D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
D21H 11/10 (2006.01) D01C 1/02 (2006.01) D21B 1/02 (2006.01) D21B 1/04 (2006.01) D21C 1/00 (2006.01) D21H 11/18 (2006.01)
Patent
CA 2437616
Natural grown fibers are gaining a renewed interest, especially as a glass fiber substitute, partly due to ecological concerns. Natural fibers like hemp, flax, sisal, and jute; Agro-based fibres such as Bagasse, wheat straw etc and root crops like Rutabaga fibers hold potential for such innovations due to their availability and low cost. These natural fibers are bundles of individual strands of fibers held together by means of interface of pectin and lignin. Apart from the long fibers there are fibers, which are on much smaller scale and have 5-50 nm diameters and are thousands of manometer long. The objective is to isolate these nano-sized microfibrils, which are embedded in hydrated, amorphous matrix of hemicelluloses and pectin. Chemical treatment is done to remove the impurities like hemicelluloses and extractives since higher cellulose content in the fibre leads to higher strength and stiffness of the fibre and then individualization of the cellulose microfibrils done by using mechanical shear force with the help of cryocrushing and high-pressure defibrillization. These namo-sized microfibrils[also referred as namo-fibrils] could contribute towards producing composite materials of very high strength at a low cost in an environmentally friendly manner suitable for biocompatible medical devices, packaging and other high strength structural applications.
Bhatnagar Arpana
Sain Mohini M.
Bhatnagar Arpana
Na
Sain Mohini M.
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