Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-Environment Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China.
Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-Environment Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China.
Carbohydr Polym. 2019 Dec 1;225:115214. doi: 10.1016/j.carbpol.2019.115214. Epub 2019 Aug 19.
To study the application of superabsorbent resin (SAR) in preventing water evaporation in soil, hydroxymethyl cellulose sodium-g-poly (acrylic acid-co-2- acrylamido-2-methyl-1-propanesulfonic acid)/laterite (NaHMC-g-P (AA-co-AMPS)/ laterite) was prepared by radical polymerization. The structure and morphology of SAR were characterized by FTIR, SEM and TGA. The factors affecting the water absorbency of SAR were studied and the water absorption of the resin under the optimum synthetic conditions reached the equilibrium at 15 min in distilled water, and the optimum water absorption of SAR was 1329 g/g, 269 g/g and 140 g/g in distilled water, tap water and 0.9 wt% NaCl solution, respectively. The swelling kinetic mechanism of the SAR was explained by the pseudo-second-order swelling kinetics model and Ritger-Peppas model. The effects of soil type, particle size and content of SAR on water evaporation rate in soil were studied.
为了研究高吸水性树脂（SAR）在防止土壤水分蒸发中的应用，通过自由基聚合制备了羟甲基纤维素钠接枝聚（丙烯酸-co-2-丙烯酰胺基-2-甲基-1-丙磺酸）/红土（NaHMC-g-P（AA-co-AMPS）/红土）。通过 FTIR、SEM 和 TGA 对 SAR 的结构和形态进行了表征。研究了影响 SAR 吸水性的因素，在最佳合成条件下，树脂在蒸馏水中的吸水率在 15 分钟内达到平衡，SAR 的最佳吸水率分别为 1329g/g、269g/g 和 140g/g，在蒸馏水中、自来水中和 0.9wt%NaCl 溶液中。SAR 的溶胀动力学机制通过拟二级溶胀动力学模型和 Ritger-Peppas 模型进行了解释。研究了 SAR 的土壤类型、粒径和含量对土壤水分蒸发率的影响。
