[1]倪卓,黄健成,贵大勇.DMA法评价微胶囊-环氧树脂复合材料自修复率[J].深圳大学学报理工版,2015,32(No.5(441-550)):458-464.[doi:10.3724/SP.J.1249.2015.05458]
 Ni Zhuo,Huang Jiancheng,and Gui Dayong.Measurement on self-healing efficiency for UF microcapsules-epoxy composites by DMA method[J].Journal of Shenzhen University Science and Engineering,2015,32(No.5(441-550)):458-464.[doi:10.3724/SP.J.1249.2015.05458]
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DMA法评价微胶囊-环氧树脂复合材料自修复率()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第32卷
期数:
2015年No.5(441-550)
页码:
458-464
栏目:
化学与化工
出版日期:
2015-09-18

文章信息/Info

Title:
Measurement on self-healing efficiency for UF microcapsules-epoxy composites by DMA method
文章编号:
201505003
作者:
倪卓黄健成贵大勇
深圳大学化学与环境工程学院,深圳518060
Author(s):
Ni Zhuo Huang Jiancheng and Gui Dayong
College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, P.R.China
关键词:
自修复材料动态力学分析无损测试恒应变损伤热处理脲醛树脂环氧树脂
Keywords:
self-healing material dynamic mechanical analysis (DMA) nondestructive testing the constant strain generating cracking the heat treatment urea-formaldehydem epoxy
分类号:
O 631.2
DOI:
10.3724/SP.J.1249.2015.05458
文献标志码:
A
摘要:
以脲醛树脂(urea-formaldehydem, UF)为囊壁,正丁基缩水甘油醚改性环氧树脂的修复剂为囊芯,采用原位聚合法合成了UF自修复微胶囊,并以4′,4′-二氨基二苯基甲烷(4′,4′-diaminodiphenylmethane, DDM)作为微胶囊固化剂一起埋植到环氧树脂基体中,制成微胶囊-环氧树脂自修复材料.该微胶囊的囊芯质量分数为71.02%,平均粒径和囊壁厚度分别是105和3 μm,囊壁表面粗糙而致密,与基体的界面结合较好,微胶囊在环氧树脂中分布均匀.UF微胶囊-环氧树脂复合材料经过恒应变损伤后产生裂纹,并在材料内部破裂,导致改性的环氧树脂修复剂从破裂的微胶囊流出至裂纹表面,改性的环氧树脂与设计的固化剂接触,在高温下发生有效的固化交联反应自动修复裂纹.热处理条件(60 ℃,2 h)可消除材料基体内残留的环氧活性中心与未反应的基体固化剂二乙烯三胺,在高于玻璃化转变温度tg的区域发生后固化反应,是测量UF微胶囊-环氧树脂复合材料自修复率的重要条件.采用动态力学分析(dynamic mechanical analysis, DMA)法测定的复合材料自修复率为103.03%,该方法便速、无损,具有良好的重复性,可用于表征材料自修复率.
Abstract:
Urea-formaldehyde (UF) microcapsules with UF resin as shell and butyl glycidyl ether modified epoxy as core were synthesized by in-situ polymerization. 4′,4′-diaminodiphenylmethane (DDM) employed as a latent curing agent for a cross-linking chemical reaction for crack repairing was added together with UF microcapsules into an epoxy substrate to fabricate microcapsule-epoxy self-healing composites. The degree of damage of the UF microcapsule-epoxy composite is effectively controlled by a constant strain three-point bending fixture. The self-repairing performance of the composite was characterized by using dynamic mechanical analysis (DMA). Results show that rough and compact surfaces of spherical microcapsules with a core content of 71.02% without accumulation between microcapsules are achieved. The microcapsules are normally distributed with average diameter of 105 μm and shell thickness of 3 μm. A good dispersion of UF microcapsules in the epoxy composite and a good interfacial bonding are obtained.A post curing reaction between the residual epoxide and the unreacted diethylenetriamine (DETA) within the composite cured at room temperature occurs at the temperature over the glass-transition temperature tg, which may interfere with evaluating the self-healing efficiency. A heat treatment condition (60 ℃ for 2 h) is important for the measurement on the self-healing efficiency. The self-healing efficiency of microcapsule-epoxy composite is measured to be 103.03% by the DMA method. Convenient, rapid, reliable, non-destructive and reproducible, the DMA method can be used to characterize self-healing efficiency.

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备注/Memo

备注/Memo:
Received:2015-05-21;Accepted:2015-06-28
Foundation:National Natural Science Foundation of China (51378315); Research & Development Fund of Shenzhen (JCYJ20130329114709152)
Corresponding author:Professor Ni Zhuo.E-mail: royzhuoni@hotmail.com
Citation:Ni Zhuo, Huang Jiancheng, Gui Dayong. Measurement on self-healing efficiency for UF microcapsules-epoxy composites by DMA method[J]. Journal of Shenzhen University Science and Engineering, 2015, 32(5): 458-464.(in Chinese)
基金项目:国家自然科学基金资助项目 (51378315);深圳市科学技术研究与发展基金资助项目(JCYJ20130329114709 152)
作者简介:倪卓(1963—),男(汉族),吉林省通化市人,深圳大学教授、博士生导师.E-mail: royzhuoni@hotmail.com
引文:倪卓,黄健成,贵大勇. DMA法评价微胶囊-环氧树脂复合材料自修复率[J]. 深圳大学学报理工版,2015,32(5):458-464.
更新日期/Last Update: 2015-09-15