Thermal diffusivity, thermal conductivity, and specific heat of flax fiber–HDPE biocomposites at processing temperatures

Li, Xue; Tabil, Lope G.; Oguocha, I. N. A.; Panigrahi, Satyanarayan

doi:10.1016/j.compscitech.2008.02.016

Cited by 133 publications

(66 citation statements)

References 21 publications

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“…Differences in the densities between composites are related to the applied fillers and porosity of studied biocomposites. The ascending trend in the density of green composites prepared in this work upon filler content is in good agreement with previous studies (Datta and Głowińska 2011;Li et al 2008 (Selmin et al 2015;Stein and Greene 1997;Stein et al 1999). Furthermore, amorphous structure of cellulose present in WB could enhance matrix-filler interactions (Avolio et al 2015;Tsuboi et al 2012).…”

Section: Physico-mechanical Propertiessupporting

confidence: 80%

Processing and structure–property relationships of natural rubber/wheat bran biocomposites

et al. 2016

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In this work, wheat bran was used as cellulosic filler in biocomposites based on natural rubber. The impact of wheat bran content [ranging from 10 to 50 parts per hundred rubber (phr)] on processing, structure, dynamic mechanical properties, thermal properties, physico-mechanical properties and morphology of resulting biocomposites was investigated. For better characterization of interfacial interactions between natural rubber and wheat bran, achieved results were compared with properties of biocomposites filled with commercially available cellulosic fillers-wood flour and microcellulose. It was observed that wheat bran, unlike commercial cellulosic fillers, contains high amount of proteins, which act like plasticizers having profitable impact on processing, physical, thermo-mechanical and morphological properties of biocomposites. This is due to better dispersion and distribution of wheat bran particles in natural rubber, which results in reduction of stiffness and porosity of the biocomposites. Regardless of cellulosic filler type, Wolff activity coefficient was positive for all studied biocomposites implying reinforcing effect of the applied fillers, while tensile strength and elongation at break decreased with increasing filler content. This phenomenon is related to restricted strain-induced crystallization of NR matrix due to limited mobility of polymer chains in the biocomposites. Furthermore, this explains negligible impact of particle size distribution, chemical composition and crystallinity degree of applied cellulosic filler on static mechanical properties of highlyfilled NR biocomposites. The conducted investigations show that wheat bran presents interesting alternative for commercially available cellulosic fillers and could be successfully applied as a low-cost filler in polymer composites.

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Section: Physico-mechanical Propertiessupporting

confidence: 80%

Processing and structure–property relationships of natural rubber/wheat bran biocomposites

et al. 2016

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“…Besides the Russell model, Eq. (5) assumes that the reinforcement fibers have a cubic form, all being the same size and very well dispersed on the matrix (Li et al 2008). …”

Section: Halpin-tsai Modelmentioning

confidence: 99%

Polymeric biocomposites of poly (butylene adipate-co-terephthalate) reinforced with natural Munguba fibers

2014

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In this work, polymeric biocomposites of poly (butylene adipate-co-terephthalate), PBAT, were reinforced with Munguba fibers (Pseudobombax munguba). This tree is found in great abundance in the marshy areas of the Amazon forest. The motivation for using this fiber in polymer composites comes from the fact that although research for this fiber has not been reported in the scientific literature, it is commonly used by the local population because its bark is strong and flexible. Most important is that the extraction of Munguba fibers does not damage the supplier tree because as it is extracted from the bark, its regeneration starts as it is removed. The fibers were chemically treated by mercerization/acetylation and evaluated by Fourier transform infrared spectroscopy, thermogravimetric analysis and tensile tests. The Munguba fiber presented mechanical properties similar to those of other natural fibers traditionally used in composites, and the chemical treatment provided improvements of its thermal stability and stiffness. The biocomposites showed a better elastic modulus in relation to the pure PBAT. The addition of fibers caused changes in the T g , T m and T c of PBAT as observed by differential scanning calorimetry analysis. The Russel, Halpin-Tsai and Maxwell models were employed to provide the theoretical elastic modulus of the biocomposites.

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“…4b, the thermal diffusivity of our aerogels is below 4.54 mm 2 /s, with the minimum of 2.09 mm 2 /s for CA-0.5M. In theory, the thermal diffusivity is proportional to the thermal conductivity, while inversely proportional to the aerogel density [43]. Meanwhile, a higher CNT volume density and lower porosity always lead to a larger thermal conductivity [42,44].…”

Section: Thermal Diffusivitymentioning

confidence: 93%

Facile preparation of carbon nanotube aerogels with controlled hierarchical microstructures and versatile performance

Dong

Yang

et al. 2015

Carbon

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Thermal diffusivity, thermal conductivity, and specific heat of flax fiber–HDPE biocomposites at processing temperatures

Cited by 133 publications

References 21 publications

Processing and structure–property relationships of natural rubber/wheat bran biocomposites

Processing and structure–property relationships of natural rubber/wheat bran biocomposites

Polymeric biocomposites of poly (butylene adipate-co-terephthalate) reinforced with natural Munguba fibers

Facile preparation of carbon nanotube aerogels with controlled hierarchical microstructures and versatile performance

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