Radical Graft Polymerization of an Allyl Monomer onto Hydrophilic Polymers and Their Antibacterial Nanofibrous Membranes
Radical Graft Polymerization of an Allyl Monomer onto Hydrophilic Polymers and Their Antibacterial Nanofibrous Membranes
复制标题
烯丙基单体在亲水聚合物上的自由基接枝聚合及其抗菌纳米纤维膜
DOI：
10.1021/am200286a
复制
发表时间：
2011-08-01
影响因子：
9.5
通讯作者：
Chiou, Bor-sen
中科院分区：
文献类型：
--
作者：
Wang, Dong;Xu, Weilin;Chiou, Bor-sen
对乙烯摩尔质量分数为27%、32摩尔%和44摩尔%的亲水性聚乙烯醇共聚物(PVA-co-PE)进行功能化处理。反应挤出熔融自由基接枝2，4-二氨基-6-二烯丙基氨基-1，3，5-三嗪(NDAM)。这种官能化赋予了抗菌性能。证实了NDAM作为侧链共价连接在PVA-co-PE聚合物骨架上。研究了引发剂浓度和PVA-co-PE聚合物中乙烯含量对NDAM接枝反应的影响。通过监测熔体扭矩和FTIR光谱的变化，研究了PVA-co-PE聚合物在反应挤出过程中的断链现象。NDAM接枝PVA-co-PE聚合物成功地制备成亲水性纳米纤维和纳米纤维膜，接枝的NDAM具有足够的表面暴露。PVA-co-PE聚合物的亲水性和纳米纤维膜提供的大比表面积显著促进了氯活化过程，提高了接枝PVA-co-PE纳米纤维膜的有效氯含量，从而使其具有优异的抗菌性能。
Hydrophilic poly (vinyl alcohol-co-ethylene) (PVA-co-PE) copolymers with 27 mol %, 32 mol % and 44 mol % ethylene were functionalized by. melt radical graft copolymerization with 2,4-diamino-6-diallylamino-1,3,5-triazine (NDAM) using reactive extrusion. This functionalization imparts antibacterial properties. The covalent attachments of the NDAM as side chains onto the PVA-co-PE polymer backbones were confirmed. The effects of initiator concentrations and ethylene contents in PVA-co-PE polymers on grafting of NDAM were studied. The chain scissions of PVA-co-PE polymers during reactive extrusion were investigated by monitoring changes in the melt torque and FTIR spectra. The NDAM grafted PVA-co-PE polymers were successfully fabricated into hydrophilic nanofibers and nanofibrous membranes with sufficient surface exposure of the grafted NDAM. The hydrophilicity of the PVA-co-PE polymers and the large specific surface area offered by the nanofiber membranes significantly facilitated the chlorine activation process, enhanced the active chlorine contents of the grafted PVA-co-PE nanofiber membranes, and therefore led to their superior antibacterial properties.