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, People's Republic of China.
J Agric Food Chem. 2013 Dec 18;61(50):12232-7. doi: 10.1021/jf4038826. Epub 2013 Dec 9.
A thermoresponsive release multi-element compound fertilizer was first reported on the basis of a polydopamine-graft-poly(N-isopropylacrylamide) bilayer coated on a salty core by a combination of dopamine chemistry and surface-initiated atom transfer radical polymerization techniques, and the control of nutrient release in response to the environmental temperature was investigated. The successful synthesized stimuli-responsive fertilizers were confirmed by transmission electron microscopy (TEM), Fourier transforms infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and gel permeation chromatography (GPC). The release of elements from fertilizer was determined by an inductively coupled plasma (ICP) emission spectrometer. The thermosensitive fertilizers exhibit outstanding stimuli-responsive permeability to encapsulated nutrients, and the release rate of coated elements can be tailored by the ambient temperature. They can release nutrients easily at T < lower critical solution temperature (LCST) but slow at T > LCST. This strategy of grafting thermoresponsive polymer brushes on polydopamine (Pdop)-coated substrates is useful to prepare a stimuli-responsive release system, which can adjust the release rate according to different conditions, and will be effective and promising in the research and development of a stimuli-sensitive controlled-release system.
首次报道了一种基于聚多巴胺接枝聚（N-异丙基丙烯酰胺）双层的温敏释放多元素复合肥料，该双层通过多巴胺化学和表面引发原子转移自由基聚合技术在盐芯上进行包覆，并研究了其对环境温度的养分释放控制。通过透射电子显微镜（TEM）、傅里叶变换红外光谱（FTIR）、热重分析（TGA）和凝胶渗透色谱（GPC）对成功合成的刺激响应肥料进行了确认。通过电感耦合等离子体（ICP）发射光谱仪测定肥料中元素的释放。温敏肥料对封装养分表现出出色的刺激响应渗透性，且涂层元素的释放率可通过环境温度进行调节。在 T < 低临界溶液温度（LCST）时，它们可以轻松释放养分，但在 T > LCST 时则释放缓慢。在聚多巴胺（Pdop）涂层基底上接枝温敏聚合物刷的这种策略可用于制备刺激响应释放系统，该系统可根据不同条件调节释放速率，在刺激敏感控制释放系统的研究和开发中具有有效性和广阔的前景。
