scholarly journals Characteristics of Natural Cellulose Fibres Extracted from Sri Lankan Rice Straw Varieties

2020 ◽  
Vol 31 (3) ◽  
pp. 72
Author(s):  
A. Ratnakumar ◽  
A. M. P. B. Samarasekara ◽  
D. A. S. Amarasinghe ◽  
L. Karunanayake
Keyword(s):  
Rice Straw ◽  
Sri Lankan ◽  
Cellulose Fibres ◽  
Natural Cellulose

scholarly journals A STRATEGY FOR DETERMINING THE CHEMICAL COMPOSITION OF RICE STRAW

2020 ◽  
Vol 54 (9-10) ◽  
pp. 983-991
Author(s):  
MAHESHANI P. A. NANAYAKKARA ◽  
WALAGEDARA G.A. PABASARA ◽  
ADIKARI M.P.B. SAMARASEKARA ◽  
DON A.S. AMARASINGHE ◽  
LALEEN KARUNANAYAKE
Keyword(s):  
Rice Straw ◽  
Research Work ◽  
Extraction Process ◽  
Chemical Extraction ◽  
Cellulose Content ◽  
Sri Lankan ◽  
Asian Countries ◽  
Chemical Methods ◽  
Rice Varieties ◽  
Wet Chemical

As rice is the staple food of most Asian countries, rice straw has become one of the largest agricultural wastes in Asia. It has not been subjected to adequate value additions yet. However, it has excellent potential to be converted to valuable materials, as it contains a significant amount of cellulose. Therefore, it would be beneficial in many ways to identify the cellulose yields of straws of different rice varieties. In general, the cellulose content of biomass is determined by wet chemical methods. Though these methods are accurate, they are not convenient to use under industrial conditions. This research work focuses on investigating the potential of thermal analysis as an alternative way to predict cellulose yields. For the study, rice straws of most frequently cultivated traditional Sri Lankan rice varieties: Suwandel and Raththal, as well as technically modified Sri Lankan rice varieties: BG300 and BG352, were selected. The results obtained by the proposed method were validated by an established three-step chemical extraction process.

Polypropylene-Based Biocomposites Reinforced by Tailor-Modified Cellulose Fibers and Microfibrils

2013 ◽  
Vol 671-674 ◽  
pp. 1826-1829
Author(s):  
Yuan Feng Pan ◽  
Shu Zhao Li ◽  
Hui Ning Xiao
Keyword(s):  
Cellulose Fibers ◽  
Optimal Dosage ◽  
Reinforced Composites ◽  
Cellulose Fibres ◽  
Natural Cellulose ◽  
Cellulose Fibrils ◽  
Core Shell Structure ◽  
Cationic Latex ◽  
Modified Cellulose

Two approaches of improving the toughness of polypropylene (PP)-based composites reinforced by natural cellulose fibers were developed. The surface modification of cellulose fibrils (CMF) or fiber by either in-situ grafting polymerization of butyl acrylate (BA) on CMF surface via an atom transfer radical polymerization (ATRP) or adsorbing the cationic polymeric latex with core-shell structure on fiber surfaces was performed; and resulting fibers or CMF were used as reinforments in an attempt to enhance the toughness of the PP-based composites. The results of mechanical properties indicated that the flexure, tensile, and impact strengths of the CMF-g-PBA reinforced composites were all improved. The cellulose fibres treated by cationic latex also showed the same trend. The optimal dosage of latex for hydrophobic-modifying fibers was also identified.

scholarly journals Influence of accompanying substances of hemp fibres on their electric resistance

2006 ◽  
Vol 60 (1-2) ◽  
pp. 33-38 ◽  
Author(s):  
Biljana Pejic ◽  
Koviljka Asanovic ◽  
Mirjana Kostic ◽  
Petar Skundric ◽  
Tatjana Mihajlidi
Keyword(s):  
Chemical Composition ◽  
Breaking Strength ◽  
Antimicrobial Effect ◽  
Natural Fibre ◽  
Electric Resistance ◽  
Cellulose Fibres ◽  
Natural Cellulose ◽  
Hemp Fibres ◽  
Modification Treatment

Hemp fibres belong to the group of natural, cellulose bast fibres. These fibres have exceptional properties such as: antimicrobial effect, absence of allergy effect, extraordinary sorption properties, good electro-physical properties (small static electricity in regard to other cellulose fibres) as well as high values of breaking strength (the natural fibre with the highest strength). However, hemp fibres have some defects: heterogeneous chemical composition, large quantity of accompanying substances (lignin pectins, waxes) and unsatisfactory fineness and eveness. It is possible to a great extent to eliminate or reduce, the defects of hemp fibres by of appropriate modification treatments. In order to determine the appropriate modification treatment of hemp fibres, the dependences between the chemical composition, fineness and electric resistance of hemp fibres were presented in this paper. In the experimental part of the paper, by the application of a procedure for the determination of the chemical composition, the accompanying supstances of hemp fibres were gradually removed. After each phase some fibrous substrates were separated. After that the fineness and electric resistance were determined. This experiment was conducted in order to define the influence of each component of hemp fibres on the fineness and electric resistance. In this paper, hemp fibres were modified by an aqueous solution of sodium hydroxide, under different conditions of modification. The influence of modification conditions on the fineness and electric resistance were studied.

Utilisation of natural cellulose fibres in wastewater treatment

Cellulose ◽  
2018 ◽  
Vol 25 (9) ◽  
pp. 4887-4903 ◽  
Author(s):  
Nur Syazwani Abd Rahman ◽  
Mohd Firdaus Yhaya ◽  
Baharin Azahari ◽  
Wan Ruslan Ismail
Keyword(s):  
Wastewater Treatment ◽  
Cellulose Fibres ◽  
Natural Cellulose

scholarly journals Extraction and characterization of natural fibres form Elettaria Cardamomum

2021 ◽  
Vol 69 (2) ◽  
pp. 30-33
Author(s):  
Murugesan Sumithra ◽  
Gayathri Murugan
Keyword(s):  
Chemical Composition ◽  
Good Alternative ◽  
Single Fibre ◽  
Natural Fibres ◽  
Fibre Strength ◽  
Cellulose Fibres ◽  
Elettaria Cardamomum ◽  
Natural Cellulose ◽  
Alternative Sources

Natural fibres are one of the good alternative sources for replacing synthetic fibres and reinforcing polymer matrices because of their eco-friendly nature. The present study was undertaken to investigate the fibres extract from Elettaria Cardamomum plant. The extracted Elettaria Cardamomum fibre was treated with NaOH for softening. Natural cellulose fibres extracted from Elettaria Cardamomum stems (ECS) have been characterized for their chemical composition and physical properties.The chemical composition of Elettaria Cardamomumstems (ECS) fi bres is, cellulose 60.44%, lignin 25.25%, wax 0.53%, ash 5.45%. Regarding physical properties of the fibres, single fibre strength was evaluated and the result was compared with cotton fibre and linen fibre.

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