现代纺织技术 ›› 2022, Vol. 30 ›› Issue (6): 63-72.DOI: 10.19398/j.att.202203065

• 材料工程 • 上一篇    下一篇

多酚-氨基硅烷改性超高分子量聚乙烯纤维的制备及其界面性能

汪维海1, 陈宏2, 黄志超1, 姚湘江2, 吴金丹1, 戚栋明1   

  1. 1.浙江理工大学绿色低碳染整技术浙江省工程研究中心,杭州 310018;
    2.浙江千禧龙纤特种纤维股份有限公司,浙江永康 321300
  • 收稿日期:2022-03-28 出版日期:2022-11-10 网络出版日期:2022-11-16
  • 通讯作者:吴金丹,E-mail:wujindan@zstu.edu.cn
  • 作者简介:汪维海(1996—),男,河南濮阳人,硕士研究生,主要从事纤维改性方面的研究。
  • 基金资助:
    浙江省重点研发计划项目(2021C01124)

Preparation and interfacial properties of UHMWPE fibers modified by polyphenol & amino silane

WANG Weihai1, CHEN Hong2, HUANG Zhichao1, YAO Xiangjiang2, WU Jindan1, QI Dongming1   

  1. 1. Zhejiang Provincial Engineering Research Center for Green and Low-carbon Dyeing & Finishing, Zhejiang Sci-Tech University, Hangzhou 310018, China;
    2. Zhejiang Qianxilong Special Fiber Co., Ltd. , Yongkang 321300, China
  • Received:2022-03-28 Published:2022-11-10 Online:2022-11-16

摘要: 为提高超高分子量聚乙烯(UHMWPE)纤维与环氧树脂的界面剪切强度,选用3种多酚类化合物(多巴胺、邻苯二酚和单宁酸)对UHMWPE纤维进行表面改性,再利用引入的反应性官能团接枝3-氨丙基三乙氧基硅烷(KH550)。采用扫描电子显微镜(SEM)、X射线光电子能谱(XPS)、X射线衍射(XRD)等测试手段对改性前后纤维的表面形貌、元素组成、结晶度等理化性质进行表征,探究多酚化合物种类、硅烷反应浓度和反应时间等因素对界面剪切强度的影响,并确定最佳改性条件。结果表明:多酚改性及氨基硅烷二次改性对纤维本体的结晶度和力学强度未造成显著影响;改性后的纤维和环氧树脂之间的界面剪切强度均有显著提高,质量分数3%的多巴胺-氨基硅烷改性3 h的纤维界面增强效果最佳,界面剪切强度提高了134.56%。

关键词: 多巴胺, 邻苯二酚, 单宁酸, 硅烷偶联剂, 超高分子量聚乙烯纤维, 界面剪切强度

Abstract: In order to improve the interfacial shear strength between ultra-high molecular weight polyethylene (UHMWPE) fiber and epoxy resin, three polyphenols (dopamine, catechol and tannic acid) were used for the surface modification of UHMWPE fiber, and then 3-(aminopropyl)triethoxysilane (KH550) was grafted with the introduced reactive functional groups. The surface morphology, element composition and crystallinity of the modified fiber were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). The effects of polyphenol type, silane reaction concentration and reaction time on interfacial shear strength were investigated, and the optimum modification conditions were determined. It was found that the modification process had no significant effect on the crystallinity and mechanical strength of the fiber. The interfacial shear strength between the modified fiber and epoxy resin was improved significantly. The interfacial shear strength between fiber modified by dopamine and amino silane (3%, 3 h) and epoxy resin increased by 134.56%.

Key words: dopamine, catechol, tannin, silane coupling agent, ultra-high molecular weight polyethylene fiber, interfacial shearing strength

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