丙烯酰胺-结冷胶接枝共聚物的制备及性能  

Preparation and Properties of Polyacrylamide-grafted Gellan Gum Copolymers

作　　者：侯露 曾珠亮 常飞 HOU Lu;ZENG Zhuiang;CHANG Fei(School of Life and Health Science,Kaili University,Kaili 556011,China;School of Kaili Kaili University,Kaili 556011,China)

机构地区：[1]凯里学院大健康学院,贵州凯里556011 [2]凯里学院理学院,贵州凯里556011

出　　处：《塑料工业》2025年第1期31-35,138,共6页China Plastics Industry

基　　金：贵州省教育厅青年科技人才成长项目(黔教合KY字〔2022〕076号);黔东南州科技计划项目(黔东南科合J字〔2022〕60号);凯里学院“十四五”学科专业平台团队一体化建设规划-科研平台项目(YTH-PT202404);凯里学院2022年扶持市(州)高校质量提升工程项目:校级教学团队(大药学)(JXTD202202)。

摘　　要：为了改善传统的天然多糖应用于污染防治或生物医药领域的局限性,以硝酸铈铵(CAN)为氧化还原引发剂,采用自由基聚合法制备丙烯酰胺(AM)-结冷胶(GG)接枝共聚物(PAM-g-GG),改变引发剂CAN浓度、单体AM浓度和反应时间优化PAM-g-GG的制备工艺。利用傅里叶红外光谱(FTIR)、热重分析(TG)进行表征,并对PAM-g-GG的溶胀性能、保水性能和降解性能进行考察。结果表明,当AM浓度为0.48 moL/L,引发剂CAN浓度为8.36 mmoL/L,反应时间为2 h时,接枝率和接枝效率分别为597.45%和80.00%,为制备的最佳工艺。FTIR和TG显示AM与GG已成功接枝共聚。经溶胀性能及降解性能测试显示,PAM-g-GG最大平衡溶胀率为211.46%,21 d降解率最高为84.44%。通过接枝共聚使GG与AM的性能相互改善和促进,从而获得经济适用、高溶胀率和良好的生物可降解性的接枝共聚物材料,在环境污染防治或生物医药领域具有良好的应用前景。To improve the limitations of traditional natural polysaccharides in the pollution prevention or biomedicine fields,a polyacrylamide(AM)-grafted gellan gum(GG)copolymer(PAM-g-GG)was successfully prepared by the free radical polymerization with ceric ammonium nitrate(CAN)as a redox initiator.The PAM-g-GG preparation processes were optimized by changing the initiator concentration,monomer concentration and reaction time.Copolymers were characterized by Fourier transform infrared spectroscopy(FTIR)and thermogravimetry(TG).The PAM-g-GG swelling property,water retention property and degradation property were investigated.The results show that when the AM concentration is 0.48 mol/L,the CAN initiator concentration is 8.36 mmol/L and the reaction time is 2 h,the grafting rate and grafting efficiency are respectively 597.45%and 80.00%.This process is the best preparation process.FTIR and TG show that AM is successfully grafted on the GG.The swelling and degradation performance tests show that the maximum equilibrium swelling rate of PAM-g-GG is 211.46%,and the highest degradation rate after 21 d is 84.44%.The properties of GG and AM are mutually improved and promoted by the graft copolymerization,obtaining grafted copolymer materials with good economical applicability,high swelling rate and good biodegradability.These materials show good application prospects in the environment pollution control or biomedicine fields.

关 键 词：结冷胶 丙烯酰胺 接枝共聚物 

分 类 号：TQ31[化学工程—高聚物工业]