Thermal decomposition of wood: Influence of wood components and cellulose crystallite size

Poletto, Matheus; Zattera, Ademir J.; Forte, Maria M.C.; Santana, Ruth Marlene Campomanes

doi:10.1016/j.biortech.2011.11.122

Cited by 483 publications

(264 citation statements)

References 35 publications

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“…With such specific method to produce NanoCrystalline Cellulose (NCC) from cellulose, it imposed a setback to the practicality of NCC on industry that required high processing temperature, which is caused by reduced thermal stability, or thermal degradation prior to acid hydrolysis. Poletto et al [7] reported that lesser the percentage of crystalline extracted from wood with association with smaller crystalline size could lead to accelerated thermal degradation. This finding is essential to justify the necessity of searching an alternative method to extract NCC with lower particle size.…”

Section: Introductionmentioning

confidence: 99%

Isolation of Nanocrystalline Cellulose from oil palm empty fruit bunch – A response surface methodology study

Song

Chew

Choong

et al. 2016

MATEC Web of Conferences

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Abstract. The research work studied the extraction of NanoCrystalline Cellulose (NCC) from oil palm empty fruit bunch (EFB), with aid of Response Surface Methodology (RSM). Particle size analysis using Malvern Zetasizer had confirmed the extracted NCC fall within the desired nano scaled range. The impact of three input parameters, namely concentration of NaOH solution during alkaline treatment, concentration of H2SO4 solution during acid hydrolysis, and duration for acid hydrolysis on NCC particle were investigated. From ANOVA study, it had suggested that the current RSM model is significant to interpret the interaction among the all three input parameters.

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Section: Introductionmentioning

confidence: 99%

Isolation of Nanocrystalline Cellulose from oil palm empty fruit bunch – A response surface methodology study

Song

Chew

Choong

et al. 2016

MATEC Web of Conferences

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“…The presence of elevated levels of extractable matter (low molecular weight components) can promote biomass ignition at lower temperatures due to their higher volatility and thereby accelerate the thermal degradation process (Grønli, Varhegyi Di;Blasi, 2002;Shebani, Van Poletto et al, 2012). Similar to the combustion test, the maize cob panels revealed a decrease in the peak temperatures due to the increase in percentage of maize cob.…”

Section: Thermogravimetric Analysismentioning

confidence: 93%

THERMAL STABILITY OF Pinus oocarpa AND MAIZE COB PARTICLEBOARDS

et al. 2015

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Agricultural waste materials are generated in large quantities in Brazil. These can accumulate and cause serious environmental problems. One of the most commonly generated wastes in the brazilian agricultural culture is the maize cob. Being lignocellulosic in nature, the maize cob can find use as the raw material in the production of particleboards mainly concerned with furniture making. Therefore, studies regarding its thermal stability and fire resistance would be interesting. The aim of this study was to evaluate the combustibility and thermal stability of the particleboards produced from maize cob and Pinus oocarpa wood. The percentages in which maize cob was associated with Pinus oocarpa were 0%, 25%, 50%, 75% and 100%. The panels were produced using 8% urea-formaldehyde and 1% paraffin. The pressing cycle parameters included: temperature 150 °C, pressure of 3.92 MPa during 10 min. The combustibility curve analysis showed that the panels containing 25% content of maize cob had higher resistance to combustion. In general, the thermal stability decreased as the wood substitution by maize cob increased.Index terms: Agricultural wastes; combustion; thermal properties. RESUMOOs resíduos agrícolas são materiais gerados em grande quantidade no Brasil, que podem se acumular, gerando problemas ambientais. Um dos resíduos mais gerados nas culturas agrícolas do Brasil é o sabugo de milho. Sendo um material lignocelulósico, o sabugo poderia ser utilizado como matéria-prima na produção de painéis aglomerados, cuja principal utilização é no setor moveleiro. Portanto, estudos sobre sua estabilidade térmica e resistência ao fogo seriam de interesse relevante. Objetivou-se, neste trabalho, avaliar a combustibilidade e estabilidade térmica de painéis aglomerados produzidos com sabugo de milho e madeira de Pinus oocarpa. As porcentagens de sabugo de milho utilizadas foram de 0%, 25%, 50%, 75% e 100% associadas com partículas de madeira de Pinus oocarpa. Os painéis foram produzidos com 8% de ureia-formaldeído e 1% de parafina. Os parâmetros do ciclo de prensagem foram: temperatura de 150 ºC, pressão de 3,92 MPa e tempo de 10 min. A análise das curvas de combustibilidade mostrou que os painéis, contendo 25% de sabugo, foram mais resistentes à combustão. Em geral, a estabilidade térmica decaiu à medida que foi aumentada a substituição de madeira por sabugo de milho.Termos para indexação: Resíduos agrícolas; combustão; propriedades térmicas.

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“…The first degradation occurred between 30 and 100 °C, due to the evaporation of water and moisture inside the ETSS. The second peak was identified between 180 and 350 °C and is indicative of the degradation of hemicelluloses and cellulose (Lv et al 2010;Poletto et al 2012. The third peak was identified at a temperature range of 400 to 500 °C and was due to the degradation of the lignin.…”

Section: Thermal Propertiesmentioning

confidence: 99%

Surface Modification of Elateriospermum tapos Seed Shell Recycled Polypropylene Composites

et al. 2015

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The influence of the filler content and surface modification of Elateriospermum tapos seed shell (ETSS)-filled recycled polypropylene (rPP) on the tensile, thermal, and morphological properties was investigated. Maleic acid (MA) was used for the chemical modification of ETSS. It was found that increasing the ETSS content decreased the tensile strength and elongation at break of composites. However, the modulus of elasticity increased with the addition of ETSS. The thermal properties of composites were examined using thermal analysis (TGA) and differential scanning calorimetry (DSC). The addition of ETSS indicated better thermal stability of rPP/ETSS composites. The degree of crystallinity (Xc) of the composites decreased with increasing ETSS content. The tensile strength and modulus of elasticity of modified composites was higher than unmodified composites. Surface modification with maleic acid increased the thermal stability and crystallinity of the modified rPP/ETSS composites. Scanning electron microscopy showed that the filler-matrix interaction improved with the modification of ETSS with maleic acid.

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Thermal decomposition of wood: Influence of wood components and cellulose crystallite size

Cited by 483 publications

References 35 publications

Isolation of Nanocrystalline Cellulose from oil palm empty fruit bunch – A response surface methodology study

Isolation of Nanocrystalline Cellulose from oil palm empty fruit bunch – A response surface methodology study

THERMAL STABILITY OF Pinus oocarpa AND MAIZE COB PARTICLEBOARDS

Surface Modification of Elateriospermum tapos Seed Shell Recycled Polypropylene Composites

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