脱脂紫茎泽兰水凝胶的制备研究

Hydrogel Preparation Technology with Degreased Eupatorium adenophorum

以苯-醇溶液脱脂后的粉末状紫茎泽兰为初始原料,优化制备廉价且具有高吸液性能的农林用保水水凝胶。结果表明:丙烯酸和丙烯酰胺2种单体总量与原料质量比为11∶1,丙烯酸中和度45%,引发剂用量占原料质量的1.5%,交联剂用量占总单体量的0.4%,反应温度60℃,时间5 h,制得水凝胶吸液性能较优;在去离子水和0.9%NaCl溶液中,凝胶最大饱和溶胀度分别为931 g/g和337 g/g。用傅立叶红外光谱(FT-IR)证明原料成功接枝聚丙烯酸和聚丙烯酰胺单体,通过扫描电镜(SEM)对产物表面形态进行表征。

The low-cost superabsorbent hydrogel for agriculture and forestry was manufactured by taking the pulverized Eupatorium adenophorum as raw material that was degreased by benzene-ethanol mixture. The results showed that the hydrogel with optimal absorbency was obtained under the conditions that the weight ratio of AA/AM graft copolymerization to dry pulverized raw material as 11 ： 1, the neutralization degree of AA as 45 % , the weight ratio of initiator to raw material as O. 015： 1. 000, the weight ratio of cross-linker to two monomers as 0. 004： 1. 000, the reaction was taken place at 60℃ for 5 h. The maximum saturated swelling degree of the hydrogel was 931 g/g in de-ionized water and 337 g/g in 0. 9% NaCl solution. The evidence of graft copolymerization was determined by using FT - IR spectroscopy, and the surface morphology of the PAA/PAM hydrogel product was characterized by SEM.