Hydrocelluloses with Low DP from Liquid Ammonia-Treated Cellulose

Acidic degradation of cellulose does not yield cellulose with degrees of polymerization in the range of 25-50 in a predictable or reproducible manner. Activation of cellulose by liquid ammonia treatment increases the rate of hydrolytic degradation in semidiluted hydrochloric acid while reducing the leveling off degree of polymerization. F..

Industrial Aspects of Cellulose Chemistry

Cellulose is a high performance polymer that is biocompatible and biodegradable and has applications in thermoplastics, fibers, coatings, and sophisticated rheology modifiers for raw materials used in construction and emulsion paints. Interest in cellulose as an industrial raw material is due to its availability as a renewable resource as..

Synthesis of Hydroxypropyl Derivatives of Chitin and Chitosan and Observation of Phase Behavior of Their Aqueous Solutions

Esterification of the polysaccharides with propylene oxide under various conditions synthesized hydroxypropyl derivatives of chitin and chitosan with different degrees of substitution. Hydrogen one and carbon 13 nuclear magnetic resonance(NMR) spectroscpy characterized the molecular structure of the hydroxypropyl derivatives. Equations ba..

Reactions of Carboxymethyl Cotton with Diamine and Aminosilane Cross-Linking Agents and Characterization of Final Materials

An investigation into the synthesis of carboxymethylated (CM) cottons generated at low pressures and the preparation of heat setting resins by crosslinking CM cottons with diethylenetriamine and amino silanes synthesized CM cotton by reacting cotton with chloroacetic acid in ethanolic sodium hydroxide in water at 20 pounds per square inch..

Ezymatic Hydrolysis Cellulose: Analysis by Use of Diffusion Equations

Because cellulose is an insoluble substrate, many kinetic equations used for enzymatic reactions in solution might be invalid. A novel approach to characterize the hydrolysis of cellulose by a cellulase mixture measured product formation at different flow rates for extended periods. A series of experiments measured weight loss and percent..

Blends of Cellulose with Synthetic Polymers

An investigation into the principles associated with the formation of miscible cellulose and synthetic polymer blends addressed cellulose/polyacrylonitrile, cellulose/polyvinyl alcohol, cellulose/polyvinyl pyrrolidone, and cellulose/poly(4-vinyl pyridine). Differential scanning calorimetry, dynamic mechanical relaxation, and solid state n..

Characteristics of Hemp Fibre from Low THC Hemp Varieties

A study grew three varieties of low THC hemp(Kompolti, Zolotonosha 11, and Zolotonosha 13) under a range of moisture conditions and seeding rates and measured the resulted maturity rate, retting time, and fiber tensile properties. Researchers collected samples at times ranging from 33 days to eight months and tank retted the plants from 4..

Dyeing Properties of Silk Produced by Silkworms Reared on Artificial and Mulberry Leaf Diets

Experiments comparing the dyeing properties of silk proteins produced by silkworms reared on an artificial diet of tofu cake(A) with those produced by silkworms reared on a diet of mulberry leaves (M) dyed raw silk samples with C.I. Acid Orange 7. The sericin content of A samples was 26.0 percent, and that of M samples was 23.7 percent. E..

Cell-Wall Bipsynthesis in Developing Cotton Fibers: Glucan Containing Oligomers in the 'Glue Matrix' Cotton Fabric, Wood, and Paper

Incubation of rehydrated cotton fibers in the presence of exogenous oligosaccharides, myo-inositol, and glycerol alters the profile of oligomers extracted from cotton fibers. These glycans also occur in the proteinaceous cell wall synthetic matrix(glue matrix) and as white flakes in developing cotton bolls. The time of day of harvesting d..

Microphotography Applied to the Textile Industry (Part 3).

Photography of textiles through light microscopes and analysis of these photographs provide a low cost test of a range of properties for the textile industry. Photomicrographs of silk fibers, coco fibers, and knit fabrics provided examples of the application. The use of stains expands the scope of this test and provides more information o..