Thermochromic behaviors and crystallinity estimations of poly(3-hexylthiophene) in fine nanoparticles prepared by reprecipitation method
Thermochromic behaviors and crystallinity estimations of poly(3-hexylthiophene) in fine nanoparticles prepared by reprecipitation method
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再沉淀法制备的细纳米粒子中聚（3-己基噻吩）的热致变色行为和结晶度评估
DOI：
10.1080/15421406.2019.1648044
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Takahiro Seki
中科院分区：
文献类型：
--
作者：
Kota Suetsugu;Mitsuo Hara;Shusaku Nagano;Keiji Shito;Toshimitsu Sato;Akito Masuhara;Takahiro Seki
采用再沉淀法制备了不同分子量的聚3-己基噻吩（P3 HT）纳米粒子。通过动态光散射测量和场效应扫描电子显微镜观察，估计纳米颗粒的粒径约为30 nm。纳米粒子分散体表现出热致变色行为。在25 °C下观察到对应于P3 HT结晶相的吸收带。随着温度的升高，归因于晶相的频带减少，而归因于非晶相的频带增加。纳米颗粒分散体在95 °C下的光谱与溶液状态下的光谱几乎相同。通过比较对应于结晶相和非晶相的吸收光谱的区域，发现纳米颗粒的结晶度强烈地依赖于分子量。
Nanoparticles of regioregular poly(3-hexylthiophene) (P3HT) with different molecular weights were prepared by reprecipitation method. Particle sizes of the nanoparticles were estimated approximately 30 nm by dinamic light scattering measurement and field effect scanning electron microscope observation. The nanoparticle dispersions exhibited thermochromic behaviors. Absorption bands corresponding to the P3HT crystalline phase were observed at 25 °C. As temperature increased, the bands ascribed to the crystalline phase were decreased and those due to the amorphous phase increased. The spectra of the nanoparticle dispersions at 95 °C were almost the same as those in the solution state. By comparing to areas of absorption spectra corresponding to the crystalline and amorphous phase, it was found that the crystallinity of the nanoparticles was strongly dependent on the molecular weight.