Synthesis, Morphology, and Sensory Applications of Multifunctional Rod鈥揅oil鈥揅oil Triblock Copolymers and Their Electrospun Nanofibers
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- 作者：Yu-Cheng Chiu ; Yougen Chen ; Chi-Ching Kuo ; Shih-Huang Tung ; Toyoji Kakuchi ; Wen-Chang Chen
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2012
- 出版时间：July 25, 2012
- 年：2012
- 卷：4
- 期：7
- 页码：3387-3395
- 全文大小：653K
- 年卷期：v.4,no.7(July 25, 2012)
- ISSN：1944-8252
文摘
We report the synthesis, morphology, and applications of conjugated rod鈥揷oil鈥揷oil triblock copolymers, polyfluorene-block-poly(N-isopropylacrylamide)-block-poly(N-methylolacrylamide) (PF-b-PNIPAAm-b-PNMA), prepared by atom transfer radical polymerization first and followed by click coupling reaction. The blocks of PF, PNIPAAm, and PNMA were designed for fluorescent probing, hydrophilic thermo-responsive and chemically cross-linking, respectively. In the following, the electrospun (ES) nanofibers of PF-b-PNIPAAm-b-PNMA were prepared in pure water using a single-capillary spinneret. The SAXS and TEM results suggested the lamellar structure of the PF-b-PNIPAAm-b-PNMA along the fiber axis. These obtained nanofibers showed outstanding wettability and dimension stability in the aqueous solution, and resulted in a reversible on/off transition on photoluminescence as the temperatures varied. Furthermore, the high surface/volume ratio of the ES nanofibers efficiently enhanced the temperature-sensitivity and responsive speed compared to those of the drop-cast film. The results indicated that the ES nanofibers of the conjugated rod鈥揷oil block copolymers would have potential applications for multifunctional sensory devices.