| 香草醛分子印迹聚合物微球的合成及表征 |
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| 引用本文： | 孙智纯,王兵,单娟娟,司汇通.香草醛分子印迹聚合物微球的合成及表征[J].现代食品科技,2015,31(9):132-137. |
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| 作者姓名： | 孙智纯 王兵 单娟娟 司汇通 |
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| 作者单位： | （天津工业大学中空纤维膜材料与膜过程省部共建国家重点实验室培育基地，天津工业大学环境与化学工程学院，天津 300387）,（天津工业大学中空纤维膜材料与膜过程省部共建国家重点实验室培育基地，天津工业大学环境与化学工程学院，天津 300387）,（天津工业大学中空纤维膜材料与膜过程省部共建国家重点实验室培育基地，天津工业大学环境与化学工程学院，天津 300387）,（天津工业大学中空纤维膜材料与膜过程省部共建国家重点实验室培育基地，天津工业大学环境与化学工程学院，天津 300387） |
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| 基金项目： | 天津市自然科学基金资助项目(13JCQNJ C02600) |
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| 摘 要： | 香草醛作为食品中一种重要的调味剂,可以从热带兰花香荚兰的种子中找到。本文以香草醛(VAN)为模板分子,a-甲基丙烯酸(MAA)为功能单体,乙二醇二甲基丙烯酸酯(EGDMA)为交联剂,二甲基亚砜(DMSO)为溶剂,分别采用沉淀聚合法、悬浮聚合法、本体聚合法制备了香草醛分子印迹聚合物(微球)(MIPs)。通过紫外光谱(UV)、傅里叶变换红外光谱仪(FT-IR)研究了模板分子与功能单体之间的相互作用和最佳配比,利用透射电子显微镜考察了分子印迹聚合物的微观形貌。采用平衡和等温吸附实验对印迹聚合物的吸附性能进行了研究。实验表明,MAA与VAN之间通过氢键相互作用,沉淀聚合法制备的MIPs具有均匀规则的球状结构,且表现出对VAN更好的结合能力,具有较高的特异识别性。
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| 关 键 词： | 香草醛 沉淀聚合 分子印迹聚合物微球 特异性识别 |
| 收稿时间： | 2014/11/12 0:00:00 |
Preparation and Characterization of Vanillin Molecularly Imprinted Polymer Microspheres |
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| SUN Zhi-chun,WANG Bing,SHAN Juan-juan and SI Hui-tong.Preparation and Characterization of Vanillin Molecularly Imprinted Polymer Microspheres[J].Modern Food Science & Technology,2015,31(9):132-137. |
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| Authors: | SUN Zhi-chun WANG Bing SHAN Juan-juan and SI Hui-tong |
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| Affiliation: | (State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China.),(State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China.),(State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China.) and (State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China.) |
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| Abstract: | Vanillin is an important flavoring agent that is mainly obtained from the seedpods of the tropical orchid, Vanilla planifolia. Molecularly imprinted polymer microspheres (MIPs) were synthesized by precipitation polymerization, suspension polymerization, and bulk polymerization using vanillin as the template molecule, methacrylic acid (MAA) as the functional monomer, ethylene glycol dimethacrylate (EGDMA) as the cross-linker, and dimethyl sulfoxide as the solvent. The interaction between vanillin and MAA of vanillin in MIPs and the best molar ratios were studied using UV spectroscopy and Fourier transform infrared spectroscopy (FT-IR). In addition, their microstructure was observed by transmission electron microscopy (TEM). Equilibrium adsorption and isothermal adsorption experiments were carried out to investigate the vanillin-binding capacities of the polymers. The results indicated that MAA and vanillin interacted via hydrogen bonding. Furthermore, the MIPs synthesized by precipitation polymerization were regularly shaped and had relatively high specificity for the recognition of vanillin. |
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| Keywords: | vanillin precipitation polymerization molecularly imprinted polymer microspheres specific recognition |
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