棉织物表面亲水拒油双层结构的构建及其自清洁性能

Establishment of hydrophilic-oleophobic double-layer structure on the surface of cotton fabric and its self-cleaning performance

采用表面引发的电子转移可再生催化剂功能的原子转移自由基聚合法(SI-ARGET ATRP)在棉织物表面先后接枝聚甲基丙烯酸羟乙酯层和聚丙烯酸叔丁酯层,水解后得到亲水性的聚丙烯酸层,再利用催化剂EDC·HCl将氟碳非离子表面活性剂链段酯化接枝在聚丙烯酸层表面,在棉织物的表面构建了底层具有亲水性和表层具有拒油性的双层结构。红外扫描谱图表明棉织物表面存在共价接枝的聚合产物,油水接触角测试测得该接枝棉织物上正十六烷的接触角为125°,水的接触角为0°,且保持稳定。试验表明,该接枝棉织物具备良好的亲水拒油性和自清洁效果,为后续开发具有亲水拒油型自清洁纺织品提供了思路。

The hydroxyethyl methylacrylate （HEMA） layer and poly （tert-butyl acrylate） （tBA） layer were grafted onto the surface of cotton fabrics successively adopting the SI-ARGET ATRP process. The hydrophilic polyacrylic acid layer was obtained via hydrolysis. Then the fluorocarbon non-ionic surfactant was esterification grafted on the surface of polyacrylic acid layer, using the EDCoHCI catalyst. The double-layer structure contained hydrophilic bottom layer and oleophobic top layer were established on the surface of cotton fabrics. The FTIR spectrum indicated the existence of covalent grafting polymers on the surface of cotton fabrics. The contact angle experiment demonstrated that the contact angle of hexadecane was 125 ° while water contact angle is 0° , and the CAs were stable. The results showed that these grafted cotton fabric possessed excellent hydrophilicity and olephobicity, as well as outstanding self-cleaning property, which provided ideas to subsequent exploitation of hydrophilic, olephobic self-cleaning textiles.