Synthesis and Properties of Modified Fluorosilicone Polymer Composite Antifouling Coating
1. College of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou 310027, China;
2. Inner Mongolia Hengyecheng Organic Silicon Company Limited, Wuhai 016000, China;
3. Institute of Zhejiang University-Quzhou, Quzhou 324000, China
Abstract A quaternary ammonium salt functionalized fluorosilicone polymer (KFQ) was synthesized by free radical telomerization of 3-mercaptopropyl trimethoxysilane (KH590), (perfluorohexane) ethyl methacrylate (C6MA) and methacryloxyethyl dimethyl dodecyl ammonium bromide (QDEMA). The polymer (KFQ) was further grafted to poly (dimethylsiloxane) (PDMS) and formed a thermodynamically driven silicone coating with antifoulant groups enriched on the surface. Surface properties and mechanical properties of the coatings were systematically investigated, and the antifouling performance was studied by pseudobarnacle removal test, antibacterial test and anti-diatom test. The results revealed that the modified coatings showed low surface energy (17.5-24.1 mN/m) and low elastic modulus (1.30-1.50 MPa). The removal strength of adhered pseudobarnacles on the coatings were closed to PDMS (0.40-0.50 MPa). The antifouling test showed that the modified coatings exhibited a good antibacterial properties (99.23% bacterial resistant against E.coli) and a good anti-diatom performance when KFQ addition was 17% mass fraction. The coating shows a good antifouling performance, which can be expected to have potential industry application in marine antifouling field.
