摘要
以海泡石黏土(ST)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)和丙烯酰胺(AM)为原料,N,N-亚甲基双丙烯酰胺(MBA)为交联剂,过硫酸钾(KPS)为引发剂,采用微波辐射法,通过接枝共聚合成了ST-g-P(AMPS-co-AM)高吸水性树脂。探讨了适宜的合成条件,并利用FTIR和TG等方法分析了该树脂的结构及其热稳定性。实验结果表明,适宜的合成条件为:AMPS中和度70%、m(AM)∶m(AMPS)=1.7、MBA用量0.06%(w)(用量均基于单体总质量)、KPS用量0.6%(w)、ST用量12.5%(w),在此条件下合成的ST-g-P(AMPS-co-AM)树脂在去离子水和生理盐水中的吸水倍率分别为1 280 g/g和90 g/g。适量ST的引入显著提高了树脂的吸水倍率、耐盐性和热稳定性。
A novel superabsorbent resin sepiolite-g-poly(2-acrylamido-2-methylpropanesulfonicacid- co-acrylamide)(ST-g-P(AMPS-co-AM)) was synthesized by grafting polymerization with sepiolite(ST), 2-acrylamido-2-methylpropanesulfonicacid(AMPS) and acrylamide(AM) as monomers, potassium persulfate(KPS) as initiator and N, N-methylene-bis-acrylamide(MBA) as crosslinking agent under microwave irradiation. The chemical structure and thermal stability of ST- g-P(AMPS-co-AM) were characterized by means of FTIR and TG. Under the optimum reaction conditions of neutralization degree of AMPS 70%, re(AM) : m(AMPS) 1.7, MBA 0.06%(w)(w based on the total monomer mass), KPS 0.6%(w) and ST 12.5%(w), the water absorptions of ST- g-P(AMPS-co-AM) superabsorbent resin were 1 280 g/g in deionized water and 90 g/g in normal saline. The introduction of moderate amount of ST significantly improved the water absorbency, salt- tolerance and thermal stability of the superabsorbent resin.
出处
《石油化工》
CAS
CSCD
北大核心
2014年第2期200-204,共5页
Petrochemical Technology
基金
安徽省高校自然科学基金资助项目(KJ2009B054Z
KJ2009B120Z)