异氰酸酯基硅烷偶联剂改性石英纤维/含硅芳炔复合材料界面

复合材料科学与工程 ›› 2013, Vol. 0 ›› Issue (8): 44-50.

异氰酸酯基硅烷偶联剂改性石英纤维/含硅芳炔复合材料界面

梁秀华, 扈艳红^*, 杜磊, 黄发荣

华东理工大学材料科学与工程学院,特种功能高分子材料及相关技术教育部重点实验室,上海 200237

收稿日期:2012-12-18 出版日期:2013-11-28 发布日期:2022-03-22
通讯作者: 扈艳红(1972-),女,副研究员,主要从事树脂基复合材料的表界面改性研究。
作者简介:梁秀华(1987-),女,硕士研究生,主要从事树脂基复合材料的表界面改性研究。
基金资助:
国家自然科学基金项目(51073054); 上海市重点学科(B502)

INTERFACIAL MODIFICATION OF QUARTZ FIBER REINFORCED SILICON-ARYLACETYLENE-CONTAINING RESIN COMPOSITE BY COUPLING AGENT

LIANG Xiu-hua, HU Yan-hong^*, DU Lei, HUANG Fa-rong

Key Laboratory for Special Polymer Materials and Related Technology, School of Material Science and Engineering, East China University of Science and Technology, Shanghai 200237, China

Received:2012-12-18 Online:2013-11-28 Published:2022-03-22

摘要/Abstract

摘要： 含硅芳炔树脂是一类有机无机杂化树脂,它的分子极性小,表面能低,与石英纤维复合时的粘结性能差,影响复合材料的力学性能。本文采用一种结构中含有异氰酸酯基的硅烷偶联剂对石英纤维/含硅芳炔复合材料进行改性,实验结果表明经偶联剂改性后复合材料的层间剪切强度有了较大的提高,与未处理的相比可提升41.5%。XPS、表面能分析、AFM、SEM等分析表征推断,偶联剂的改性机理为偶联剂与石英纤维表面活性基团作用,在纤维表面生成极性官能团,增大石英纤维的表面能,改善了与含硅芳炔树脂的界面粘结性能,使得复合材料的层间剪切强度提高。

关键词: 异氰酸酯, 硅烷偶联剂, 石英纤维, 含硅芳炔, 界面改性

Abstract: Silicon-arylacetylene-containing resins are organic and inorganic hybrid resins. They were potentially useful as functional materials and exhibited remarkable heat resistant properties and good anti-ablative performances. While, the poor interfacial adhesion with quartz fiber limited the mechanical properties of their composites, due to the resins'weak molecular polarity and low surface energy. A silane coupling agent containing isocyanate was designed and employed in this paper in order to modify the interface of quartz fiber reinforced silicon containing arylacetylene (PSA) composite. The results showed that the interlaminar shear strength (ILSS) of the treated quartz fiber-PSA composite has been greatly improved by 44.7% compared with those untreated. The characterization of the fibers and composites with X-ray photoeletron spectroscopy (XPS), surface energy analysis, atom force microscope (AFM) and scanning electron microscope (SEM) revealed that the coupling agent reacted with the active groups on fiber surface and polar functional groups generated, which increased the quartz fiber's surface energy. As the result, the interfacial adhesion performance between the fibers and the resin improved, the composite's interlaminar shear strength increased.

Key words: isocyanate, silane coupling agent, quartz fiber, PSA resin, interfacial modification

中图分类号:

TB332
TQ342

梁秀华, 扈艳红, 杜磊, 黄发荣. 异氰酸酯基硅烷偶联剂改性石英纤维/含硅芳炔复合材料界面[J]. 复合材料科学与工程, 2013, 0(8): 44-50.

LIANG Xiu-hua, HU Yan-hong, DU Lei, HUANG Fa-rong. INTERFACIAL MODIFICATION OF QUARTZ FIBER REINFORCED SILICON-ARYLACETYLENE-CONTAINING RESIN COMPOSITE BY COUPLING AGENT[J]. COMPOSITES SCIENCE AND ENGINEERING, 2013, 0(8): 44-50.

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