氦等离子体接枝聚合棉织物的疏水改性

摘要

为赋予棉织物疏水性能，采用氦为气氛的低压射频辉光放电等离子体对棉织物进行一步法接枝聚合四甲基四乙烯基环四硅氧烷。考察氦等离子体处理压强、时间和功率对棉织物接枝聚合四甲基四乙烯基环四硅氧烷接枝率的影响，并对氦等离子体处理前后的棉织物进行红外光谱、X射线光电子能谱、热重、扫描电镜和疏水性能测试。结果表明：经氦等离子体处理后的棉纤维表面被一层均匀、致密的薄膜包覆，并具有较好的耐热稳定性；在等离子体处理时间为2～3 min、压强为20 Pa、功率为80 W时，四甲基四乙烯基环四硅氧烷单体在棉织物上接枝增重率为4�52％，织物的水接触角可达150°；红外光谱和XPS分析表明棉织物表面引入了新的Si—O键和Si元素。%Helium plasma induced graft polymerization of 1,3,5,7⁃tetravinyl⁃1,3,5,7⁃tetra⁃methylcyclo⁃tetrasiloxane was investigated on cotton fabrics to prepare hydrophobic materials. The effects of plasma treatment parameters, such as radio frequency ( RF) power, treatment pressure and time on the graft ratio were investigated. Moreover, morphological, structural and hydrophobic properties of cotton before and after plasma treatment were characterized using field emission scanning electron microscopy ( FESEM ) , Fourier transform infrared spectroscopy ( FT⁃IR ) , X⁃ray photoelectron spectroscopy ( XPS ) and water contact angle analysis, respectively. The results showed that the treated cotton fibers were coated by uniform and dense films, and good in thermal stability. The cotton fabric presents an excellent hydrophobicity with a water contact angle of 150° under conditions of load pressure of 20 Pa, RF power of 80 W and time of 2 min. Infrared and XPS spectra indicated that after initiation by the He plasma, the surface of cotton fabrics introduced new Si—O bonds and Si element.