Study on the Properties of Epoxy Resins Modified by Nano-Silica

CHEN Yu-fei; LI Shi-xia; BAI Meng-yao; XIAO Yi-yue; YUAN Guang-xue; ZHANG Shou-hao

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Study on the Properties of Epoxy Resins Modified by Nano-Silica

更新时间：2026-07-10

- Study on the Properties of Epoxy Resins Modified by Nano-Silica
- Vol. 16, Issue 4, Pages: 21-25(2011)
- 作者机构：
  
  哈尔滨理工大学材料科学与工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TQ433.437
- Published：2011
- 稿件说明：
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CHEN Yu-fei, LI Shi-xia, BAI Meng-yao, et al. Study on the Properties of Epoxy Resins Modified by Nano-Silica[J]. 2011, 16(4): 21-25.
DOI：

CHEN Yu-fei, LI Shi-xia, BAI Meng-yao, et al. Study on the Properties of Epoxy Resins Modified by Nano-Silica[J]. 2011, 16(4): 21-25. DOI：

摘要

采用聚氨酯增韧环氧树脂

并利用有机化的纳米SiO2为改性剂制备纳米改性环氧树脂胶黏剂.利用扫描电子显微镜(SEM)观察无机纳米粒子在聚合物基体中的分散性及复合材料的断面形貌

结果表明无机纳米粒子在复合材料中分散性良好

而且聚氨酯在环氧树脂基体中形成了孔洞结构.采用电子拉力机、TGA以及介电谱仪等方法测试了复合材料的力学性能、热稳定性能和介电损耗、介电常数等性能.结果表明

纳米SiO2在一定的掺杂量下有利于力学性能的提高

当质量分数为2%时

材料的剪切强度和弹性模量比掺杂前分别提高173%和95%;热分解温度也有一定程度的提高

当掺杂2wt%时

热分解温度比掺杂前提高8.1℃;介电常数(ε)的变化表现为:随频率增加而下降

随无机组分增加而增大;介电损耗(tanδ)则得到了明显的改善

在频率1kHz时介电损耗相对较好.

Abstract

Organic precursor of EP/PU was prepared by epoxy resin which was polyurethane toughened

and then modified epoxy resin adhesive was synthesized using nano-silica as modifier.Microstructure of composite materials was observed by scanning electron microscopy(SEM).The results showed that the inorganic phase had well dispersed in the polymer matrix

and the polyurethane has formed the hole structure in the epoxy resin substrate.The mechanical properties

thermal stability and dielectric loss

dielectric constant of...

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