海藻酸聚乙二酯的制备及表征  

Synthesis and characterization of SA-g-PEG

作　　者：张鸿[1] 焦玉龙[1] 徐海涛[1] 邢阳阳[1] 祝国富[1] 郭静[1] 于跃[1] 

机构地区：[1]大连工业大学纺织与材料工程学院,辽宁省大连市116034

出　　处：《合成树脂及塑料》2016年第5期21-25,共5页China Synthetic Resin and Plastics

基　　金：大连市科技计划项目(2015E11SF050)

摘　　要：以1-乙基-3-[3-(二甲基胺基)丙基]-碳化二亚胺盐酸盐为偶联剂,N,N-二甲氨基吡啶为催化剂,采用无水对甲苯磺酸对海藻酸钠(Na Alg)进行质子化,甲酰胺和N,N-二甲基甲酰胺为溶剂,在Na Alg分子链上接枝聚乙二醇(PEG)制备了海藻酸聚乙二酯(SA-g-PEG)。通过单因素变量的方法,探究了单体质量比、反应时间、反应温度等对SA-g-PEG接枝率的影响。结果表明:m(Na Alg)∶m(PEG)为1∶10,反应时间为24 h,反应温度为60℃,无水对甲苯磺酸用量为0.324 g时,接枝率最高,达到0.98%;SA-g-PEG具有较好的热稳定性,PEG的引入一方面未破坏Na Alg的固有结构,另一方面增加了Na Alg的蓄热功能。Sodium alginate（NaAlg）is protonated by p-toluene sulfonic acid, then polyethylene glycol（PEG）is grafted to the molecular chain of NaAlg to prepare sodium alginate-g-polyethylene glycol（SA-g-PEG）with 1-ethyl-3-（3-（dimethyl aminyl）propyl）-carbodiimide-hydrochloride as the coupling agent, N, N-dimethylaminopyridine as the catalyst, formamide and N, N-dimethylformamide as the solvent. The impact of mass ratio, reaction time and temperature of the monomer on the grafting ratio of SA-g-PEG are investigated by controlling the single factor variation. The results show that the highest grafting ratio of 0.98% is obtained when the mass ratio of NaAlg and PEG is 1∶10, the reaction time is 240 h, the reaction temperature is 60 ℃, and the dosage of p-toluene sulfonic acid is 0.324 g. SA-g-PEG has good thermostability, which indicates that the introduction of PEG doesn＇t break the structure of NaAlg, but improve its heat storage.

关 键 词：海藻酸聚乙二酯 聚乙二醇 大单体接枝 

分 类 号：O633.14[理学—高分子化学]