界面聚合法制备温度响应型缓香壳聚糖基SiO_2纳米胶囊的研究
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- 英文论文题名：Fabrication of Temperature-responsive Chitosan-based SiO_2 nanocapsules for Fragrance Release via Interfacial Polymerization
- 论文作者：范倩倩 ; 马建中 ; 徐群娜
- 英文论文作者：Qianqian Fan ; Jianzhong Ma ; Xunna Xu ; School of Light Industry Science and Engineering ; Shaanxi University of Science & Technology
- 年：2016
- 作者机构：陕西科技大学轻工科学与工程学院;
- 论文关键词：壳聚糖 ; 温度响应 ; 界面聚合 ; 缓香纳米胶囊
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十四分会：超分子组装与软物质材料
- 语种：中文
- 分类号：TQ127.2;TB383.1
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十四分会 ; 超分子组装与软物质材料
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：311k
- 原文格式：D
- 会议级别：全国
摘要
以天然产物壳聚糖为基材,两亲三嵌段共聚物F127胶束为模板,利用界面聚合法制备了包覆香精的温度响应型壳聚糖基SiO_2纳米胶囊。研究了SiO_2前驱体种类、F127用量及偶联剂用量等因素对胶囊结构及性能的影响。利用透射电子显微镜(TEM)及X-射线衍射(XRD)等手段对胶囊的形貌及结构进行了表征。TEM结果表明:当选用正硅酸甲酯为SiO_2前驱体,F127用量为7g/L,且引入硅烷偶联剂时,可成功制备缓香壳聚糖基SiO_2纳米胶囊。所得胶囊具有明显的双壳层结构,平均粒径约为40nm。XRD结果表明:香精已被成功包覆于胶囊中。利用紫外分光光度计测得胶囊对香精的包覆效率为90.5%,香精缓释时间可达120h。与此同时,该胶囊还具有一定的温度响应性:当体系温度从20℃升高至40℃的过程中,胶囊的香精释放速率逐渐降低,这可在一定程度上避免高温下香精挥发较快的问题。
Chitosan-based SiO_2 nanocapsules were crafted using an amphiphilic triblock copolymer F127 as template vi interfacial polymerization. Effects of SiO_2 precursor type, usage of F127 and silane coupling agent o nanocapsules' structure and performance were investigated. The morphology and structure of these nanocapsule were confirmed by transmission electron microscope(TEM) and X-ray diffractrometer(XRD). TEM resul showed that when tetramethoxysilane was used as SiO_2 precursor, F127 usage was 7g/L and silane coupling agen was added, chitosan-based SiO_2 nanocapsules were successfully fabricated. These nanocapsules owne double-shelled structure with average size of 40 nm. XRD results verified that fragrance have been successfull encapsulated into the nanocapsules. UV analysis showed fragrance encapsulating capacity was 90.5%, and flavo duration could reach at 120 h. Notably, the nanocapsules exhibited significant temperature-responsive behavior The fragrance release rate decreased as temperature arise from 20℃ to 40℃, which could inhibit the fast release o fragrance at higher temperature.
Chitosan-based SiO_2 nanocapsules were crafted using an amphiphilic triblock copolymer F127 as template vi interfacial polymerization. Effects of SiO_2 precursor type, usage of F127 and silane coupling agent o nanocapsules' structure and performance were investigated. The morphology and structure of these nanocapsule were confirmed by transmission electron microscope(TEM) and X-ray diffractrometer(XRD). TEM resul showed that when tetramethoxysilane was used as SiO_2 precursor, F127 usage was 7g/L and silane coupling agen was added, chitosan-based SiO_2 nanocapsules were successfully fabricated. These nanocapsules owne double-shelled structure with average size of 40 nm. XRD results verified that fragrance have been successfull encapsulated into the nanocapsules. UV analysis showed fragrance encapsulating capacity was 90.5%, and flavo duration could reach at 120 h. Notably, the nanocapsules exhibited significant temperature-responsive behavior The fragrance release rate decreased as temperature arise from 20℃ to 40℃, which could inhibit the fast release o fragrance at higher temperature.
引文
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