碳纳米管改性复合纳滤膜的制备及性能研究

欧阳果仔, 李新冬, 张鑫, 李海柯, 李浪, 梁娟, 黄万抚

doi:10.19817/j.cnki.issn 1006-3536.2021.08.020

化工新型材料 >

2021 , Vol. 49 >Issue 8: 93 - 100

DOI: https://doi.org/10.19817/j.cnki.issn 1006-3536.2021.08.020

新材料与新技术

碳纳米管改性复合纳滤膜的制备及性能研究

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1.江西理工大学赣江流域水质安全保障工程技术研究中心,赣州341000;
2.江西理工大学土木与测绘工程学院,赣州341000;
3.江西理工大学资源与环境工程学院,赣州341000

欧阳果仔(1995-),男,硕士研究生,主要从事膜分离技术研究。

收稿日期: 2020-09-27

修回日期: 2021-08-21

网络出版日期: 2021-09-07

基金资助

江西省教育厅科技项目(GJJ160619);国家级大学生创新创业训练项目(201910407009)

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Preparation and property of CNT modified composite nanofiltration membrane

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1. Research Center for Water Quality Security Technology at Ganjiang River Basin,Jiangxi University of Science and Technology,Ganzhou 341000;
2. School of Civil and Surveying ＆ Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341000;
3. School of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000

Received date: 2020-09-27

Revised date: 2021-08-21

Online published: 2021-09-07

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摘要

为获得分离性能良好的复合纳滤膜,利用无机纳米颗粒碳纳米管(CNT)对纳滤膜进行改性,并在传统界面聚合反应的基础上增加了水相反应次数。以哌嗪(PIP)、均苯三甲酰氯(TMC)为反应单体,CNT为水相添加剂,磷酸钠(Na₃PO₄)为酸接收剂,聚砜(PSF)超滤膜作为支撑层成功制备了CNT改性复合纳滤膜。利用正交试验较系统地得到了改性纳滤膜的最佳制备条件:第一次水相、有机相、第二次水相、热处理的反应时间分别为2.0min、1.0min、1.0min、10min,Na₃PO₄、PIP、TMC、CNT添加量分别为1.5%(质量分数,下同)、1.0%、0.25%、2.0%。在此条件下复合纳滤膜0.6MPa压力下纯水通量为35.35L/(m²·h),对MgSO₄的截留率为94.1%,膜的亲水性能得到大幅度提高。

关键词： 碳纳米管; 改性; 界面聚合; 纳滤; 优化; 正交试验

本文引用格式

欧阳果仔, 李新冬, 张鑫, 李海柯, 李浪, 梁娟, 黄万抚 . 碳纳米管改性复合纳滤膜的制备及性能研究[J]. 化工新型材料, 2021 , 49(8) : 93 -100 . DOI: 10.19817/j.cnki.issn 1006-3536.2021.08.020

Abstract

In order to obtain a composite nanofiltration membrane with good separation performance,the inorganic nanoparticle carbon nanotubes (CNT) were used to modify the nanofiltration membrane,and the number of aqueous phase reactions was increased on the basis of traditional interfacial polymerization (IP) reaction.Piperazine (PIP) and trimesoyl chloride (TMC) were used as the reactive monomer,CNT as the additive of water phase,and sodium phosphate (Na₃PO₄) as acid acceptor,and polysulfone (PSF) ultrafiltration membrane was used as support layer to prepare CNT modified composite NF membrane successfully.The best preparation conditions were obtained systematically as follows by using orthogonal experiments:the reaction time of the first aqueous phase,organic phase,second aqueous phase,and heat treatment were 2.0min,1.0min,1.0min snd 10min,respectively.The amount of Na₃PO₄,PIP,TMC and CNT addition were 1.5%,1.0%,0.25%,and 2.0%,respectively.The pure water flux of the membrane reached 35.35L/(m²·h),and the rejection for magnesium sulfate was 94.1%.At the same time,the hydrophilic properties of the membrane were improved greatly.

Key words： CNT; modification; interfacial polymerization; nanofiltration; optimization; orthogonal experiment

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