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Physico-Chemical and Thermal Characterization of Some Lignocellulosic Fibres: Ananas comosus (AC), Neuropeltis acuminatas (NA) and Rhecktophyllum camerunense (RC)

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Document pages: 18 pages

Abstract: This paper focuses on the study of the physical,biochemical, structural, and thermal properties of plant fibres of Rhecktophyllumcamerunense (RC), Neuropeltis acuminatas (NA) and Ananas comosus (AC) from the equatorial region of Cameroon. The traditional use of thesefibres inspired researchers to investigated their properties. This study aimsat improving the state of knowledge with a view to diversifying applications.The fibres are extracted by retting. Then, their apparent density was measuredfollowing the ASTM D792 standard and their water moisture absorption andmoisture content were also evaluated. Their molecular structure was studied byATR-FTIR spectroscopy. A quantitative analysis of the biochemical compositionwas performed according to the analytical technique for the pulp and paperindustry (TAPPI). A TGA DSC analysis was also performed. The results revealthat the AC, NA and RC fibres have densities of 1.26 ± 1.06, 0.846 ± 0.13 and0.757 ± 0.08 g·cm-3 respectively. They are also hydrophilic with awater absorption rate of 188.64 ± 11.94 , 276.16 ± 8.07 and 198.17 ± 20 .They have a moisture content of 12.21 , 10.36 and 9.37 . The studied fibresexhibit functional groups that are related to the presence of hemicellulose,pectin, lignin and cellulose. The cellulose crystallinity index was found to be67.99 , 46.5 and 59.72 respectively. The fibres under study have thefollowing chemical composition: an extractive content of 3.07 , 14.77 and8.74 ; a pectin content of 4.15 , 7.69 and 3.45 ; a hemicellulose content of4.90 , 15.33 and 7.42 ; a cellulose content of 68.11 , 36.08 and 65.15 ; alignin content of 12.01 , 25.15 and 16.2 ; and an ash content of 0.27 , 1.53 and 0.47 respectively. The thermal transitions observed on the thermogramscorrelate with the TAPPI chemical composition. It is observed that these fibresare thermally stable up to temperatures of 200°C, 220°C and 285°C. Theseresults make it possible to envisage uses similar to those of sisal, hemp andflax fibres.

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