Manipulating membrane permeability and protein rejection of UV-modified polypropylene macroporous membrane
作者： Hai-Yin Yu , Jin Zhou , Jia-Shan Gu , Song Yang
DOI: 10.1016/J.MEMSCI.2010.08.016
关键词:
摘要: Abstract A three-step photo-induced graft polymerization of 2-hydroxylethyl acrylate (HEA) on the polypropylene macroporous membrane was carried out by using chain transfer agent (CTA) benzyl dithiobenzoate (BDTB). Firstly, benzophenone immobilized surface; secondly, polyHEA (PHEA) grafted surface under UV irradiation in presence HEA and BDTB; thirdly, PHEA membranes with without CTA moieties were respectively immersed a thermostated water bath at 55 °C for further grafting HEA; this step, also second-step modified membrane, containing served as macro-CTA azodiisobutyronitrile (AIBN) initiator. The degree (DG) increased time first step. In second DG monomer concentration, decrease concentration. third continuously reaction conditions adding free radical initiator; chain, relatively higher than that moieties; AIBN initiator, continued to increase time. pure flux rise up 4.48 wt.%, then it decreased gradually, which shared same trend during filtration protein dispersion. recovery ratio after cleaning DG. But rejection dispersion followed reversed flux: down 4.48 wt.%
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