Preparation method of modified polyvinylidene chloride fiber filter membrane with high barrier property

The invention discloses a preparation method of modified polyvinylidene chloride fiber filter membrane with a high barrier property. The method includes the steps of firstly using hydrochloric acid to acidize ferric oxide particles, secondly adding a mixed solution of water, ethyl alcohol and ammonium hydroxide to conduct ball-milling, thirdly conducting sintering after dropwise adding tetraethyl orthosilicate for a reaction, fourthly adding micro-molecular polyethylene glycol for dispersion after polyvinylidene chloride is dissolved by organic solutions, fifthly adding oxidized graphene for a composite reaction, sixthly conducting an ultrasonic hybrid reaction on products after sintering, seventhly adding hydrazine hydrate as a reducing agent to obtain a spinning solution, and finally conducting electrostatic spinning and then conducting sterilization treatment on the products to obtain the finished product. The material prepared by the method is stable in properties and high in mechanical strength, and has