Mechanical depolymerisation of acidulated cellulose: understanding the solubility of high molecular weight oligomers

Shrotri, Abhijit, Lambert, Lynette Kay, Tanksale, Akshat and Beltramini, Jorge (2013) Mechanical depolymerisation of acidulated cellulose: understanding the solubility of high molecular weight oligomers. Green Chemistry, 15 10: 2761-2768. doi:10.1039/c3gc40945g


Author Shrotri, Abhijit
Lambert, Lynette Kay
Tanksale, Akshat
Beltramini, Jorge
Title Mechanical depolymerisation of acidulated cellulose: understanding the solubility of high molecular weight oligomers
Journal name Green Chemistry   Check publisher's open access policy
ISSN 1463-9262
1463-9270
Publication date 2013-10
Sub-type Article (original research)
DOI 10.1039/c3gc40945g
Open Access Status Not Open Access
Volume 15
Issue 10
Start page 2761
End page 2768
Total pages 8
Place of publication Cambridge, United Kingdom
Publisher R S C Publications
Collection year 2014
Language eng
Abstract Water soluble oligomers of cellulose were produced by milling acidulated microcrystalline cellulose. Acids with low pKa were found to be more effective for the treatment. The yield of water soluble fraction was proportional to the increasing severity of milling or the acid amount. Soluble oligomers were found to have an average degree of polymerisation of ∼7 monomer units. High resolution NMR spectroscopy was used to determine the chemical structures of soluble oligomers. It was found that branched oligomers with α (1 → 6) linkages were formed, which increased their solubility in water and reduced the generation of monomers and dimers which may degrade during milling or subsequent hydrolysis-hydrogenation. The soluble oligomers showed excellent reactivity towards hydrolysis-hydrogenation in the presence of bi-metallic Ni-Pt/alumina catalyst. High yields (∼90%) of sorbitol and mannitol were obtained with only 1 h of reaction time.
Keyword Hydrolysis
Water
Catalysts
Depolymerisation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2014 Collection
Centre for Advanced Imaging Publications
 
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Created: Sun, 10 Nov 2013, 00:38:01 EST by System User on behalf of Centre for Advanced Imaging