光致聚合物
材料科学
聚合
自愈水凝胶
泊洛沙姆
聚乙二醇
曙红
纳米颗粒
化学工程
药物输送
纳米技术
高分子化学
聚合物
复合材料
共聚物
病理
工程类
染色
医学
作者
Kihak Gwon,Eun‐Jung Jo,Abhishek Sahu,Jae Young Lee,Min‐Gon Kim,Giyoong Tae
标识
DOI:10.1016/j.msec.2018.04.029
摘要
In situ hydrogel synthesis based on photopolymerization has been recognized as a promising strategy that can be used for tissue augmentation. In this study, we developed an efficient in situ gelation method to prepare bulk hydrogels via near infrared (NIR)-mediated photopolymerization using acrylated polyethylene glycol and diacrylated Pluronic F127-coated upconversion nanoparticles (UCNPs). In our system, upon 980-nm laser irradiation, UCNPs transmit visible light, which triggers the activation of eosin Y to initiate polymerization. We found that the UCNPs coated with diacrylated Pluronic F127 can enhance the photopolymerization efficiency and thus enable the production of bulk hydrogel with requirement of a lower NIR light power compared to that required with the bare UCNPs. This photopolymerization approach will be beneficial to achieve in situ polymerization in vivo for various biomedical applications such as cell/drug delivery and construction of tissue augments.
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