摘要
以生漆为原料,先采用γ-氨乙基氨丙基三甲氧基硅烷(AATMS)与漆酚的酚羟基发生醇解反应,再通过AATMS的氨基与环氧桐油的环氧基发生开环反应,得到了一种复合涂料。该涂料的干燥成膜过程是在漆酶作用下,通过空气自氧化聚合得到高度交联的聚合膜。固定AATMS用量为生漆质量分数10%不变,讨论了环氧桐油用量对生漆的物理机械性能的影响,结果发现环氧桐油用量为生漆质量分数的30%时,漆膜的性能最佳,柔韧性、耐冲击性、硬度、附着力分别提高到2mm、40kg·cm^-1、6H和1级。利用红外光谱分析(FT-IR)证实了复合涂膜的结构。利用热分析(TG-DTG)研究了复合涂膜和生漆涂膜的热稳定性,结果表明复合涂膜比生漆涂膜的热稳定性高。研究测试了复合涂膜和生漆涂膜的耐溶剂性能、耐化学介质性能和耐老化性能,结果表明复合涂料的漆膜比生漆涂膜性能都大幅提升。
A kind of composite coating was obtained by using raw lacquer as material,Gamma-ammonia ethyl aminopropyl trimethoxysilane(AATMS)to react with the phenolic hydroxyl of laccase,and then opening the ring reaction between the amino of AATMS and the epoxy of paulown-oil.A highly crosslinked polymer film was prepared by air autooxidation polymerization under the action of laccase.Effect of the amount of epoxidized tung oil on the Physico-mechanical properties of paint film under the amount of fixed AATMS is 10%of the quality of raw paint,the results showed that when the amount of epoxidized tung oil was 30%of the raw paint quality,paint film had the best performance.Its flexibility,impact resistance,hardness and adhesion are improved to 2mm,40kg·cm^-1,6H and level 1 respectively.The structure of the composite film was confirmed by ft-ir.The thermal stability of composite film and raw lacquer film was studied by thermal analysis(TG-DTG),the results show that the thermal stability of the composite film is higher than that of raw lacquer film.The solvent resistance,chemical resistance and aging resistance of the composite coating film and the raw coating film were studied and tested,the results show that the performance of the composite coating film is much better than that of raw lacquer film.
作者
吕虎强
刘帅
李东旭
LV Hu-qiang;LIU Shuai;LI Dong-xu(Xi’an Research Institute of Chinese Lacquer Under All China Federation of Supply and Marketing Cooperatives,ShanXi Xi’an 710061,China)
出处
《化学研究与应用》
CAS
CSCD
北大核心
2019年第9期1695-1701,共7页
Chemical Research and Application
基金
陕西省科技资源开放共享平台项目(2016FWPT-03)资助
关键词
生漆
氨基硅氧烷
环氧桐油
制备
性能
Raw lacquer
Aminosiloxane
Epoxidized tung oil
Preparation
Property.
