[1]杨胜,孟晓荣,陈嘉智,等.超亲水PVDF@C-TA@CaCO3膜制备及油水分离性能[J].中国给水排水,2022,38(15):14-20.
　YANGSheng,MENGXiao-rong,CHENJia-zhi,et al.Preparation of Superhydrophilic PVDF@C-TA@CaCO3 Membrane and Its Oil?water Separation Performance[J].China Water & Wastewater,2022,38(15):14-20.
点击复制

超亲水PVDF@C-TA@CaCO3膜制备及油水分离性能

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第38卷 期数: 2022年第15期 页码: 14-20 栏目: 出版日期: 2022-08-01
Title:
Preparation of Superhydrophilic PVDF@C-TA@CaCO3 Membrane and Its Oil?water Separation Performance
作者:
杨胜1， 孟晓荣1,2， 陈嘉智1， 朱俊锋1， 王旭东2,3
（1.西安建筑科技大学 化学与化工学院，陕西 西安 710055；2.陕西省膜分离技术研究院，陕西 西安 710055；3.西安建筑科技大学 环境与市政工程学院，陕西 西安 710055）
Author(s):
YANG　Sheng1， MENG　Xiao-rong1，2， CHEN　Jia-zhi1， ZHU　Jun-feng1， WANG　Xu-dong2，3
（1. School of Chemistry and Chemical Engineering， Xi’an University of Architecture and Technology， Xi’an 710055， China； 2. Shaanxi Membrane Separation Technology Research Institute， Xi’an 710055， China； 3. School of Environmental and Municipal Engineering， Xi’an University of Architecture and Technology， Xi’an 710055， China）
Keywords:
polyvinylidene fluoride (PVDF) microfiltration membrane;  superhydrophilicity;  biomimetic mineralization;  calcium carbonate (CaCO3);  emulsified oil-water separation
摘要:
采用仿生矿化法在羧基化单宁酸修饰的聚偏氟乙烯（PVDF）微滤膜表面沉积CaCO3颗粒，制备了超亲水性PVDF@C-TA@CaCO3膜。以水接触角和纯水通量为指标，考察矿化液（CaCl2和Na2CO3溶液）浓度和交替浸渍次数对PVDF@C-TA@CaCO3膜的影响。结果表明，随着矿化液浓度和交替浸渍次数的增加，PVDF@C-TA@CaCO3膜的水接触角逐渐下降，纯水通量先上升后下降。当矿化液浓度为0.15 mol/L、交替浸渍次数为10次时，PVDF@C-TA@CaCO3膜的纯水通量达到最高即5 750 L/（m2·h），水接触角降为10°。PVDF@C-TA@CaCO3膜对植物油、环己烷和石油醚乳化液的截留率分别为90.5%、93.3%和91.5%，通量恢复率分别为88.5%、94.4%和95.5%，显示出良好的乳化油水分离性能。
Abstract:
Biomimetic mineralization method was employed to deposit CaCO3 particles on the surface of carboxylated tannic acid modified polyvinylidene fluoride (PVDF) microfiltration membrane to prepare superhydrophilic PVDF@C-TA@CaCO3 membrane. The effects of concentration of mineralized solution (CaCl2?and Na2CO3 solutions) and alternate impregnation times on PVDF@C-TA@CaCO3 membrane were investigated by using water contact angle and pure water flux as evaluation indexes. With the increase of the concentration of mineralized solution and the number of alternate impregnation, the water contact angle of PVDF@C-TA@CaCO3 membrane decreased gradually, and the pure water flux increased first and then decreased. When the concentration of mineralized solution was 0.15 mol/L and alternate impregnation for 10 times, the pure water flux of PVDF@C-TA@CaCO3 membrane reached the maximum of 5 750 L/(m2·h), and the water contact angle decreased to 10°. The retention rates of PVDF@C-TA@CaCO3 membrane to vegetable oil, cyclohexane and petroleum ether emulsion were 90.5%, 93.3% and 91.5%, respectively, and the flux recovery rates were 88.5%, 94.4% and 95.5%, respectively, showing good separation performance of oil-water mixture.
更新日期/Last Update: 2022-08-01