固化剂和硅烷偶联剂对有机硅涂层性能的影响  

Influence of Curing Agent and Silane Coupling Agent on the Properties of Silicone Coatings

作　　者：刘福杰[1] 齐育红[1] 张占平[1] 

机构地区：[1]大连海事大学船机修造工程实验室,辽宁大连116026

出　　处：《中国表面工程》2014年第1期114-119,共6页China Surface Engineering

基　　金：国家自然科学基金(51079011;51179018);交通运输部应用基础研究(2013329225330);总装预研基金(861208);大连海事大学船机修造工程交通行业重点实验室开放课题(CJXZ201304);大连海事大学优秀科技创新团队培育计划(3132013313)

摘　　要：通过控制有机硅涂料配方中固化剂和硅烷偶联剂的含量,研究它们对涂层材料的弹性模量、硬度、疏水性,以及吸水率和耐水介质浸泡性能的影响。结果表明,当固化剂含量大于4%后,随着固化剂含量的增加,涂层的弹性模量降低,邵氏硬度增加,吸水率增大;硅烷偶联剂含量的增加,有机硅涂层的弹性模量和吸水率随之增大,而邵氏硬度和水接触角减小。固化剂添加6%时涂层的弹性模量对海水浸泡最为敏感。含5%固化剂和8%硅烷偶联剂含量的有机硅涂层在海水中的稳定性明显降低。过高的固化剂添加量会导致硅氧链的交联程度增加,网状结构变密,增加涂层的硬度,不利于涂层的防污性能;过高的硅烷偶联剂添加量会导致涂层表面的亲水基团增多,水接触角降低,海洋细菌附着增加。Controlling the content of curing agent and silane coupling agent in the silicone formula, the effects of curing agent and silane coupling agent on the elastic modulus, hardness, hydrophobicity, water absorption rate and resistance to water immersion were investigated for silicone coatings. The results show that the elastic modulus of the coating decreases, and shore hardness and water absorption increase with increasing curing agent when its content is more than 4%. The elastic modulus and water absorption of the silicone coating decrease, however, shore hardness and water contact angle decrease with the increase of the content of silane coupling agent. The elastic modulus of the coating with the curing agent of 6% is the most sensitive to seawater immersion. The stability of the silicone coating is significantly reduced by seawater immersion for the coating with the curing agent of 5% and silane coupling agent of 8%. Too much curing agent leads to the increase of the crosslinked degree of siliconoxygen chains, density of mesh structures, coating hardness, and the reduce of antifouling performance. Too much silane coupling agent leads to the increase of the hydrophilicgroup of the surface, the decreaseof the water contact angle, and the increase of marine bacterial attachment.

关 键 词：有机硅 固化剂 硅烷偶联剂 性能 

分 类 号：TG174.46[金属学及工艺—金属表面处理] TQ317[金属学及工艺—金属学]