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Thermal behavior of cellulose acetate produced from homogeneous acetylation of bacterial cellulose
(Elsevier B.V., 2008-05-30)
Cellulose acetate (CA) is one of the most important cellulose derivatives and its main applications are its use in membranes, films, fibers, plastics and filters. CAs are produced from cellulose sources such as: cotton, ...
Acetylation of cellulose in LiCl-N,N-dimethylacetamide: first report on the correlation between the reaction efficiency and the aggregation number of dissolved cellulose
(SPRINGER, 2011)
The acylation of three cellulose samples by acetic anhydride, Ac(2)O, in the solvent system LiCl/N,N-dimethylacetamide, DMAc (4 h, 110 A degrees C), has been revisited in order to investigate the dependence of the reaction ...
Acetylation of bacterial cellulose catalyzed by citric acid: Use of reaction conditions for tailoring the esterification extent
(Elsevier, 2016-11)
Bacterial cellulose (BC) nanoribbons were partially acetylated by a simple direct solvent-free route catalyzed by citric acid. The assay of reaction conditions within chosen intervals (i.e. esterification time (0.5–7 h), ...
Some aspects of acetylation of untreated and mercerized sisal cellulose
(Sociedade Brasileira de Química, 2010)
We report here on some aspects of the acetylation in LiCl/N,N-dimethylacetamide, DMAc, of untreated and mercerized sisal cellulose, hereafter designated as sisal and M-sisal, respectively. Fiber mercerization by NaOH ...
Simple citric acid-catalyzed surface esterification of cellulose nanocrystals
(Elsevier, 2017-02)
A simple straightforward route for the surface esterification of cellulose nanocrystals (CNC) is herein proposed. CNC obtained from microcrystalline cellulose were acetylated using as catalyst citric acid, a α-hydroxy acid ...
Naturally occurring alfa-hydroxy acids: Useful organocatalysts for the acetylation of cellulose nanofibres
(Bentham Science Publishers, 2016-03)
Cellulose nanoribbons obtained from bacterial fermentation have been esterified by means of a solventless organocatalytic route. The esterification methodology involves acetic anhydride as acylant and three different ...
Biocomposites based on renewable resource: Acetylated and non acetylated cellulose cardboard coated with polyhydroxybutyrate
(Elsevier, 2009-10)
Renewable resource based bilayer films were prepared from polyhydroxybutyrate film (PHB) and cellulose cardboard via compression molding, containing 5, 10, 15 and 20 wt% of PHB. The effects of PHB contents on moisture ...
Characterization and application of cellulose acetate synthesized from sugarcane bagasse
(2017-07-01)
The synthesis and application of cellulose acetate (CA) from sugarcane bagasse were investigated. Firstly, cellulose was extracted by a sequential treatment with H2SO4 (10% v/v), NaOH (5% w/v), EDTA (0.5% w/V), and H2O2 ...
Sisal cellulose acetates obtained from heterogeneous reactions
(BUDAPEST UNIV TECHNOL & ECON, 2008)
In the present work, cellulose obtained from sisal, which is a source of rapid growth, was used. Cellulose acetates were produced in heterogeneous medium, using acetic anhydride as esterifying agent and iodine as catalyst, ...