Thermal Conductivity Enhancement Derived from Poly(Methyl Methacrylate)-Grafted Carbon Nanotubes in Poly(Methyl Methacrylate)/Polystyrene Blends

Wie, Jaehyun; Kim, Jooheon

doi:10.3390/polym11081347

Cited by 25 publications

(11 citation statements)

References 23 publications

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“…Aminated MWCNTs have also been grafted onto poly(methylmethacrylate) (PMMA) via a similar reaction path. The diameters of PMMA-g-MWCNT were on average 50 nm, about 2-3 times larger than those of pristine MWCNTs, as was clearly observed in the SEM images (Figure 3 [45]). PMMA molecules usually have somewhat different molecular weights, which make the surface uneven; hence, the surface roughness of the MWCNTs increased upon PMMA grafting.…”

Section: Amide or Ester Linkagesupporting

confidence: 54%

Chemical Functionalization of Carbon Nanotubes with Polymers: A Brief Overview

Díez‐Pascual

2021

Macromol

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Carbon nanotubes (CNTs), the one-dimensional allotropes of carbon, have attracted noteworthy research interest since their discovery in 1991 owing to their large aspect ratio, low mass density, and unique chemical, physical, and electronic properties that provide exciting possibilities for nanoscale applications. Nonetheless, two major issues should be considered when working with this sort of nanomaterial: their strong agglomerating tendency, since they are typically present as bundles or ropes of nanotubes, and the metallic impurities and carbonaceous fragments that go along with the CNTs. The successful utilization of CNTs in a wide variety of applications—in particular, in the field of polymer composites—depends on their uniform dispersion and the development of a strong chemical interaction with the polymeric matrix. To achieve these aims, chemical functionalization of their sidewalls and tips is required. In this article, a brief overview of the different approaches for CNT modification using polymers is provided, focusing on the covalent functionalization via “grafting to” or “grafting from” strategies. The characteristics and advantages of each approach are thoroughly discussed, including a few typical and recent examples. Moreover, applications of polymer-grafted CNTs as biosensors, membranes, energy storage substances, and EMI shielding are briefly described. Finally, future viewpoints in this vibrant research area are proposed.

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Section: Amide or Ester Linkagesupporting

confidence: 54%

Chemical Functionalization of Carbon Nanotubes with Polymers: A Brief Overview

Díez‐Pascual

2021

Macromol

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“…The presence of peaks between 1450–1490 cm −1 , in both HDPE and nanocomposites, originate due to CH 2 bending [ 43 , 44 ]. For raw CNTs, the peaks between 500–1000 and 1650 cm −1 are due to alkenyl C=C stretching [ 45 , 46 ], as presented in Figure 5 . The bands between 2850 and 2922 cm −1 are associated with the symmetrical and asymmetrical stretching of CH 2 groups [ 47 ].…”

Section: Resultsmentioning

confidence: 99%

Carbon Nanotube Reinforced High Density Polyethylene Materials for Offshore Sheathing Applications

et al. 2020

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Multiwall carbon nanotube (CNT)-filled high density polyethylene (HDPE) nanocomposites were prepared by extrusion and considered for their suitability in the offshore sheathing applications. Transmission electron microscopy was conducted to analyse dispersion after bulk extrusion. Monolithic and nanocomposite samples were subjected to accelerated weathering and photodegradation (carbonyl and vinyl indices) characterisations, which consisted of heat, moisture (seawater) and UV light, intended to imitate the offshore conditions. The effects of accelerated weathering on mechanical properties (tensile strength and elastic modulus) of the nanocomposites were analysed. CNT addition in HDPE produced environmentally resilient nanocomposites with improved mechanical properties. The energy utilised to extrude nanocomposites was also less than the energy used to extrude monolithic HDPE samples. The results support the mass substitution of CNT-filled HDPE nanocomposites in high-end offshore applications.

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“…In order to prepare PMMA photonic crystals with both high structural stability and high color saturation, the curing temperature was controlled at 90 1C. The curing temperature must be below 100 1C because the glass transition temperature of PMMA nanospheres was approximately 100-105 1C so as to ensure their chain stability 34 (Fig. S3, ESI †).…”

Section: Stabilization Of Structurally Colored Fabrics With Pmma Phot...mentioning

confidence: 99%