CMC-g-P(AM-co-NaAMC14S)型高吸水树脂的合成及性能

Synthesis and Properties of CMC-g-P (AM-co-NaAMC14S) Superabsorbent Resin

摘要:

以羧甲基纤维素钠（CMC）、丙烯酰胺（AM）、2-丙烯酰胺基十四烷基磺酸钠（NaAMC14S）为单体，过硫酸铵（APS）为引发剂，N,N-亚甲基双丙烯酰胺（MBA）为交联剂，采用水溶液聚合法制备了抗温耐压的高吸水性树脂CMC-g-P(AM-co-NaAMC14S)，考察了交联剂、引发剂、CMC和NaAMC14S的用量对树脂吸水性能的影响，利用红外光谱（FT-IR）和扫描电镜（SEM）对树脂的结构和表面形态进行表征。结果表明，最佳条件下制备的树脂吸去离子水和0.9%NaCl溶液的倍率分别为1425.6g/g 和 78.6g /g；在30、60和100℃条件下，静置2h，保水率分别为89.6%、68.6%和50.3%；在1000rpm和12000rpm的转速下离心45min，保水率分别为99.94%和73.7%，说明树脂具有较高的吸水倍率和良好的保水性能；通过红外光谱分析表明AM和NaAMC14S成功接枝在CMC上，SEM分析结果表明树脂具有较好的空间网络结构，即比表面积较大，因此具有较好的吸液性能。

Abstract:

A super absorbent polymer, CMC-g-P(AM-co-NaAMC14S), was synthesized by a aqueous solution polymerization method with carboxymethylcellulose sodium (CMC), acrylamide (AM) and 2-acrylamido-tetradecane sulfonate (NaAMC14S) as monomers, ammonium persulfate (APS) as a initiator and N,N'-methylene bisacrylamide (MBA) as a crosslinking agent. The effects of crosslinking agent, initiator, carboxymethylcellulose sodium and 2-acrylamido-tetradecane sulfonate content on water absorbency. The structure of the product was characterized by infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). The test results showed that absorbency of resin in deionized water and 0.9% NaCl water solution reached 1425.6g/g and 78.6g/g, respectively. And the resin was placed 2h at 30, 60, and 100℃, the water retention rate were 89.6%, 68.6% and 50.3%, respectively. In addition, the resin was centrifuged for 45 minutes at 1000rpm and 12000rpm, its water retention rate was 99.94% and 73.7%. It showed that the resin has high water absorption and good water retention property. Infrared spectroscopy analysis showed that AM and NaAMC14S were successfully grafted onto CMC. SEM analysis showed that the resin had better space network structure and increased its specific surface area. Therefore, the resin had better liquid absorbency.