摘要
以聚乙二醇二丙烯酸酯(PEGDA)为交联剂,与丙烯酰胺(AM)、丙烯酸(AA)共聚,制备了一种自降解性微凝胶,考察各因素对微凝胶吸水性能和自降解性能的影响。结果表明,微凝胶合成优化条件为:0.05%PEG600DA,0.5%过硫酸铵,25%AA,75%AM,反应温度65℃,反应时间7 h。微凝胶的吸水倍数随一价离子和二价离子浓度的增大而减小,在50℃纯水中,吸水倍数最高可达近800 g/g。微凝胶在碱性条件下具有良好的自降解性能,并且温度越高,自降解时间越短,在150℃下放置6 h,降解液残渣几乎为0,通过凝胶色谱(GPC)测得数均分子量为Mn=2.9×10^(5)g/mol,表明微凝胶可以完全降解。
A self-degrading microgel was prepared by copolymerizing polyethylene glycol diacrylate(PEGDA)with acrylamide(AM)and acrylic acid(AA)as a cross-linking agent.The effects of various factors on the water absorption properties and self-degrading properties of the microgel were investigated.The results showed that the mass fraction of microgels synthesized was 0.05%PEG600DA,0.5%ammonium persulfate,25%AA and 75%AM,the reaction temperature was 65℃,and the reaction time was 7 h.The water absorption multiplier of microgels decreased with the increase of monovalent and divalent ion concentration,and the highest water absorption multiplier was nearly 800 g/g in pure water at 50℃.Microgels have good self degradation performance under alkaline conditions,the higher temperature,the shorter self degradation time when the microgels are placed at 150℃for 6 h,the residue of degradation liquid is almost 0.The number average molecular weight of Mn=2.9×10^(5)g/mol was measured,which indicated that the microgels could be completely degraded.
作者
付玉龙
段文猛
谢虎
郑存川
FU Yu-long;DUAN Wen-meng;XIE Hu;ZHENG Cun-chuan(College of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu 610500,China;First Gas Production Plant,Xinjiang Oilfield Branch,PetroChina,Karamay 834000,China)
出处
《应用化工》
CAS
CSCD
北大核心
2022年第12期3528-3534,共7页
Applied Chemical Industry
基金
四川省重点研发项目(2021YFG0112)
中国博士后科学基金(2018M631100)。
关键词
聚乙二醇二丙烯酸酯
自降解性能
微凝胶
吸水性能
polyethylene glycol diacrylate
self-degradation properties
microgel
water absorption properties
