Sonication-driven dispersion of multiwalled carbon nanotubes in water with the aid of Na<sup>+</sup>-montmorillonite

Liú, Dan; Huang, Quanfeng; Mao, Yiqin

doi:10.1080/01932691.2020.1844019

Cited by 1 publication

(1 citation statement)

References 25 publications

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“…[12] It has been reported that the sonication-driven dispersion of CNTs in completely exfoliated MMT solution leads them to debundle and mitigates their tendency to reaggregation. [33][34][35] High local shears caused by the ultrasonic oscillation induce MMT sheets to be adsorbed on CNTs. A space barrier exerted from clay platelets increases the distance between nanotubes and prevents CNT entanglement force to the extent that stable clay-CNT suspensions in an aqueous medium are achieved.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Flame Retardant Effects of Carbon Nanotube‐Based Multilayer Nanocoatings

Kim

Jang

Yun

et al. 2021

Macro Materials & Eng

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In an effort to develop highly functionalized flame retardant materials, hybrid nanocoatings are prepared by alternately depositing a positively charged polyaniline (PANi) and negatively charged montmorillonite (MMT) using the layer-by-layer (LbL) assembly technique. Carbon nanotubes (CNTs) are employed in polymer nanocomposites as effective reinforcement, where nanotubes are stabilized in MMT aqueous solution. The 3D structure and high density of CNTs deposited in the PANi/CNTs-MMT multilayers produce thicker and heavier coatings in comparison to the LbL assemblies without CNTs. Vertical and horizontal flame testing show that the incorporation of CNTs improves fire resistance. Additionally, cone calorimetry reveals that stacking two nanomaterials (MMT and CNTs) in a single coating shows a significant reduction in peak heat release rate (up to 51%), total smoke release (up to 47%), and total heat release (up to 37%) for the polyurethane foam. The enhancement of flame retardancy is attributed to a synergistic effect; MMT serves as a physical barrier that retards the diffusion of heat and gas. The addition of CNTs strengthens the thermal stability and high char yield. These results, coupled with the simplicity with which the LbL deposition is applied, present a viable alternative to halogen-free flame retardant nanocoatings to natural and synthetic fibers.

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Section: Introductionmentioning

confidence: 99%

Synergistic Flame Retardant Effects of Carbon Nanotube‐Based Multilayer Nanocoatings

Kim

Jang

Yun

et al. 2021

Macro Materials & Eng

View full text Add to dashboard Cite

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Sonication-driven dispersion of multiwalled carbon nanotubes in water with the aid of Na⁺-montmorillonite

Cited by 1 publication

References 25 publications

Synergistic Flame Retardant Effects of Carbon Nanotube‐Based Multilayer Nanocoatings

Synergistic Flame Retardant Effects of Carbon Nanotube‐Based Multilayer Nanocoatings

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Sonication-driven dispersion of multiwalled carbon nanotubes in water with the aid of Na+-montmorillonite

Cited by 1 publication

References 25 publications

Synergistic Flame Retardant Effects of Carbon Nanotube‐Based Multilayer Nanocoatings

Synergistic Flame Retardant Effects of Carbon Nanotube‐Based Multilayer Nanocoatings

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Sonication-driven dispersion of multiwalled carbon nanotubes in water with the aid of Na⁺-montmorillonite