Thermoelectric properties of dispersant-free semiconducting single-walled carbon nanotubes sorted by a flavin extraction method

2019 ◽  
Vol 55 (18) ◽  
pp. 2636-2639 ◽  
Author(s):  
W. Huang ◽  
F. Toshimitsu ◽  
K. Ozono ◽  
M. Matsumoto ◽  
A. Borah ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermoelectric Properties ◽  
Power Factor ◽  
Extraction Method ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Flavin extraction method realized an improved power factor by easy removal of the dispersant from semiconducting SWNT sheet.

scholarly journals Thermoelectric Properties of Thin Films from Sorted Single-Walled Carbon Nanotubes

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3808 ◽  
Author(s):  
Blazej Podlesny ◽  
Bogumila Kumanek ◽  
Angana Borah ◽  
Ryohei Yamaguchi ◽  
Tomohiro Shiraki ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermoelectric Properties ◽  
Large Scale ◽  
Single Walled Carbon Nanotubes ◽  
Parent Material ◽  
Free Standing ◽  
Two Phase ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes ◽  
Aqueous Two Phase Extraction

Single-walled carbon nanotubes (SWCNTs) remain one of the most promising materials of our times. One of the goals is to implement semiconducting and metallic SWCNTs in photonics and microelectronics, respectively. In this work, we demonstrated how such materials could be obtained from the parent material by using the aqueous two-phase extraction method (ATPE) at a large scale. We also developed a dedicated process on how to harvest the SWCNTs from the polymer matrices used to form the biphasic system. The technique is beneficial as it isolates SWCNTs with high purity while simultaneously maintaining their surface intact. To validate the utility of the metallic and semiconducting SWCNTs obtained this way, we transformed them into thin free-standing films and characterized their thermoelectric properties.

Enhancing the Thermoelectric Performance through the Mutual Interaction between Conjugated Polyelectrolytes and Single-walled Carbon Nanotubes

2022 ◽  
Author(s):  
Shuxun Wan ◽  
Zhongming Chen ◽  
Liping Hao ◽  
Shichao Wang ◽  
Benzhang Li ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermoelectric Properties ◽  
Thermoelectric Generator ◽  
Composite Films ◽  
Single Walled Carbon Nanotubes ◽  
Conjugated Polyelectrolytes ◽  
High Performing ◽  
Single Walled Carbon ◽  
Electrical Conductivities ◽  
Walled Carbon Nanotubes

Abstract We present a method of constructing composites composed of conjugated polyelectrolytes (CPEs) and single-walled carbon nanotubes (SWCNTs) to obtain a high-performing flexible thermoelectric generator. In this approach, three kinds of polymers, namely, poly[(1,4-(2,5-didodecyloxybenzene)-alt-2,5-thiophene] (P1), poly[(1,4-(2,5-bis-sodium butoxysulfonate-phenylene)-alt-2,5-thiophene] (P2), and poly[(1,4-(2,5-bis-acid butoxysulfonic-phenylene)-alt-2,5-thiophene] (P3) are designed, synthesized and complexed with SWCNTs as thermoelectric composites. The electrical conductivities of CPEs/SWCNTs (P2/SWCNTs, and P3/SWCNTs) nanocomposites are much higher than those of non-CPEs/SWCNTs (P1/SWCNTs) nanocomposites. Among them, the electrical conductivity of P2/SWCNTs with a ratio of 1:4 reaches 3686 S cm-1, which is 12.4 times that of P1/SWCNTs at the same SWCNT mass ratio. Moreover, CPEs/SWCNTs composites (P2/SWCNTs) display remarkably improved thermoelectric properties with the highest power factor (PF) of 163 μW m-1 K-2. In addition, a thermoelectric generator is fabricated with P2/SWCNTs composite films, and the output power and power density of this generator reach 1.37 μW and 1.4 W m-2 (cross-section) at ΔT=70 K. This result is over three times that of the thermoelectric generator composed of non-CPEs/SWCNTs composite films (P1/SWCNTs, 0.37 μW). The remarkably improved electrical conductivities and thermoelectric properties of the CPEs/SWCNTs composites (P2/SWCNTs) are attributed to the enhanced interaction. This method for constructing CPEs/SWCNTs composites can be applied to produce thermoelectric materials and devices.

scholarly journals Preparation and Thermoelectric Properties of Semiconducting Single-Walled Carbon Nanotubes/Regioregular Poly(3-dodecylthiophene) Composite Films

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2720
Author(s):  
Mengdi Wang ◽  
Qin Yao ◽  
Sanyin Qu ◽  
Yanling Chen ◽  
Hui Li ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Transport Properties ◽  
Thermoelectric Properties ◽  
Composite Films ◽  
Single Walled Carbon Nanotubes ◽  
Dispersion Phase ◽  
Single Walled Carbon ◽  
Seebeck Coefficients ◽  
Regioregular Poly ◽  
Walled Carbon Nanotubes

Single-walled carbon nanotubes (SWNTs) have been widely used as leading additives for improving the thermoelectric properties of organic materials, due to their unique structure and excellent electronic transport properties. However, the as-synthesized SWNTs are mixtures (mix-SWNT) of semiconducting (sc-SWNT) and metallic (met-SWNT) carbon nanotubes. The significantly different surface character and transport behavior of sc-SWNT and met-SWNT frequently raise the difficulty of modifying microstructures, and tuning transport properties of SWNTs/organic composites, when using mix-SWNTs as dispersion phase. Herein, we prepared high quality sc-SWNTs/rr-P3DDT composite film by presorting pure sc-SWNT from the raw mix-SWNTs using regioregular poly(3-dodecylthiophene) (rr-P3DDT). Both the smoothness and compactness of sc-SWNTs/rr-P3DDT are great improved, as compared with the mix-SWNTs/rr-P3DDT films, and the sc-SWNTs are well-dispersed and uniformly wrapped by rr-P3DDT with diameter less than 50 nm. The significantly enhanced Seebeck coefficients and power factors are obtained in the sc-SWNT/rr-P3DDT samples. As the result, the maximum power factor of 60 μW/mK2 in 50 wt% sc-SWNTs sample is 70% higher than that of mix-SWNTs/P3DDT sample. This work reveals the effectiveness of pure semiconductor SWNTs as fillers to optimize the thermoelectric properties of CNT/polymer nano-composites.

Structural and Thermoelectric Properties of Optically Transparent Thin Films Based on Single-Walled Carbon Nanotubes

2018 ◽  
Vol 60 (12) ◽  
pp. 2649-2655 ◽  
Author(s):  
I. A. Tambasov ◽  
A. S. Voronin ◽  
N. P. Evsevskaya ◽  
M. N. Volochaev ◽  
Yu. V. Fadeev ◽  
...  
Keyword(s):  
Thin Films ◽  
Carbon Nanotubes ◽  
Thermoelectric Properties ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Optically Transparent ◽  
Walled Carbon Nanotubes

Application and Research of Nursing Products Based on Single Wall Carbon Nanotubes in Personal Health Care

2021 ◽  
Vol 21 (2) ◽  
pp. 1042-1047
Author(s):  
Xiaowei Li ◽  
Wenbo Zhao ◽  
Dong Zhao ◽  
Hongyan Jing
Keyword(s):  
Carbon Nanotubes ◽  
Extraction Method ◽  
Personal Care Products ◽  
Single Walled Carbon Nanotubes ◽  
Raw Material ◽  
Single Wall Carbon Nanotubes ◽  
Personal Care ◽  
Separation And Purification ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Single walled carbon nanotubes have special chemical and physical properties, at the same time, they have the advantage of macro maneuverability in maneuverability, so they have the potential of multi-functional applications. At present, composite materials, super capacitors and corresponding personal care products based on carbon nanotubes are widely used in all aspects of people’s lives, and these products have obvious functional advantages. In this paper, based on the application of single-walled carbon nanotubes technology in personal care products, the separation and purification of ginsenoside pods, the raw material of high-end washing and care products, was studied. In order to enhance the conductivity and tensile strength of SWNTs, this paper innovatively introduces the purification method of current acid treatment to enhance the performance of SWNTs. Based on the improved single-walled carbon nanotubes technology, the extraction efficiency of the optimized single-walled carbon nanotubes was analyzed. In the end of this paper, the optimized extraction method of ginsenoside pods from SWNTs is compared with the traditional extraction method. The experimental results show that SWNTs has obvious time efficiency advantage.

Purification of Single-Walled Carbon Nanotubes Using a Supercritical Fluid Extraction Method

2007 ◽  
Vol 111 (35) ◽  
pp. 13007-13012 ◽  
Author(s):  
Joanna S. Wang ◽  
Chien M. Wai ◽  
Kenichi Shimizu ◽  
Frank Cheng ◽  
John J. Boeckl ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Extraction Method ◽  
Single Walled Carbon Nanotubes ◽  
Fluid Extraction ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Aniline–pyrrole copolymers formed on single-walled carbon nanotubes with enhanced thermoelectric performance

2021 ◽  
Author(s):  
Wentao Lu ◽  
Sixing Yin ◽  
Xin Wu ◽  
Qunyi Luo ◽  
Erqiang Wang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Power Factor ◽  
Room Temperature ◽  
Single Walled Carbon Nanotubes ◽  
Thermoelectric Performance ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes ◽  
Poly Aniline

Poly(aniline-co-pyrrole) formed on SWCNTs via electropolymerization affords a greatly enhanced power factor of 111.4 ± 3.2 μW m−1 K−2 at room temperature.

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