SiO_(2)@GO杂化膜的制备及其渗透汽化脱盐性能研究  

Preparation and pervaporation desalination performance of SiO_(2)@GO hybrid membranes

作　　者：展侠[1] 杨雨均 聂明雪 高仲勇 Zhan Xia;Yang Yujun;Nie Mingxue;Gao Zhongyong(Beijing Technology and Business University,Beijing 100048)

机构地区：[1]北京工商大学,北京100048

出　　处：《化工新型材料》2024年第7期93-97,103,共6页New Chemical Materials

基　　金：北京市自然科学基金委-北京市教委联合资助项目(KZ201910011012)。

摘　　要：以渗透汽化膜法脱盐为研究背景,针对目前氧化石墨烯膜(GOM)易溶胀、稳定性差和渗透通量衰减等缺点,采用疏水、亲水、原位合成方法制备了3种纳米二氧化硅(SiO_(2))对GOM进行插层修饰,进而制备SiO_(2)@氧化石墨烯(SiO_(2)@GO)膜。通过傅里叶红外变换光谱仪(FT-IR)、扫描电子显微镜(SEM)、X射线衍射仪(XRD)、接触角测量仪等方法表征其化学组分、形貌、晶体结构和亲水性。渗透汽化脱盐实验表明,疏水性SiO_(2)@GO杂化膜脱盐性能优于亲水性SiO_(2)@GO和原位制备SiO_(2)@GO膜,且当SiO_(2)与GO质量比为0.2时,疏水性SiO_(2)@GO杂化膜水通量可达103.4kg/(m^(2)·h),盐截留率为99.8%(70℃,3.5%NaCl溶液),在连续12h测试中分离性能保持稳定,表明疏水性SiO_(2)@GO杂化膜在渗透汽化脱盐领域有着广阔的应用前景。Based on the background of desalination via pervaporation,in response to the current drawbacks of graphene oxide membranes(GOM)such as easy swelling,poor stability,and decreased permeation flux,the hydrophilic,hydrophobic and in-situ synthesis methods were used to prepare three kinds of nano-silica(SiO_(2))for the intercalation modification of GOM,thereby preparing SiO_(2)@GO hybrid membranes.The chemical composition,morphology,crystal structure and hydrophilicity were characterized by Fourier transform infrared spectroscopy(FT-IR),scanning electron microscopy(SEM),X-ray diffraction(XRD)and contact angle measurement.Pervaporation desalination experiments showed that the hydrophobic SiO_(2)@GO hybrid membrane exhibited superior desalination performance compared to the hydrophilic SiO_(2)@GO and in-situ prepared SiO_(2)@GO hybrid membranes.As the mass ratio of SiO_(2) to GO was 0.2,the permeation flux of the hydrophobic SiO_(2)@GO hybrid membrane reached 103.4kg/(m^(2)·h),with a salt rejection rate of 99.8%(70℃,3.5wt%NaCl solution).The separation performance remained stable during continuous 12-hour test,indicating that the hydrophobic SiO_(2)@GO hybrid membrane had broad application prospects in the field of pervaporation desalination.

关 键 词：二氧化硅 氧化石墨烯 杂化膜 渗透汽化 脱盐 

分 类 号：TQ028.8[化学工程]