NDLI: Surface only modification of bacterial cellulose nanofibres with organic acids

Content Provider	Springer Nature Link
Author	Lee, Koon Yang Quero, Franck Blaker, Jonny J. Hill, Callum A. S. Eichhorn, Stephen J. Bismarck, Alexander
Copyright Year	2011
Abstract	Bacterial cellulose (BC) nanofibres were modified only on their surface using an esterification reaction with acetic acid, hexanoic acid or dodecanoic acid. This reaction rendered the extremely hydrophilic surfaces of BC nanofibres hydrophobic. The hydrophobicity of BC increased with increasing carbon chain length of the organic acids used for the esterification reaction. Streaming (zeta-) potential measurements showed a slight shift in the isoelectric point and a decrease in ζplateau was also observed after the esterification reactions. This was attributed to the loss of acidic functional groups and increase in hydrophobicity due to esterification of BC with organic acids. A method based on hydrogen/deuterium exchange was developed to evaluate the availability of surface hydroxyl groups of neat and modified BC. The thermal degradation temperature of modified BC sheets decreased with increasing carbon chain length of the organic acids used. This is thought to be a direct result of the esterification reaction, which significantly reduces the packing efficiency of the nanofibres because of a reduction in the number of effective hydrogen bonds between them.
Starting Page	595
Ending Page	605
Page Count	11
File Format	PDF
ISSN	09690239
Journal	Cellulose
Volume Number	18
Issue Number	3
e-ISSN	1572882X
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-03-19
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bacterial cellulose Surface modification and characterisation Organic acid esterification Zeta-potential Dynamic vapour sorption Bioorganic Chemistry Polymer Sciences Organic Chemistry Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Polymers and Plastics

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