Polyurea microcapsules with a photocleavable shell: UV-triggered release
Polyurea microcapsules with a photocleavable shell: UV-triggered release
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DOI：
10.1039/c2py20735d
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发表时间：
2013-01
影响因子：
4.6
通讯作者：
Tuğba Dışpınar;Catheline A. L. Colard;F. D. Prez
中科院分区：
文献类型：
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作者：
Tuğba Dışpınar;Catheline A. L. Colard;F. D. Prez
我们报告了可光裂解聚脲微胶囊的制备和表征。首先，合成了带有光不稳定的6-硝基藜酰氧基羰基的异氰酸酯末端官能化低聚物。然后将该低聚物与二亚乙基三胺结合用于制备聚脲微胶囊。在稳定的水包油乳液体系中通过界面聚合制备了负载疏水性染料溶液并由致密胶囊壳组成的聚脲微胶囊（50-300μm）。由于分子内光裂解机制，紫外触发的光裂解胶囊壳在溶液和固态中均发生破裂，从而成功释放封装的液体核心。
We report the preparation and characterization of photocleavable polyurea microcapsules. First, an isocyanate end functionalized oligomer, bearing the photolabile 6-nitroveratroyloxycarbonyl group was synthesized. This oligomer, in combination with diethylenetriamine, was then utilized in the preparation of polyurea microcapsules. Polyurea microcapsules (50–300 μm) loaded with a hydrophobic dye solution and consisting of a dense capsule shell were prepared via an interfacial polymerization in a stable oil-in-water emulsion system. Thanks to the intra-molecular photocleavage mechanism, the UV-triggered rupture of the photocleavable capsule shell occurred both in the solution and in the solid state, leading to the successful release of the encapsulated liquid core.