相反转法水性环氧树脂的制备.pdf

学鱼兔
化工进展
3388
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2015年第34卷第9期
研究开发
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反转法水性环氧树脂的制备
李金凤',刘立柱2,张笑瑞
(哈尔滨理工大学材料科学与工程学院,黑龙江哈尔滨150040;2哈尔滨理工大学工程电介质及其应用技术
教育部重点实验室,黑龙江哈尔滨150080)
摘要:以Span-80和SDS为复合乳化剂,将环氧树脂E-S1用相反转法乳化成水包油的稳定乳液。研究了复合乳
化荆的亲水亲油平衡值(HLB)、乳化剂的浓度以及乳化温度对环氧树脂E-51相反转点时含水量R:值、乳液的
粒径及粒径分布和乳液离心稳定性的影响,并通过透射电(TEM)对乳液粒子的大小、形貌进行表征。结果
表明:当复合乳化剂的HⅢLB值为16,2,即Span-80与SDS的质量比为2:1时,乳化剂的质量分数为9%,乳化
温度为50℃时,得到的乳液稳定性最好,乳液粒子大小均匀、粒径分布较窄。
关键词:相反转;环氧树脂E-51;小分子表面活性剂;稳定性
中图分类号:TQ630.49文献标志码:A文章编号:1000-6613(2015)09-388-04
DOL:10.16085/issn.1000-6613.2015.09.029
Preparation of water-based epoxy emulsions by phase inversion
emulsification technique
Lljinfeng Liulizhu'", ZHANG Xiaor
(College of Material Science &Engineering, Harbin University of Science and Technology, Harbin 150040
Heilongjiang, China: College of Electrical &Electronic Engineering, Key Laboratory of Engineering Dielectric and Its
Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150040, Heilongjiang, China
Abstract: The water-based epoxy emulsion was prepared by the phase inversion emulsification
technique. Eftects of mass ratio, the amount of the mixed emulsifiers, and emulsification temperature
on the properties of the emulsion during the phase inversion process were investigated by particle size
analysis, centrifugal sedimentation analysis and water content test. The final morphologies of particles
were characterized by TEM. The results show that the optimal emulsion was obtained when the mass
ratio of S-80 and SDS was 2. 1, the amount of the mixed emulsifiers was 9wt%, and the
emulsification temperature was 50 C
Key words: phase inversion bisphenol A epoxy resin E-51 small-molecule surfactants; stability
环氧树脂具有优异的黏结性能、力学性能、电最低,分散相的尺寸最小。Akay等?研究了聚合物
绝缘性能和耐化学稳定性,已广泛应用在涂料、胶熔体相反转乳液过程的机理,并且论述了聚合物熔
黏剂和密封剂等领域。在我国,环境保护问题己体状态向固态状态转变的过程是如何为相反转的进
引起极大重视,水性环氧树脂的研究也成为了研究行提供驱动力的。杨振忠等図用自制的二元多嵌段
的焦点2?。相反转法是一种制备高分子树脂乳液较高分子乳化剂将环氧树脂E-20制成乳液。施雪珍
为有效的方法,可将环氧树脂借助于外加乳化剂的
作用并通过物理乳化的方法制得稳定的乳液?。相收稿日期:2041210修改稿日期:2015-05-12
反转法是指多组分体系中的连续相在一定条件下相
基金项目:国家重点基础研究发展计划项目(2012CB723308)。
第一作者:李金风(1989-),女,硕上研究生。联系人刘立柱,教
互转化的过程。在相反转点附近,体系的界面张力授,博士生导卯。E-mailliulizhuhust@l63.com