Morphology and mechanical and electrical properties of oriented PVA–VGCF and PVA–MWNT composites

Bin, Yuezhen; Mine, Mariko; Koganemaru, Ai; Jiang, Xiaowen; Matsuo, Masaru

doi:10.1016/j.polymer.2005.12.032

Cited by 139 publications

(83 citation statements)

References 22 publications

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“…Both the decrease of T m and the broadening of the melting peak can be attributed to the reduced crystallinity due to the incorporated SiO 2 nanoparticles. Bin et al reported this kind of behavior for PVA-VGCF and PVA-MWNT composites [46].…”

Section: Thermal Analysismentioning

confidence: 80%

Comparative study of PVA/SiO2 and PVA/SiO2/glutaraldehyde (GA) nanocomposite membranes prepared by single-step solution casting method

et al. 2015

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We prepared poly(vinyl alcohol) (PVA)/SiO 2 and PVA/SiO 2 /glutaraldehyde (GA) nanocomposite membranes in a single step using the solution casting method. The structure, morphology, and properties of these nanocomposite membranes were characterized by Raman spectroscopy, atomic force microscopy, small-and wideangle X-ray scattering, thermogravimetric analysis, differential scanning calorimetry, and dynamic mechanical analysis (DMA). The influence of silica and GA loading on the meso-scale characteristics of the composite membranes was investigated. The results showed that silica deposited in the form of small nanoparticles (*1 nm) in the PVA/ SiO 2 membranes, while bigger submicron particles ([25 nm) were formed in the PVA/SiO 2 /GA membranes. The water uptake of the PVA/SiO 2 membranes increased with temperature, but the PVA/SiO 2 /GA membranes were completely dissolved above 50°C. We can therefore conclude that the addition of GA deteriorated the properties of PVA/SiO 2 membranes. The thermal stability of the PVA/ SiO 2 membranes increased with the increasing silica loading with a maximum char yield of 46 % for PVA/SiO 2 / 4T. Even DMA profiles indicated a promising increase in E R (rubbery modulus) from 6 MPa (PVA membrane) to 1015 MPa (PVA/SiO 2 /4T) at 250°C, showing high mechanical strength of these membranes.

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Section: Thermal Analysismentioning

confidence: 80%

Comparative study of PVA/SiO2 and PVA/SiO2/glutaraldehyde (GA) nanocomposite membranes prepared by single-step solution casting method

et al. 2015

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“…This process allows control over a wide of tube diameters, layer numbers, and tube lengths. The vapor grown carbon fibers (VGCFs) by the CCVD method are characterized as with highly preferred orientation of their graphitic basal plane parallel to the fiber axis and with annular ring texture in the cross section [5].…”

Section: Introductionmentioning

confidence: 99%

Temperature dependence of electrical resistivity in carbon nanofiber/unsaturated polyester nanocomposites

Natsuki¹,

Ni²,

Wu³

2008

Polymer Engineering & Sci

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This paper described the temperature dependence of electrical resistivity for carbon nanofiber (CNF)/unsaturated polyester resin (UPR) nanocomposites prepared by a solvent evaporation method. It was found that the CNF/UPR nanocomposites had quite low electrical percolation threshold due to CNFs having a large aspect ratio and being well dispersed into the UPR matrix. A Sharp decrease in the electrical resistivity was observed at about 1 wt% CNF content. The influence of CNF content on the electrical resistivity was investigated as a function of temperature in detail. The nanocomposites showed a positive temperature coefficient (PTC) effect for the resistivity, and had a strong temperature dependence near the percolation threshold. When the number of thermal cycles was increased, the electrical resistivity decreased and had a weak temperature dependence, especially in the case of melting temperature. Moreover, the size influences of CNFs on the electrical properties of nanocomposites were analyzed and discussed.

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“…In particular, the conductivity of PVA nanotube composites loaded up to 5wt% with carbon nanotubes and carbon nanofilaments has been investigated as a function of temperature (10). The authors reported a nearly constant conductivity in the temperature range from 20 to 220°C.…”

mentioning

confidence: 99%

Influence of surface functionalization on the thermal and electrical properties of nanotube–PVA composites

Bartholome¹,

Miaudet²,

Derré³

et al. 2008

Composites Science and Technology

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Morphology and mechanical and electrical properties of oriented PVA–VGCF and PVA–MWNT composites

Cited by 139 publications

References 22 publications

Comparative study of PVA/SiO2 and PVA/SiO2/glutaraldehyde (GA) nanocomposite membranes prepared by single-step solution casting method

Comparative study of PVA/SiO2 and PVA/SiO2/glutaraldehyde (GA) nanocomposite membranes prepared by single-step solution casting method

Temperature dependence of electrical resistivity in carbon nanofiber/unsaturated polyester nanocomposites

Influence of surface functionalization on the thermal and electrical properties of nanotube–PVA composites

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