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以丙烯酸、淀粉和尿素为原料,使用自制的紫外光聚合装置制备了耐盐复合型高吸水性树脂。通过研究丙烯酸中和度、尿素和淀粉用量、辐照时间等因素对高吸水性树脂吸液性能的影响,并用红外光谱表征产物结构,确定了耐盐性复合高吸水性树脂的最佳实验条件:中和度为80%,辅照时间为40min,反应温度为25℃～53℃,淀粉含量为12%,尿素含量为4%。最佳条件下树脂吸去离子水率为2100g/g,吸生理盐水率为160g/g。改善高吸水性树脂的吸水性能和降低生产成本、提高可生物降解性和增加缓释尿素功能。
Salt-resistant composite superabsorbent resin was prepared by using the homemade UV polymerization device with acrylic acid, starch and urea as raw materials. The effects of acrylic acid neutralization degree, amount of urea and starch, irradiation time and other factors on the liquid-absorbent property of superabsorbent polymer were studied. The structure of product was characterized by IR, and the optimum experimental conditions of superabsorbent composite The neutralization degree is 80%, the auxiliary illumination time is 40min, the reaction temperature is 25 ° C to 53 ° C, the starch content is 12% and the urea content is 4%. Under the optimal conditions, the resin absorbs the ionized water at a rate of 2100 g / g and the physiological saline absorption rate is 160 g / g. Improve the water absorption of superabsorbent resin and reduce the production cost, improve the biodegradability and increase the function of slow release urea.