▎ 摘　　要

NOVELTY - A hot melt casting type nano-composite gel antibacterial agent comprises 70-80 %mass hot melt binder, 2-10 %mass nanoparticles, 1-4.0 %mass radiation sensitizer, 0.2-4.0 %mass pH regulator and 2.0-4.0 %mass emulsifying agent, where the antibacterial agent is an antibacterial material obtained by radiation crosslinking reaction of hot-melt binder and antibacterial nanomaterial base material. USE - As hot melt casting type nano-composite gel antibacterial agent. ADVANTAGE - The hot melt casting type nano-composite gel antibacterial agent is non-toxic, cheap, and not easy to decompose, and has low temperature melting property, strong heat resistance, and high bactericidal power. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method of the hot melt casting type nano-composite gel antibacterial agent comprising (S1) mixing 70-80% hot melt binder, 2-10% nanoparticles, 1-4.0% radiation sensitizer and 0.2-4.0% pH regulator, ultrasonically stirring to prepare a uniform dispersion system, putting the uniform dispersion system to an oil bath pan for 6-8 hours and completely dissolving the uniform dispersion system to a sol state, (S2) adding 2.0-4.0% emulsifying agent to the sample obtained in step (S1) to prepare a dispersion system, filling the dispersion system into a culture dish, leaving for defoaming, placing in a refrigerator for carrying out freezing-thawing cycle for 3-5 times and storing, (S3) placing the sample obtained in step (S2) under ionizing radiation generated by γ-rays or electron beam for radiation crosslinking reaction, where the selected electron beam energy is 1-5 MeV, the radiation dose is 5-60 kGy, and the dosage rate is 5-20 kGy/pass and (S4) soaking the sample in deionized water to remove the uncrosslinked monomer and finally the obtained product is the hydrogel antibacterial agent.