改性SiO_(2)凝胶涂层滤料制备与性能  

Preparation and performance of modified SiO_(2) gel coating filter material

作　　者：李晴 钱付平[1] 薛沚怡 董伟[1] 韩云龙[1] 鲁进利[1] LI Qing;QIAN Fuping;XUE Zhiyi;DONG Wei;HAN Yunlong;LU Jinli(School of Architecture and Civil Engineering,Anhui University of Technology,Ma’anshan 243032,China)

机构地区：[1]安徽工业大学建筑工程学院,马鞍山243032

出　　处：《复合材料学报》2021年第8期2489-2496,共8页Acta Materiae Compositae Sinica

基　　金：安徽省科技重大专项(18030801109)。

摘　　要：从滤料表面改性的角度对提高滤料在高湿环境中运行的稳定性进行研究。以聚对苯二甲酸乙二醇酯(PET)滤料为基材、正硅酸乙酯(TEOS)为前驱体、甲基三乙氧基硅烷(MTES)为低表面能物质,采用溶胶-凝胶法,在滤料表面原位生成SiO_(2)纳米粒子,制备改性SiO_(2)凝胶涂层滤料。采用FESEM-EDS、FTIR和接触角测量仪分析了PET滤料表面化学成分、润湿性能及表面形貌的变化。结果表明:整理后PET滤料表面生成SiO_(2)纳米粒子,经MTES改性处理后滤料表面布满疏水的甲基基团,滤料疏水性能显著提高,其表面水接触角达154.11°。SiO_(2)颗粒在滤料表面均匀分布,凝胶聚合物仅在纤维交叉处沉积,使滤料透气性得以保证,过滤效率由97.0595%增加到99.2028%,过滤品质因数由0.02124增加到0.02761,提升了30%。In this paper,from the perspective of surface modification of filter material,how to improve its stability in high humidity environment has been studied.Using polyethylene terephthalate(PET)filter material as the substrate,ethyl orthosilicate(TEOS)as the precursor,and methyltriethoxysilane(MTES)as the low surface energy substance,the sol-gel method was used to generate in-situ on the surface of the filter material SiO_(2) nanoparticles to prepare modified SiO_(2) gel-coated filter material.Then,FESEM-EDS,FTIR and a contact angle measuring instrument were used to analyze the changes in the surface chemical composition,wettability and surface morphology of the PET filter material.The results show that SiO_(2) nanoparticles are formed on the surface after finishing,and the surface is covered with hydrophobic methyl groups after MTES modification treatment.Thus,its hydrophobic property is significantly improved,and its surface water contact angle reaches 154.11°.At the same time,the SiO_(2) particles are evenly distributed on the surface,and the gel polymer is only deposited at the intersection of the fibers,which ensures air permeability,and the filtration efficiency increases from 97.0595% to 99.2028%,and the filtration quality factor increases by 30%,from 0.02124 to 0.02761.

关 键 词：聚对苯二甲酸乙二醇酯(PET)纤维滤料 超疏水特性 过滤性能 高湿黏性颗粒 溶胶-凝胶法 

分 类 号：TB322[一般工业技术—材料科学与工程]