Supramolecular Structure Characterization of Cellulose II Nanowhiskers Produced by Acid Hydrolysis of Cellulose I Substrates

2012 ◽  
Vol 13 (2) ◽  
pp. 570-578 ◽  
Author(s):  
Gilles Sèbe ◽  
Frédérique Ham-Pichavant ◽  
Emmanuel Ibarboure ◽  
Akissi Lydie Chantal Koffi ◽  
Philippe Tingaut
Keyword(s):  
Acid Hydrolysis ◽  
Supramolecular Structure ◽  
Structure Characterization ◽  
Cellulose Ii ◽  
Cellulose I ◽  
Hydrolysis Of Cellulose ◽  
Hydrolysis Of

Comprehensive morphological and structural investigation of cellulose I and II nanocrystals prepared by sulphuric acid hydrolysis

RSC Advances ◽  
2016 ◽  
Vol 6 (79) ◽  
pp. 76017-76027 ◽  
Author(s):  
Wilson Pires Flauzino Neto ◽  
Jean-Luc Putaux ◽  
Marcos Mariano ◽  
Yu Ogawa ◽  
Harumi Otaguro ◽  
...  
Keyword(s):  
Acid Hydrolysis ◽  
Sulphuric Acid ◽  
Structural Investigation ◽  
Wood Pulp ◽  
Cellulose I ◽  
Eucalyptus Wood ◽  
Hydrolysis Of Cellulose ◽  
Hydrolysis Of

CNCs were produced from eucalyptus wood pulp by (i) classical sulphuric acid hydrolysis, (ii) acid hydrolysis of cellulose previously mercerized by alkali, (iii) solubilization of cellulose in sulphuric acid and subsequent recrystallization in water.

Structure of Regenerated Celluloses Treated with Ionic Liquids and Comparison of their Enzymatic Digestibility by Purified Cellulase Components

2012 ◽  
Vol 65 (11) ◽  
pp. 1491 ◽  
Author(s):  
Masahiro Mizuno ◽  
Shuji Kachi ◽  
Eiji Togawa ◽  
Noriko Hayashi ◽  
Kouichi Nozaki ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Crystal Form ◽  
Regenerated Cellulose ◽  
Cellulose Ii ◽  
Cellulose I ◽  
Acid Moiety ◽  
Amino Acid Moiety ◽  
Hydrolysis Of Cellulose ◽  
Hydrolysis Of ◽  
Disordered Chain

In this study, regenerated celluloses were prepared from microcrystalline cellulose (MCC) by treatment with three ionic liquids (ILs) having 1-ethyl-3-methylimidazolium (Emim) as the cation, and the IL N-(2-methoxyethyl)-N,N-diethyl-N-methylammonium alanine ([N221ME][Ala]), where the amino acid moiety is the anion. The crystal form of cellulose was transformed from cellulose I to cellulose II by dissolution with an IL and regeneration with anti-solvent. However, the crystallinity of the regenerated cellulose was different; the disordered chain region was increased in the order of [N221ME][Ala] < [Emim][OAc] < [Emim][DEP] < [Emim][Cl]. The monocomponent cellulase, especially endoglucanase, showed high hydrolyzing activity for regenerated cellulose compared with untreated cellulose. Furthermore, the degree of increase of hydrolyzing activity was almost coincident with the order of crystallinity. For the effective hydrolysis of cellulose treated with an IL, it is necessary to prepare the cellulase mixture containing an adequate ratio of each cellulase component according to crystal allomorph and the crystallinity of regenerated cellulose.

scholarly journals Acid Hydrolysis of Cellulose as the Entry Point into Biorefinery Schemes

ChemSusChem ◽  
2010 ◽  
Vol 3 (3) ◽  
pp. 296-296 ◽  
Author(s):  
Roberto Rinaldi ◽  
Ferdi Schüth
Keyword(s):  
Acid Hydrolysis ◽  
Entry Point ◽  
Hydrolysis Of Cellulose ◽  
Hydrolysis Of

scholarly journals New methods of acid hydrolysis of cellulose and plant raw materials

2021 ◽  
Vol 57 (1) ◽  
pp. 119-128
Author(s):  
V. S. Boltovsky
Keyword(s):  
Acid Hydrolysis ◽  
Plant Biomass ◽  
Raw Materials ◽  
Agricultural Waste ◽  
Feed Additives ◽  
Process Conditions ◽  
Catalytic Systems ◽  
Plant Raw Materials ◽  
Hydrolysis Of Cellulose ◽  
Hydrolysis Of

Prospects for the development of hydrolysis production are determined by the relevance of industrial use of plant biomass to replace the declining reserves of fossil organic raw materials and increasing demand for ethanol, especially for its use as automobile fuel, protein-containing feed additives that compensate for protein deficiency in feed production, and other products. Based on the review of the research results presented in the scientific literature, the analysis of modern methods of liquid-phase acid hydrolysis of cellulose and various types of plant raw materials, including those that differ from traditional ones, is performed. The main directions of increasing its efficiency through the use of new catalytic systems and process conditions are identified. It is shown that the most promising methods for obtaining monosaccharides in hydrolytic processing of cellulose and microcrystalline cellulose, pentosan-containing agricultural waste and wood, are methods for carrying out the process at elevated and supercritical temperatures (high-temperature hydrolysis), the use of new types of solid-acid catalysts and ionic liquids. 

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