摘要
采用水溶液法制备了聚丙烯酸/丙烯酸钠-丙烯酰胺共聚高吸水树脂(P(AA/AAS-co-AM)),通过元素分析、流变仪、差示扫描量热仪等表征手段,测定并计算了树脂电荷密度、交联密度和亲水性,结合Flory吸水理论,研究了微观结构与树脂耐盐性之间的关系,探讨了丙烯酰胺对丙烯酸系高吸水树脂耐盐性的影响。结果发现,丙烯酸和丙烯酰胺质量比(m(AA):m(AM))从10:0增加到8:2、0.9%NaCl溶液中的溶胀率由52.00 g/g提高到78.86 g/g,其主要原因是亲水性提高;m(AA):m(AM)从8:2增加到6:4、溶胀率由78.86 g/g下降到34.35 g/g,主要原因是电荷密度的下降和交联密度的提高。
The superabsorbent resin P(AA/AAS-co-AM)was prepared by aqueous solution polymerization of acrylic acid,sodium acrylate and acrylamide.The charge density,crosslinking density and hydrophilicity of the resin were measured and calculated by elemental analysis,rheometer,differential scanning calorimeter(DSC)and other characterization means.The relationship between the change of microstructure and change of salt resistance of the resin was studied,combined with the Flory water absorption theory.The effect of acrylamide on the salt resistance of acrylic superabsorbent resin was discussed.The results show that when the mass ratio of acrylic acid and acrylamide(m(AA):m(AM))changes from 10:0 to 8:2,the main factor affecting is the improvement of hydrophilicity with the swelling rate in 0.9%NaCl solution increased from 52.00 g/g to 78.86 g/g.When m(AA):m(AM)changes from 8:2 to 6:4,it is mainly affected by the decrease of charge density and increase of crosslinking density with the swelling rate decreasing from 78.86 g/g to 34.35 g/g.
作者
胡穎兰
冉瑾
崔鹏
郝文涛
窦焰
姚路路
Yingan Hu;Jin Ran;Peng Cui;Wentao Hao;Yan Dou;Luu Yao(School of Chemistry and Chemical Engineering,Hefei University of Technology,Hefei 230009,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2024年第6期25-32,共8页
Polymer Materials Science & Engineering
基金
阜阳市科技重大专项项目(2018053120)
颍上县科技重大专项项目(20190916)。
关键词
丙烯酰胺
电荷密度
交联密度
亲水性
Flory吸水理论
耐盐性
acrylamide
charge density
crosslink density
hydrophilicity
Flory water absorption theory
salt tolerance
