Utilisation of natural cellulose fibres in wastewater treatment

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.

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Influence of accompanying substances of hemp fibres on their electric resistance

Hemijska industrija ◽

10.2298/hemind0602033p ◽

2006 ◽

Vol 60 (1-2) ◽

pp. 33-38 ◽

Cited By ~ 1

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.

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Extraction and characterization of natural fibres form Elettaria Cardamomum

Tekstilna industrija ◽

10.5937/tekstind2102030s ◽

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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