紫外光固化技术对聚丙烯非织造布的亲水改性

Hydrophilic modification of polypropylene nonwoven fabrics by UV curing

为扩大聚丙烯非织造布在水处理领域的应用,采用丙烯酸树脂为预聚物,聚乙二醇(400)二丙烯酸酯(PEG(400)DA)为亲水单体,1-羟基环己基苯甲酮(184)为光引发剂,乙酸乙酯为溶剂,通过紫外光(UV)引发自由基聚合法进行聚丙烯(PP)非织造布的亲水改性。分别研究了预聚物、亲水单体和光引发剂的质量分数对改性PP非织造布亲水性能的影响。结果表明,当丙烯酸树脂、PEG(400)DA和184的质量分数分别为7%、13%、1%时,改性PP非织造布亲水性达到最佳,且具有良好的亲水持久性。扫描电子显微镜(SEM)测试结果显示,亲水改性剂牢固地包覆在PP纤维表面。亲水改性的PP非织造布具有较好的抗污染性能和耐酸碱性能。

To extend its application in the field of water treatment, polypropylene （PP） nonwoven fabrics were modified by ukraviolet （UV） light initiated free radical polymerization between acrylic resin and polyethylene glycol （400） diacrylate （PEG （400） DA） for the improvement of hydrophilicity. The influence of mass fraction of prepolymer, hydrophilic monomer and photo initiator on the hydrophilicity of modified PP nonwoven fabric were studied. The results show that when the acrylic resin, PEG （400） DA and 184 mass fraction are 7%, 13% and 1%, respectively, the modified PP nonwoven fabrics possess the best hydrophilicity and hydrophilic durability. The scanning electron microscopy （SEM） results show that the surfaces of PP fibers are firmly coated with the hydrophilic modifier. The PP nonwoven fabrics subjected to hydrophilic modification has good anti-contamination performance and good acid and alkali resistance.