利用近红外波长对物理交联水凝胶进行光诱导重塑
Light-Induced Remodeling of Physically Crosslinked Hydrogels Using Near-IR Wavelengths.
作者信息
Zhu Congcong, Bettinger Christopher J
机构信息
Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA.
Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA.
出版信息
J Mater Chem B. 2014 Mar 28;2(12):1613-1618. doi: 10.1039/C3TB21689F. Epub 2014 Jan 28.
Abstract
Poly([6-bromo-7-hydroxycoumarin-4-yl]methyl methacrylate)-based triblock copolymers were synthesized by first preparing PMAA-PEG-PMAA triblocks using ATRP. 6-Bromo-4-chloromethyl-7-hydroxycoumarin was conjugated to PMAA-PEG-PMAA using 1,8-diazabicycloundec-7-ene (DBU). Rheological measurements were conducted using a HR-2 rheometer with a UV illumination accessory (TA Instruments). Single-photon uncaging was performed as previously described. Two-photon uncaging was performed using a LSM (Zeiss) equipped with a Ti: Sapphire laser (Coherent). All values reported as mean ± std. dev. unless otherwise stated. See Supporting Information for experimental details.
摘要
基于聚（甲基丙烯酸[6-溴-7-羟基香豆素-4-基]甲酯）的三嵌段共聚物通过首先使用原子转移自由基聚合（ATRP）制备聚甲基丙烯酸（PMAA）-聚乙二醇（PEG）-聚甲基丙烯酸（PMAA）三嵌段来合成。使用1,8-二氮杂双环[5.4.0]十一碳-7-烯（DBU）将6-溴-4-氯甲基-7-羟基香豆素与PMAA-PEG-PMAA共轭。使用配备紫外线照明附件的HR-2流变仪（TA仪器公司）进行流变学测量。单光子解笼按照先前描述的方法进行。双光子解笼使用配备钛宝石激光器（相干公司）的激光扫描显微镜（蔡司公司）进行。除非另有说明，所有值均报告为平均值±标准差。实验细节见支持信息。
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