ISOLATION OF CELLULOSE MICROFIBRILS – AN ENZYMATIC APPROACH

By Sreekumar Janardhnan, M. Sain. 2006

210 citations recorded by the source corpus.

Isolation and application of cellulose nano-fibers and microfibrils are expanding rapidly due to their environmental benefits and specific strength properties, especially in bio-composite science. In this research work, we have successfully developed and explored a novel bio-pretreatment for wood fibre that can substantially improve the yield of the current mechanical process applied to isolate cellulose microfibrils. Microfibrils are isolated in the laboratory through a combination of high shear refining, and subsequent cryocrushing under the presence of liquid nitrogen but at the expense of high-energy and is hampering the current momentum in the direction of their isolation on a sizable scale for any potential application. Any attempt to loosen up the microfibrils by either complete or partial destruction of the hydrogen bonds before the mechanical process will be a step forward in the quest for economical isolation of cellulose microfibrils. Bleached Kraft spruce Pulp was treated with OS1, a fungus isolated from Dutch Elm tree infected with Dutch elm disease at different treatment conditions. Cellulose microfibrils were isolated from these treated fibers by high shear refining followed by cryocrushing. The % yield of cellulose microfibrils based on their diameter showed a significant shift towards a lower diameter range after the high shear refining compared to yield of cellulose microfibrils from untreated fibres. The overall yield of cellulose microfibrils from the treated fibres did not show any sizeable decrease.

Subfields: Biomaterials, Biomedical Engineering, Plant Science

View Paper: https://www.semanticscholar.org/paper/534594517377a50de0ded177b6ab7a7318caf67d

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Citations in the corpus

CELLULOSIC NANOCOMPOSITES: A REVIEW (2008, background): “Janardhnan and Sain (2006) found that enzymatic treatment made it possible to achieve a smaller particle size range of cellulose, Hubbe et al. (2008).”
Microfibrillated cellulose and new nanocomposite materials: a review (2010, background): “MCC is a commercially available material mainly used as a rheology control agent and as a binder in the pharmaceutical industry (Janardhnan and Sain 2006).”
Different preparation methods and properties of nanostructured cellulose from various natural resources and residues: a review (2015, methodology): “Lindstrom et al. (2007) and Janardhnan and Sain (2006) decreased the energy consumption during the nanofiber isolation by using enzymatic pretreatment.”
Spherical cellulose nanoparticles preparation from waste cotton using a green method (2014, unknown): “Additionally, change in the intensity and width of the FTIR band in 3800–3000 cm−1 of hydrolyzed cotton showed that the cellulase enzyme could weaken and split the hydrogen bonds in the cellulose structure as reported by others [50,51] (Fig.”
A comparative study of energy consumption and physical properties of microfibrillated cellulose produced by different processing methods (2011, background): “Since this latter method does not produce very fine fibrils, it is limited to cellulose fibrils from primary cell walls (Chakraborty et al. 2005; Janardhnan and Sain 2006).”