[1]吕永涛,杨雅馨,吝力,等.GO/CNC薄层纳米复合膜的制备及性能研究[J].中国给水排水,2024,40(11):65-72.
　LüYong-tao,YANGYa-xin,LINLi,et al.Preparation of GO/CNC Thin Film Nanocomposite Membrane and Its Properties[J].China Water & Wastewater,2024,40(11):65-72.
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GO/CNC薄层纳米复合膜的制备及性能研究

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第40卷 期数: 2024年第11期 页码: 65-72 栏目: 出版日期: 2024-06-01
Title:
Preparation of GO/CNC Thin Film Nanocomposite Membrane and Its Properties
作者:
吕永涛1,2， 杨雅馨1,2， 吝力1,2， 潘永宝3， 崔双科3， 王磊1,2
（1.西安建筑科技大学 环境与市政工程学院，陕西 西安 710055；2.陕西省膜分离技术研究院 陕西省膜分离重点实验室，陕西 西安 710055；3.陕西省现代建筑设计研究院有限公司，陕西 西安 710021）
Author(s):
Lü　Yong-tao1，2， YANG　Ya-xin1，2， LIN　Li1，2， PAN　Yong-bao3， CUI　Shuang-ke3， WANG　Lei1，2
（1. School of Environmental and Municipal Engineering， Xi’an University of Architecture and Technology， Xi’an 710055， China； 2. Key Laboratory of Membrane Separation of Shaanxi Province， Research Institute of Membrane Separation Technology of Shaanxi Province， Xi’an 710055， China； 3. Shaanxi Modern Architecture Design & Research Institute Co. Ltd.， Xi’an 710021， China）
关键词:
氧化石墨烯;  纤维素纳米晶;  纳滤膜;  界面聚合;  耐氯性
Keywords:
graphene oxide;  cellulose nanocrystal;  nanofiltration membrane;  interface polymerization;  chlorine resistance
摘要:
为改善纳滤膜的性能，利用纤维素纳米晶（CNC）修饰氧化石墨烯（GO），合成了具有良好分散性的GO/CNC复合纳米材料，之后通过界面聚合引入聚酰胺（PA）层中制得改性纳滤膜，并进行形貌结构表征和性能测试。研究发现，GO/CNC改性膜表面具有更明显的凸起褶皱结构、更高的粗糙度及亲水性，在0.6 MPa下纯水通量可达38.45 L/（m2·h），较PA原膜与GO改性膜分别提升了84.86%和53.92%，Na2SO4和NaCl截留率分别为95.47%和6.65%。经pH=4、4 000 mg/L的NaClO溶液浸泡4 h后，PA原膜的归一化纯水通量增加了近50%，归一化Na2SO4截留率降至0.89，而GO/CNC改性膜的归一化纯水通量仅增加了13%，Na2SO4截留率几乎无影响。上述结果表明，GO/CNC的添加可显著提升复合纳滤膜的渗透通量，同时具有良好的Na2SO4/NaCl分离选择性与耐氯性能。
Abstract:
This paper synthesized GO/CNC nanocomposite with good dispersion by modifying graphene oxide (GO) with cellulose nanocrystals (CNC), introduced the GO/CNC nanocomposite into the polyamide (PA) layer via interfacial polymerization to prepare modified nanofiltration membranes, and characterized the morphology and structure and tested the characteristics of the modified membrane, so as to improve the performance of the nanofiltration membranes. The surface of GO/CNC modified membrane had a more obvious convex fold structure, higher roughness and hydrophilicity. Its pure water flux reached 38.45 L/(m2·h) at 0.6 MPa, which was 84.86% and 53.92% higher than that of PA membrane and GO modified membrane, respectively. Its rejection rates of Na2SO4 and NaCl were 95.47% and 6.65%, respectively. After soaking in NaClO solution with concentration of 4 000 mg/L (pH=4) for 4 h, the normalized pure water flux of the PA membrane increased by nearly 50%, accompanied with a decrease of the normalized Na2SO4 rejection from 1.00 to 0.89. In contrast, the normalized pure water flux of the GO/CNC modified membrane only increased by 13%, and the Na2SO4 rejection was almost unaffected. The addition of GO/CNC significantly enhanced the permeate flux of the composite nanofiltration membrane, and exhibited good Na2SO4/NaCl separation selectivity and chlorine resistance.

相似文献/References:

[1]蒋宝军,刘卓驿,郭昊程,等.TiO2、Cu2O和氧化石墨烯复合氧化垃圾渗滤液效能[J].中国给水排水,2021,37(5):86.
　JIANG Bao-jun,LIU Zhuo-yi,GUO Hao-cheng,et al.Combined Oxidation Efficiency of Landfill Leachate by TiO2, Cu2O and Graphene Oxide[J].China Water & Wastewater,2021,37(11):86.

更新日期/Last Update: 2024-06-01