Fabrication and Characterization of Solid Composite Yarns from Carbon Nanotubes and Poly(dicyclopentadiene)

Xin, Wenbo; Severino, Joseph; Venkert, A.; Yu, Hang; Knorr, Daniel B.; Yang, Jenn‐Ming; Carlson, Larry; Hicks, Robert F.; Rosa, Igor M. De

doi:10.3390/nano10040717

Cited by 8 publications

(3 citation statements)

References 44 publications

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“…The first stage of mass loss occurred between 150°C and 250°C, which is primarily due to the decomposition of the urea formaldehyde shell material of the microcapsules in all samples except neat epoxy. During the second stage of mass loss between 300°C and 580°C, all the samples underwent a rapid mass loss down to 16 wt.%, which is apparently the thermal decomposition of the base epoxy resin [28,29]. The decomposition temperatures of sample Ep+Mc and neat epoxy for a 10 wt.% residual mass were found to be 682°C and 658°C (ΔT≈24°C), respectively.…”

Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 93%

Investigation of microcapsules based self-healing composites embedded with carbon nanotubes for improved healing efficiency

Kumar,

et al. 2024

Preprint

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Self-healing composites are smart materials that can self-detect and prevent micro crack propagation and any catastrophic failure in the composite structure. In this study, dicyclopentadiene (DCPD) monomer was encapsulated with urea formaldehyde (UF) by in situ polymerization. These microcapsules were mixed with epoxy, chopped carbon fiber (CF), and multi-walled carbon nanotubes (CNT) to make self-healing composite. Both microcapsules and the composite specimens were extensively tested for their physical, thermal, and mechanical properties. The average diameter and shell thickness of the microcapsules were 268 µm and 805 nm, respectively. DMA analysis suggested that the microcapsules have a glass transition temperature (Tg) of 85°C. FTIR analysis confirmed the presence of CF, multi-walled carbon nanotubes (MWCNT), and other constituents in the composite. The tensile strength of the self-healing composites was tested as per ASTM standards. The incorporation of MWCNT in the composites has significantly improved the tensile strength of the composite without compromising on the self-healing efficiency (90%) compared the unmodified samples (72%). The encouraging results of higher glass transition temperature (85°C) combined with an improved healing efficiency (90%), can be considered as the novelties of this work. As the test results of microcapsules and composite specimens were encouraging, they can find applications in making composite structures for aerospace, windmills, and marine applications. The experimental observations and test results are discussed in detail.

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Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 93%

Investigation of microcapsules based self-healing composites embedded with carbon nanotubes for improved healing efficiency

Kumar,

et al. 2024

Preprint

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“…[15][16][17][18][19][20][21][22] Several methods can be used to facilitate the distributing of soybean flour in the DCPD polymer network, such as mechanical mixing, magnetic stirring and sonication. [23][24][25][26][27][28] Among them, sonication has been demonstrated as a high-efficiency approach. Jeong and Kessler prepared nanocomposites using norbornene-functionalized multiwalled carbon nanotube as filler in DCPD resin with ultrasonic-assisted method, [29] Sanada et al have fabricated carbon nanofiber/DCPD composites by ultrasonic technique, they both conclude that the ultrasonication time has a significant effect on the tensile strength and the strain at the maximum stress of carbon nanofiber/poly-DCPD composite, this was mainly due to ultrasonic methods was effective for dispersing carbon nanofibers into poly-DCPD.…”

Section: Introductionmentioning

confidence: 99%

Dispersion of soybean flour in dicyclopentadiene resin for thermoset composite using the ultrasonic‐assisted method

Zhang

Thakur

et al. 2022

Polymer Composites

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Thermosetting composites based on dicyclopentadiene (DCPD) in the presence of Grubbs' catalyst and soybean flour were prepared by ring‐opening metathesis polymerization. Soybean flour/DCPD suspensions were sonicated to enhance the dispersion degree before adding catalyst. The curing extent, thermal‐mechanical properties, morphology and thermal stability of the cured soybean flour/DCPD composites were systematically investigated using Soxhlet extraction, DSC, DMA, TMA, tensile test, SEM, and TGA. The results showed that the tensile strength of the soybean flour/DCPD composites increased from 60.7 MPa to 75.8 MPa with the increase of soybean flour loading from 0% to 25%, and the Tg obtained from DMA also showed an increasing trend from 129.4°C to 155.1°C. Overall, the introduction of soybean flour into DCPD resin improved the thermal‐mechanical properties of the composite and offered decreased cost and enhanced bio‐based content.

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“…The twisting enhances the interaction between CNT bundles, leading to a higher degree of packing and inter bundle friction enhancing the capability of the material to withstand tensile stresses [ 7 , 16 , 18 , 19 ]. Typical solvents, such as acetone, ethanol, methanol, and dichloroethane, condense the CNTYs [ 20 , 21 ]. Typical post-treatment consists of acid treatment, which is useful in enhancing the electrical conductivity of CNT bundles [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Electrical Properties Enhancement of Carbon Nanotube Yarns by Cyclic Loading

et al. 2020

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Carbon nanotube yarns (CNTYs) possess low density, high conductivity, high strength, and moderate flexibility. These intrinsic properties allow them to be a preferred choice for use as conductive elements in high-performance composites. To fully exploit their potential as conductive reinforcing elements, further improvement in their electrical conductivity is needed. This study demonstrates that tensile cyclic loading under ambient conditions improves the electrical conductivity of two types of CNTYs. The results showed that the electrical resistance of untreated CNTYs was reduced by 80% using cyclic loading, reaching the resistance value of the drawn acid-treated CNTYs. Scanning electron microscopy showed that cyclic loading caused orientation and compaction of the CNT bundles that make up the CNTYs, resulting in significantly improved electrical conductivity of the CNTYs. Furthermore, the elastic modulus was increased by 20% while preserving the tensile strength. This approach has the potential to replace the environmentally unfriendly acid treatment currently used to enhance the conductivity of CNTYs.

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Fabrication and Characterization of Solid Composite Yarns from Carbon Nanotubes and Poly(dicyclopentadiene)

Cited by 8 publications

References 44 publications

Investigation of microcapsules based self-healing composites embedded with carbon nanotubes for improved healing efficiency

Investigation of microcapsules based self-healing composites embedded with carbon nanotubes for improved healing efficiency

Dispersion of soybean flour in dicyclopentadiene resin for thermoset composite using the ultrasonic‐assisted method

Electrical Properties Enhancement of Carbon Nanotube Yarns by Cyclic Loading

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