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Dynamic elastic modulus of modified cotton fibres

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Title Dynamic elastic modulus of modified cotton fibres
 
Creator Ishaq, Abdurrahman
Umar, Yunusa
 
Subject Birefringence
Cellulose III
Dynamic elastic modulus
G. hirsutum Linn
Helical angle
Lattice structures
Regenerated cellulose I
 
Description 405-410
The dynamic elastic modulus of three cultivated varieties
of G. hirsutum Linn, namely Samaru 26J Nigeria, Samaru 26J
Glasgow and an unspecified American upland has been
studied at different stages of fibre maturity using visco-elastomer.
The dynamic modulus is found to be strongly dependent
on both the maturity and the optical orientation angle.
To eliminate the effect of convolutions on both the dynamic
modulus and the helix angle, fibres are treated in liquid ammonia
to get Cellulose III lattice structure and revert back to Cellulose I
lattice structure using distilled water. Both the X- ray
diffractograms and the scanning electron micrographs also
confirm this finding. Maturity ratio is shown to have a very
strong effect on the dynamic elastic modulus and not the
age of the fibre. Fibres of similar maturity ratio show similar
dynamic modulus, irrespective of the environmental conditions.
Cellulose III and Cellulose I regenerated fibres have about the
same dynamic modulus values. This shows that treatment does
produce profound changes in the gross structure and calls for a
fresh look at the swelling mechanism in both structures, a possible
disruption of the H- bonding systems of cellulose by both
treatments.
 
Date 2021-12-24T07:20:16Z
2021-12-24T07:20:16Z
2021-12
 
Type Article
 
Identifier 0975-1025 (Online); 0971-0426 (Print)
http://nopr.niscair.res.in/handle/123456789/58702
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJFTR Vol.46(4) [December 2021]