Welding of 3D-printed carbon nanotube–polymer composites by locally induced microwave heating

Sweeney, Charles B.; Lackey, Blake A.; Pospisil, Martin J.; Achee, Thomas C.; Hicks, Victoria K.; Moran, Aaron G.; Teipel, Blake R.; Saed, Mohammad A.; Green, Micah J.

doi:10.1126/sciadv.1700262

Cited by 238 publications

(148 citation statements)

References 22 publications

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“…It was found that injection molding produces more rigid structures compared to that of 3DP, however, 3DP showed better manufacturing flexibility because of rapid prototyping by producing commercial objects which are possible to test under real operational conditions and by in situ incorporation of carbon fibres. To improve the weak weld zone between successive filament traces in the 3D printed plastic engineering parts, Sweeney et al [79] developed a novel concept for welding 3D printed thermoplastic interfaces. The authors used intense localized heating of carbon nanotubes (CNTs) by microwave irradiation which was introduced as locally induced RF (LIRF) welding method.…”

Section: Processing Of Carbon Cnt/polymer Nanocomposites Using 3dpmentioning

confidence: 99%

“…To improve the weak weld zone between successive filament traces in the 3D printed plastic engineering parts, Sweeney et al [79] developed a novel concept for welding 3D printed thermoplastic interfaces. The authors used intense localized heating of carbon nanotubes (CNTs) by microwave irradiation which was introduced as locally induced RF (LIRF) welding method.…”

Section: Processing Of Carbon Cnt/polymer Nanocomposites Using 3dpmentioning

confidence: 99%

“…(a) 3D-printed parts tend to display weak tensile properties in the y and z directions due to poor interlayer welding. To address this, the authors coated thermoplastic filament with a CNT-rich layer; the resulting 3D-printed part contains RF-sensitive nanofillers localized at the interface; (b) When a microwave field is applied, the interface is locally heated to allow for polymer diffusion and increased fracture strength [79]. Liu et al [80] fabricated arbitrary 3D micro/nanostructures ( Figure 5) from MWNT-thiol-acrylate (MTA) composite resins via TPP technique with ultrahigh spatial resolution.…”

Section: Processing Of Carbon Cnt/polymer Nanocomposites Using 3dpmentioning

confidence: 99%

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Polymer/Carbon Nanotubes (CNT) Nanocomposites Processing Using Additive Manufacturing (Three-Dimensional Printing) Technique: An Overview

Ghoshal

2017

Fibers

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Additive manufacturing (AM)/3D printing (3DP) is a revolutionary technology which has been around for more than two decades, although the potential of this technique was not fully explored until recently. Because of the expansion of this technology in recent years, new materials and additives are being searched for to meet the growing demand. 3DP allows accurate fabrication of complicated models, however, structural anisotropy caused by the 3DP approaches could limit robust application. A possible solution to the inferior properties of the 3DP based materials compared to that of conventionally manufactured counterparts could be the incorporation of nanoparticles, such as carbon nanotubes (CNT) which have demonstrated remarkable mechanical, electrical, and thermal properties. In this article we review some of the research, products, and challenges involved in 3DP technology. The importance of CNT dispersion in the matrix polymer is highlighted and the future outlook for the 3D printed polymer/CNT nanocomposites is presented.

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Section: Processing Of Carbon Cnt/polymer Nanocomposites Using 3dpmentioning

confidence: 99%

Section: Processing Of Carbon Cnt/polymer Nanocomposites Using 3dpmentioning

confidence: 99%

Section: Processing Of Carbon Cnt/polymer Nanocomposites Using 3dpmentioning

confidence: 99%

See 1 more Smart Citation

Polymer/Carbon Nanotubes (CNT) Nanocomposites Processing Using Additive Manufacturing (Three-Dimensional Printing) Technique: An Overview

Ghoshal

2017

Fibers

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“…The temperature on CNT surface can reach up to 2000 °C during microwave radiation . This exceptional characteristic of carbon nanotubes enabled them to be used in the welding of thermoplastics as well as targeting the cancerous tumors in hyperthermia therapy …”

Section: Selected Fast Self‐healing Systems For Mechanical Property Rmentioning

confidence: 99%

Ultra‐Fast Microwave Assisted Self‐Healing of Covalent Adaptive Polyurethane Networks with Carbon Nanotubes

Bonab

Karimkhani

Manas‐Zloczower

2018

Macro Materials & Eng

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Vitrimers are a class of covalent adaptive networks which, unlike other covalent networks, can be thermally reprocessed, recycled, and are self‐healing. In this research, a polyurethane vitrimer network is prepared using 1,4‐phenylene diisocyanate and excess amount of polycaprolactone polyol. The dynamic nature of this network is provided by a dual effect of dynamic transesterification reactions as well as dynamic transcarbamoylation reactions. This vitrimer can be reshaped, be recycled, and heal potential defects at high enough temperatures. A fast healing strategy is developed by the addition of small amounts (0.05 wt%) of carbon nanotubes (CNTs) which enables the use of microwave radiation for an efficient fast healing process. Using this strategy the healing time decreases more than 30 times compared to using a conventional oven. CNTs also enhance the vitrimer mechanical properties and compensate for the mechanical property loss of the dynamic PU network in comparison to the permanent PU network.

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“…Temperature on CNT surface can reach up to 2000 ° C during microwave radiation . This exceptional characteristics of carbon nanotubes enabled them to be used in welding of thermoplastics as well as targeting cancerous tumors in hyperthermia therapy . However, presently there is a need for a cost effective, scalable approach to incorporate CNT‐based materials as susceptor in MW welding.…”

Section: Introductionmentioning

confidence: 99%

Spray‐Assisted Microwave Welding of Thermoplastics Using Carbon Nanostructures with Enabled Health Monitoring

Kravchenko

Bonab

Manas‐Zloczower

2019

Polymer Engineering & Sci

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The present study considers the use of spray‐assisted hybrid microwave welding using suspensions with low concentration of carbon nanostructures (CNS) (0.01 wt%). The proposed method of joining allows to create micron level coverage of the CNS on the thermoplastic substrates using a spray deposition technique. Upon electromagnetic microwave exposure, the CNS coverage provided structural joining of the parts due to dielectric heating. Small clamping force was applied to introduce uniform contact between the welded substrates. The choice of CNS was based on the superior dielectric loss and storage properties when compared to conventional carbon nanotubes. Furthermore, the proposed method of bonding allowed the creation of an electrically conductive percolated network at the welded interface, which was used for structural health monitoring by detecting the changes in the electrical resistance during single lap joint mechanical testing. The proposed method was shown to provide structural levels of welds for thermoplastic with different molecular structure, namely polycarbonate, polyurethane and high‐density polyethylene. POLYM. ENG. SCI., 59:2247–2254, 2019. © 2019 Society of Plastics Engineers

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Welding of 3D-printed carbon nanotube–polymer composites by locally induced microwave heating

Abstract: RF heating of carbon nanotubes enables local welding and increased strength between 3D-printed thermoplastic layers.

Cited by 238 publications

References 22 publications

Polymer/Carbon Nanotubes (CNT) Nanocomposites Processing Using Additive Manufacturing (Three-Dimensional Printing) Technique: An Overview

Polymer/Carbon Nanotubes (CNT) Nanocomposites Processing Using Additive Manufacturing (Three-Dimensional Printing) Technique: An Overview

Ultra‐Fast Microwave Assisted Self‐Healing of Covalent Adaptive Polyurethane Networks with Carbon Nanotubes

Spray‐Assisted Microwave Welding of Thermoplastics Using Carbon Nanostructures with Enabled Health Monitoring

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