膨润土/丙烯酸聚合物保水保肥材料制备及性能  

Preparation and properties of bentonite/acrylic resin moisture and fertilizer retaining agent

作　　者：冯启明[1] 董发勤[1] 王维清[1] 李瑾丽[1] 

机构地区：[1]西南科技大学环境与资源学院,四川绵阳621010

出　　处：《功能材料》2010年第4期627-629,共3页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(40502008)

摘　　要：采用溶液聚合法制备保水保肥剂,并对其保水保肥性能进行研究。结果表明,制备保水保肥剂的最佳条件为交联剂、膨润土、引发剂用量分别占单体质量的0.05%、15%、0.45%,反应温度为75℃,中和度为90%;其吸蒸馏水倍率为796g/g;保水剂在室温下24h的水分蒸发率<9%,60℃的水浴锅中10h为99.72%;在4000r/min下离心10min保水率为57.4%。对浓度为10.0g/L的尿素溶液的吸附倍率为500g/g,由0.1g保水剂饱和吸附了浓度为20%的尿素溶液后制备的溶胶肥,用50ml蒸馏水动态淋滤后尿素残留为31.78%。Moisture and fertilizer retaining agent was prepared by solution polymerization method,and the properties of retaining moisture and fertility were studied.The research results show the optimum preparation conditions are as follows：the amount of cross-linking agent,bentonite and initiator accounting of the monomer mass is 0.05%,15%,0.45%,respectively.The reaction temperature is 75℃;the neutralization degree is 90%.Moisture and fertilizer retaining agent absorbing distilled water rate is 796g/g,water evaporation quantity is less than 9% at room temperature in 24h,and water evaporation quantity is 99.72% in 60℃ water bath in 10h.The water-retention rate is 57.4% at the centrifugation speed of 4000r/min in 10min;the adsorption rate is 500g/g to urea solution which concentration is 10.0g/L.To 0.1g water-retaining agent which adsorbed urea solution which concentration is 20%,the residual urea is 31.78% after wash with 50ml distilled water in dynamic leaching.

关 键 词：膨润土/丙烯酸 保水保肥剂 氮素缓释效应 

分 类 号：P578.965[天文地球—矿物学] TB324[天文地球—地质学]