文献类型：期刊文献

英文题名：Enhancing corrosion and abrasion resistances simultaneously of epoxy resin coatings by novel hyperbranched amino-polysiloxanes

作者：Wang, Keying[1];Wang, Caiyun[1];Dong, Qiang[1];Wang, Kaili[1];Qian, Jianhua[2];Liu, Zuozhen[2];Huang, Farong[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Huachang Polymers Co Ltd, Shanghai 200241, Peoples R China

年份：2024

卷号：196

外文期刊名：PROGRESS IN ORGANIC COATINGS

收录：;EI(收录号：20243016765696);WOS:【SCI-EXPANDED(收录号:WOS:001283375000001)】；

基金：The authors gratefully acknowledge the support of the National Key R & D Program of China (No. 2022YFB3709201) , Shanghai Special Funds for Collaborative Innovation (HCXBCY-2024-017) and the Fundamental Research Funds for the Central Universities (No. JKD01241701) .

语种：英文

外文关键词：Epoxy resin coating; Amino-polysiloxane; Hyperbranched polymer; Mechanical properties; Corrosion-resistant coating

摘要：Hyperbranched and linear amino-polysiloxanes with different functional groups were synthesized from trifunctional, difunctional and amino siloxanes and characterized. The amino-polysiloxanes as curing agents were used for hydrogenated diglycidyl ether of bisphenol A coatings. The effects of amino-polysiloxanes with different functional groups and different branching degrees on the surface properties, mechanical properties, corrosion resistance and thermal properties of the epoxy resin coatings were investigated. The epoxy coatings with hyperbranched amino-polysiloxanes exhibit better reactivity, higher hardness, better wear and corrosion resistance, and higher thermal properties as compared to that with the linear amino-polysiloxane. The coatings with the hyperbranching polysiloxanes can maintain lowest-frequency impedance (|Z|f=0.01Hz) above 108 Omega & sdot;cm2 after 30 days of the corrosion test, while coating with the linear polysiloxane only 107 Omega & sdot;cm2. Moreover, due to the introduction of trifluoropropyl, the fluorinated hyperbranched polysiloxane/epoxy resin coating (HBPSi-2Ph2F/ EP coating) has the highest |Z|f=0.01Hz, up to 4.26 x 109 Omega & sdot;cm2. The hyperbranched amino-polysiloxanes as curing agents for epoxy resins would be expected to find wide applications in high performance coatings.