双功能改性的T型分子筛膜用于有机溶剂脱水  

Difunctional Effects of Organo-Modified T-Type Zeolite Membranes for Dewatering from Organic Solution

作　　者：崔学 张瑜平 桂田 何明亮 张飞 胡娜 李玉琴 陈祥树 CUI Xue;ZHANG Yu-Ping;GUI Tian;HE Ming-Liang;ZHANG Fei;HU Na;LI Yu-Qin;CHEN Xiang-Shu(Institute of Advanced Materials(IAM),State-Province Joint Engineering Laboratory of Zeolite Membrane Materials,College of Chemistry and Chemical Engineering,Jiangxi Normal University,Nanchang 330022,China)

机构地区：[1]江西师范大学先进材料研究院,分子筛膜材料国家地方联合工程实验室,化学化工学院,南昌330022

出　　处：《无机化学学报》2021年第11期2068-2078,共11页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21766010,21868013,21968009);国家“863”项目(No.2009AA034801,2012AA03A609);江西省自然科学基金(No.20202ACBL213010,20192ACB80003)资助。

摘　　要：将3-氨丙基三乙氧基硅烷(APTES)引入到T型分子筛膜表面,用以修饰多晶膜合成过程中产生的缺陷。X射线衍射、场发射扫描电子显微镜、X射线光电子能谱和FT-IR等方法的表征结果显示,APTES通过“键合”的形式被成功地修饰到膜表面上。APTES层起到2个作用:一是提高膜的亲水性;二是减少膜层的缺陷。将修饰后的膜应用在348 K、90%的异丙醇水溶液的脱水时,该膜表现出比较高的分离因子和通量。该方法重复性良好,5个修饰后的膜样品的选择性平均增加了大约8倍(从359±23增加到2934±183),而渗透通量仅仅从(3.52±0.10)kg·m^(-2)·h^(-1)降低到(3.06±0.14)kg·m^(-2)·h^(-1)(减少13.07%)。在363 K下,修饰的膜经过100 h的连续测试,膜渗透测得的水含量均可达到99.50%以上,表明修饰后的膜性能较稳定。3-aminopropyltriethoxysilane(APTES)was introduced to modify the surface of T-type zeolite membranes.Characterizations,such as X-ray diffraction,field-emission scanning electron microscopy,X-ray photoelectron spec-troscopy and FT-IR,demonstrated that APTES was successfully modified on the membrane surface by chemical bonding.The modified APTES plays two roles:one is to improve the membrane hydrophilicity and the other is to reduce the defects of membrane layer.The modified membranes showed a high separation factor and water flux for the dewatering of a 90%isopropyl alcohol solution at 348 K.This method showed good reproducibility,and five modified membranes demonstrated an increased separation factor by about 8 times(from 359±23 to 2934±183),and a slightly decreased total flux from(3.52±0.10)kg·m^(-2)·h^(-1)to(3.06±0.14)kg·m^(-2)·h^(-1)(a decrease of 13.07%).At 363 K,during 100 h of continuous testing,the modified membrane was very stable,and the permeation side retained a high-water content above 99.50%with a feed solution of 90%isopropyl alcohol.

关 键 词：T型分子筛膜 3-氨丙基三乙氧基硅烷 亲水性 缺陷 

分 类 号：O613.72[理学—无机化学] TQ028.8[理学—化学]