Functionalization of carbon nanomaterials for advanced polymer nanocomposites: A comparison study between CNT and graphene

Punetha, Vinay Deep; Rana, Sravendra; Yoo, Hye Jin; Chaurasia, Alok; McLeskey, James T.; Ramasamy, Madeshwaran Sekkarapatti; Sahoo, Nanda Gopal; Cho, Jae Whan

doi:10.1016/j.progpolymsci.2016.12.010

Cited by 532 publications

(263 citation statements)

References 444 publications

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“…As shown in Table , 1 wt% CNT resulted in much higher tensile and elongation at break values compared to 1.5 wt% CNT. It is known that the two main factors such as dispersion of carbon nanomaterials and interfacial interaction of nanomaterials and polymer matrix govern the mechanical properties of the nanocomposite . In this study, the vast improvement in mechanical properties of PUs using MWCNTs agreed with the literatures .…”

Section: Resultssupporting

confidence: 85%

High performance aliphatic polyurea films reinforced using nonfunctionalized multiwalled carbon nanotubes

et al. 2019

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Polyurea nanocomposites appear to be a recent advanced elastomer with high robustness. This study shows that without chemical surface functionalization, multiwalled carbon nanotubes (MWCNTs) can significantly increase the tensile strength of aliphatic polyurea nanocomposites which are cured at room temperature. This is achieved via ultrasonic dispersion techniques which prevent agglomeration and the role of MWCNTs as physical crosslink sites, encouraging the formation of hydrogen bonds, thus entangling the polymer chains in the polyurea matrix and restricting chain movement. The incorporation of MWCNT drastically increases the tensile strength of the nanocomposite by 1000%, from 2.16 ± 0.24 MPa to 21.7 ± 4.4 MPa. The thermal and chemical properties of samples are investigated using dynamic mechanical analysis (DMA), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), Fourier‐transform infrared spectroscopy (FTIR), and acetone swelling tests. In this study, we showed that polyurea films reinforced with MWCNTs have high swelling resistance compared to the pure polyurea films. Aliphatic polyurea is also known to have high UV stability. The tensile properties achieved by the nanocomposite in this study are comparable to the aliphatic and aromatic polyurea products in the market and can make these films suitable products for rolling and coating applications.

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Section: Resultssupporting

confidence: 85%

High performance aliphatic polyurea films reinforced using nonfunctionalized multiwalled carbon nanotubes

et al. 2019

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“…Most important of all, CNTs can absorb NIR light and generate a large amount of heat . So CNTs as a kind of functional filler have attracted more and more attention of researchers …”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotubes‐Polyurethane Vitrimer Nanocomposites with the Ability of Surface Welding Controlled by Heat and Near‐Infrared Light

Yan

Zhao

Wang

et al. 2017

Macro Chemistry & Physics

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Welding technology of polymer materials, serving as an exceedingly good tactics to save materials, reduce cost, and reduce material loss, is only extensively applied in thermoplastic materials for the moment. Recently, a new class of polymer, known as vitrimer, has attracted the eye of researchers because it realizes the reprocessing and reshape of thermosets and possesses many excellent functions, such as multishape memory, healing, and surface welding. Among these, the vitrimer makes the surface welding of thermosetting material possible. In this paper, carbon nanotubes‐polyurethane vitrimer nanocomposites with the capability of surface welding controlled by heat and near‐infrared (NIR) light are successfully prepared. Here, the effects of surface welding are characterized by lap shear tests and optical microscope. In addition, from the control experiments, it is found that the shear strength of the light‐welding sample under NIR illumination for 1 min is greater than that of the heat‐welding sample at 110 °C for 10 min. Furthermore, thermosetting polyurethane has been applied in many fields, and it is hoped that the findings, especially near‐infrared welding technology, will make some contributions for welding technology of polymer.

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“…Moreover, the conductivity of PC‐CNT is significantly higher than their corresponding composites with CF and G at the same filler content. One major reason for these differences is the length to diameter aspect ratio of the fillers, which significantly affects the percolation threshold and electrical conductivity ; CNT has the highest aspect ratio of ~100 and CFs is ~10 while G is a two‐dimensional (2D) plate‐like filler (Fig. ).…”

Section: Resultsmentioning

confidence: 99%

Hybrid conductive filler/polycarbonate composites with enhanced electrical and thermal conductivities for bipolar plate applications

et al. 2018

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Conductive polymer composites (CPCs) with high electrical and thermal conductivities are demanded for bipolar plates of fuel cells. In this work, CPCs of polycarbonate (PC) filled with carbon nanotube (CNT), carbon fiber (CF), graphite (G), and their double and triple hybrids were prepared using solution casting method followed by compression molding. The results showed that the electrical percolation thresholds for the PC‐CNT and PC‐CF were ~1 wt% and ~10 wt%, respectively, while no clear threshold was found for PC‐G composites. Addition of 3–5 wt% CNT improved the electrical conductivity of PC‐CF and PC‐G systems up to 6 orders of magnitude and enhanced the thermal conductivity as much as 65%. The results of triple hybrid CPCs (with constant loading of 63 wt%) indicated that the combination of highest electrical and thermal conductivities is achieved when the CF and CNT loadings were near their percolation thresholds. Therefore, a triple filler system of 3 wt% CNT, 10 wt% CF, and 50 wt% G resulted in a composite with the through‐plane and in‐plane electrical conductivity, and thermal conductivity values of 12.8 S/cm, 8.3 S/cm, and 1.7 W/m•K, respectively. The results offer a combination of properties surpassing the existing values and suitable for high‐conductivity applications such as bipolar plates. POLYM. COMPOS., 40:3189–3198, 2019. © 2018 Society of Plastics Engineers

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Functionalization of carbon nanomaterials for advanced polymer nanocomposites: A comparison study between CNT and graphene

Cited by 532 publications

References 444 publications

High performance aliphatic polyurea films reinforced using nonfunctionalized multiwalled carbon nanotubes

High performance aliphatic polyurea films reinforced using nonfunctionalized multiwalled carbon nanotubes

Carbon Nanotubes‐Polyurethane Vitrimer Nanocomposites with the Ability of Surface Welding Controlled by Heat and Near‐Infrared Light

Hybrid conductive filler/polycarbonate composites with enhanced electrical and thermal conductivities for bipolar plate applications

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