Preparation method of ultra-fine fiber material for preventing neutron radiation

The invention provides a preparation method of an ultra-fine fiber material for preventing neutron radiation. A PP section and nano B4C blend is used as a raw material of the ultra-fine fiber material, a titanate coupling agent and TAS-2A are used as additives, and PP/B4C blend is subjected to melt spinning by melt blowing. A fast neutron slowing-down material (polypropylene) and a slow neutron absorbing material (nano boron carbide) are blended, on the basis of surface modification on the nano boron carbide by the titanate coupling agent, a TAS-2A dispersant is added, therefore, the nano B4C is uniformly adhered to the surface of a carrier, after PP/B4C masterbatches are prepared, the PP/B4C masterbatches and matrix sections are blended in proportion, melt spinning is carried out by melt blowing, the nano boron carbide are uniformly dispersed into polypropylene ultra-fine fibers, the prepared ultra-fine fiber net-shaped material is soft, fluffy, light and thin and is good in breathability, and then protectiv