玻璃表面碱催化甲基含氢硅油制备超疏水涂层的研究  

Preparation of superhydrophobic coating on glass surface with alkali catalyzed polymethylhydrosiloxane

作　　者：庞筱琴 方洲 贺艳[1,2] 崔学民 PANG Xiao-qin;FANG Zhou;HE Yan;CUI Xue-min(School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China;Guangxi Key Lab of Petrochemical Resource Processing and Process Intensification Technology,Nanning 530004,China)

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]广西石化资源加工及过程强化技术重点实验室,广西南宁530004

出　　处：《现代化工》2021年第8期86-90,95,共6页Modern Chemical Industry

基　　金：国家自然科学基金资助项目(51772055,21566006)。

摘　　要：用浓度1、5、10 mol/L的KOH活化玻璃表面,通过碱催化甲基含氢硅油(PMHS)的水解和缩合反应,在玻璃表面构建出具有自洁功能的超疏水涂层。通过SEM观察发现,在浓度为10 mol/L KOH、120℃条件下改性2 h的超疏水涂层性能最佳。利用FT-IR、XPS、SEM、EDS对PMHS进行表征,结果表明,OH^(-)不仅能破坏玻璃的晶格使表面暴露出活性—OH位点,还能催化PMHS分子水解生成大量活性—Si—OH;2种活性基团发生化学缩合将PMHS单体接枝到玻璃表面,随后PMHS单体自交联形成微-纳纤维涂层。该方法所制超疏水界面接触角高达168°,透光率为91%,具有很强的耐酸、耐磨和自清洁性能。A superhydrophobic coating with self-cleaning function is prepared by activating glass surface with KOH concentration of 1 mol·L^(-1),5 mol·L^(-1)and 10 mol·L^(-1),respectively,and through alkali catalyzed hydrolysis and condensation of polymethylhydrosiloxane(PMHS).It is found through SEM observation that the superhydrophobic coating has the best performance when the modification has been carried out under a KOH concentration of 10 mol·L^(-1)at 120℃for 2 h.The reaction mechanism of PMHS is analyzed by FT-IR,XPS,SEM,and EDS.It is shown that OH^(-)can destroy the crystal lattice of glass to expose active-OH sites on the surface,and can catalyze the hydrolysis of PMHS molecules to generate a large number of active-Si-OH.Chemical condensation undergoes between these two active groups to graft PMHS monomer onto glass surface,and then PMHS monomers self-polymerize to form micro-nano fiber coating.The superhydrophobic interface prepared by this method has a contact angle of 168°and a light transmittance of91%,which has strong acid resistance,wear resistance and self-cleaning properties.

关 键 词：玻璃 超疏水 碱催化 甲基含氢硅油 

分 类 号：TB306[一般工业技术—材料科学与工程]