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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粉尘快速去除的聚合物溶液。通过红外、核磁、热重、扫描电镜、表面张力、接触角测试方法对产物的结构及性能进行了测定,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出多孔的交联结构,其结构形态与单体配比有相关性,其中,n(AA)∶n(AM)=1∶9的压制剂更容易与气溶胶粉尘结合;所制压制剂对气溶胶粉尘有较好的润湿性,且不同单体配比的压制剂对气溶胶粉尘的润湿性有影响,当n(AA)∶n(AM)=3∶7时,压制剂与气溶胶粉尘的接触角最小,为64.3°;模拟雾化喷淋实验测试其压制效果表明:与自然沉降法相比,n(AA)∶n(AM)=1∶9的压制剂将气溶胶粉尘浓度降为原始值一半所用的时间从9.4 min缩短到了2.0 min,大大加速了气溶胶粉尘的沉降,且具有明显的压制效果。
An acrylic acid (AA), acrylamide (AM) as the reaction monomer, prepared by free radical polymerization in aqueous solution can be used for rapid removal of radioactive aerosol dust polymer solution. The structure and properties of the product were tested by IR, NMR, TG, SEM, surface tension and contact angle. The results showed that the copolymer P (AM-co-AA) The results showed that the aqueous phase exhibited a porous cross-linked structure with a morphological correlation with the monomer ratio. Among them, the n (AA): n (AM) = 1: 9 press was easier to combine with aerosol dust ; The prepared compacts have good wettability to aerosol dust, and the compacts with different monomer ratios have an impact on the wettability of aerosol dust. When n (AA): n (AM) = 3: At 7 o’clock, the contact angle between the compacting agent and the aerosol dust was the smallest, which was 64.3 °. The test results of the simulated atomizing spray tests showed that the n (AA): n (AM) = 1: 9 Compressor time to reduce aerosol dust concentration to half of the original value from 9.4 min to 2.0 min, greatly accelerating the settlement of aerosol dust, and has obvious suppression effect.