紫外辐照接枝甲基丙烯酸对无纺布性能影响的研究

The Effect of Ultraviolet Radiation Grafting Methacrylic Acid on the Properties of Non-woven Fabric

以二苯甲酮作为光引发剂,利用紫外辐照法引发单体接枝聚合反应,将亲水性单体甲基丙烯酸接枝在无纺布表面对其进行改性。通过测定接枝率,评价聚合物在无纺布表面的接枝程度;通过测定未改性及改性无纺布的膜通量,考察了改性无纺布表面的透水性;通过ATR-FTIR红外光谱和扫描电镜(SEM)对改性前后无纺布进行结构表征。实验结果表明:单体体积分数20%,辐照距离20cm,辐照时间40min,光引发剂二苯甲酮浓度0.1mol/L时,接枝率和膜通量达到最大值,分别为20%和1387L/m2·h。ATR-FTIR红外光谱分析表明无纺布表面负载了亲水性-COOH。

The modification of poly（ethylene terephthalate） nonwoven fabric （PET-NWF） was conducted by the ultraviolet photografting of hy- drophilic methacrylic acid on the NWF surface with using benzophenone as the photoinitiator. The grafting rate was measured to evaluate the load de- gree of hydrophilic polymers. The water filtration performance of the modified NWF was investigated by measuring the membrane flux of modified and unmodified PET-NWF. The structure of unmodified and modified PET-NWF samples were characterized by attenuated total reflectance Fourier trans- form infrared （ATR-FTIR） spectroscopy and scanning electron microscopy （SEM）. The results revealed that the optimum conditions were determined as follows： the volume fraction of monomer was 20%, the radiation distance was 20cm, the irradiation time was 40rain and the benzophenone concen- tration was 0.1mol/L. Under these conditions, the maximum grafting rate and flux of modified NWF were obtained which were 20% and 1387L/m^2·h respectively. The ATR-FTIR infrared spectrum showed that the hydrophilic group -COOH was introduced to the NWF surface.