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Jute Reinforced Composite Technology |
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Diversification |
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Effect of Moisture on Jute Fibres |
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Diversification of Jute Fibres | |||||
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Jute Diversification -NCJD - Jute Service centres | |||||
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Jute Fancy Bags | |||||
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Jute Based Handicrafts & Novelties |
With increase in relative humidity up to 70%, the tenacity and Young’s modulus of jute increases but beyond 70%, a decrease is observed. Thus, it is essential to pre-treat the jute fibre so that its moisture absorption is reduced and the wet ability by the resin is improved. |
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Jute Based Consumer Items | |||||
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Geo Jute & Jute Geotextiles |
Modification of Jute Fibre |
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ITC | |||||
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Food Grade Bags | |||||
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Jute Reinforced Composites | |||||
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Jute in Fashion | |||||
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Food Grade Jute Bags | |||||
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Chemical means | ||||
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All these reagents are expected to block the hydroxy groups of jute thus making the fibres more hydrophobic. These surface modifiers penetrate and deposit into lumens of cell wall of fibre, minimising the possible extent of moisture ingress. Polymeric coating of jute fibre with phenol-formaldehyde or resorcinol formaldehyde resins by different approaches are highly effective in enhancing the reinforcing character of jute fibre, giving as high as 20-40% improvements in flexural strength and 40-60% improvements in flexural modulus. These modifications improve the fibre-matrix resin wettability and lead to improved bonding [6,7]. Jute can be graft copolymerised with vinyl monomers such as methyl methacrylate, ethyl acrylate, styrene, vinyl acetate, acrylonitrile and acrylamide in the presence of different redox initiator systems such as vanadium - cyclohexanol, vanadium - cyclohexanone, etc. | ||||||
Grafting of polyacrylonitrile (10-25%) imparts 10-30% improvements in flexural strength and flexural modulus of the composites. Grafting of polymethylmethacrylate is also effective in this respect, though to a lower degree. | ||||||
Jute-Polyester Composite |
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In order to overcome the poor adhesion between resin matrix and jute |
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There are several types of unsaturated polyester resin - general purpose, flexible, resilient, low-shrinkage (low profile), weather resistant, chemical resistant and fire resistant varieties. These polyester resins are prepared from a blend of phthalic anhydride and maleic anhydride esterified with propylene glycol to form linear polyester chains having molecular weights in the range 1000-3000. For Curing of such unsaturated polyester resin with fibre, azo type initiators (R-N=N-R) and organic peroxides (R-O-O-R) are generally used. |
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