木薯淀粉-丙烯酸接枝共聚合成高吸水性树脂

Synthesis of Superabsorbent Polymer of Cassava Starch Grafting Acrylic Acid

[目的]研究木薯淀粉合成高吸水性树脂。[方法]以木薯淀粉和丙烯酸单体为原料,过硫酸铵-亚硫酸钠为引发剂,通过水溶液聚合法制得淀粉基高吸水性树脂。考察了淀粉与单体配比、反应温度、反应时间、中和度和引发剂用量等因素对产品吸水率的影响。[结果]得出产品在室温下1 h内吸去离子水1 844 g/g、0.9%NaCl盐水224 g/g。[结论]该研究为以木薯淀粉与丙烯酸为原料制备高吸水树脂提供科学依据。

[Objective] The research aimed to study the synthesis of superabsorbent polymer by cassava starch.[Method]Using acrylic acid and cassava starch as raw material,ammonium persulfate and anhydrous sodium sulfite as initiator,superabsorbent polymer was synthesized by aqueous solution polymerization.The effect of monomer-starch ratio,reaction temperature,reaction time,acrylic acid and its neutralization degree and the initiators dosage on the water absorption of the product were investigated.[Result] Water absorbency in deionized water and salt water of 0.9% NaCl were 1 844 g/g and 224 g/g respectively at room temperature within 1 h.[Conclusion] The study provided scientific basis for preparing superabsorbent polymer with acrylic acid and cassava starch.