Strengthening carbon nanotube fibers with semi-crystallized polyvinyl alcohol and hot-stretching

Liu, Jialin; Gong, Wenbin; Yao, Yagang; Li, Qingwen; Jiang, Jin; Wang, Yong; Zhou, Gengheng; Qu, Shuxuan; Lu, Weibang

doi:10.1016/j.compscitech.2018.06.003

Cited by 32 publications

(21 citation statements)

References 37 publications

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“…Polarized Raman analysis is very interesting in this context since it allows the detection of the presence of MWCNTs and gives information about their orientations [43][44][45][46][47][48][49][50][51][52][53] . Raman spectra of nanocomposites before and after laser treatment.…”

Section: Resultsmentioning

confidence: 99%

Near-Infrared Laser Direct Writing of Conductive Patterns on the Surface of Carbon Nanotube Polymer Nanocomposites

Haber

Noel

Lin

et al. 2021

ACS Appl. Mater. Interfaces

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Near-infrared (NIR) laser annealing is used to write conductive patterns at the surface of Polypropylene/Multi-walled carbon nanotube nanocomposite (PP/MWCNT) plates. Before irradiation, the surface of the nancomposite is not conductive due to the partial alignment of the MWCNT which occurs during injection molding. We observe a significant increase of the surface sheet resistance using NIR laser irradiation, which we explain by a randomization of the orientation of MWCNTs in the PP matrix melt by NIR laser irradiation. After only 5s of irradiation, the sheet resistance of PP/MWCNT, annealed with a laser at a power density of 7 W/cm 2 , decreases by more than 4 decades from ~ 100 MΩ/sq to ~ 1 kΩ/sq. Polarized Raman, TEM, and SEM are used to investigate the changes in the sheet resistance and confirm the physico-chemical processes involved. This allows directwriting of conductive patterns using NIR laser at the surface of nanocomposite polymer substrates, with the advantages of a fast, easy, and low-energy consumption process.

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Section: Resultsmentioning

confidence: 99%

Near-Infrared Laser Direct Writing of Conductive Patterns on the Surface of Carbon Nanotube Polymer Nanocomposites

Haber

Noel

Lin

et al. 2021

ACS Appl. Mater. Interfaces

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“…Interestingly, two recent studies have shown that thermoplastic polymers such as ultrahigh molecular weight polyethylene and polyvinyl alcohol can mobilize and align CNTs upon stretching. 24,25 This is a way to overcome CNT entanglement by providing more stress transfer to the CNTs via the polymers. However, the high aligning of pure CNT assemblies remains more important.…”

Section: Resultsmentioning

confidence: 99%

“…Polymer inltration is another successful strategy because of enhanced adhesion [19][20][21][22] and intertube friction 23 between CNTs. Wang 24 and Liu et al 25 recently, attempted to use polymer molecules to mobilize and align CNTs and to reach a certain straight CNT assembly. Therefore, it is expected that the highly entangled CNT assembly can be converted into a straight structure by improving the stretching efficiency.…”

Section: Introductionmentioning

confidence: 99%

Shampoo assisted aligning of carbon nanotubes toward strong, stiff and conductive fibers

et al. 2020

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“…[ 8 ] However, when CNTs are combined to form a useable wire, these properties drop many order of magnitude. [ 9 ] Over the last decade there has been a great progress in creating CNTs wires using wet spinning (spinning using super‐acids [ 10–13 ] and surfactant‐based coagulation spinning [ 14–31 ] ) and dry spinning (aligned forest‐array spinning [ 32–54 ] and direct spinning of CNTs aerogel [ 40,55–87 ] ). Good quality CNTs wires are now commercially available.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of High Specific Electrical Conductivity and High Ampacity Carbon Nanotube/Copper Composite Wires

Bazbouz

Aziz

Copic

et al. 2021

Adv Elect Materials

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A challenge is to integrate Cu with carbon nanotubes (CNTs) and form a free‐standing composite wire. This is achieved by first making a CNT filament using high concentration (20 g L−1 ) CNT dispersion, an acid‐free wet spinning process and then by replacing the polymer with copper using heat based polymer decomposition and periodic pulse reverse electroplating. It is demonstrated that indeed the specific conductivity and the current‐carrying capability (or ampacity) are increased manifold. The multiwalled CNT (MWCNT)/Cu composite wires developed in this paper have electrical conductivity σ ≈ 5.5 × 10 5 S cm−1. These MWCNT/Cu wires are 2/3rd the weight of bulk Cu wires. Their specific electrical conductivity is σρ ≈ 9.38 ×10 4 S cm2 g−1 which is 45% higher than International Annealed Copper Standard Cu. These composite wires have an ampacity of A ≈ 20 × 105 and 4 × 105 A cm−2 for 1.5 and 17 mm gauge length wires, respectively, which is four to six times higher than pure Cu depending on the wire lengths. MWCNTs volume percentage in the MWCNT/Cu wire is about 40%.

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Strengthening carbon nanotube fibers with semi-crystallized polyvinyl alcohol and hot-stretching

Cited by 32 publications

References 37 publications

Near-Infrared Laser Direct Writing of Conductive Patterns on the Surface of Carbon Nanotube Polymer Nanocomposites

Near-Infrared Laser Direct Writing of Conductive Patterns on the Surface of Carbon Nanotube Polymer Nanocomposites

Shampoo assisted aligning of carbon nanotubes toward strong, stiff and conductive fibers

Fabrication of High Specific Electrical Conductivity and High Ampacity Carbon Nanotube/Copper Composite Wires

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