共查询到17条相似文献,搜索用时 109 毫秒
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综述了近几年用于芳纶表面改性的物理方法的研究进展,重点介绍了表面涂层、等离子体处理、γ射线处理、超声波处理、紫外线辐射和超低温处理等改性方法的研究现状及优缺点,并对芳纶表面改性的发展趋势进行了展望。 相似文献
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芳纶表面及界面改性技术的研究现状及发展趋势 总被引:27,自引:3,他引:27
本文综述了目前国内外针对芳纶表面进行改性的研究现状,对各种改性技术的特点进行了评述,并指出了其进一步的发展趋势。 相似文献
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Aramid fibers have excellent mechanical properties as the main reinforcing filler in high-performance composites. However, the adhesion properties between fibers and most polymer matrices were poor. In this study, aramid fiber (AF) was modified by KH550 through surface coating based on the treatment with CaCl2 solution. The new surface treated with complexing agents could act as an active platform for secondary reactions for further modification. The surface morphology and composition of the treated aramid fibers were tested by scanning electron spectroscopy and X-ray photoelectron spectroscopy, the interlaminar shear strength and the tensile strength of aramid fiber-reinforced polymer (AFRP) of were evaluated. The results showed that the silane coupling agent KH550 was successfully grafted onto the surface of aramid fibers after treatment with CaCl2. Interlayer shear strength is greatly improved and the tensile strength of AFRP through further grafting with KH550 on the surface treated with CaCl2 was improved by 48.7%, compared with untreated aramid fiber. In the current scenario, this study is of immense importance because it validates the possibility of secondary modification after fiber complexation modification and useful modification methods, and provides a new direction for the modification of AF. 相似文献
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Improving compressive strength of aramid and its adhesion to resin is of great significance for its application in reinforcing materials. In this study, a novel method for improving interfacial and compressive properties of aramid fiber is presented. α,α′‐Dichloro‐p‐xylene (DCX) is utilized as an external crosslinker to modify aramid fiber containing benzimidazole units during the post swelling process. Chloromethyl groups from DCX can react with benzimidazole moieties of the aramid fiber. The reaction can be regarded as crosslinking inside the fiber and grafting on the surface. By controlling the swelling effect of the solvent during modification, bulk crosslinking degree and surface grafting density can be adjusted. Therefore, intermolecular interaction and surface polarity of the aramid fiber can be improved simultaneously. After modification, the compressive strength of the fiber can be enhanced by nearly 100% and interfacial shear strength increases by 37%, while excellent mechanical properties are maintained. Therefore, comprehensive performance of aramid fiber can be improved significantly by synchronously crosslinking and grafting. 相似文献