以价廉易得的高岭土和海藻酸钠为原料,通过水溶液共聚法制备了海藻酸钠/高岭土聚(丙烯酸-丙烯酰胺,AA-AM)高吸水性树脂。考察了海藻酸钠用量、高岭土用量、中和度、引发剂用量、交联剂用量及AM与AA质量比等实验条件对吸水性的影响。结果表明:高岭土10%,海藻酸钠8%,中和度70%,AM与AA质量比0.25,引发剂0.6%,交联剂0.04%时制备的树脂有好的吸水性和耐盐性,其在蒸馏水和0.9% NaCl盐溶液中的吸水率分别为890.6g/g和118.3g/g。树脂也有较高的热稳定性,5次重复吸水率降低不明显。采用傅里叶变换红外光谱法对树脂结构进行了分析。
Sodium alginate /kaolinite/poly(acrylic acid-acrylamide) super absorbent resin was prepared by means of aqueous solution copolymerization based on cheap and easily available of kaolinite and sodium alginate as raw materials.The influences of experimental conditions such as sodium alginate amount,kaolinite amount,neutralization degree,initiator dosage,crosslinker dosage on water-absorbing function of resin were investigated.Under conditions of kaolinite amount at 10%,sodium alginate amount at 8%,degree of neutralization at 70%,mass ratio of AM to AA at 0.25,initiator at 0.6% and crosslinker at 0.04%,water absorption of resin in distilled water and 0.9% NaCl salt solution can reach 890.6g/g and 118.3g/g,respectively.The resin possessed higher water absorption and stronger salt tolerance.Additionally,the resin also had high thermal stability with the small decrease of water absorption of the resin after 5 times repeated water absorption.The structure of super absorbent resin was analyzed by fourier transform infrared spectroscopy.
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基金资助
河南省青年骨干教师培养项目(2019GZGG068);焦作市政府决策研究招标课题(JZZ2020035)
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