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首页> 外文期刊>Applied clay science >PVDF/palygorskite composite ultrafiltration membranes: Effects of nano-clay particles on membrane structure and properties
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PVDF/palygorskite composite ultrafiltration membranes: Effects of nano-clay particles on membrane structure and properties

机译：PVDF /坡缕石复合超滤膜：纳米粘土颗粒对膜结构和性能的影响

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摘要

Palygorskite (PGS) was incorporated into a polyvinylidene fluoride (PVDF) matrix and PVDF/PGS nanocomposite UF membranes were prepared successfully via a combination of non-solvent-induced phase separation (NIPS) and thermally-induced phase separation (TIPS) processes. The influence of the size of the PGS particles (PGS-L, 450 nm and PGS-S, 302 nm) on the membrane pore structure, morphology, mechanical strength, filtration performance and antifouling property were investigated. The results showed that the PVDF/PGS-S composite membranes had higher porosity and lower overall membrane thickness and skin layer thickness. This directly resulted in better PWF, BSA flux, BSA rejection and FRR for the membranes loaded with PGS-S, when compared with the characteristics of PVDF/PGS-L membranes. Thus, the physical structures are dominant factors in determining the separation performance of PVDF/PGS composite membranes. However, the surface roughness and thermal stability of PVDF/PGS-L membranes were greater than those of PVDF/PGS-S membranes and their surface was also more hydrophilic. Moreover, they exhibited higher mechanical strength owing to stronger binding forces and lower porosity. Thus, the composite properties of PVDF/PGS UF membranes could be adjusted by controlling the scale of the inorganic filler.
机译：将坡缕石（PGS）掺入聚偏二氟乙烯（PVDF）基质中，并通过非溶剂诱导相分离（NIPS）和热诱导相分离（TIPS）工艺的组合成功制备了PVDF / PGS纳米复合超滤膜。研究了PGS颗粒尺寸（PGS-L，450 nm和PGS-S，302 nm）对膜孔结构，形貌，机械强度，过滤性能和防污性能的影响。结果表明，PVDF / PGS-S复合膜具有较高的孔隙率和较低的总膜厚度和表皮层厚度。与PVDF / PGS-L膜的特性相比，这直接导致PGS-S膜的PWF，BSA通量，BSA截留率和FRR更好。因此，物理结构是决定PVDF / PGS复合膜分离性能的主要因素。然而，PVDF / PGS-L膜的表面粗糙度和热稳定性大于PVDF / PGS-S膜，并且其表面也更亲水。而且，由于较强的结合力和较低的孔隙率，它们表现出较高的机械强度。因此，可以通过控制无机填料的比例来调节PVDF / PGS UF膜的复合性能。

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  • 来源
    《Applied clay science》 |2019年第11期|105171.1-105171.11|共11页
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  • 作者单位

    Changzhou Univ Sch Petrochem Engn Jiangsu Key Lab Adv Catalyt Mat & Technol 1 Gehu Rd Changzhou 213164 Jiangsu Peoples R China|Huaiyin Normal Univ Sch Chem & Chem Engn Jiangsu Key Lab Chem Low Dimens Mat Jiangsu Engn Lab Environm Funct Mat 111 West Changjiang Rd Huaian 223300 Jiangsu Peoples R China;

    Huaiyin Normal Univ Sch Chem & Chem Engn Jiangsu Key Lab Chem Low Dimens Mat Jiangsu Engn Lab Environm Funct Mat 111 West Changjiang Rd Huaian 223300 Jiangsu Peoples R China;

    Changzhou Univ Sch Petrochem Engn Jiangsu Key Lab Adv Catalyt Mat & Technol 1 Gehu Rd Changzhou 213164 Jiangsu Peoples R China;

    Huaiyin Normal Univ Sch Chem & Chem Engn Jiangsu Key Lab Chem Low Dimens Mat Jiangsu Engn Lab Environm Funct Mat 111 West Changjiang Rd Huaian 223300 Jiangsu Peoples R China|Jiangsu Thinkre Membrane Mat Co Ltd 111 Jinnan Ind Concentrat Zone Jinhu 211622 Jiangsu Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Palygorskite; Polyvinylidene fluoride; Composite membrane; Ultrafiltration; Antifouling property;

    机译：坡缕石;聚偏二氟乙烯;复合膜超滤;防污性能;

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