shear strength

IF 5.5 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY Carbon Letters Pub Date : 2024-09-11 DOI:10.1007/s42823-024-00798-y

MoonHeui Han, WangGeun Song, Doo-Won Kim

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Abstract

The surface treatment processes of carbon fibers is very important, because of their significant impact on fiber handling, filament protection, and interfacial properties. In this study, the effects of two different sizing agents with different molecular weights, with or without a nonionic surfactant, on the performance of a melt-spun polyacrylonitrile-based carbon fiber and carbon fiber/epoxy interfacial adhesion are investigated. The focusing property and spread-ability of a low-molecular-weight sizing agent with a surfactant show outstanding performances because of the high penetration between the fibers and high interfacial bonding with the fibers. In addition, wettability of the matrix (epoxy resin) of the low-molecular-weight sizing agent are superior to those of the high-molecular-weight sizing agent. Furthermore, the nonionic surfactant used as an assistant improves the sizing amount and wettability by forming micelles with the epoxy. The interfacial shear strength (IFSS) of the low-molecular-weight sizing agent with a surfactant is also superior to that of other sizing agents. The IFSS is closely related to the sizing amount of the coating on the carbon fiber surface and matrix wettability.

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上浆剂控制熔融纺丝聚丙烯腈基碳纤维的高聚焦性和铺展性及其界面剪切强度

碳纤维的表面处理工艺非常重要，因为它们对纤维处理、长丝保护和界面性能有重大影响。本研究调查了两种不同分子量的上浆剂（含或不含非离子表面活性剂）对熔纺聚丙烯腈基碳纤维性能和碳纤维/环氧树脂界面粘附性的影响。含有表面活性剂的低分子量上浆剂由于在纤维间的高渗透性和与纤维的高界面粘合性，在聚焦性能和铺展性方面表现出色。此外，低分子量上浆剂对基体（环氧树脂）的润湿性也优于高分子量上浆剂。此外，作为辅助剂的非离子表面活性剂通过与环氧树脂形成胶束，提高了施胶量和润湿性。含有表面活性剂的低分子量施胶剂的界面剪切强度（IFSS）也优于其他施胶剂。IFSS 与碳纤维表面涂层的施胶量和基体润湿性密切相关。

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来源期刊

Carbon Letters CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.30

自引率

20.00%

发文量

118

期刊介绍： Carbon Letters aims to be a comprehensive journal with complete coverage of carbon materials and carbon-rich molecules. These materials range from, but are not limited to, diamond and graphite through chars, semicokes, mesophase substances, carbon fibers, carbon nanotubes, graphenes, carbon blacks, activated carbons, pyrolytic carbons, glass-like carbons, etc. Papers on the secondary production of new carbon and composite materials from the above mentioned various carbons are within the scope of the journal. Papers on organic substances, including coals, will be considered only if the research has close relation to the resulting carbon materials. Carbon Letters also seeks to keep abreast of new developments in their specialist fields and to unite in finding alternative energy solutions to current issues such as the greenhouse effect and the depletion of the ozone layer. The renewable energy basics, energy storage and conversion, solar energy, wind energy, water energy, nuclear energy, biomass energy, hydrogen production technology, and other clean energy technologies are also within the scope of the journal. Carbon Letters invites original reports of fundamental research in all branches of the theory and practice of carbon science and technology.