P(AM-co-AA)放射性气溶胶压制剂的制备及表征

Preparation and Performance of P(AM-co-AA) for Capturing and Encapsulating Radioactive Aerosols

摘要:

针对核活动中产生的放射性气溶胶污染，本文以丙烯酸(AA)，丙烯酰胺(AM)为反应单体，在水溶液中采用自由基聚合法制备得到一种可用于放射性气溶胶快速去除的聚合物溶液。通过对产物进行红外、核磁、热重、扫描、表面张力、接触角测试，结果表明：丙烯酰胺与丙烯酸反应生成了共聚物P(AM-co-AA)；聚合物在水相中呈现一种多孔的交联结构，其结构形态与单体比例具有一定的相关性；所制压制剂对气溶胶有较好的润湿性，且不同单体比例的压制剂对气溶胶的润湿性能有一定的影响；模拟雾化喷淋试验测试其压制效果表明：与自然沉降相比，n(AA):n(AM)为1:9的压制剂将气溶胶浓度为原始值一半所用的时间从9.4min缩短到了2.0min，大大加速了气溶胶的沉降，且具有明显的压制效果。

Abstract:

For radioactive aerosols contaminated nuclear activities that might arise, a kind of water-soluble resin was synthesized based on acrylamide(AM) and acrylic acid(AA) via free radical copolymerization in aqueous solution for remove radioactive aerosols. The resin were characterized by FT-IR, 13CNMR and thermogravimetric(TG). The results shows that AM and AA reaction generated random copolymer P(AM-co-AA); The structure of different monomer ratio were also characterized by SEM , it demonstrates that the microstructure of copolymer with porous crosslinked networks in water phase related to the monomer ratio; Through surface tension analysis, it also shows that the monomer ratio affects the wettability of aerosols. The spray atomization experiment shows that the pressure can accelerate settlement of aerosol, has obvious effect of supressing.