UV-induced graft polymerization of acrylic acid in the sub-micronchannels of oxidized PET track-etched membrane

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• 作者：Ilya V. Korolkov^a ; ^b ; ; Anastassiya A. Mashentseva^a ; ^b ; Olgun Gü ; ven^c ; Abzal A. Taltenov^a
• 关键词：Track-etched membranes ; Poly(ethylene terephthalate) ; Oxidation ; Graft polymerization ; Acrylic acid
• 刊名：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
• 出版年：2015
• 出版时间：15 December 2015
• 年：2015
• 卷：365
• 期：part_PA
• 页码：419-423
• 全文大小：916 K

文摘

In this article, we report on functionalization of track-etched membrane based on poly(ethylene terephthalate) (PET TeMs) oxidized by advanced oxidation systems and by grafting of acrylic acid using photochemical initiation technique for the purpose of increasing functionality thus expanding its practical application. Among advanced oxidation processes (H₂O₂/UV) system had been chosen to introduce maximum concentration of carboxylic acid groups. Benzophenone (BP) photo-initiator was first immobilized on the surfaces of cylindrical pores which were later filled with aq. acrylic acid solution. UV-irradiation from both sides of PET TeMs has led to the formation of grafted poly(acrylic acid) (PAA) chains inside the membrane sub-micronchannels. Effect of oxygen-rich surface of PET TeMs on BP adsorption and subsequent process of photo-induced graft polymerization of acrylic acid (AA) were studied by ESR. The surface of oxidized and AA grafted PET TeMs was characterized by UV–vis, ATR-FTIR, XPS spectroscopies and by SEM.