pH-responsive controlled-release fertilizer with water retention via atom transfer radical polymerization of acrylic acid on mussel-inspired initiator.
pH-responsive controlled-release fertilizer with water retention via atom transfer radical polymerization of acrylic acid on mussel-inspired initiator.
复制标题
DOI：
10.1021/jf401102a
复制
发表时间：
2013-06
影响因子：
6.1
通讯作者：
Zhi-Yuan Ma;Xin Jia;Guoxian Zhang;Jia-mei Hu;Xiu-lan Zhang;Zhiyong Liu;Heyun Wang;Feng Zhou
中科院分区：
文献类型：
--
作者：
Zhi-Yuan Ma;Xin Jia;Guoxian Zhang;Jia-mei Hu;Xiu-lan Zhang;Zhiyong Liu;Heyun Wang;Feng Zhou
首次采用贻贝化学和表面引发原子转移自由基聚合（SI-ATRP）技术相结合的方法制备了聚多巴胺接枝聚丙烯酸（Pdop-g-PAA）包膜控释保水多元复合肥。采用透射电子显微镜（TEM）、傅里叶变换红外光谱（FTIR）、热重分析（TGA）、凝胶渗透色谱（GPC）和电感耦合等离子体发射光谱（ICP）等手段对产物的形貌和组成进行了表征。结果表明，由Pdop内层和PAA外冠形成的刺激响应层对带电荷的营养物质表现出突出的选择性渗透性，并且包封元素的释放速率可以通过pH值来调节。在低pH条件下，Pdop-g-PAA膜层可以减少养分的流失，在高pH条件下，Pdop-g-PAA膜层抑制了负性养分的迁移，但有利于阳离子的释放。此外，PAA刷提供良好的保水性。这种聚合物刷状涂料在多功能控释肥料的研究和开发中具有良好的应用前景。
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.