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采用非共价法,以β-环糊精(β-CD)为功能单体,异硫氰酸烯丙酯(AITC)为模板分子,2,4-甲苯二异氰酸酯(TDI)为交联剂制备具有缓释AITC功能的分子印迹聚合物(AITC-MIPs)。利用红外光谱法与扫描电镜表征了聚合物的微观结构,确认AITC-MIPs形成。通过AITC-MIPs在不同环境相对湿度、温度下的释放实验,对其缓释功能进行评价。结果表明,在温度65℃,时间12 h,物质的量比β-CD∶AITC∶TDI=5∶1∶30,溶剂体积100 m L条件下,沉淀聚合方法合成AITC-MIPs的得率为55.7%,AITC含量为76.58μL/g。随着相对湿度的升高,AITC的释放呈现上升状态。释放过程用Avrami方程拟合,得出AITC-MIPs的释放遵循限制扩散动力学方程。AITC-MIPs随环境温度的变化不明显,具有良好的热稳定性。
Using non-covalent method, β-cyclodextrin (β-CD) as the functional monomer, allyl isothiocyanate (AITC) as the template molecule, 2,4-toluene diisocyanate (TDI) Preparation of molecularly imprinted polymers (AITC-MIPs) with sustained-release AITC function. The microstructure of the polymer was characterized by infrared spectroscopy and scanning electron microscopy to confirm the formation of AITC-MIPs. AITC-MIPs in different environmental relative humidity and temperature release test, its sustained release function evaluation. The results showed that the yield of AITC-MIPs synthesized by precipitation polymerization was 55.7 at a temperature of 65 ℃ for 12 h with a mass ratio of β-CD: AITC: TDI = 5: 1:30 and a solvent volume of 100 mL %, AITC content of 76.58 μL / g. With the increase of relative humidity, the release of AITC showed an ascending condition. The release process was fitted with the Avrami equation to show that the release of AITC-MIPs follows the diffusion-limited kinetic equation. AITC-MIPs with the ambient temperature is not obvious changes, with good thermal stability.