Journal
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
Volume -, Issue -, Pages -Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/03067319.2021.1972991
Keywords
Cellulose; acid hydrolysis; agro-industrial waste; Oryza sativa L; nanocellulose
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Funding
- National Council of Science and Technology (CONACYT), Mexico [6401/2020]
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This study aimed to extract nanocellulose from rice agricultural waste, achieving high cellulose yield and purity close to commercial standards through a series of chemical treatments and analysis, demonstrating the potential of using this waste as a source of nanocellulose.
The lack of environmental awareness of agricultural producers is one of the challenges facing the problem of agro-industrial waste, coupled with few resources allocated to the development of new technologies and poor government policies for the management of such waste. An important potential has recently been recognised, with the obtaining of cellulose as the basis of the production of nano biocomposites. The objective of this work was the obtaining and characterisation of cellulose and nanocellulose from agro-industrial residues of rice (Oryza sativa L.) Var. 'Morelos A-2010', in Morelos state. The methodology used included the analysis of husk samples with three replicas, ground and sieved, which were processed by alkaline extraction (NaOH) 5%, bleaching with sodium hypochlorite 1%, followed by a pretreatment with hydrochloric acid (HCl) 0.65%. After drying, the cellulose was subjected to acid hydrolysis with (H2SO4) at 64% and then a sonication process, washings with low centrifugation and final drying of the fibre. The final product was characterised by spectrum in (FTIR), (DSC) and visualisation of its morphology, by Scanning Electron Microscopy (SEM). The results showed potential yields of 29 to 41% cellulose and a purity similar to the commercial standard of crystalline cellulose, which evidenced the possibility of using this agro-industrial by- product of Var rice. 'Morelos A-2010' as a source for obtaining nanocellulose in the region.
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