Efficient carbon nanotube/polyimide composites exhibiting tunable temperature coefficient of resistance for multi-role thermal films

Wei, Gao; Zhang, Zhonggang; Yu, Zhong‐Zhen; Ma, Binghe; Luo, Jian; Deng, Jinjun; Yuan, Weizheng

doi:10.1016/j.compscitech.2020.108333

Cited by 24 publications

(14 citation statements)

References 54 publications

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“…It should be pointed out that the TCRs of the CNT composite films in this paper were lower than MWCNT-coated fabrics or MWCNT buck paper. The shorter, looser accumulation and lower content of CNT aggregations usually have higher TCR values [ 3 , 10 , 32 , 33 , 34 ]. However, CNT film is an ideal reinforcement for structure–function integration applications, which has a tensile strength and modulus of 186 MPa and 3.2 GPa [ 29 ], respectively.…”

Section: Resultsmentioning

confidence: 99%

“…However, CNT film is an ideal reinforcement for structure–function integration applications, which has a tensile strength and modulus of 186 MPa and 3.2 GPa [ 29 ], respectively. CNT/E51-DAD films show similar TCRs to that of 3.6 × 10 −4 °C −1 of MWCNT/epoxy composite film synthesized by CCVD, which also had a high CNT purity of >95% [ 33 , 34 ], which suggests that the CNT film has excellent temperature dependence of electrical resistance to monitor the composite forming process and has the potential for the structure–function integration of composites.…”

Section: Resultsmentioning

confidence: 99%

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Temperature Dependence of Electrical Resistance in Carbon Nanotube Composite Film during Curing Process

Xing

Wang

et al. 2022

Nanomaterials

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Carbon nanotube (CNT) film possesses excellent mechanical and piezoresistivity, which may act as a sensor for process monitoring and reinforcement of the final composite. This paper prepared CNT/epoxy composite film via the solution dipping method and investigated the electrical resistance variation (ΔR/R0) of CNT/epoxy composite film during the curing process. The temperature dependence of electrical resistance was found to be closely related to resin rheological properties, thermal expansion, and curing shrinkage. The results show that two opposing effects on electrical resistivity occur at the initial heating stage, including thermal expansion and condensation caused by the wetting tension of the liquid resin. The lower resin content causes more apparent secondary impregnation and electrical resistivity change. When the resin viscosity remains steady during the heating stage, the electrical resistance increases with an increase in temperature due to thermal expansion. Approaching gel time, the electrical resistance drops due to the crosslink shrinkage of epoxy resin. The internal stress caused by curing shrinkage at the high-temperature platform results in an increase in electrical resistance. The temperature coefficient of resistance becomes larger with an increase in resin content. At the isothermal stage, an increase in ΔR/R0 value becomes less obvious with a decrease in resin content, and ΔR/R0 even shows a decreasing tendency.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Temperature Dependence of Electrical Resistance in Carbon Nanotube Composite Film during Curing Process

Xing

Wang

et al. 2022

Nanomaterials

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“…53,172,173 Furthermore, the bolometric properties of the films can also be improved via surface functionalization chemically or via thermal treatment, i.e., thermal annealing. 65,174,175 Thus, the quest to explore more and more in the field of IR BM and the advantages that MWCNTs provide over their counterpart IR-detecting materials has triggered researchers to work toward MWCNTbased IR BMs. Among the early works on MWCNTs, in 2010, Lu et al reported an IR BM on random MWCNT film (CVD grown) fabricated by vacuum filtration.…”

Section: { }mentioning

confidence: 99%

“…Second, these naturally suspended cylinders are in thermal isolation with the environment, which, in turn, provide an improved bolometric response . Third, MWCNTs film are effective template for nanoparticle deposition, have more mechanical stability with large weight-to-strength ratio, and therefore help in fabricating suspended films. ,, Furthermore, the bolometric properties of the films can also be improved via surface functionalization chemically or via thermal treatment, i.e., thermal annealing. ,, Thus, the quest to explore more and more in the field of IR BM and the advantages that MWCNTs provide over their counterpart IR-detecting materials has triggered researchers to work toward MWCNT-based IR BMs.…”

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confidence: 99%

Carbon Nanotube-Based Uncooled Bolometers: Advances and Progress

Nandi

Misra

2022

ACS Materials Lett.

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Discovery of infrared radiation (IR) was an important step in understanding the hidden secrets of nature, which could be unraveled only after "seeing" this invisible spectrum. This curiosity led to the development of "artif icial eyes", the so-called optoelectronic devices (OEDs). Among them, bolometers (BMs) were a special class of OEDs used to detect IR and, thus, collect the hidden information. The gradual progress of human civilization and scientific curiosity led to the discovery of various materials which were looked upon as the ultimate IR bolometric material. Carbon nanotube (CNT) was one of them, which, soon after its discovery, hinted toward its potential application toward IR BM. Its blackbody characteristics, high thermal conductivity, low thermal capacity, and high mechanical and chemical stability turned out to be the ideal characteristics for the BM. This Review aims to discuss the different class of bolometric materials and then elaborating CNT-based BMs exclusively. Various adopted methodologies, both from material as well as design perspectives are discussed intensively, and the technological progress is presented over the years.

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“…Many temperature-sensitive conductive composites have been developed, including metal nanoparticles/nanowires, 25,26 graphene, [27][28][29] reduced graphene oxide (rGO), 30,31 carbon nanotubes (CNTs), 32,33 and poly (3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). [34][35][36] Honda et al 37 printed CNT, PEDOT: PSS and a PEDOT:PSS/CNT combination ink on Kapton.…”

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Superhydrophobic, Oleophobic, Self-Cleaning Flexible Wearable Temperature Sensing Device

et al. 2022

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We used a poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)/carbon nanotube (CNT) composite as a temperature sensing layer, and the device exhibited a high sensitivity of -2.46%/°C. A sandpaper-molded PDMS with fluorinated surface modification protection layer was used as the superhydrophobic, oleophobic, self-cleaning protective encapsulation layer. This device exhibits a self-cleaning function when it makes contact with liquids such as water, tea, coffee, and milk. In addition, the surface can also repel liquids with low surface tension (such as oil), exhibiting good oleophobicity. Resistance to ultrasonication in an organic solvent for 120 min and a 400-cycle tape peel test reveal durability of this device. The device functions under similar conditions after 1000 bending cycles with a bending radius of 0.875 mm. In this work, we demonstrate a simple and low-cost technique to fabricate durable and wearable temperature sensing devices.

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Efficient carbon nanotube/polyimide composites exhibiting tunable temperature coefficient of resistance for multi-role thermal films

Cited by 24 publications

References 54 publications

Temperature Dependence of Electrical Resistance in Carbon Nanotube Composite Film during Curing Process

Temperature Dependence of Electrical Resistance in Carbon Nanotube Composite Film during Curing Process

Carbon Nanotube-Based Uncooled Bolometers: Advances and Progress

Superhydrophobic, Oleophobic, Self-Cleaning Flexible Wearable Temperature Sensing Device

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