Effect of ionic liquid on the structure and desalination performance of PVDF‐PTFE electrospun membrane

ABSTRACT The relatively large pore size of electrospun membranes might limit their application for direct contact membrane distillation (DCMD). Incorporation of ionic liquid is a potential approach to decrease the pore size of electrospun membranes, which was attributed to the increased conductivity...

Full description

Saved in:
Bibliographic Details
Published inJournal of applied polymer science Vol. 137; no. 11
Main Authors Li, Jun, Ren, Long‐Fei, Shao, Jiahui, Adeel, Mister, Tu, Yonghui, Ma, Zhongbao, He, Yiliang
Format Journal Article
LanguageEnglish
Published Hoboken, USA John Wiley & Sons, Inc 15.03.2020
Wiley Subscription Services, Inc
Subjects
Desalination
Distillation
Electrospinning
electrospun membrane
ionic liquid
Ionic liquids
Ions
mass transfer
Materials science
membrane distillation
Membranes
Morphology
Polymer blends
Polymers
Polytetrafluoroethylene
Polyvinylidene fluorides
Pore size
Porosity
PVDF
Vinylidene fluoride
Online AccessGet full text

Cover

More Information
Summary:ABSTRACT The relatively large pore size of electrospun membranes might limit their application for direct contact membrane distillation (DCMD). Incorporation of ionic liquid is a potential approach to decrease the pore size of electrospun membranes, which was attributed to the increased conductivity of electrospinning solution. In this study, a novel nanofibrous membrane based on the blends of poly(vinylidene fluoride) (PVDF), polytetrafluoroethylene (PTFE) and ionic liquid (BMIMPF6) was fabricated and applied for the DCMD. The effects of the BMIMPF6 on the morphology, pore size and DCMD performance of the PVDF‐PTFE nanofibrous membrane were investigated. Compared with neat (PVDF‐PTFE) membranes (average pore size: 0.93 μm), the incorporation of BMIMPF6 resulted in a smaller mean pore diameter (0.58 μm). The liquid entry pressure value of the modified composite membrane also increased from 62.75 kPa (neat) to 83 kPa, due to the decreased pore size. The composite membrane exhibited a longer lifespan (about 26 h) than neat membrane during long‐term DCMD process, which makes this composite membrane a promising candidate for DCMD application. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48467. The morphology of PPB membrane
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:0021-8995
1097-4628
DOI:10.1002/app.48467