Isolation of Cellulose Nanofibers: Effect of Biotreatment on Hydrogen Bonding Network in Wood Fibers
The use of cellulose nanofibres as high-strength reinforcement in nano-biocomposites is very enthusiastically being explored due to their biodegradability, renewability, and high specific strength properties. Cellulose, through a regular network of inter- and intramolecular hydrogen bonds, is organi...
Main Authors: | , |
---|---|
Format: | Article |
Language: | English |
Published: |
Hindawi Limited
2011-01-01
|
Series: | International Journal of Polymer Science |
Online Access: | http://dx.doi.org/10.1155/2011/279610 |
id |
doaj-e818dbf210014d8a9e505d26faea0934 |
---|---|
record_format |
Article |
spelling |
doaj-e818dbf210014d8a9e505d26faea09342020-11-24T23:05:21ZengHindawi LimitedInternational Journal of Polymer Science1687-94221687-94302011-01-01201110.1155/2011/279610279610Isolation of Cellulose Nanofibers: Effect of Biotreatment on Hydrogen Bonding Network in Wood FibersSreekumar Janardhnan0Mohini Sain1Department of Chemical Engineering & Applied Chemistry, University of Toronto, 200 College Street, Toronto, ON, M5S 3E5, CanadaDepartment of Chemical Engineering & Applied Chemistry, University of Toronto, 200 College Street, Toronto, ON, M5S 3E5, CanadaThe use of cellulose nanofibres as high-strength reinforcement in nano-biocomposites is very enthusiastically being explored due to their biodegradability, renewability, and high specific strength properties. Cellulose, through a regular network of inter- and intramolecular hydrogen bonds, is organized into perfect stereoregular configuration called microfibrils which further aggregate to different levels to form the fibre. Intermolecular hydrogen bonding at various levels, especially at the elementary level, is the major binding force that one need to overcome to reverse engineer these fibres into their microfibrillar level. This paper briefly describes a novel enzymatic fibre pretreatment developed to facilitate the isolation of cellulose microfibrils and explores effectiveness of biotreatment on the intermolecular and intramolecular hydrogen bonding in the fiber. Bleached Kraft Softwood Pulp was treated with a fungus (OS1) isolated from elm tree infected with Dutch elm disease. Cellulose microfibrils were isolated from these treated fibers by high-shear refining. The % yield of nanofibres and their diameter distribution (<50 nm) isolated from the bio-treated fibers indicated a substantial increase compared to those isolated from untreated fibers. FT-IR spectral analysis indicated a reduction in the density of intermolecular and intramolecular hydrogen bonding within the fiber. X-ray spectrometry indicated a reduction in the crystallinity. Hydrogen bond-specific enzyme and its application in the isolation of new generation cellulose nano-fibers can be a huge leap forward in the field of nano-biocomposites.http://dx.doi.org/10.1155/2011/279610 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Sreekumar Janardhnan Mohini Sain |
spellingShingle |
Sreekumar Janardhnan Mohini Sain Isolation of Cellulose Nanofibers: Effect of Biotreatment on Hydrogen Bonding Network in Wood Fibers International Journal of Polymer Science |
author_facet |
Sreekumar Janardhnan Mohini Sain |
author_sort |
Sreekumar Janardhnan |
title |
Isolation of Cellulose Nanofibers: Effect of Biotreatment on Hydrogen Bonding Network in Wood Fibers |
title_short |
Isolation of Cellulose Nanofibers: Effect of Biotreatment on Hydrogen Bonding Network in Wood Fibers |
title_full |
Isolation of Cellulose Nanofibers: Effect of Biotreatment on Hydrogen Bonding Network in Wood Fibers |
title_fullStr |
Isolation of Cellulose Nanofibers: Effect of Biotreatment on Hydrogen Bonding Network in Wood Fibers |
title_full_unstemmed |
Isolation of Cellulose Nanofibers: Effect of Biotreatment on Hydrogen Bonding Network in Wood Fibers |
title_sort |
isolation of cellulose nanofibers: effect of biotreatment on hydrogen bonding network in wood fibers |
publisher |
Hindawi Limited |
series |
International Journal of Polymer Science |
issn |
1687-9422 1687-9430 |
publishDate |
2011-01-01 |
description |
The use of cellulose nanofibres as high-strength reinforcement in nano-biocomposites is very enthusiastically being explored due to their biodegradability, renewability, and high specific strength properties. Cellulose, through a regular network of inter- and intramolecular hydrogen bonds, is organized into perfect stereoregular configuration called microfibrils which further aggregate to different levels to form the fibre. Intermolecular hydrogen bonding at various levels, especially at the elementary level, is the major binding force that one need to overcome to reverse engineer these fibres into their microfibrillar level. This paper briefly describes a novel enzymatic fibre pretreatment developed to facilitate the isolation of cellulose microfibrils and explores effectiveness of biotreatment on the intermolecular and intramolecular hydrogen bonding in the fiber. Bleached Kraft Softwood Pulp was treated with a fungus (OS1) isolated from elm tree infected with Dutch elm disease. Cellulose microfibrils were isolated from these treated fibers by high-shear refining. The % yield of nanofibres and their diameter distribution (<50 nm) isolated from the bio-treated fibers indicated a substantial increase compared to those isolated from untreated fibers. FT-IR spectral analysis indicated a reduction in the density of intermolecular and intramolecular hydrogen bonding within the fiber. X-ray spectrometry indicated a reduction in the crystallinity. Hydrogen bond-specific enzyme and its application in the isolation of new generation cellulose nano-fibers can be a huge leap forward in the field of nano-biocomposites. |
url |
http://dx.doi.org/10.1155/2011/279610 |
work_keys_str_mv |
AT sreekumarjanardhnan isolationofcellulosenanofiberseffectofbiotreatmentonhydrogenbondingnetworkinwoodfibers AT mohinisain isolationofcellulosenanofiberseffectofbiotreatmentonhydrogenbondingnetworkinwoodfibers |
_version_ |
1725626062581268480 |