The invention discloses a preparation method of a humic acid based agricultural and forestry water retaining agent and a agricultural and forestry water retaining agent. Humic acid-based water-retaining agent was prepared by solution polymerization using acrylic acid, acrylamide and potassium humate as raw materials, potassium persulfate as initiator and N, N'-methylene bisacrylamide as crosslinking agent. The experimental results showed that the amount of potassium humate and initiator was 3% and 3% respectively based on the quality of monomer acrylic acid. 0.3%, the amount of crosslinking agent 0.02%, the amount of acrylamide 20%, the degree of neutralization 70%, the reaction temperature 40%, the reaction time 2 h. Under these conditions, the absorbed and deionized water ratio of the water-retaining agent is 821 g/g, the absorbed and deionized water ratio of 0.9% brine is 81 g/g, and the water-releasing rate of the water-retaining agent is very good. It is especially suitable for the use of water-retaining and releasing of agricultural and forestry soil. It is of great significance to the development of modern water-saving agriculture and forestry and ecological restoration in China
【技术实现步骤摘要】
一种腐植酸基农林保水剂的制备方法及其农林保水剂
本专利技术属于保水剂
,具体涉及一种腐植酸基农林保水剂的制备方法及其农林保水剂。
技术介绍
保水剂是一类具有高吸水和保水能力的高分子聚合物,能够吸收自身重量百倍甚至千倍的水分,当环境相对湿度降低时,可缓慢释放其中水分供植物利用,并可重复吸释水[EntryJA,SojkaRE,WatwoodM,etal.Polyacrylamidepreparationsforprotectionofwaterqualitythreat-enedbyagriculturalrunoffcontaminants[J].EnvironmentalPollution,2002,120(2):191-200.]。20世纪60年代初,美国农业部北方研究中心Gugliemilli[吴季怀,林建明,魏月林.高吸水保水材料[M].北京:化学工业出版社,2005:21-25]通过淀粉接技丙烯腈,制备出了部分水解的淀粉接枝丙烯腈共聚物高吸水性保水剂;孙瑞健等[R.J.Sun,M.Y.Li,J.C.Zhang,L.J.Zhu.“TheSynthesisandPropertiesoftheModifiedBentonite-StarchAbsorbentPolymer”,AdvancedMaterialsResearch,Vols.726-731,pp.511-515,2013]以丙烯酸、淀粉和膨润土为原料制备了复合型保水剂;王启强等[王启强,邵水源.尿素/丙烯酸合成保墒剂在碱性土壤中的应用研究[J].化工新型材料,2017,45(9);232 ...
【技术保护点】
1.一种腐植酸基农林保水剂的制备方法,其特征在于:取腐植酸钾加去离子水,使腐植酸钾与去离子水混合均匀;加入丙烯酸,冰水浴条件边搅拌边缓慢逐滴加入2mol/L NaOH至所需中和度,加入丙烯酰胺、过硫酸钾,水浴40℃下搅拌,再加入交联剂N,N’—亚甲基双丙烯酰胺反应;反应完成后取出产物在60℃下干燥至恒重,粉碎研磨既得。
【技术特征摘要】
1.一种腐植酸基农林保水剂的制备方法,其特征在于:取腐植酸钾加去离子水,使腐植酸钾与去离子水混合均匀;加入丙烯酸,冰水浴条件边搅拌边缓慢逐滴加入2mol/LNaOH至所需中和度,加入丙烯酰胺、过硫酸钾,水浴40℃下搅拌,再加入交联剂N,N’—亚甲基双丙烯酰胺反应;反应完成后取出产物在60℃下干燥至恒重,粉碎研磨既得。2.根据权利要求1所述的腐植酸基农林保水剂的制备方法,其特征在于:加入交联剂N,N’—亚甲基双丙烯酰胺反应2h。3.根据权利要求1所述的腐植酸基农林保水剂的制备方法,其特征在于:腐植酸钾的用量为丙烯酸质量的1-4%。4.根据权利要求1所述的腐植酸基农林保水剂的制备方法,其特征在于:过硫酸钾的用量为丙烯酸质量的0.1-0.5%。5...
【专利技术属性】
技术研发人员:朱丽珺,李坤,张金池,姜姜,徐桂明,张芬萍,
申请(专利权)人:南京林业大学,
类型:发明
国别省市:江苏,32
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