Antibacterial PET Fabrics Modified with Quaternary Ammonium Functionalized Hyperbranched Polymers via Electron Beam Radi
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ISSN 1229-9197 (print version) ISSN 1875-0052 (electronic version)
Antibacterial PET Fabrics Modified with Quaternary Ammonium Functionalized Hyperbranched Polymers via Electron Beam Radiation Shumin Zhang1, Fang Ding1, Zhiguang Li1, Xuehong Ren1*, and Tung-Shi Huang2 1
Key Laboratory of Eco-textiles of Ministry of Education, College of Textile Science and Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China 2 Department of Poultry Science, Auburn University, Auburn 36849, AL, USA (Received November 17, 2019; Revised January 16, 2020; Accepted February 16, 2020) Abstract: The numerous functional groups and dendritic structure of hyperbranched polymers render them for a wide range of applications. In this study, hyperbranched polymer Boltorn H20, containing abundant hydroxyl groups, was modified to prepare quaternary ammonium functionalized hyperbranched polymers, QAS-HPs. The synthesized QAS-HPs were coated on polyethylene terephthalate (PET) fabrics by electron beam radiation. The PET fabrics were endowed antimicrobial and hydrophilic properties after modification. The water contact angles of the modified PET fabrics were tested, and the results showed significant improvement in hydrophilicity. The results of antibacterial efficacy tests showed that the modified PET fabrics could inactivate 100 % of Staphylococcus aureus (S.aureus) and 90.8 % of Escherichia coli O157:H7 (E. coli O157:H7) with 30 min of contact time. Keywords: Antimicrobial, PET fabric, Hyperbranched polymer, Electron beam, Quaternary ammonium compounds
Electron beam (EB) irradiation attracts researchers with respect to its application advantages such as high efficacy, environmentally friendly, and being conducted without temperature or time limitation. EB irradiation has been applied in various fields such as industrial wastewater treatment [14], food sterilization [15,16], clinical radiotherapy [17], and functional modification of various materials [18-22]. It has been reported that the linear polymers could convert to long-chain branched polymers [23] and some copolymers tended to crosslink after EB radiation [24-26], which broaden the application of EB radiation on the modification of hyperbranched polymers materials. The hydrophobicity and low reactiveness of PET fabrics limit their application due to the lack of functional groups in the chemical structure of PET. With regard to the great advantages of EB irradiation in the modification of materials, it is feasible to modify PET fabrics by EB radiation. Previous study has shown that high energy rays irradiation could initiate the polymer molecular chains of PET fibers to generate free radicals [27], which could react with chemicals for functional modification of PET. Furthermore, the application of EB irradiation has been used successfully in the functional modification of textiles such as cotton [28], nylon [29], and polypropylene [30]. In this study, we synthesized functionalized hyperbranched quaternary ammonium salts (QAS) polymers as antibacterial agents to modify PET fabrics
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