模板法制备多孔超疏水SiO2/PDMS海绵及油水分离应用
Preparation of porous superhydrophobic SiO2/PDMS sponge by template method and application of oil water separation
刘君仪 1冯庆革 2陈考 3李想 4覃方红 4黄潇潇 1冯淋1
作者信息
- 1. 广西大学资源环境与材料学院,广西南宁 530004
- 2. 广西大学资源环境与材料学院,广西南宁 530004;省部共建特色金属材料与组合结构全寿命安全国家重点实验室,广西南宁 530004
- 3. 广西民族大学材料与环境学院,广西高校环境友好材料及生态修复重点实验室,广西先进结构材料与碳中和重点实验室,广西南宁 530006;广西大学土木建筑工程学院,广西南宁 530004
- 4. 广西大学土木建筑工程学院,广西南宁 530004
- 折叠
摘要
以水玻璃为硅源,采用溶胶-凝胶法制备了超疏水二氧化硅(SiO2)气凝胶,将超疏水SiO2气凝胶与聚二甲基硅氧烷(PDMS)均匀混合,并引入蔗糖和葡萄糖作为模板制备了超疏水SiO2/PDMS海绵.通过扫描电子显微镜(SEM)、X射线衍射仪(XRD)、傅里叶变换红外光谱仪(FT-IR)等对其微观形貌和成分进行表征;利用接触角测量仪表征其润湿性能.同时,以油水混合物为模型污染物,研究了SiO2气凝胶掺量及糖的比例对海绵吸附性能的影响.结果表明:制备的SiO2/PDMS海绵具有超疏水亲油性,水接触角(WCA)高达152.1°,且在模拟油水吸附实验中具有良好的去除效果;对植物油和泵油的去除率分别为98%和95%,且经过20次的重复油水分离实验后,SiO2/PDMS海绵的吸附容量和接触角均未发生明显变化,仍具有较好的疏水性能.
Abstract
Superhydrophobic SiO2 aerogel was prepared by sol-gel method using water glass as silicon source.The superhy-drophobic SiO2 aerogel gel was uniformly mixed with polydimethylsiloxane(PDMS),sucrose and glucose were introduced as templates to prepare superhydrophobic SiO2/PDMS sponge.The microstructure and composition were characterized by scan-ning electron microscopy(SEM),X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR),etc.Its wetting performance was characterized by contact angle measuring instrument.With oil-water mixture as model pollutant,the ef-fects of SiO2 aerogel content and sugar proportion on adsorption properties of sponge were studied.The results showed that the SiO2/PDMS sponge had superhydrophobic and lipophilic properties,with a water contact angle(WCA)of 152.1°.It re-vealed good removal effect in simulated oil-water adsorption experiments,with removal rate of 98%and 95%for vegetable oil and pump oil,respectively.After oil-water separation experiments repeated for 20 times,adsorption capacity and contact angle of SiO2/PDMS sponge did not change significantly,and still showed good hydrophobic performance.
关键词
二氧化硅气凝胶/聚二甲基硅氧烷/海绵/模板法/油水分离Key words
SiO2 aerogels/PDMS/sponge/template method/oil-water separation引用本文复制引用
基金项目
国家重点研发计划项目(2018YFC1903201)
广西高校环境友好材料及碳中和新技术重点实验室开放课题项目(GXEMNTCN23-3)
出版年
2024
NETL
NSTL
万方数据