单一纳米颗粒及其协同改性聚偏氟乙烯膜的性能

详细信息    查看全文 | 推荐本文 |

英文篇名：Properties of Single Nanoparticle and Synergistic Modification of PVDF Membrane 作者：熊娟 ; 周瞾 ; 高贻钧 ; 左行涛 英文作者：XIONG Juan;ZHOU Zhao;GAO Yijun;ZUO Xingtao;College of Science, Huazhong Agricultural University;Zhuhai GREE Electric Limited Co.;College of Resources and Environment, Huazhong Agricultural University; 关键词：PVDF ; 纳米Al_2O_3 ; 纳米SiO_2 ; 渗透性能 ; 抗污染性 英文关键词：PVDF;;nano-Al_2O_3;;nano-SiO_2;;separation property;;antifouling capacity 中文刊名：环境科学与技术 英文刊名：Environmental Science & Technology 机构：华中农业大学理学院;珠海格力电器股份有限公司;华中农业大学资源与环境学院; 出版日期：2019-04-15 出版单位：环境科学与技术 年：2019 期：04 基金：中央高校基本科研业务费专项基金(2662018JC013,2662017JC019);; 湖北省自然科学基金面上项目(2016CFB495);; 国家自然科学基金(11247304) 语种：中文; 页：132-135+146 页数：5 CN：42-1245/X ISSN：1003-6504 分类号：TQ051.893;TB383.1

摘要

为了提升PVDF膜的分离性能和抗污染能力,制备了纳米Al_2O_3和SiO_2颗粒各自、协同改性PVDF膜,考察PVDF膜渗透性能的变化。结果表明,Al_2O_3显著降低PVDF膜通量衰减系数和膜抗污染能力,且添加量为0.4%时改性效果最佳。SiO_2显著提高PVDF膜的亲水性和水通量,抗污染能力明显增强,且添加量为0.6%～0.8%时改性效果最好。纳米Al_2O_3和SiO_2质量比为1∶2时,协同改性PVDF膜展现出更优良的性能。PVDF/Al_2O_3/SiO_2膜的水通量、截留率和衰减系数均随着纳米Al_2O_3和SiO_2的添加总量先增加后减少,在0.8%处达到峰值,改性效果较单一纳米材料更佳。
        In order to improve the separation performance and antifouling capacity of PVDF membrane, PVDF membranes modified by nanoparticles(Al_2 O_3 or SiO_2 and both of them, respectively) were prepared with different weight ratio. The permeability of modified membrane was investigated. The results showed that addition of Al_2 O_3 nanoparticles significantly decreased the flux decline factor of PVDF membrane, and reduced filtration resistance. The optimum content of Al_2 O_3 nanoparticles was 0.4%. Addition of SiO_2 nanoparticles significantly increased the hydrophilicity, water flux and antifouling capacity of the PVDF membrane. A better performance of PVDF/SiO_2 membrane achieved at SiO_2 concentration of0.6%～0.8%. The PVDF/Al_2 O_3/SiO_2 membrane prepared with Al_2 O_3 and SiO_2 at its ratio of 1∶2 exhibited better property. The water flux, BSA retention rate and flux decline factor of PVDF/Al_2 O_3/SiO_2 membrane increased with increasing content of Al_2 O_3+SiO_2, followed by decrease. The property of PVDF membrane with the weight ratio of Al_2 O_3+SiO_2 at 0.8% was much better than that with Al_2 O_3 and SiO_2, respectively. Performance of PVDF membrane modified simultaneously by the two nanoparticles is much better than that with a single nanomaterial.

引文

[1]Xu Z L,Yu L Y,Han L F.Polymer-nanoinorganic particles composite membranes:a brief overview[J].Frontiers of Chemical Engineering in China,2009,3:318-329.
    [2]Liu F,Hashim N A,Liu Y,et al.Progress in the production and modification of PVDF membranes[J].Journal of Membrane Science,2011,375(1):1-27.
    [3]Kang G D,Cao Y M.Application and modification of poly(vinylidene fluoride)(PVDF)membranes-a review[J].Journal of Membrane Science,2014,463:145-165.
    [4]马志刚,马聪,王亮,等.GO-ZnO共混改性PVDF膜的制备及抗污染性能[J].中国给水排水,2018,4(1):42-47.Ma Zhigang,Ma Cong,Wang Liang,et al.Preparation and antifouling properties of GO/ZnO-blended PVDF membrane[J].China Water Supply and Drainage,2018,4(1):42-47.
    [5]龚烨霞,张事,左行涛,等.纳米氧化锌改性聚偏氟乙烯超滤膜的性能研究[J].环境工程学报,2017,7(11):4091-4096.Gong Yexia,Zhang Shi,Zuo Xingtao,et al.Characteristic of polyvinylidene fluoride ultrafiltration membrane modified by nano-zinc oxide[J].Journal of Environmental Engineering,2017,7(11):4091-4096.
    [6]Bai L M,Qu F S,Liang H,et al.Membrane fouling during ultrafiltration(UF)of surface water:effects of sludge discharge interval(SDI)[J].Desalination,2013,319(12):18-24.