Institute of Applied Chemistry School of Chemistry and Chemical Engineering, Inner Mongolia University of Science & Technology, Baotou 014010, PR China.
Institute of Applied Chemistry School of Chemistry and Chemical Engineering, Inner Mongolia University of Science & Technology, Baotou 014010, PR China.
Int J Biol Macromol. 2023 Apr 1;233:123643. doi: 10.1016/j.ijbiomac.2023.123643. Epub 2023 Feb 11.
An eco-friendly superabsorbent polymer (SAP) was prepared by grafting 2-acrylamido-2-methyl-1-propanesulfonic acid onto microcrystalline cellulose in lithium chloride/N, N-dimethylacetamide system. The synthesized SAP (cellulose-g-PAMPS) was characterized by FTIR, TGA, SEM, H NMR, C NMR and XRD. The water absorption equilibrium of cellulose-g-PAMPS could be achieved within 10 min in distilled water. Moreover, the maximum water absorption capacities of cellulose-g-PAMPS in distilled water, 0.9 wt% NaCl solution and 3.2 wt% NaCO solution were 648.9, 298.4 and 207.3 g·g, respectively. The water absorption behavior of cellulose-g-PAMPS was interpreted by the pseudo-second-order model. Furthermore, cellulose-g-PAMPS could be used in some extreme conditions due to its high acid and alkali resistance. The water retention rate of cellulose-g-PAMPS could be maintained above 90 % at 25 °C for 6 h. As a consequence, the synthesized SAP can be applied to increase the plant growth and survival time under drought conditions, even under saline alkali conditions.
一种环保型高吸水性聚合物（SAP）是通过在氯化锂/N，N-二甲基乙酰胺体系中将 2-丙烯酰胺基-2-甲基-1-丙磺酸接枝到微晶纤维素上制备的。所合成的 SAP（纤维素-g-PAMPS）通过 FTIR、TGA、SEM、H NMR、C NMR 和 XRD 进行了表征。在蒸馏水中，纤维素-g-PAMPS 的吸水平衡可在 10 分钟内达到。此外，纤维素-g-PAMPS 在蒸馏水中、0.9wt%NaCl 溶液中和 3.2wt%Na2CO3 溶液中的最大吸水率分别为 648.9、298.4 和 207.3g·g-1。纤维素-g-PAMPS 的吸水行为通过拟二级模型进行了解释。此外，由于其耐酸碱性高，纤维素-g-PAMPS 可在一些极端条件下使用。在 25°C 下，纤维素-g-PAMPS 的保水率在 6 小时内可保持在 90%以上。因此，所合成的 SAP 可用于提高植物在干旱条件下甚至在盐碱条件下的生长和存活时间。
