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Title: Functionalization of nylon membranes via surface-initiated atom-transfer radical polymerization
Authors: Xu, F.J. 
Zhao, J.P.
Kang, E.T. 
Neoh, K.G. 
Li, J. 
Issue Date: 31-Jul-2007
Citation: Xu, F.J., Zhao, J.P., Kang, E.T., Neoh, K.G., Li, J. (2007-07-31). Functionalization of nylon membranes via surface-initiated atom-transfer radical polymerization. Langmuir 23 (16) : 8585-8592. ScholarBank@NUS Repository.
Abstract: The ability to manipulate and control the surface properties of nylons is of crucial importance to their widespread applications. In this work, surface-initiated atom-transfer radical polymerization (ATRP) is employed to tailor the functionality of the nylon membrane and pore surfaces in a well-controlled manner. A simple two-step method, involving the activation of surface amide groups with formaldehyde and the reaction of the resulting N-methylol polyamide with 2-bromoisobutyryl bromide, was first developed for the covalent immobilization of ATRP initiators on the nylon membrane and its pore surfaces. Functional polymer brushes of 2-hydroxyethyl methacrylate (HEMA) and poly(ethylene glycol)monomethacrylate (PEGMA) were prepared via surface-initiated ATRP from the nylon membranes. A kinetics study revealed that the chain growth from the membranes was consistent with a "controlled" process. The dormant chain ends of the grafted HEMA polymer (P(HEMA)) and PEGMA polymer (P(PEGMA)) on the nylon membranes could be reactivated for the consecutive surface-initiated ATRP to produce the corresponding nylon membranes functionalized by P(HEMA)-b-P(PEGMA) and P(PEGMA)-b-P(HEMA) diblock copolymer brushes. In addition, membranes with grafted P(HEMA) and P(PEGMA) brushes exhibited good resistance to protein adsorption and fouling under continuous-flow conditions. © 2007 American Chemical Society.
Source Title: Langmuir
ISSN: 07437463
DOI: 10.1021/la7011342
Appears in Collections:Staff Publications

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