MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing, 100083, PR China.
GuangXi Key Laboratory of Chemistry and Engineering of Forest Products, College of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning 530006, PR China.
Carbohydr Polym. 2020 May 15;236:116100. doi: 10.1016/j.carbpol.2020.116100. Epub 2020 Feb 29.
In order to explore a novel type of agricultural water-retaining agent, borax crosslinked fenugreek galactomannan-borax hydrogel (FGB) was synthesized. The hydrogel was characterized by thermogravimetric analysis, FT-IR, XRD, and SEM. The largest swelling index of FGB (115) was higher than that of guar gum hydrogel (70) at pH 9. The water absorption capacity of sandy soil was studied by mixing the hydrogel with soil, then FGB was evaluated as a latent water retention agent. Results showed that the swelling index of sandy soil increased from 16.28% to 35.53% with 0.5 wt.% hydrogel added. The water retention time increased from 2 to 11.5 days at 20 °C and 60 % humidity. Furthermore, more than ten cycles of water absorption and water loss of soil-FGB were carried out at 50 °C at a relatively stable water retention capacity. This low-cost, environmentally friendly hydrogel has great application potential in agriculture for soil water conservation.
为了探索一种新型的农业保水剂，合成了硼砂交联胡芦巴半乳甘露聚糖-硼砂水凝胶（FGB）。通过热重分析、FT-IR、XRD 和 SEM 对水凝胶进行了表征。在 pH 9 时，FGB（115）的最大溶胀指数高于瓜尔胶水凝胶（70）。通过将水凝胶与土壤混合研究了水凝胶对沙土的吸水性，然后将 FGB 评价为潜在的保水剂。结果表明，加入 0.5wt.%水凝胶后，沙土的溶胀指数从 16.28%增加到 35.53%。在 20°C 和 60%湿度下，水保留时间从 2 天增加到 11.5 天。此外，在 50°C 下进行了十多次循环的土壤-FGB 吸水和失水，保水能力相对稳定。这种低成本、环保的水凝胶在农业土壤保水方面具有很大的应用潜力。
