玄武岩纤维表面硅烷偶联剂接枝率对环氧树脂复合材料界面强度及力学性能的影响
作者:
作者单位:

四川大学

作者简介:

通讯作者:

中图分类号:

基金项目:

四川省重大科技专项项目(2019ZDZX0023);四川省重点研发项目(2022YFG0272)


Effects of Silane Coupling Agent Grafted on the Surface of Basalt Fiber on the Interfacial Strength and Tensile Strength of Fiber-Reinforced Epoxy Composites
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    为提高玄武岩纤维(BF)增强环氧树脂(EP)复合材料的力学性能,本文通过接枝硅烷偶联剂KH550来提升BF与EP之间的界面强度。采用衰减全反射红外光谱、X射线光电子能谱仪、原子力显微镜、扫描电子显微镜、界面剪切强度测试和拉伸测试研究BF表面KH550的接枝率对复合材料界面粗糙度、界面强度以及拉伸强度的影响。结果表明,KH550的成功接枝可以增加BF的表面粗糙度以及复合材料的界面强度;随着KH550接枝率的增加,BF表面形貌呈现“光滑-粗糙-光滑-粗糙”的变化过程,复合材料的界面强度及力学性能也呈现先增大后减小的趋势。当KH550接枝率达到5%~6%时,KH550-BF表面均匀光滑,复合材料的界面强度和拉伸强度达到最大,分别为48 MPa和298 MPa。当接枝率超过6%,过量的KH550在BF表面的不均匀分布形成结构缺陷和应力集中,进而导致复合材料界面强度和力学性能的降低。

    Abstract:

    In order to improve the tensile strength of basalt fiber/epoxy (BF/EP) composites, silane coupling agent KH550 was grafted on the surface of BF for enhancing the interfacial strength between BF and EP matrix. The effects of KH550 grafting degree on the surface roughness of BF, the interfacial adhesion between BF and EP matrix and the tensile strength of composites were investigated by attenuated total reflection infrared spectroscopy, X-ray photoelectron spectrometer, atomic force microscopy, scanning electron microscopy, droplet microdebond test and tensile test. Experimental results show that grafting KH550 on the surface of BF reinforces the interface roughness and interfacial strength of KH550-BF/EP composites. With the increase of KH550 grafting degree, the surface morphologies of BF change from smooth to rough, then to smooth, final to rough. Meanwhile, the interfacial strength and tensile strength of composites are also increased firstly, and then reduced. When the KH550 grafting degree reaches about 5%~6%, the surface of BF is smooth, uniform and non-aggregated. And the interfacial strength and tensile strength reach the maximum values of 48 MPa and 298 MPa, respectively. When the KH550 grafting degree exceeds 6%, the surface morphology of KH550-BF becomes non-uniform. Excessive KH550 brings structural defects and stress concentration to the interface, which deteriorates the interface strength as well as the tensile strength of composites.

    参考文献
    相似文献
    引证文献
引用本文
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2021-07-19
  • 最后修改日期:2021-12-24
  • 录用日期:2022-03-25
  • 在线发布日期: 2022-04-07
  • 出版日期:
您是第位访问者
编辑出版:《高分子材料科学与工程》编辑部
地址:四川省成都市一环路南一段24号 四川大学高分子研究所
电话:028-8540 1653  E-mail:gfzclbjb@163.net; gfzclbjb@vip.sina.com
高分子材料科学与工程 ® 2022 版权所有
技术支持:北京勤云科技发展有限公司