化工进展 ›› 2015, Vol. 34 ›› Issue (1): 183-187,244.DOI: 10.16085/j.issn.1000-6613.2015.01.032

• 材料科学与技术 • 上一篇    下一篇

分子识别型智能微囊的制备及其控制释放特性

杨超, 谢锐, 巨晓洁, 汪伟, 褚良银   

  1. 四川大学化学工程学院, 四川 成都 610065
  • 收稿日期:2014-04-28 修回日期:2014-05-28 出版日期:2015-01-05 发布日期:2015-01-05
  • 通讯作者: 谢锐,副教授,博士生导师,主要从事智能膜材料、微流控技术方面的研究。E-mail xierui@scu.edu.cn。
  • 作者简介:杨超(1988-),男,硕士研究生,研究分子识别智能微囊材料。
  • 基金资助:

    教育部新世纪优秀人才支持计划(NCET-11-0352)及四川大学优秀青年学者科研基金(2011SCU04A15)项目。

Fabrication and controlled-release characteristics of molecular-recognizable smart microcapsules

Yang Chao, Xie Rui, Ju Xiaojie, Wang Wei, Chu Liangyin   

  1. School of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China
  • Received:2014-04-28 Revised:2014-05-28 Online:2015-01-05 Published:2015-01-05

摘要: 采用微流控乳化和紫外光照引发制备聚(N-异丙基丙烯酰胺-共聚-丙烯酸)微囊,然后通过缩合反应将氨基化β-环糊精(ECD)引入微囊成功制备得到聚(N-异丙基丙烯酰胺-共聚-丙烯酸/氨基化β-环糊精)(PNA-ECD)微囊。PNA-ECD微囊具有明显的核壳型结构和良好的单分散性。微囊的平均直径为470μm,CV值为2.98%。PNA-ECD微囊在识别模型芳环分子8-苯胺-1-萘磺酸铵盐(ANS)后能等温收缩从而实现对内载药物的控制释放。32℃时,微囊内部的模型药物异硫氰酸荧光素标记葡聚糖(FITC-dextran)在纯水中无明显释放,而在加入2.0mmol/L ANS溶液16min后,微囊内部约70%的FITC-dextran释放到微囊外部。研究结果对制备单分散分子识别型智能微囊及研究其控制释放特性提供有价值的理论指导和实验基础。

关键词: 微囊, 分子识别, 控制释放, 微流体学, 乳液, 传质, 微囊, 分子识别, 控制释放, 微流体学, 乳液, 传质

Abstract: Poly(N-isopropylacrylamide-co-acrylic acid/aminated β-cyclodextrin) (PNA-ECD) microcapsules were fabricated by the condensation reaction between aminated β-cyclodextrin and poly(N-isopropylacrylamide-co-acrylic acid) microcapsules. The poly(N-isopropylacrylamide-co- acrylic acid) microcapsules were prepared by initiating polymerization of multiple emulsion containing N-isopropylacrylamide and acrylic acid, which was generated by microfluidic emulsification. The PNA-ECD microcapsules showed core-shell structure and satisfactory monodispersity. Average outer diameter of microcapsules was 470 μm, and CV value was 2.98%. By recognizing model molecules 8-anilino-1-naphthalenesulfonic acid ammonium salt (ANS), the PNA-ECD microcapsules isothermally shrunk and controllably released the encapsulated model drug molecule fluorescein isothiocyanate labeled dextran (FITC-dextran). At 32℃, there was no obvious drug release for the PNA-ECD microcapsules in pure water, while about 70% of the encapsulated FITC-dextran was released from the microcapsules after adding ANS solution (2.0mmol/L) for 16min. The results provide valuable guidance for fabrication of monodisperse molecular-recognizable microcapsules and studying their molecular-recognizable characteristics.

Key words: microcapsules, molecular recognition, controlled release, microfluidics, emulsions, mass transfer, microcapsules, molecular recognition, controlled release, microfluidics, emulsions, mass transfer

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