载有苯菌灵的淀粉基水凝胶的控释和吸水性。
Starch-based hydrogel loading with carbendazim for controlled-release and water absorption.
机构信息
Institute of Nuclear Agricultural Sciences, Key Laboratory of Nuclear Agricultural Sciences of Ministry of Agricultural, Zhejiang University, Hangzhou 310029, China.
Institute of Nuclear Agricultural Sciences, Key Laboratory of Nuclear Agricultural Sciences of Ministry of Agricultural, Zhejiang University, Hangzhou 310029, China.
出版信息
Carbohydr Polym. 2015 Jul 10;125:376-83. doi: 10.1016/j.carbpol.2015.03.004. Epub 2015 Mar 10.
Starch, with properties of eco-friendliness and abundance, is one of the most important natural polymers. Starch-based hydrogels were investigated as carriers of carbendazim to combine controlled-release and water absorption (WA). Three carbendazim-loaded hydrogels (CLHs) with different WA capacities were prepared by solution polymerization. The CLHs were characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and liquid-chromatography mass-spectrometry (LC-MS/MS). Release kinetics of CLHs was investigated using (14)C-labeling method. The diffusion parameters of CLHs were 0.47, 0.57 and 0.81 in deionized H2O (ddH2O). WA affected release profile significantly, the release longevity reaching 240 h when WA was 800 g/g in ddH2O. Solution pH influenced release profiles and the lowest release rate occurred in the lowest pH. Addition of CLH (1.3g/kg soil) markedly increased water-holding capacity (WHC) of soil by 8.2%. The study indicated that starch-based CLH was a good controlled-release agent for carbendazim and water absorbent for soil.
淀粉具有环保和丰富的特性，是最重要的天然聚合物之一。研究了以淀粉为基础的水凝胶作为多菌灵的载体，以结合控制释放和吸水（WA）的功能。通过溶液聚合制备了具有不同 WA 能力的三种载有多菌灵的水凝胶（CLH）。通过傅里叶变换红外（FTIR）光谱、扫描电子显微镜（SEM）和液相色谱-质谱（LC-MS/MS）对 CLH 进行了表征。使用（14）C 标记法研究了 CLH 的释放动力学。CLH 在去离子水中（ddH2O）的扩散参数分别为 0.47、0.57 和 0.81。WA 显著影响释放曲线，当在 ddH2O 中的 WA 为 800 g/g 时，释放寿命达到 240 h。溶液 pH 影响释放曲线，在最低 pH 值时释放速率最低。添加 CLH（1.3g/kg 土壤）可显著将土壤的持水能力（WHC）提高 8.2%。该研究表明，以淀粉为基础的 CLH 是多菌灵的一种良好的控释剂和土壤的吸水剂。
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