窄带隙聚噻吩衍生物复合热电材料的制备及热电性能

doi:10.7503/cjcu20160110

高等学校化学学报 ›› 2016, Vol. 37 ›› Issue (6): 1161.doi: 10.7503/cjcu20160110

窄带隙聚噻吩衍生物复合热电材料的制备及热电性能

梁安生, 李俊杰, 潘成军(), 王雷()

深圳大学材料学院, 深圳市高分子材料制备重点实验室, 深圳 518060

收稿日期:2016-02-25 出版日期:2016-06-10 发布日期:2016-05-10
作者简介:联系人简介: 潘成军, 男, 博士, 讲师, 主要从事高分子材料的合成与热电性能研究. E-mail:pancj@szu.edu.cn;王雷, 男, 博士, 教授, 主要从事有机与无机复合热电材料研究. E-mail:wl@szu.edu.cn
基金资助:
广东省自然科学基金(批准号: 2015A030313546)资助

Preparation and Thermoelectric Properties of Composites Based on Polythiophene Derivatives with Donor-acceptor Structure^†

LIANG Ansheng, LI Junjie, PAN Chengjun^*(), WANG Lei^*()

Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China

Received:2016-02-25 Online:2016-06-10 Published:2016-05-10
Contact: PAN Chengjun,WANG Lei E-mail:pancj@szu.edu.cn;wl@szu.edu.cn
Supported by:
† Supported by the Natural Science Foundation of Guangdong Province, China(No.2015A030313546)

摘要/Abstract

摘要：

合成了窄带隙的聚(3-甲基噻吩对硝基苯甲烯)(PMTNBQ), 并研究了其热电性能. 通过溶液混合、机械球磨以及冷压成型, 制备了具有不同复合比例的PMTNBQ/石墨(G)的复合热电材料. 研究了石墨含量对PMTNBQ/G复合材料的热电性能的影响. 当石墨含量(质量分数)为90%时, PMTNBQ/G复合热电材料出现了最高的热电优值(ZT)(5.36×10^-3).

关键词: 聚(3-甲基噻吩对硝基苯甲烯), 石墨, 复合材料, 热电材料

Abstract:

Poly{(3-methylthiophene-2,5-diyl)[p-(nitro)benzylidene](3-methylthiophenylene quinodime-thane-2,5-diyl)}(PMTNBQ) with low bandgap was synthesized and its thermoelectric properties were investigated. PMTNBQ/graphite(G) composites were prepared by mixing in solution followed by mechanical ball milling and cold pressing. The thermoelectric properties of the composites were investigated as a function of the graphite to polymer ratios. The highest value of ZT(5.36×10^-3) was obtained for the PMTNBQ/G composite containing 90%(mass fraction) of G. This work suggests that the thermoelectric properties of polymer-inorganic composites can be improved by synthesizing polymers with low band gap.

Key words: Poly{(3-methylthiophene-2, 5-diyl)[p-(nitro)benzylidene](3-methylthiophenylenequinodimethane-2, 5-diyl)}, Graphite, Composite, Thermoelectric material

中图分类号:

TrendMD:

梁安生, 李俊杰, 潘成军, 王雷. 窄带隙聚噻吩衍生物复合热电材料的制备及热电性能. 高等学校化学学报, 2016, 37(6): 1161.

LIANG Ansheng, LI Junjie, PAN Chengjun, WANG Lei. Preparation and Thermoelectric Properties of Composites Based on Polythiophene Derivatives with Donor-acceptor Structure^†. Chem. J. Chinese Universities, 2016, 37(6): 1161.

图/表 13

Scheme 1 Syntheses of PMTNB and PMTNBQ

Fig.1 1H NMR spectrum of PMTNBQ

Fig.2 FTIR spectra of PMTNB(a) and PMTNBQ(b)

Fig.3 Absorption spectrum of PMTNBQ in CHCl3 at room temperature

Fig.4 SEM images of cross-sections of PMTNBQ(A), PMTNBQ/20%G(B), PMTNBQ/40%G(C) and PMTNBQ/70%G(D)

Fig.5 X-Ray diffraction patterns of PMTNBQ and its corresponding compositesa. Intrinsic PMTNBQ; b. PMTNBQ/20%G; c. PMTNBQ/30%G;d. PMTNBQ/50%G; e. PMTNBQ/70%G.

Fig.6 IR spectra of PMTNBQ and its compositesa. Intrinsic PMTNBQ; b. PMTNBQ/20%G;c. PMTNBQ/30%G; d. PMTNBQ/50%G; e. PMTNBQ/70%G.

Fig.7 TGA curves for PMTNBQ and its compositesa. Intrinsic PMTNBQ; b. PMTNBQ/20%G; c. PMTNBQ/30%G; d. PMTNBQ/40%G; e. PMTNBQ/50%G; f. PMTNBQ/60%G; g. PMTNBQ/70%G.

Fig.8 Electrical conductivities of PMTNBQ/G compositesInset is conductivity vs. temperature.

Fig.9 Seebeck coefficients of PMTNBQ/G composites with different G contents Inset is Seebeck conductivity vs. temperature.

Fig.10 Thermal conductivities as a function of different G contents in PMTNBQ/G composites at room temperature

Fig.11 Power factors of PMTNBQ/G composites at different temperatures

Fig.12 ZT values of PMTNBQ/G composites at different temperaturesTemperature/℃: a. 30; b. 60; c. 90; d. 120.

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窄带隙聚噻吩衍生物复合热电材料的制备及热电性能

Preparation and Thermoelectric Properties of Composites Based on Polythiophene Derivatives with Donor-acceptor Structure^†

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窄带隙聚噻吩衍生物复合热电材料的制备及热电性能

Preparation and Thermoelectric Properties of Composites Based on Polythiophene Derivatives with Donor-acceptor Structure†

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Preparation and Thermoelectric Properties of Composites Based on Polythiophene Derivatives with Donor-acceptor Structure^†