β-环糊精-尿素缓控释肥料的制备及应用性能研究

目的]主要探讨将β-环糊精-（β-CD）用于制备尿素缓控释肥料的可行性.方法]以β-CD为主体分子,以尿素为客体分子制备环糊精包合物肥料,并且进行红外光谱和溶出度试验.结果]红外光谱证实了β-CD对尿素的包合作用;当尿素与β-CD的摩尔比为1∶1时,纯水中尿素的初期溶出率为14.37％,微分溶出率为2.37％,28 d累积溶出率为42.57％;包合物中尿素的初期溶出率、微分溶出率和28 d累积溶出率均随本底浓度增大而减小.结论]包合物对尿素具有缓控释作用.

Preparation of β-cyclodextrin-Urea Controlled-Release Fertilizers and Its Aplication Performance

Objective] The research aimed to study the application of β-CD in the preparation of controlled release fertilizer.Method] The inclusion complex was prepared by urea and β-CD,and the dissolution and FT-IR were studied.Result] The result of FT-IR indicated inclusion complex formation between β-CD and urea.The preliminary solubility rate,differential dissolving rate and cumulative release rate in 28 days were 14.37％,2.37％ and 42.57％,respectively,when the mole ratio of urea to β-CD was 1∶ 1.The preliminary solubility rate,differential dissolving rate and cumulative release rate in 28 days of urea decreased as the urea background concentration increased.Conclusion] The urea could be controlled release by the inclusion complex.