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作 者 ：刘颖, 魏敏, 杨平华, 严庆海

期 刊 ：核农学报 2016年 30卷 8期 页码：1607-1613

关键词：辐照；农林保水剂；富里酸；溶胀率；

Keywords:irradiation, agriculture and forestry superabsorbent, fulvic acid, the swelling ratio,

摘 要 ：为了合成绿色环保农林保水剂,解决农林保水剂功能单一的问题,以丙烯酸和丙烯酰胺为原料,富里酸为添加剂,通过⁶⁰Co-γ射线引发合成聚丙烯酸/丙烯酰胺/富里酸[P(AA-co-AM)/FA]高吸水性材料,探讨了辐照剂量、FA添加量对保水剂吸水倍率、吸盐倍率的影响,保水剂的反复吸水性能以及其对土壤水分的影响。结果表明,当保水剂中富里酸(FA)含量为15 wt%,辐照剂量为6 kGy时,吸水倍率和吸0.9% NaCl溶液倍率分别为437倍和61倍;30 min达到溶胀平衡,重复吸水10次后,保水剂溶胀倍率为199倍,下降54%;自制保水剂的施用明显增加了土壤含水量,促进了玉米生长。该方法提高了保水剂的吸水保水性能,克服了传统合成方法污染大、能耗高等问题,同时具有多功能性,合成的高吸水性材料适合制作农林保水剂,为植酸类保水剂合成工艺提供了参考。

Abstract:In order to prepare environmental protection of agriculture and forestry superabsorbent, and solve the single function P(AA-co-AM)/FA hydrogels have been prepared using γ-irradiation from a ⁶⁰Co source. The effects of the dose of irradiation, the content of FA was studied. The water absorption rate and reswelling capability of superabsorbent was investigated. The results showed that the hydrogel composite containing 15% FA at irradiation dose 6kGy could absorb 437 times in deionized water and 61 times in 0.9%NaCl solution. After reswelling for 10 times, the hydrogel could still absorb 199 times, which decreased by 54%. The superabsorbent increased soil moisture content, which improved the water absorption and retention properties, overcome the problems of traditional method of more serious pollution and higher energy consumption. The superabsorbent that could save water and provide some nutrients was suitable for preparing agriculture and forestry superabsorbent, and provids some reference for the synthetic technique of hydrogels containing fulvic acid.

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