|
| Preparation and Properties of pH Value-Responsive Sustained Release System of Chlorpyrifos/Copper(Ⅱ)) Schiff Base SBA-15 |
| Author Name | Affiliation | E-mail | | LIN Yue-Shun | Guangzhou Key Laboratory of Efficient Utilization of Agrochemicals, College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China | | | ZHOU Hong-Jun | Guangzhou Key Laboratory of Efficient Utilization of Agrochemicals, College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China | | | ZHOU Xin-Hua | Guangzhou Key Laboratory of Efficient Utilization of Agrochemicals, College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China | cexinhuazhou@163.com | | GONG Sheng | Guangzhou Key Laboratory of Efficient Utilization of Agrochemicals, College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China | | | XU Hua | Guangzhou Key Laboratory of Efficient Utilization of Agrochemicals, College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China | | | CHEN Hua-Yao | Guangzhou Key Laboratory of Efficient Utilization of Agrochemicals, College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China | |
|
| Abstract: Copper Schiff base modified SBA-15(Cu-SBA-15) was prepared by post-grafting, using 3-aminopropyl triethoxysilane (APTES), salicylaldehyde and copper ions as modifying agent. The chlorpyrifos/Cu-SBA-15 (CH-Cu-SBA-15) system were prepared by impregnation method, employing chlorpyrifos as a model drug. The morphologies and structures of SBA-15, amino functionalized SBA-15(NH2-SBA-15), salicylaldehyde functionalized SBA-15(SA-SBA-15), and Cu-SBA-15 were systematically characterized by transmission electron microscopy(TEM), scanning electron microscopy(SEM), X-ray diffraction assay(XRD), N2 adsorption-desorption, TGA analysis, Fourier transform infrared spectroscopy(FTIR) and X-ray photoelectron spectroscopy(XPS). Meanwhile, the adsorption capacity(AC) of as-synthesized system for chlorpyrifos and sustained release performance of SBA-15 before and after modification were investigated. Besides, the sustained release behavior of CH-Cu-SBA-15 under different pH values were also discussed. The results showed that SBA-15 could be modified by APTES and salicylaldehyde, and the order structure of it was still maintained by post-grafting method. After modification of SBA-15, the AC of chlorpyrifos increased from 100 to 195 mg·g-1 with a better sustained release performance. In addition, the CH-Cu-SBA-15 system showed significant sensitivity in response to the pH value. The chlorpyrifos release rate under pH=3 was greater than pH=11 and the sustained release performance of them was relatively better than under the neutral condition. Meanwhile, their releasing curves could be described by Riger-Peppas equation indicating that the drug release was controlled by Fick diffusion. |
| Keywords: SBA-15 copper(Ⅱ) Schiff base pH value responsiveness chlorpyrifos sustained release |
| Hits: 1918 |
| Download times: 914 |
| LIN Yue-Shun,ZHOU Hong-Jun,ZHOU Xin-Hua,GONG Sheng,XU Hua,CHEN Hua-Yao.Preparation and Properties of pH Value-Responsive Sustained Release System of Chlorpyrifos/Copper(Ⅱ)) Schiff Base SBA-15[J].Chinese Journal of Inorganic Chemistry,2017,33(3):446-454. |
| View Full Text View/Add Comment Download reader |
|
|
|
|
|
|
|
|
