等离子体接枝聚合制备非对称润湿性Janus棉织物的研究

Study on fabrication of asymmetric wettability Janus cotton fabric by plasma graft polymerization

具有非对称润湿性的Janus材料通常通过构造化学梯度或形态梯度来设计和制备,存在工艺复杂、改性剂含氟和耐久性差等问题。为寻求简单、环保的制备方法,采用等离子体诱导接枝聚合八甲基环四硅氧烷(D4)到棉织物一侧,制得一侧具有超疏水性、另一侧具有亲水性的Jauns棉织物,并应用场发射扫描电子显微镜(FESEM)、红外光谱仪(FT-IR)及视频接触角测试仪等对纤维表面形貌、表面基团变化及表面润湿性能进行表征。结果表明:当等离子体处理功率为80 W,处理时间为8 min时,制备的Janus棉织物超疏水面水接触角为152.1°,另一面保持亲水性,经过10次循环洗涤,超疏水面接触角仍可达150.3°,具有良好的耐洗性。所制备的Janus棉织物仍有较好的手感值,不影响穿着舒适性。该文结果为Janus材料制备和棉织物的功能化应用提供数据参考。

Janus materials with asymmetric wettability are usually designed and prepared by constructing the chemical gradient or morphology gradient,but there exist some problems such as complicated preparation process,fluorine-containing modifier,and poor stability.In order to find a simple and environmentally friendly preparation method,plasma was adopted to induce octamethylcyclotetrasiloxane(D4)for graft polymerization onto one side of cotton fabrics,and Janus cotton fabric with asymmetric wettability performing superhydrophobicity on the one side and hydrophilicity on the other side was prepared.The fiber surface morphology,surface group changes and surface wettability were characterized by field emission scanning electron microscope(FESEM),infrared spectrometer(FT-IR)and video contact angle tester.The results show that when the plasma treatment power is 80 W and the treatment time is 8 min,the water contact angle of the superhydrophobic surface of the Janus cotton fabric is 152.1°,and the other side still maintains good hydrophilicity.After ten cycles of washing,the water contact angle on the hydrophobic side of the fabric can still reach 150.3°,which also has good washing resistance.The prepared Janus cotton fabric still has good hand feeling value without affecting the wearing comfort.The results can provide data reference for the preparation of Janus materials and the functional application of cotton fabrics.