School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Key Laboratory for Chemical Materials of Xinjiang Uygur Autonomous Region, Shihezi University, Shihezi 832003, PR China.
J Agric Food Chem. 2013 Jun 12;61(23):5474-82. doi: 10.1021/jf401102a. Epub 2013 Jun 3.
This work reports a polydopamine-graft-poly(acrylic acid) (Pdop-g-PAA)-coated controlled-release multi-element compound fertilizer with water-retention function by a combination of mussel-inspired chemistry and surface-initiated atom transfer radical polymerization (SI-ATRP) techniques for the first time. The morphology and composition of the products were characterized by transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), gel permeation chromatography (GPC), and inductively coupled plasma (ICP) emission spectrometry. The results revealed that the stimuli-responsive layer formed by a Pdop inner layer and a PAA outer corona exhibit outstanding selective permeability to charged nutrients and the release rate of encapsulated elements can be tailored by the pH values. At low pH, the Pdop-g-PAA layer can reduce nutrient loss, and at high pH, the coating restrains transportation of negative nutrients but favors the release of cations. Moreover, PAA brushes provide good water-retention property. This Pdop-graft-polymer brushes coating will be effective and promising in the research and development of multi-functional controlled-release fertilizer.
这是一份通过贻贝启发化学和表面引发原子转移自由基聚合（SI-ATRP）技术首次制备具有保水功能的多巴胺接枝聚丙烯酸（Pdop-g-PAA）控释多元素复合肥料的研究报告。通过透射电子显微镜（TEM）、傅里叶变换红外（FTIR）光谱、热重分析（TGA）、凝胶渗透色谱（GPC）和电感耦合等离子体（ICP）发射光谱对产物的形貌和组成进行了表征。结果表明，由 Pdop 内层和 PAA 外层冠组成的刺激响应层对带电养分表现出优异的选择透过性，并且通过 pH 值可以调节封装元素的释放速率。在低 pH 值下，Pdop-g-PAA 层可以减少养分损失，而在高 pH 值下，涂层抑制阴离子养分的运输，但有利于阳离子的释放。此外，PAA 刷提供了良好的保水性能。这种 Pdop 接枝聚合物刷涂层在多功能控释肥料的研究和开发中具有有效性和广阔的应用前景。
