Department of Organic Chemistry, Faculty of Chemistry, Urmia University, Urmia, Iran.
Carbohydr Polym. 2018 Dec 15;202:227-235. doi: 10.1016/j.carbpol.2018.08.094. Epub 2018 Aug 30.
In this research, a new superabsorbent copolymer was synthesized based on the tragacanth gum (TG) via graft polymerization of the acrylic acid onto the carboxymethyl tragacanth (CMT) in the aqueous solution. For this purpose firstly, the carboxymethyl tragacanth was synthesized by reaction of the tragacanth gum and the monochlroroacetic acid in basic conditions. Then the acrylic acid was grafted on the carboxymethyl tragacanth via free radical polymerization. The characterization of the products was carried out by FT-IR, TGA, and SEM analyses. The effects of reaction conditions such as different values of the initiator, monomer and crosslinking agent on water absorbency were investigated. Furthermore, the swelling behavior of the synthesized polymer was evaluated in normal saline, tap water, distilled water, at different pHs and in various degrees of neutralization of the acrylic acid. Finally, by studying the obtained results, optimum conditions for the copolymer with the highest swelling ratio were obtained.
在这项研究中，通过在水溶液中将丙烯酸接枝到羧甲基刺槐豆胶（CMT）上，合成了一种基于刺槐豆胶（TG）的新型高吸水性共聚物。为此，首先在碱性条件下用刺槐豆胶和一氯乙酸反应合成羧甲基刺槐豆胶。然后通过自由基聚合将丙烯酸接枝到羧甲基刺槐豆胶上。通过傅里叶变换红外光谱（FT-IR）、热重分析（TGA）和扫描电子显微镜（SEM）分析对产物进行了表征。考察了不同引发剂、单体和交联剂用量等反应条件对吸水性的影响。此外，还在不同 pH 值和不同中和度的生理盐水、自来水、蒸馏水以及中性条件下评价了合成聚合物的溶胀行为。最后，通过对所得结果的研究，得出了具有最高溶胀比的共聚物的最佳条件。
