PE基聚硅氧烷/改性SiO_(2)超疏水薄膜的构筑  

Construction of PE-based polysiloxane/modified SiO_(2) superhydrophobic film

作　　者：朱文澄 桂雪峰 李志华 涂园园[1,2,3] 林树东 胡继文[1,2,3] ZHU Wencheng;GUI Xuefeng;LI Zhihua;TU Yuanyuan;LIN Shudong;HU Jiwen(CAS Engineering Laboratory for Special Fine Chemicals,Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics,Guangzhou Institute of Chemistry,Chinese Academy of Sciences,Guangzhou 510650,Guangdong,China;CASH GCC Shaoguan Research Institute of Advanced Materials,Incubator of Nanxiong CAS Co.,Ltd.,Nanxiong 512400,Guangdong,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院广州化学研究所,中国科学院新型特种精细化学品工程实验室,广东省电子有机聚合物材料重点实验室,广东广州510650 [2]国科广化韶关新材料研究院南雄中科院孵化器运营有限公司,广东南雄512400 [3]中国科学院大学,北京100049

出　　处：《精细化工》2021年第10期2050-2056,2116,共8页Fine Chemicals

基　　金：国家自然科学基金(21404121);广州市科技计划重点项目(201904020019)。

摘　　要：使用十八烷基三甲氧基硅烷(OTMS)对纳米SiO_(2)进行表面疏水改性,将得到的改性纳米SiO_(2)(OTMS-SiO_(2))添加到有机硅树脂(SI)中,然后采用两步法在聚乙烯(PE)薄膜表面固化制备了复合涂层SI/OTMS-SiO_(2)。通过FTIR、^(1)HNMR、^(29)SiNMR、TGA对OTMS-SiO_(2)及复合涂层进行了表征,采用接触角测量仪、SEM、AFM对复合涂层疏水特性和形貌进行了测试和观察,最后对复合涂层的耐磨性和附着力进行了分析。结果表明,SiO_(2)表面成功引入了OTMS,且OTMS-SiO_(2)均匀附着在硅树脂涂层上,增加了表面粗糙度,得到了PE基固化超疏水复合涂层。当OTMS-SiO_(2)添加量为正己烷质量的8%时,制得的复合涂层的水接触角为154°,滚动角为7°,并具有良好的耐磨性,其附着力可达4A等级。Octadecyltrimethoxysilane(OTMS) was introduced to hydrophobically modify the surface of nano-silica, then the modified nano-silica(OTMS-SiO_(2)) was added into the silicone resin(SI) as superhydrophobic modifier. Subsequently, SI/OTMS-SiO_(2) functional composite coating was constructed with polyethylene(PE) as substrate by a two-step cure method. OTMS-SiO_(2) and composite coatings were characterized by FTIR, ^(1)HNMR, ^(29)SiNMR and TGA. The hydrophobic properties and morphology of composite coatings were measured and observed by contact angle measuring instrument, SEM and AFM.Finally, the wear resistance and adhesion of composite coatings were analyzed. The results showed that OTMS was successfully introduced onto nano-silica, OTMS-SiO_(2) uniformly loaded onto the coating of silicone resin and increased the surface roughness, as well as the composite coating was obtained. When the addition amount of OTMS-SiO_(2) was 8% of the mass of n-hexane, the performance of the prepared PE-based cured coating acquired a water contact angle of 154° and a roll angle of 7°, and exhibited excellent wear resistance and adhesion reached 4 A level.

关 键 词：超疏水涂层 聚乙烯薄膜 纳米SiO_(2) 有机硅树脂 功能材料 

分 类 号：TB34[一般工业技术—材料科学与工程]