Category Archives: Innovative Biofibers from Renewable Resources

Toxicity of the Solvent System

Despite the numerous advantages claimed by the NMMO process compared to the conventional cuprammonium and viscose processes, several concerns have been expressed on large-scale adoption of the NMMO process. The solvent (NMMO) itself is toxic and explosive by-products are generated during the process of dissolution. In addition, higher temperatures (>90 °C) and antioxidants are

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Honeybee Silks

Natural Protein Fibers Keywords Honeybee • Fiber cross section • Nanofibril • Amino acid Proteins produced by honeybees have distinct structure and properties compared to Bombyx mori or spider silks. Unlike the silkworm or spider silks that are composed of two filaments (brins) connected to each other, honeybee silk is formed by a single filament with a circular cross section […]

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Regenerated Cellulose Films and Biohybrid Yarns

Regenerated cellulose films were developed by dissolving bacterial cellulose in NMMO solutions [12Sha]. Bacterial cellulose (5 %) was added into aqueous NMMO solution and stirred at 100 °C for 2 h and the solution obtained was cast into films with the addition of 30 % glycerol as plasticizer. During the dissolution, bacterial cellulose was transformed from cellulose I structure to […]

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Innovative Biofibers from Renewable Resources

Sustaining the demand for raw materials to meet the needs of future generations will be one of the most challenging tasks for human kind. In addition, complying with the increasing stringent international protocols related to climate change and exploiting of natural resources will also increase the burden on the supply of raw materials and production of commodities. Future conflicts within […]

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Cross-Linking Chitosan Fibers

Chitosan fibers lack adequate stability under aqueous environments, and attempts have therefore been made to modify or cross-link the fibers using various approaches. Glyoxal was used to cross-link chitosan fibers, and the effect of cross-linking conditions on the structure and properties of the fibers were studied [05Yan1, 05Yan2]. Uncross-linked fibers had a tenacity of 1.2 g/den, and the tenacity improved […]

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Processing of Pineapple Leaf Fibers

Among the fibers obtained from various lignocellulosic agricultural by-products, PALF are the most widely used to develop yarns, fabrics, and other textiles. Yarns and fabrics have been made using 100 % PALF on the cotton, jute, and wool spinning systems. Raw and bleached PALF were processed on standard jute and flax spinning systems [88Gho]. Table 10.5 shows some of the […]

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Electrospun Starch Fibers

Pure starch was electrospun after dissolving in 95 % aqueous dimethylsulfoxide solution. The starch solution was extruded into an “electro-wetspinning” setup consisting of an ethanol bath. After electrospinning, the fibers were heat treated to increase crystallinity and later cross-linked using glutaraldehyde vapors to improve water stability [14Kon]. In another study, researchers have suggested that the forma­tion of electrospun starch fibers […]

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