壳聚糖季铵盐/水性环氧树脂体系的制备及性能研究
Preparation and performance of chitosan quaternary ammonium salt/waterborne epoxy resin system
王继业 1李川茜 1潘健强 1徐宏俊 1陈昌彪 1张艳1
作者信息
- 1. 浙江农林大学化学与材料工程学院,浙江 杭州 311300
- 折叠
摘要
将壳聚糖季铵盐(QCS)水溶液与水性环氧树脂(WEP)共混,得到均一的QCS/水性环氧树脂体系.采用静置实验考察了 QCS对水性环氧树脂体系稳定性的影响.以聚醚胺(PEA)固化WEP-QCS,通过示差扫描量热仪(DSC)分析了 WEP-QCS-PEA体系的固化反应动力学,研究了 QCS对水性环氧树脂固化反应的影响,确定了最优固化工艺为80℃/4h+120℃/2h.采用冲击实验分析了最优条件下固化样品的力学性能.结果表明,QCS/水性环氧树脂体系具有较好的稳定性,QCS的加入使体系反应活化能降低,当QCS质量分数为3％时,WEP-QCS-PEA体系的冲击强度为77.1 kJ/m2,较纯环氧树脂体系WEP-PEA固化物的冲击强度58.4 kJ/m2提高了 32％.
Abstract
The chitosan quaternary ammonium salt(QCS)aqueous solution was mixed with waterborne epoxy resin(WEP)to obtain a homogeneous QCS/waterborne epoxy resin system.The effect of QCS on the stability of waterborne epoxy resin system was investigated by the static experiment.The polyether amine(PEA)was used as the curing agent for WEP-QCS and the curing reaction kinetics of the WEP-QCS-PEA system was analyzed by differential scanning calorimetry(DSC).The effect of QCS on the curing reaction of waterborne epoxy resin was studied,and the optimal curing process was determined to be 80 ℃/4 h+120 ℃/2 h.The mechanical properties of cured samples under optimal conditions were analyzed by impact tests.The results showed that the QCS/waterborne epoxy resin system had good stability,and the reaction activation energy of the system was reduced by the addition of QCS.When the QCS mass fraction was 3％,the impact strength of the WEP-QCS-PEA system was 77.1 kJ/m2,which was 32％higher than the impact strength of the pure epoxy resin system WEP-PEA cured product,which was 58.4 kJ/m2.
关键词
水性环氧树脂/壳聚糖季铵盐/固化反应/冲击强度Key words
waterborne epoxy resin/chitosan quaternary ammonium salt/curing reaction/impact strength引用本文复制引用
基金项目
浙江省自然科学基金重点项目(LZ22C160004)
浙江农林大学2022年校级学生科研训练项目(S202210341077)
出版年
2024
NETL
NSTL
万方数据