Thermal Conductivity of Poplar Wood Veneer Impregnated with Graphene/Polyvinyl Alcohol

Intending to achieve more green and economical graphene impregnated modified fast-growing poplar wood veneer for heat conduction, this study proposes and investigates the feasibility of modified veneer with graphene/Polyvinyl alcohol (Gr/PVA) impregnation mixture to improve its thermal conductivity. The absorbance and viscosity of the Gr/PVA impregnation mixtures are observed to expound the Gr/PVA ratio effects on the mixtures. Simultaneously, the weight percent gain, chromatic aberration, and thermal conductivity of the modified veneers are measured to determine the impregnation effect and the optimal impregnation formula. Further, the chemical structure, crystallinity, and thermal stability of the optimal sample impregnated with Gr/PVA are tested. The results show that the thermal properties of the Gr/PVA impregnated modified veneer have not all been improved. Still, both the dispersibility of the impregnation mixtures and the impregnation effect is affected by the Gr/PVA ratio. The data shows that the optimal thermal conductivity of modified veneer, which is up to 0.22 W·m−1·K−1 and 2.4 times the untreated one, is dipped by the mixture of 10 wt.% PVA concentration and 2 wt.% MGEIN addition. According to the characterization tests, the crystallinity of the modified veneer reduces, but the thermal stability improves.

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Dynamic mechanical properties and thermal stability of furfuryl alcohol and nano-SiO2 treated poplar wood

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/87/1/012027 ◽

2015 ◽

Vol 87 ◽

pp. 012027 ◽

Cited By ~ 1

Author(s):

Youming Dong ◽

Xiaoyan Shen ◽

Shifeng Zhang ◽

Jianzhang Li

Keyword(s):

Mechanical Properties ◽

Thermal Stability ◽

Furfuryl Alcohol ◽

Dynamic Mechanical Properties ◽

Poplar Wood ◽

Dynamic Mechanical ◽

Nano Sio2 ◽

Thermal Stability Of

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High partial thermal conductivity of luminescence sites: a crucial factor for reducing the heat-induced lowering of the luminescence efficiency

Journal of Materials Chemistry C ◽

10.1039/d1tc02287c ◽

2021 ◽

Author(s):

Ni Luo ◽

Jing Xu ◽

Xiyue Cheng ◽

ZhenHua Li ◽

Yidong Huang ◽

...

Keyword(s):

Thermal Conductivity ◽

Thermal Stability ◽

Practical Applications ◽

Good Thermal Stability ◽

The Past ◽

Luminescence Efficiency ◽

Thermal Stability Of

The good thermal stability of a phosphor is crucial for its practical applications. Unfortunately, in the past decades, only Gurney-Mott equation was available to describe the relation between the luminescence...

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Synthesis and investigation of thermal properties of PMMA-maleimide-functionalized reduced graphene oxide nanocomposites

Journal of Thermoplastic Composite Materials ◽

10.1177/0892705718804595 ◽

2018 ◽

Vol 33 (1) ◽

pp. 85-96

Author(s):

Thangamani Rajkumar ◽

Nagamuthu Muthupandiyan ◽

Chinnaswamy Thangavel Vijayakumar

Keyword(s):

Thermal Stability ◽

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Chemical Interaction ◽

Weight Percent ◽

Bulk Polymerization ◽

Pmma Matrix ◽

Uniform Dispersion ◽

Reduced Graphene ◽

Thermal Stability Of

Reduced graphene oxide (RGEO) and N-[4-(chlorocarbonyl)phenyl]maleimide-functionalized reduced graphene oxide (MFRGEO) were used as nanofillers for polymethyl methacrylate (PMMA) matrix nanocomposites to enhance thermal stability. Methyl methacrylate containing nanofiller of four different weight percent (0.2, 0.4, 0.6, and 0.8) was polymerized using ultrasonic radiation-assisted bulk polymerization. The Fourier-transform infrared spectra showed the absence of chemical interaction between the filler and the matrix phase. Morphology of nanocomposites studied using scanning electron microscope confirmed the assistance aided by ultrasonication in the uniform dispersion of nanofiller in the PMMA matrix. Thermogravimetric (TG) study revealed the presence of MFRGEO enhanced the thermal stability of PMMA by shifting the entire degradation to higher temperature. The thermal stability of PMMA nanocomposite was improved by as much as 40°C at just 0.8 wt% loading of MFRGEO. Differential TG study also supported the role of maleimide functionalization on RGEO in the enhancement of thermal stability of PMMA by means of retarding the degradation rate of unsaturated chain ends in the PMMA matrix. Unlike MFRGEO, RGEO failed to enhance the thermal stability of PMMA.

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Surface Modification of Bacterial Cellulose Sheets With Various Fire Retardants

Journal of Thermal Science and Engineering Applications ◽

10.1115/1.4047278 ◽

2020 ◽

Vol 13 (2) ◽

Author(s):

Eser Sözen ◽

Gökhan Gündüz ◽

Deniz Aydemir ◽

Ahmet Can

Keyword(s):

Thermal Stability ◽

Fourier Transform ◽

Infrared Spectroscopy ◽

Thermogravimetric Analysis ◽

Phosphoric Acid ◽

Bacterial Cellulose ◽

Weight Percent Gain ◽

Weight Percent ◽

Fire Retardants ◽

Freeze Dried

Abstract This study investigated the effects of various fire retardants including Firetex®, phosphoric acid, and nanoboron nitride on the thermal and morphological properties of bacterial cellulose (BC) sheets. Hestrin and Schramm medium was inoculated with Gluconacetobacter hansenii and the medium with the bacteria was incubated for 14 days. The obtained BC sheets were freeze-dried and then the dried sheets were immersed with Firetex®, phosohoric acid, and nanoboron nitride for a day. The sheets were once again freeze-dried and weight percent gain (WPG) of the sheets was calculated by using wet and dried weights. The morphological characterization, thermal properties, and structural changes of the obtained sheets were also investigated with scanning electron microscopy (SEM), thermogravimetric analysis, and Fourier-transform infrared spectroscopy, respectively. The weight percent gain was found to increase 31% for the samples with boron nitride and 1040% for the samples with phosphoric acid after the impregnation. The thermogravimetric analysis showed that the impregnation improved the thermal stability of the BC films. The sheets with nanoboron nitride exhibited the best thermal stability, whereas the sheets with Firetex were determined to have the worst thermal stability. The Fourier-transform infrared spectroscopy showed some changes in the structural properties of the all BC sheets with fire retardants. As a result, it can be said that nanoboron nitride at low temperatures (25–250 °C) and Firetex and phosphoric acid at higher temperatures (600–900 °C) showed better thermal stability.

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Thermoelectric properties and thermal stability of layered chalcogenides, TlScQ2, Q = Se, Te

Dalton Transactions ◽

10.1039/c7dt03446f ◽

2017 ◽

Vol 46 (48) ◽

pp. 17053-17060 ◽

Cited By ~ 5

Author(s):

Vijayakumar Sajitha Aswathy ◽

Cheriyedath Raj Sankar ◽

Manoj Raama Varma ◽

Abdeljalil Assoud ◽

Mario Bieringer ◽

...

Keyword(s):

Thermal Conductivity ◽

Thermal Stability ◽

Band Structure ◽

Thermoelectric Properties ◽

Layered Chalcogenides ◽

Low Thermal Conductivity ◽

Structure Characteristics ◽

Thermal Stability Of

The layered chalcogenides, TlScQ2 (Q = Se, Te), possess intriguing band structure characteristics and very low thermal conductivity.

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Thermal stability of polyvinyl alcohol/nanocrystalline cellulose composites

Carbohydrate Polymers ◽

10.1016/j.carbpol.2015.05.032 ◽

2015 ◽

Vol 130 ◽

pp. 440-447 ◽

Cited By ~ 75

Author(s):

Marina I. Voronova ◽

Oleg V. Surov ◽

Sabir S. Guseinov ◽

Vladimir P. Barannikov ◽

Anatoly G. Zakharov

Keyword(s):

Thermal Stability ◽

Polyvinyl Alcohol ◽

Nanocrystalline Cellulose ◽

Cellulose Composites ◽

Thermal Stability Of

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Tensile properties, thermal conductivity, and thermal stability of short carbon fiber reinforced polypropylene composites

Polymer Composites ◽

10.1002/pc.24093 ◽

2016 ◽

Vol 39 (S2) ◽

pp. E664-E670 ◽

Cited By ~ 17

Author(s):

Djamila Kada ◽

Ahmed Koubaa ◽

Ghezalla Tabak ◽

Sebastien Migneault ◽

Bertrand Garnier ◽

...

Keyword(s):

Thermal Conductivity ◽

Thermal Stability ◽

Carbon Fiber ◽

Tensile Properties ◽

Fiber Reinforced ◽

Short Carbon Fiber ◽

Polypropylene Composites ◽

Carbon Fiber Reinforced ◽

Short Carbon ◽

Thermal Stability Of

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Thermal stabilities of slabs and hollow spheres with internal heat generation and variable thermal conductivity—I. thermal stability of Landau slabs with linearly varying thermal conductivity

Journal of the Franklin Institute ◽

10.1016/0016-0032(87)90038-x ◽

1987 ◽

Vol 323 (1) ◽

pp. 33-42 ◽

Cited By ~ 3

Author(s):

C.K. Liu

Keyword(s):

Thermal Conductivity ◽

Thermal Stability ◽

Heat Generation ◽

Hollow Spheres ◽

Internal Heat ◽

Variable Thermal Conductivity ◽

Internal Heat Generation ◽

Thermal Stabilities ◽

Thermal Stability Of

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Study on Glass Fiber Reinforced EP/PSF Insulating and Thermally Conductive Composite Filled with BN Particles

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.341-342.153 ◽

2013 ◽

Vol 341-342 ◽

pp. 153-156

Author(s):

Fan Xie ◽

Shu Hua Qi ◽

Jun Peng Li

Keyword(s):

Thermal Conductivity ◽

Thermal Stability ◽

Composite Materials ◽

Glass Fiber ◽

Glass Fiber Reinforced ◽

The Matrix ◽

Thermally Conductive ◽

Modified Epoxy ◽

Thermal Stability Of ◽

Press Molding

Polysulfone modified epoxy resin was chosen as the matrix of composite materials. The epoxy/glass fiber/boron nitride composite materials were prepared by heat press molding. The effect of different size and content of BN on the thermal, mechanical, electrical properties and thermal stability of the composite was investigated. The results showed that thermal conductivity and thermal stability of the composite increased with the content of the BN particles, the thermal conductivity of the composite reached 0.672W/m·K when filled with 1μm BN at 20 wt.%. Impact strength and flexure strength of the composite increased initially and then decreased with the increasing content of BN. The electrical insulating property of the composite remained with the content of 20 wt.% BN.

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