辐射防护用特种橡胶制品的制备与性能研究

Study on Preparation and Property of Special Rubber Products for Radiation Protection

一种新型γ射线防护用橡胶制品填充料由PbWO4和WO3复合制成，其组成为：WO3：PbWO4=40-60：60～40（质量分数）；制备方法：在分散剂、助剂存在下，由Na2WO4溶液与Pb（Ac）2溶液在快速搅拌下沉淀反应得到PbW04沉淀，然后将此PbW04沉淀加入到磨细的WO3浆体中，再研磨1～2h即成。该填充料与硫化橡胶乳液形成的分散系稳定性很好，制成的橡胶制品（手套）对59．5KeV的了射线的屏蔽率可迭15％～18％，抗拉强度达7．8～9．1MPa，断裂伸长率迭700～1000％；对产品中的Pb作迁移性检测，证明是符合安全卫生要求的。

A king of new filler of rubber products for shielding T-ray radiation was composed of PbWO4 and WO3 powders, in which the mass ratio of WO3 to PbWO4 in the composite powders was 40-60：60-40. The method for preparing this special filler was as following： PbWO4 powders was firstly prepared by co-deposition using NazWO4 and Pb（Ac）2 solution with the same volume assisted by the surfactant and co-surfaetant; the as-prepared PbWO4 powders was added into the slurry which was consisted of milled WO3 and distilled water and then grinded 1 - 2 hours to form PbWO4-WO3 composite powders. The stability of the system which was composed of filler （PbWO4-WO3 composite powders） and vulcanized rubber latex was very well. The shielding ratio to 59. 5KeV ）,-ray, tensile strength and tearing stretch-rate of the rubber products made from special fillers were 15-18%, 7. 8-9.1 MPa and 700-1000%, respectively. Moreover, the result of Pb2＋ mobility in the rubber prod- ucts showed their safety and sanitary.