Atomic force microscopy study of membranes modified by surface grafting of cationic polyelectrolyte

Nidal Hilal; L. Al-Khatib; H. Al-Zoubi; R. Nigmatullin

doi:10.1016/j.desal.2005.02.071

Atomic force microscopy study of membranes modified by surface grafting of cationic polyelectrolyte

Nidal Hilal, L. Al-Khatib, H. Al-Zoubi, R. Nigmatullin

Engineering

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

Abstract

Two microfiltration membranes made of polyvinilidene fluoride (PVDF) and polyethersulfone (PES) of the same nominal pore size have been modified by photo-initiated graft copolymerisation of quaternary salt of dimethylamino ethyl methacrylate (qDMAEM). Atomic force microscopy (AFM) has been used to characterise changes in surface morphology with variation of the degree of polymer grafting and therefore the process of modification. Comparative analysis of pore size distribution (PSD) of the initial and modified membranes has revealed differences in the modification process. Although polymer grafting resulted in PSD shifting towards smaller pore sizes, modification of PES membrane narrowed PSD, whereas modified PVDF showed wider PSD. This was attributed to different free-radical density for photo-reactive PES and more inert PVDF with possible contribution of the surface roughness.

Original language	English (US)
Pages (from-to)	45-55
Number of pages	11
Journal	Desalination
Volume	184
Issue number	1-3
DOIs	https://doi.org/10.1016/j.desal.2005.02.071
State	Published - Nov 1 2005

Keywords

AFM
Graft copolymerisation
Membrane
Modification
Morphology

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Materials Science
Water Science and Technology
Mechanical Engineering

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10.1016/j.desal.2005.02.071

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title = "Atomic force microscopy study of membranes modified by surface grafting of cationic polyelectrolyte",

abstract = "Two microfiltration membranes made of polyvinilidene fluoride (PVDF) and polyethersulfone (PES) of the same nominal pore size have been modified by photo-initiated graft copolymerisation of quaternary salt of dimethylamino ethyl methacrylate (qDMAEM). Atomic force microscopy (AFM) has been used to characterise changes in surface morphology with variation of the degree of polymer grafting and therefore the process of modification. Comparative analysis of pore size distribution (PSD) of the initial and modified membranes has revealed differences in the modification process. Although polymer grafting resulted in PSD shifting towards smaller pore sizes, modification of PES membrane narrowed PSD, whereas modified PVDF showed wider PSD. This was attributed to different free-radical density for photo-reactive PES and more inert PVDF with possible contribution of the surface roughness.",

keywords = "AFM, Graft copolymerisation, Membrane, Modification, Morphology",

author = "Nidal Hilal and L. Al-Khatib and H. Al-Zoubi and R. Nigmatullin",

note = "Funding Information: We acknowledge the support of the UK Engineering and Physical Sciences Research Council (EPSRC) under Grant Number GR/ R53647/01.",

year = "2005",

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doi = "10.1016/j.desal.2005.02.071",

language = "English (US)",

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T1 - Atomic force microscopy study of membranes modified by surface grafting of cationic polyelectrolyte

AU - Hilal, Nidal

AU - Al-Khatib, L.

AU - Al-Zoubi, H.

AU - Nigmatullin, R.

N1 - Funding Information: We acknowledge the support of the UK Engineering and Physical Sciences Research Council (EPSRC) under Grant Number GR/ R53647/01.

PY - 2005/11/1

Y1 - 2005/11/1

N2 - Two microfiltration membranes made of polyvinilidene fluoride (PVDF) and polyethersulfone (PES) of the same nominal pore size have been modified by photo-initiated graft copolymerisation of quaternary salt of dimethylamino ethyl methacrylate (qDMAEM). Atomic force microscopy (AFM) has been used to characterise changes in surface morphology with variation of the degree of polymer grafting and therefore the process of modification. Comparative analysis of pore size distribution (PSD) of the initial and modified membranes has revealed differences in the modification process. Although polymer grafting resulted in PSD shifting towards smaller pore sizes, modification of PES membrane narrowed PSD, whereas modified PVDF showed wider PSD. This was attributed to different free-radical density for photo-reactive PES and more inert PVDF with possible contribution of the surface roughness.

AB - Two microfiltration membranes made of polyvinilidene fluoride (PVDF) and polyethersulfone (PES) of the same nominal pore size have been modified by photo-initiated graft copolymerisation of quaternary salt of dimethylamino ethyl methacrylate (qDMAEM). Atomic force microscopy (AFM) has been used to characterise changes in surface morphology with variation of the degree of polymer grafting and therefore the process of modification. Comparative analysis of pore size distribution (PSD) of the initial and modified membranes has revealed differences in the modification process. Although polymer grafting resulted in PSD shifting towards smaller pore sizes, modification of PES membrane narrowed PSD, whereas modified PVDF showed wider PSD. This was attributed to different free-radical density for photo-reactive PES and more inert PVDF with possible contribution of the surface roughness.

KW - AFM

KW - Graft copolymerisation

KW - Membrane

KW - Modification

KW - Morphology

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JO - Desalination

JF - Desalination

IS - 1-3

ER -

Atomic force microscopy study of membranes modified by surface grafting of cationic polyelectrolyte

Abstract

Keywords

ASJC Scopus subject areas

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