空气介质阻挡放电等离子体亚麻表面处理提高接枝率研究

采用空气大气压介质阻挡放电对亚麻织物进行表面处理,在处理后的亚麻表面接枝聚合丙烯酸,进而提高亚麻织物的上染率.用SEM观察了亚麻的表面形貌,用热分析方法与红外光谱证实接枝的有效性,用吸收光谱法评定了接枝率.研究了放电电压、处理时间对接枝率的影响,发现随放电电压的升高,接枝率升高;随处理时间的增加,接枝率在前30 s处理时间内迅速增加,随处理时间的进一步延长,接枝率反而下降,最后呈现一种饱和的趋势,接枝率最大提高为46.6%.染色照片表明染色的不均匀性应该是染色过程造成的.

Study of improvement of graft and dyeability of linen by air DBD plasma surface treatment

The surface of linen was modified by dielectric barrier discharge in ambient air. Acrylic acid monomer was grafted and polymerized to the treated linen surface to improve the dyeability of linen textile. Scanning electron microscopy was used to view the surface of linen. Differential thermal analysis and Fourier transform infrared spectroscopy were used to identify the validity of the graft. Visible absorption spectroscopy was used to analyze the change of graft efficiency. The effect of the discharge voltage and treatment time on the graft rate was studied. The results show that graft efficiency increases with the discharge voltage. However, for treatment time, 30 s is optimal. The increasing of 46.6% for graft rate at treatment time 30 s is reached. With the treatment time extending further, graft rate decreases instead. Numerical photo shows that the dyeing is not uniform and this should be caused by the dyeing process.