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热响应性棒-线圈二嵌段共聚物的制备与表征

Preparation and Characterization of Thermo-Responsive Rod-Coil Diblock Copolymers.

作者信息

Yu Yang-Yen, Chien Wen-Chen, Tsai Chia-Liang

机构信息

Department of Materials Engineering, Ming Chi University of Technology, No. 84, Gongzhuan Rd., Taishan Dist., New Taipei City 24301, Taiwan.

Department of Chemical and Materials Engineering, Chang Gung University, No. 259, Wenhua 1st Rd., Guishan Dist., Taoyuan City 33302, Taiwan.

出版信息

Polymers (Basel). 2017 Aug 4;9(8):340. doi: 10.3390/polym9080340.

DOI:10.3390/polym9080340
PMID:30971016
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6418999/
Abstract

In this study, we synthesized amphiphilic poly(2,7⁻(9,9⁻dioctylfluorene))⁻,⁻(diisopropylamino)ethyl methacrylate (POF⁻⁻PDPMAEMA) rod-coil diblock copolymers by atom transfer radical polymerization (ATRP). The structure and multifunctional sensing properties of these copolymers were also investigated. The POF rod segment length of 10 was fixed and the PDPAEMA coil segment lengths of 90 and 197 were changed, respectively. The micellar aggregates of POF⁻⁻PDPAEMA rod-coil diblock copolymer in water showed a reversible shape transition from cylinder bundles to spheres when the temperature was changed from 20 to 80 °C or the pH was changed from 11 to 2. The atomic force microscopy (AFM) and transmission electron microscopy (TEM) measurements indicated that the temperature had also an obvious influence on the micelle size. In addition, since POF⁻⁻PDPAEMA had a lower critical solution temperature, its photoluminescence (PL) intensity in water is thermoreversible. The PL spectra showed that the POF⁻⁻PDPAEMA copolymer had a reversible on/off profile at elevated temperatures, and thus could be used as an on/off fluorescent indicator for temperature or pH. The fluorescence intensity distribution of pH switched from "off⁻on" to "on⁻off" as the temperature increased. These results showed that the POF⁻PDPAEMA copolymer has a potential application for temperature and pH sensing materials.

摘要

在本研究中，我们通过原子转移自由基聚合（ATRP）合成了两亲性聚（2,7-（9,9-二辛基芴））-甲基丙烯酸二异丙氨基乙酯（POF-PDPMAEMA）棒-线圈二嵌段共聚物。还研究了这些共聚物的结构和多功能传感特性。固定POF棒段长度为10，分别改变PDPAEMA线圈段长度为90和197。当温度从20℃变化到80℃或pH从11变化到2时，POF-PDPAEMA棒-线圈二嵌段共聚物在水中的胶束聚集体呈现从圆柱束到球体的可逆形状转变。原子力显微镜（AFM）和透射电子显微镜（TEM）测量表明温度对胶束尺寸也有明显影响。此外，由于POF-PDPAEMA具有较低的临界溶解温度，其在水中的光致发光（PL）强度是热可逆的。PL光谱表明POF-PDPAEMA共聚物在高温下具有可逆的开/关特性，因此可作为温度或pH的开/关荧光指示剂。随着温度升高，pH的荧光强度分布从“关-开”切换到“开-关”。这些结果表明POF-PDPAEMA共聚物在温度和pH传感材料方面具有潜在应用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cfe/6418999/655f002eba64/polymers-09-00340-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cfe/6418999/a351d37ae530/polymers-09-00340-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cfe/6418999/4d30a7bead9c/polymers-09-00340-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cfe/6418999/946f3e439c6f/polymers-09-00340-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cfe/6418999/3d44ed17cd50/polymers-09-00340-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cfe/6418999/80d283dfdfc1/polymers-09-00340-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cfe/6418999/1bfee019eb45/polymers-09-00340-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cfe/6418999/6bf8c14109b6/polymers-09-00340-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cfe/6418999/3d659a36ed94/polymers-09-00340-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cfe/6418999/d829fe5e1e82/polymers-09-00340-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cfe/6418999/655f002eba64/polymers-09-00340-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cfe/6418999/a351d37ae530/polymers-09-00340-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cfe/6418999/4d30a7bead9c/polymers-09-00340-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cfe/6418999/946f3e439c6f/polymers-09-00340-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cfe/6418999/3d44ed17cd50/polymers-09-00340-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cfe/6418999/80d283dfdfc1/polymers-09-00340-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cfe/6418999/1bfee019eb45/polymers-09-00340-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cfe/6418999/6bf8c14109b6/polymers-09-00340-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cfe/6418999/3d659a36ed94/polymers-09-00340-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cfe/6418999/d829fe5e1e82/polymers-09-00340-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5cfe/6418999/655f002eba64/polymers-09-00340-g010.jpg

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