N-取代丙烯酰胺温敏凝胶

Thermosensitive Gels from N-substituted Acrylamides

采用过硫酸钾-四甲基乙二胺为氧化还原引发剂,N,N,-亚甲基二丙烯酰胺为交联剂制备了不同N-取代丙烯酰胺凝胶。研究了这些凝胶在DMF-H_2O混合溶剂中的溶胀性质。表明随取代基增大,凝胶的溶胀比减小。还研究了不同负离子单体、不同正离子单体以及正负离子单体同时存在时,N-异丙基丙烯酰胺(NIPA)凝胶的溶胀性质。结果表明,正负离子单体对凝胶的溶胀性质影响极大,加入离子单体,NIPA凝胶在水中的溶胀比明显增大,对正负离子同时存在时的凝胶溶胀比亦进行了初步研究。

Several thermosensitive gels have been prepared from different N-substituted acrylamides as monomer ,N ,N'-methylene bisacrylamide as closslinking agent, potassium persul-fate-N ,N ,N',N'-tetramethylethyienediamine as redox initiator were prepared. Their swelling ratio in DMF-H2O mixed solvent was investigated. The results show that the swelling ratio of the gels decreases with increasing carbon atoms of the substituent. The N-isopropyl acrylamide gels from copolymerization of NIPA and anionic or cationic comonomers were also prepared and re-searched. It was shown that The influences of ionic comonomers on the behavior of gels are very remarkable. In the presence of both cationic and anionic comonomers,the swelling ratio of the gels was also studied preliminarily.