Preparation method of high-hydrophilicity polyacrylonitrile spinning solution

The invention relates to a preparation method of a high-hydrophilicity polyacrylonitrile spinning solution. The method comprises the following steps: carrying out a copolymerization reaction on an acrylonitrile monomer, a second comonomer, a third comonomer, an initiator and a solvent to obtain a polymerization solution, and carrying out monomer removal and defoaming to obtain the acrylonitrile copolymer. The method is low in cost, the reaction is easy to control, and the prepared polymer is relatively uniform in chain structure and good in hydrophilicity. 本发明涉及一种高亲水性聚丙烯腈纺丝原液的制备方法。该方法包括：将丙烯腈单体、第二共聚单体、第三共聚单体、引发剂和溶剂进行共聚反应，得到聚合溶液，脱单、脱泡，即得。该方法成本低且反应易控制，制备得到的聚合物链结构较均匀，亲水性好。