采用羟烷基封端的聚硅氧烷改性含硅嵌段共聚物,加入甲基丙烯酸羟乙酯(HEMA)封端,通过点击化学反应将硅氧烷接入端基,合成一系列不同分布方式的有机硅改性乳液和涂层。利用FT-IR、SEM、XPS研究了复合涂层的结构和形貌,利用激光粒度仪、静态水接触角和万能试验机对制备的涂层耐水性和力学性能进行了表征。结果表明,设计的复合结构引入了更多的有机硅,有利于形成交联网络,进一步降低了表面自由能,提高涂层表面的疏水性,产生的微相分离结构形成了更高交联密度,表现出更好的力学性能。
A series of silicone modified emulsions and coatings with different distribution modes were synthesized by using hydroxyalkyl capped polysiloxane modified silicone containing block copolymers,adding hydroxyethyl methacrylate (HEMA) capping,and accessing the silicone to the end groups by click chemistry.The structure and morphology of the composite coatings were studied by IR,SEM and XPS,and the water resistance and mechanical properties of the prepared coatings were characterized by using laser particle size meter,static water contact angle and universal testing machine.The results showed that the designed composite structure introduced more silicone,which facilitated the formation of cross-linked network,further reduced the surface free energy,improved the hydrophobicity of the coating surface,and produced a microphase separation structure to form a higher cross-link density and exhibit better mechanical properties.
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