增强型聚四氟乙烯-全氟丙基乙烯基醚中空纤维膜表面结构调控及油水分离性能

舒溪; 肖长发; 陈凯凯; 张泰; 凌浩洋

doi:10.11777/j.issn1000-3304.2020.20101

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增强型聚四氟乙烯-全氟丙基乙烯基醚中空纤维膜表面结构调控及油水分离性能

论文 | 更新时间：2021-01-26

- 增强型聚四氟乙烯-全氟丙基乙烯基醚中空纤维膜表面结构调控及油水分离性能
- The Controllable Surface Structure and Oil-Water Separation Performance of Reinforced Poly(tetrafluoroethylene-co-perfluoropropyl vinyl ether) Hollow Fiber Membranes
- 高分子学报 2020年51卷第12期页码：1356-1366
- 作者机构：
  
  天津工业大学纺织科学与工程学院省部共建分离膜与膜过程国家重点实验室　天津 300387
- 作者简介：
  
  E-mail: xiaochangfa@163.com Chang-fa Xiao, E-mail: xiaochangfa@163.com
- 基金信息：
  
  国家自然科学基金(基金号 51673149)资助项目
- DOI：10.11777/j.issn1000-3304.2020.20101
  中图分类号：
- 纸质出版日期：2020-10-21，
  
  网络出版日期：2020-8-19，
  
  收稿日期：2020-4-14，
  
  修回日期：2020-5-27，
扫描看全文
舒溪, 肖长发, 陈凯凯, 张泰, 凌浩洋. 增强型聚四氟乙烯-全氟丙基乙烯基醚中空纤维膜表面结构调控及油水分离性能[J]. 高分子学报, 2020,51(12):1356-1366.

Xi Shu, Chang-fa Xiao, Kai-kai Chen, Tai Zhang, Hao-yang Ling. The Controllable Surface Structure and Oil-Water Separation Performance of Reinforced Poly(tetrafluoroethylene-co-perfluoropropyl vinyl ether) Hollow Fiber Membranes[J]. Acta Polymerica Sinica, 2020,51(12):1356-1366.
舒溪, 肖长发, 陈凯凯, 张泰, 凌浩洋. 增强型聚四氟乙烯-全氟丙基乙烯基醚中空纤维膜表面结构调控及油水分离性能[J]. 高分子学报, 2020,51(12):1356-1366. DOI： 10.11777/j.issn1000-3304.2020.20101.

Xi Shu, Chang-fa Xiao, Kai-kai Chen, Tai Zhang, Hao-yang Ling. The Controllable Surface Structure and Oil-Water Separation Performance of Reinforced Poly(tetrafluoroethylene-co-perfluoropropyl vinyl ether) Hollow Fiber Membranes[J]. Acta Polymerica Sinica, 2020,51(12):1356-1366. DOI： 10.11777/j.issn1000-3304.2020.20101.

摘要

为解决含油废水处理难题，以聚四氟乙烯-全氟丙基乙烯基醚(PFA)为成膜聚合物，聚乙烯醇(PVA)为粘接剂，采用浸渍-烧结法制备了聚间苯二甲酰间苯二胺(PMIA)编织管增强型(PBR)中空纤维膜，通过改变烧结温度及石墨烯(GE)含量对膜表面结构进行调控，并采用扫描电子显微镜(SEM)、热重分析(TG)、傅里叶红外分析(FTIR)、孔径分析及油水分离试验等考察其对膜结构及油水分离性能影响. 结果表明，随烧结温度升高，油通量减小；随GE含量增加，膜的水接触角、表面粗糙度及孔隙率减小，油通量先增大后减小，油水分离效率逐渐增大；PBR-PFA/GE中空纤维膜可用于油水分离过程，在−0.02 MPa时，对不同油品分离效率均高于97%，且对油包水乳液具有一定的破乳化能力，循环使用后，通量恢复率保持较好.

Abstract

In order to solve the problem of oily wastewater

the poly(m-phenyleneisophthalamide) (PMIA) braided tube reinforced (PBR) poly(tetrafluoroethylene-

-perfluoropropyl vinyl ether)(PFA) hollow fiber membrane was prepared

via

dipping-sintering method with the PFA and poly(vinyl alcohol)(PVA) as membrane-forming polymer and bonding agent

respectively. The membrane surface structure was adjusted by changing the sintering temperature and graphene (GE) content

and the influence of membrane structure and oil-water separation performance were investigated by scanning electron microscopy (SEM)

thermogravimetric (TG)

Fourier transform infrared (FTIR)

pore size analysis and oil-water separation experiment. The morphology observation shows that the surface PFA melts and permeates into the PMIA braided tube after sintering

and separation layer is closely combined with the support layer. The experiment results also indicate that with sintering temperature increasing

the oil flux decreases. On the other hand

with GE content increasing

the water contact angle

roughness

and porosity of PBR-PFA/GE hollow fiber membrane decrease

however

the oil flux increases initially and then decreases

the oil-water separation efficiency increases gradually. Furthermore

the introduction of GE not only has a similar effect on the increase of sintering temperature

but also results in two different ways of pore formation on the membrane surface. The PBR-PFA/GE hollow fiber membrane exhibits excellent hydrophobicity and lipophilicity with more than 97% separation efficiency for different oil products at −0.02 MPa. In addition

the membrane shows higher separation ability to the water-in-oil emulsion

and maintains a fine flux recovery rate after recycling

making it possible to apply in the field of wastewater treatment.

关键词

聚四氟乙烯-全氟丙基乙烯基醚石墨烯增强型中空纤维膜油水分离

Keywords

Poly(tetrafluoroethylene-co-perfluoropropyl vinyl ether)GrapheneReinforcedHollow fiber membraneOil-water separation

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