Hydrogels of carboxymethylcellulose and bischloroformiate diethylene glycol

Perfluoroacylated Ethyl Cellulose: Synthesis, Characterization, and Gas Permeation Properties

“…Perfluoroacylation of ethyl cellulose ( 1 ) was carried out by using various perfluorinated acid anhydrides/chlorides as perfluoroacylating agents, THF as a solvent, and imidazole as a base, as shown in Scheme , and the results are summarized in Table . The DS Et of 1 was estimated to be 2.69, by calculating the integration ratio of methyl protons to the rest of the protons in 1 , indicating the presence of 0.31 hydroxy groups per anhydroglucose unit 14a) has a broad peak characteristic of the residual hydroxy groups (3200−3600 cm -1 ), which disappeared upon complete perfluoroacylation in polymers 2a − d .…”

“…Derivatization of polysaccharides starting from the organosoluble polymer has undoubtedly broadened the diversity of products and reaction paths. Despite many aforementioned remarkable features and organosolubility of ethyl cellulose, studies concerning the systematic investigation of chemical derivatization of ethyl cellulose are few and far between 14j-m Although the organofluorine compounds have engrossed substantial prominence as a new class of polymeric materials, trifluoroacetyl derivative is most likely the only fluorine-containing derivative of ethyl cellulose, reported so far .…”

“…Despite many aforementioned remarkable features and organosolubility of ethyl cellulose, studies concerning the systematic investigation of chemical derivatization of ethyl cellulose are few and far between 14j-m Although the organofluorine compounds have engrossed substantial prominence as a new class of polymeric materials, trifluoroacetyl derivative is most likely the only fluorine-containing derivative of ethyl cellulose, reported so far . Since, there have been a few reports concerning the incorporation of fluorinated substituents into ethyl cellulose and fluorine-containing groups often favor high gas permeability, − it is anticipated that the perfluoroacylated derivatives of ethyl cellulose will serve as interesting candidates for gas separation membranes.…”

Novel Regioselectively 6-Functionalized Cationic Cellulose Polyelectrolytes Prepared via Cellulose Sulfonates

“…[1] Solubility of cellulose in water can also be achieved by introducing anionic moieties. [2,3] Carboxymethyl cellulose is widely used, for example, in the food industry. The production capacity of carboxymethyl cellulose is estimated to be more than 300 000 tons per annum worldwide and this cellulose ether is considered to be the most important cellulose-based anionic polyelectrolyte.…”