氨基修饰的锆基金属有机框架材料对香料的吸附和缓控释

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英文篇名：A zirconium-based and amine-functionalized metal-organic framework material for adsorption and controlled release of fragrance 作者：刘宇航 ; 周珠贤 ; 江黎明 ; 申有青 英文作者：Yuhang Liu;Zhuxian Zhou;Liming Jiang;Youqing Shen;Key Laboratory of Biomass Chemical Engineering of Ministry of Education and Center for Bionanoengineering, College of Chemical and Biological Engineering, Zhejiang University;MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University; 关键词：有机金属框架材料 ; 香料 ; 吸附 ; 控释 英文关键词：MOF;;fragrance;;adsorption;;control release 中文刊名：JBXK 英文刊名：Scientia Sinica(Chimica) 机构：浙江大学化学工程与生物工程学院生物质化工教育部重点实验室;浙江大学高分子科学与工程学系高分子合成与功能构造教育部重点实验室; 出版日期：2018-11-29 14:03 出版单位：中国科学:化学 年：2019 期：v.49 基金：国家重点研发计划纳米科技重点专项(编号:2016YFA0200300)资助项目 语种：中文; 页：JBXK201904006 页数：6 CN：04 ISSN：11-5838/O6 分类号：41-46

摘要

本文以氨基修饰的锆基金属有机框架材料(MOF) UiO-66-NH_2为香料载体,研究了其对一系列香料分子的吸附和释放行为.我们发现UiO-66-NH_2对非极性的萜类香料吸附几乎无差别,而在极性香料的酯类吸附上差异较大.我们通过扫描电子显微镜(SEM)、X射线衍射仪(XRD)和红外光谱(FTIR)等对UiO-66-NH_2吸附香料后的样品进行表征,结果表明MOF材料吸附香料后不会造成结构坍塌和晶型变化, UiO-66-NH_2中的氨基与不同的酯类香料可形成氢键,对提高吸附量和延长缓释效果起到积极促进作用.与传统吸附材料活性炭相比, MOF对香料有更好的吸附效果.我们使用顶空-气相色谱对酯类香料的释放进行检测,结合释放动力学模型分析,发现其释放行为符合Korsmeyer-Peppas模型,孔道扩散是其释放的限速性环节.
        In this paper, we studied the adsorption and release behavior of various fragrant molecules to zirconiumbased and amine-functionalized metal-organic framework materials(MOF) UiO-66-NH_2. The results showed that UiO-66-NH_2 has almost no difference in the adsorption of non-polar terpenoid fragrances, but there is significant difference in the adsorption of polar ester fragrance. The fragrance-adsorbed UiO-66-NH_2 was characterized by SEM, PXRD and FTIR. No structural collapse and crystal form change was found after the adsorption of fragrant molecules. Amine groups in UiO-66-NH_2 can form hydrogen bonds with different ester fragrance, which favor the adsorption and sustain release of fragrance. These MOF materials showed much higher adsorption capacity to fragrant molecules than the traditional adsorbent activated carbon. The release kinetics of ester fragrance was studied by headspace-gas chromatography. It was found the release kinetics was consistent with the Korsmeyer-Peppas model and the pore diffusion was the rate-limiting state of its release.

引文

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