Hydrogel neutron radiation protection material and preparation method thereof

The invention belongs to the field of neutron radiation protection material, discloses a hydrogel neutron radiation protection material and a preparation method thereof, and comprises the following steps: (1) dissolving polyvinyl alcohol and polyoxyethylene with mass ratio being 95-99:1-5 in tertiary distilled water to prepare a polymer solution of 15-20wt%, heating and stirring to obtain uniformdissolved the polymer solution; (2) freezing the polymer solution obtained in step (1) into solid state, then melting at 20-30 DEG C, repeating the process of freezing/melting for 2-6 times, forming hydrogel by physical cross-linking to obtain the neutron radiation protection material. The invention also prepares a hydrogel neutron radiation protection shielding material containing DyCl3, LiCl, B2O3 and BaCl2. The hydrogel neutron radiation protection shielding material has inexpensive price, simple preparation method, good physicochemical property, as high as 94.9% gel percent, 919.1% swelling degree, 0.2MPa tensile strength and 526.7% elongation at break, obvious slowing and shielding functions on fast neutron radiation.