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木质素磺酸钙接枝高吸水树脂是一种含有亲水基团的新型高分子网状聚合物,具有极强的吸水性能。以木质素磺酸钙接枝高吸水树脂为对象,系统地研究了其制备方法、形态结构特征以及作为土壤保墒剂的应用。研究了合成木质素磺酸钙接枝高吸水树脂的工艺条件,得出木质素磺酸钙用量、引发剂种类及用量、交联剂种类及用量、丙烯酰胺用量、中和度、干燥条件等因素对高吸水树脂洗液性能的影响规律,通过单因素法得出试验体系下最佳工艺参数(质量分数):丙烯酸58.5%,丙烯酰胺19.5%,木质素磺酸钙5.85%,引发剂0.39%,交联剂0.19%,中和液15.59%。在此条件下,得到树脂吸去离子水1010g/g,吸0.9%NaCl溶液量110g/g。用红外谱图和扫描电镜分析了合成高吸水树脂的形态和结构,发现共聚物的组成对高吸水树脂的分解温度和表面形态结构特征都存在较大影响。
Calcium lignosulfonate grafted superabsorbent polymer is a new macromolecule network polymer with hydrophilic groups, which has strong water absorption. Calcium lignosulfonate grafted superabsorbent was studied systematically for its preparation method, morphological structure and its application as soil moisture preservative. The technological conditions of synthesis of calcium lignosulfonate grafted superabsorbent resin were studied, and the amount of calcium lignosulphonate, the type and amount of initiator, the type and amount of crosslinking agent, the amount of acrylamide, the degree of neutralization, the drying conditions and so on Factors on the performance of superabsorbent resin, the best process parameters (mass fraction) were obtained by single factor method: acrylic acid 58.5%, acrylamide 19.5%, calcium lignosulfonate 5.85%, initiator 0.39 %, Crosslinking agent 0.19%, 15.59% neutralization solution. Under these conditions, the resin was deionized water 1010g / g, sucked 0.9% NaCl solution volume 110g / g. The morphology and structure of the superabsorbent polymer were analyzed by infrared spectroscopy and scanning electron microscopy. It was found that the composition of the superabsorbent polymer had a great effect on the decomposition temperature and surface morphology of the superabsorbent polymer.