摘要
通过简易方法构建超疏水表面,以提高膜材料的疏水性和油水分离性能。以聚对苯二甲酸乙二醇酯(PET)无纺布为基底,以正辛基三乙氧基硅烷(NOEO)为改性剂,采用溶胶凝胶法在PET表面原位生长疏水二氧化硅(SiO2)颗粒,一步制备PET-SiO2-NOEO超疏水膜。结果表明:PET无纺布表面生长了疏水SiO2颗粒,PET无纺布的表面形貌发生了变化,PET无纺布的疏水性能得以改善,处理后无纺布的水接触角为161.9°,且热稳定性有一定程度的提升;将PET-SiO2-NOEO超疏水膜在pH 3~12、盐浓度5~45 g/L的含油污水(模拟)中浸泡24 h,水接触角仍保持在150°以上;PET-SiO2-NOEO超疏水膜的油水分离效率为97%以上,表明PET-SiO2-NOEO超疏水膜具备用于舱底水油水分离过程的应用潜力。
Superhydrophobic surface was constructed by a simple method to improve the hydrophobicity and oil-water separation properties of the membrane material. PET-SiO2-NOEO superhydrophobic membrane was prepared in one step by growing hydrophobic nano-SiO2 particles on the polyethylene terephthalate(PET) non-woven fabric surface via sol-gel method, and using n-octyltriethoxysilane(NOEO) as a modifier. The results showed that hydrophobic SiO2 particles grew on the surface of PET, the surface morphology of PET was changed and the hydrophobic properties of PET non-woven fabric was improved. After the treatment, the water contact angle of the non-woven fabric was 161.9°, and the thermal stability of PET increased to certain degree. PET-SiO2-NOEO superhydrophobic membrane was soaked for 24 h in oily sewage(simulated) with a pH of 3~12 and a salt concentration of 5~45 g/L, and the water contact angle of PET-SiO2-NOEO superhydrophobic membrane remained above 150°. The oil-water separation efficiency of the membrane was above 97%, indicating that PET-SiO2-NOEO superhydrophobic membrane has the application potential for bilge water-oil separation process.
作者
陈艳霞
徐素芹
鲁慧娟
刘胜
张勇
CHEN Yanxia;XU Suqin;LU Huijuan;LIU sheng;ZHANG Yong(School of Materials Science and Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China;College of Sciences,Beijing Forestry University,Beijing 100083,China;State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,China)
出处
《浙江理工大学学报（自然科学版）》
2020年第3期293-300,共8页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
基金
国家自然科学基金项目(61571002)
浙江省公益技术应用研究项目(2017C31034)
浙江省基础公益研究计划项目(LGF18C160002)
制浆造纸工程国家重点实验室开放基金项目(201758)。
关键词
PET
SIO2
超疏水膜
无纺布
油水分离
PET
SiO2
superhydrophobic membrane
non-woven fabric
oil-water separation
