腐植酸-纤维素复合农林保水剂的制备及性能

为了改善现有农林保水剂制造成本高,使用周期短,实用性差的现状,利用腐殖酸(HA)和羧甲基纤维素(CMC)通过交联反应制得一种新型的农林保水剂(HA—CMC复合吸水树脂)。研究了各原料最佳配比并进行反应条件优化,随后通过红外光谱和扫描电镜研究产物的物质组成特点和表面结构特征,并与已有的几种保水剂进行了性能比较。结果表明,制备该保水剂各材料最佳配比为CMC∶MBA∶HA∶AM∶KPS=1∶0.015∶0.2∶6∶0.2;产物中HA和CMC交联结果理想,产物表面结构符合一般高吸水材料的结构要求;在与其它4种保水剂的比较中证实:HA—CMC复合吸水树脂吸水能力明显优于其它3种保水剂,与表现最好的地津保水剂无显著性差异,其重复吸释水能力则远优于其它受试保水剂。

Synthesis and Characteristics of Agriculture and Forestry Superabsorbent Compound from Humic Acid and Cellulose

A new kind of super absorbent polymers(SAP, superabsorbent) for agriculture and forestry, HA-CMC compound superabsorbent, was prepared by surface cross-linked reaction with humic acid and carboxyl methyl cellulose to improve the shortages of current SAP. The appropriate proportions of different stuffs and the best reacting conditions were optimized, and the characteristics of constituent and surface texture of the compound were studied by the infra-red spectrum and electron microscope. The abilities of water absorption and repeated water absorption of the compound were then compared with other four SAP. The results showed that the most appropriate mass ratio of CMC, MBA, HA, AM and KPS was respectively 1:0.015:0.2:6:0.2. The HA and CMC reacted well and form a kind of powerful-water-holding surface texture which can provide a high water absorption ability. Compared with other SAP, the compound performed well in water absorption and repeated water absorption. The water absorption ability of the compound was better than other three SAP and had no significant differences with Dijin polymers. The repeated water absorbency ability of the compound was significantly better than others.