UV光固化树脂用于PET无纺布的亲水改性研究

Hydrophilic Modification of PET Non-woven Fabrics by UV Light-cured Epoxy

为了在不破坏PET无纺布结构的前提下对其进行亲水改性,本文采用丙烯酸树脂为预聚物,甲基丙烯酸羟乙酯(HEMA)为亲水单体,1-羟基环己基苯甲酮(184)为光引发剂,乙酸乙酯为溶剂,通过UV光引发自由基聚合法进行涤纶(PET)无纺布的亲水改性。结果表明,当丙烯酸树脂与HEMA固含量为总量的10%,丙烯酸树脂与HEMA的质量比为1∶1,184质量分数为2%,PET无纺布的纯水通量为37 928kg/m2/h,接触角为58.26°时为UV固化亲水改性最优配比。扫描电镜(SEM)显示亲水改性剂牢固地包覆在PET纤维表面,改性后PET无纺布的孔隙率降低。经丙烯酸树脂和HEMA改性后的PET无纺布亲水持久性和对沙土混合废水的过滤性能较好。

In order to carry out hydrophilic modification of PET non-woven fabric without the damage to the structure of PET non-woven fabric,hydrophilic modification of PET nonwoven fabric was implemented with UV light-initiated free radical polymerization by using acrylic resin as the prepolymer,HEMA as the hydrophilic monomer,Irgacure184 as the light initiation agent and ethyl acetate as the solvent.The results show that the optimal process conditions are as follows：mass fraction of acrylic resin and HEMA 10%,mass ratio of acrylic resin and HEMA 1∶1,mass fraction of Irgacure184 2%,pure water flux of the PET non-woven fabric 37 928kg/m2/h,and contact angle 58.26°.SEM image shows that the hydrophilic modifier is firmly coated on the surface of PET fiber;the porosity rate of PET non-woven fabric decreases after the modification;PET non-woven fabric modified by acrylic resin and HEMA has good hydrophilic persistence and filtering property for mixed sand and soil wastewater.