Effect of alkaline treatment of PVDF membranes on preparation of proton exchange membranes with high conductivity

Juan Shen; Xin Ping Qiu; Yong Li; Wen Tao Zhu; Li Quan Chen

Effect of alkaline treatment of PVDF membranes on preparation of proton exchange membranes with high conductivity

Juan Shen^*, Xin Ping Qiu, Yong Li, Wen Tao Zhu, Li Quan Chen

^*Corresponding author for this work

Tsinghua University

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

Fuel Cell is a new type of power source with high power density and little pollution. Proton exchange membrane is a key component of the fuel cell. Poly(vinylidene fluoride) grafted polystyrene sulfonated acid (PVDF-g-PSSA), a kind of proton exchange membrane, with high proton conductivity has been prepared by solution grafting on alkaline treated poly(vinylidene fluoride) membrane. PVDF membranes treated with alkaline solutions were studied by FTIR, FT-Raman spectroscopy and electron spin resonance (ESR). The vibrational spectra showed the existence of conjugated C=C bonds in the treated membranes. Free radicals were observed in the membranes from the ESR spectra, the concentrations of which were in the 10¹⁶ spin/g order of magnitude. The structure modification of the alkaline treated PVDF membrane could improve the grafting on the membrane and played an important role in increasing the conductivity of PVDF-g-PSS A membrane to a high value of 6.40 × 10^-2 S/cm.

Original language	English
Pages (from-to)	1187-1192
Number of pages	6
Journal	Acta Chimica Sinica
Volume	63
Issue number	13
Publication status	Published - 2005
Externally published	Yes

Keywords

Alkaline treatment
Conductivity
Free radical
Graft
PVDF

Cite this

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title = "Effect of alkaline treatment of PVDF membranes on preparation of proton exchange membranes with high conductivity",

abstract = "Fuel Cell is a new type of power source with high power density and little pollution. Proton exchange membrane is a key component of the fuel cell. Poly(vinylidene fluoride) grafted polystyrene sulfonated acid (PVDF-g-PSSA), a kind of proton exchange membrane, with high proton conductivity has been prepared by solution grafting on alkaline treated poly(vinylidene fluoride) membrane. PVDF membranes treated with alkaline solutions were studied by FTIR, FT-Raman spectroscopy and electron spin resonance (ESR). The vibrational spectra showed the existence of conjugated C=C bonds in the treated membranes. Free radicals were observed in the membranes from the ESR spectra, the concentrations of which were in the 1016 spin/g order of magnitude. The structure modification of the alkaline treated PVDF membrane could improve the grafting on the membrane and played an important role in increasing the conductivity of PVDF-g-PSS A membrane to a high value of 6.40 × 10-2 S/cm.",

keywords = "Alkaline treatment, Conductivity, Free radical, Graft, PVDF",

author = "Juan Shen and Qiu, {Xin Ping} and Yong Li and Zhu, {Wen Tao} and Chen, {Li Quan}",

year = "2005",

language = "English",

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pages = "1187--1192",

journal = "Acta Chimica Sinica",

issn = "0567-7351",

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TY - JOUR

T1 - Effect of alkaline treatment of PVDF membranes on preparation of proton exchange membranes with high conductivity

AU - Shen, Juan

AU - Qiu, Xin Ping

AU - Li, Yong

AU - Zhu, Wen Tao

AU - Chen, Li Quan

PY - 2005

Y1 - 2005

N2 - Fuel Cell is a new type of power source with high power density and little pollution. Proton exchange membrane is a key component of the fuel cell. Poly(vinylidene fluoride) grafted polystyrene sulfonated acid (PVDF-g-PSSA), a kind of proton exchange membrane, with high proton conductivity has been prepared by solution grafting on alkaline treated poly(vinylidene fluoride) membrane. PVDF membranes treated with alkaline solutions were studied by FTIR, FT-Raman spectroscopy and electron spin resonance (ESR). The vibrational spectra showed the existence of conjugated C=C bonds in the treated membranes. Free radicals were observed in the membranes from the ESR spectra, the concentrations of which were in the 1016 spin/g order of magnitude. The structure modification of the alkaline treated PVDF membrane could improve the grafting on the membrane and played an important role in increasing the conductivity of PVDF-g-PSS A membrane to a high value of 6.40 × 10-2 S/cm.

AB - Fuel Cell is a new type of power source with high power density and little pollution. Proton exchange membrane is a key component of the fuel cell. Poly(vinylidene fluoride) grafted polystyrene sulfonated acid (PVDF-g-PSSA), a kind of proton exchange membrane, with high proton conductivity has been prepared by solution grafting on alkaline treated poly(vinylidene fluoride) membrane. PVDF membranes treated with alkaline solutions were studied by FTIR, FT-Raman spectroscopy and electron spin resonance (ESR). The vibrational spectra showed the existence of conjugated C=C bonds in the treated membranes. Free radicals were observed in the membranes from the ESR spectra, the concentrations of which were in the 1016 spin/g order of magnitude. The structure modification of the alkaline treated PVDF membrane could improve the grafting on the membrane and played an important role in increasing the conductivity of PVDF-g-PSS A membrane to a high value of 6.40 × 10-2 S/cm.

KW - Alkaline treatment

KW - Conductivity

KW - Free radical

KW - Graft

KW - PVDF

UR - http://www.scopus.com/inward/record.url?scp=33749370175&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:33749370175

SN - 0567-7351

VL - 63

SP - 1187

EP - 1192

JO - Acta Chimica Sinica

JF - Acta Chimica Sinica

IS - 13

ER -

Effect of alkaline treatment of PVDF membranes on preparation of proton exchange membranes with high conductivity

Abstract

Keywords

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