Results 11 to 20 of about 392,325 (247)

Innovative Bio-nanocomposites Based on Bacterial Cellulose [PDF]

open access: yes, 2011
PhDA variety natural materials that are environmentally friendly, renewable and low cost have been created. Bacterial cellulose (BC), which is produced by a harmless bacterium, Acetobacter xylinum, has been used as a reinforcement agent to form ...
Gea, Saharman
core   +4 more sources

Influence of Calcium Silicate and Hydrophobic Agent Coatings on Thermal, Water Barrier, Mechanical and Biodegradation Properties of Cellulose

open access: yesNanomaterials, 2021
Thin films of cellulose and cellulose–CaSiO3 composites were prepared using 1-ethyl-3-methylimidazolium acetate (EMIMAc) as the dissolution medium and the composites were regenerated from an anti-solvent.
Saravanan Chandrasekaran   +3 more
doaj   +1 more source

Mechanism of Esters Formation during Cellulose Liquefaction in Sub- and Supercritical Ethanol

open access: yesBioResources, 2014
Cornstalk cellulose was liquefied in sub- and supercritical ethanol using an autoclave at 320 °C with 160 mL of ethanol. The effects of reaction time on esters formation during cellulose liquefaction were investigated. The yield of esters was 10.0% at 30
Cheng-zheng Tang   +3 more
doaj   +1 more source

Cellulosic materials as biopolymers and supercritical CO2as a green process: chemistry and applications [PDF]

open access: yes, 2012
In this review, we describe the use of supercritical CO2 (scCO2) in several cellulose applications. The focus is on different technologies that either exist or are expected to emerge in the near future.
Yaocihuatl Medina-Gonzalez   +5 more
core   +1 more source

The undesirable acetylation of cellulose by the acetate ion of 1-ethyl-3-methylimidazolium acetate [PDF]

open access: yes, 2011
The ionic liquid (IL) 1-ethyl-3-methylimidazolium acetate ([C2mim]OAc) is considered to be an inert solvent of cellulose and lignocellulosic biomass. Acetylation (1.7 % mol, or DS 0.017) of cellulose after dissolution in [C2mim]OAc (150 °C for 20 min ...
Leslie Alan Edye   +5 more
core   +1 more source

Oxidation of cellulose in pressurized carbon dioxide [PDF]

open access: yes, 2009
This work presents first results upon oxidation of type II cellulose by nitrogen dioxide dissolved in carbon dioxide at high pressure. This reaction leads to oxidized cellulose, a natural-based bioresorbable fabric used for biomedical applications.
Montanari, Suzelei   +4 more
core   +1 more source

Grewia polysaccharide as a pharmaceutical excipient in matrix tablets [PDF]

open access: yes, 2011
Matrix-based tablets using different concentrations of grewia gum, and the model drug ibuprofen, were prepared using a wet granulation technique. Similar formulations were also prepared using HPMC, guar gum or ethyl cellulose as the polymer matrix.
Conway, Barbara R   +5 more
core   +4 more sources

Cellulose-Based Bio- and Nanocomposites: A Review [PDF]

open access: yes, 2010
Cellulose macro- and nanofibers have gained increasing attention due to the high strength and stiffness, biodegradability and renewability, and their production and application in development of composites.
de Oliveira, Marcelo Firmino   +843 more
core   +3 more sources

Data on the application of the focused beam reflectance measurement (FBRM): A process parameters dataset for the ethyl cellulose (EC) microparticles preparation by the solvent evaporation method

open access: yesData in Brief, 2020
The data article refers to the paper “Effect of solvent type on preparation of ethyl cellulose microparticles by solvent evaporation method with double emulsion system using focused beam reflectance measurement” [1].
Muhaimin Muhaimin, Roland Bodmeier
doaj   +1 more source

Microstructures of cellulose coagulated in water and alcohols from 1-ethyl-3-methylimidazolium acetate : contrasting coagulation mechanisms [PDF]

open access: yes, 2019
: Coagulation of cellulose solutions is a process whereby many useful materials with variable microstructures and properties can be produced. This study investigates the complexity of the phase separation that generates the structural heterogeneity of ...
Hedlund, Artur   +10 more
core   +1 more source

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