甲基丙烯酸羟乙酯接枝改性淀粉的制备及性能

SSynthesis and Properties of Grafting Starch frow Hydroxyethyl Methylacrylate

摘要:

甲基丙烯酸羟乙酯（HEMA）与降解淀粉（ST）在过硫酸铵（APS）引发下，通过接枝共聚反应，制备了接枝改性淀粉，讨论了APS、HEMA、反应温度和反应时间对接枝效率（GE）和接枝率（GP）的影响。结果表明，在w（ST）=16.4 %水溶液中，当w（HEMA） =5.08 %， w（APS）=0.84 %时，在50 ℃下反应280 min后所得接枝改性淀粉的GE和GP分别为40 %和27.5 %。红外光谱（FTIR）和凝胶渗透色谱（GPC）表征了产物结构。复鞣革应用结果表明，接枝改性淀粉复鞣革的增厚率，丰满度、柔软性、弹性、发泡感等有所提升。接枝改性淀粉复鞣革的力学性能与参考样相当，产物具有复鞣性能。

Abstract:

HHydroxyethyl methylacrylate (HEMA) was grafted onto the degraded starch by grafting copolymerization using ammonium persulfate (APS) as initiator. The effect of temperature, weight fraction of APS and HEMA, reacting time on the grafting efficiency (GE) and grafting percentage (GP) were investigated. The grafting starch with 40 % GE and 27.5 % GP was obtained when w（ST）=16.4 %,w（HEMA）=5.08 %, w（APS）= 0.84 % and reacted at 50 ℃ for 5 h. The structure and properties of the grafting starch were characterized by FTIR and GPC. Applying of the grafting starch in the process of retanning endow the retanned leather an excellent increment in thickness. The leather retanned by this grafting starch with different GE and GP got the increasing properties of plump, soft, good elasticity and strong foaming feels in addition to increase in the GE and GP.