Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 1091 for “"Cellulose"”.
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The attempted plasticization of cellulose from cellulose xanthate
… who suggested that a film prepared from a cellulose xanthate, in which the fiber form had been destroyed by some action other than by dilute alkali, should have interesting properties. The possibilities of such a material might be much greater if the destruction of the fiber form were …
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Novel cellulose esters
Research in cellulose esters in recent years has concentrated on creating a variety of novel esters with a wide range of thermal and mechanical properties. These cellulose derivatives can be used for membranes, coatings, polymer blends, and other products. Novel cellulose solvent systems …
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Cellulose Esters and Cellulose Ether Esters for Oral Drug Delivery Systems
… and consequently poor drug bioavailability. Cellulose ω-carboxyesters were designed and synthesized specifically for ASD preparations in Edgar lab that can meet the ASD expectations such as high Tg, recrystallization prevention and pH-triggered release due to the free -COOH groups. Rifampicin …
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Polymeranaloge Carbanilierung von Cellulose
Characterization of cellulose by its molecular weight distribution is afforded after polymeranalogeous dissolution. Additionally, a molecular dispersion of the polymer is a prerequisite. Common processes are dissolution of cellulose in dimethylacetamide-lithiumchloride, nitration and carbanilation. …
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Rapid pyrolysis of cellulose
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1981.
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Investigation of cellulose xanthate
I have attempted to synthesize cellulose xanthate in anhydrous liquid ammonia, and to analyze the product for combined sodium and sulphur, with the hope of determining the exact chemical composition of each C₆ unit of cellulose xanthate. It is the purpose of this work to study the xanthation of …
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Bio-inspired Cellulose Nanocomposites
… composites from isolated wood polymers namely cellulose and lignin, with a lamellar architecture. In the first phase of the study, adsorption of alkali lignin onto cationic surfaces was investigated using a quartz crystal microbalance with dissipation monitoring (QCM-D). Complete coverage of …
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Regioselective Synthesis of Cellulose Derivatives
Cellulose is the most abundant polysaccharide on earth and it is relatively a simple homopolymer with three hydroxyl groups, differing only subtly in reactivity. The position of substitution has a powerful influence on physical properties of cellulose derivatives. To better understand the structure …
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Chlorhexidine Interaction with Microcrystalline Cellulose
… stains due to chemical interactions with cellulose fibers. Previous research has identified compounds such as Parachloroaniline (PCA), which contribute to both toxicity and fiber degradation. This study aims to further analyze the breakdown products of chlorhexidine and sodium hypochlorite …
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Gel Development Using Cellulose Nanocrystals
Cellulose Nano Crystal (CNC) are naturally derived nanoparticles with a slender shape that own a remarkably high aspect ratio. Due to its mechanical properties with Young modulus in the range of 120-160 GPa and proven biocompatibility, CNC is an attractive nanoparticle for many applications. In the …
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The solvation of cellulose nitrate
… data concerning the state of solvation of cellulose derivatives dispersed in solvent-non solvent systems is rather limited. Since such derivatives possess a high commercial importance largely because of their ability to be dispersed and regenerated from solvent-non solvent systems by …
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Regioselective Synthesis of Cellulose Esters
Cellulose is an extraordinarily abundant polymer that can be harvested and purified from trees and other renewable sources. Cellulose derivatives have been widely used as coatings, optical films, fibers, molded objects, and matrices for controlled release. The properties of cellulose derivatives …
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Regioselective chlorination of cellulose esters
Chemical modification of cellulose has been of growing interest, owing to the abundance and processing challenges of natural cellulose. To date, etherification and esterification are the most effective strategies to modify physicochemical properties of cellulose and append new functionalities. …
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Analysis of nanofibrillar cellulose foam's deformation
Cellulose consists of a multitude of thin, long nanofibers with both crystalline and noncrystalline regions. If these fibers are isolated and broken down into lengthy, mostly crystalline polymers, they can then be reconstituted into novel materials, one which is foam. Nanofibrillar cellulose foam …
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Cellulose Nanofoams: 3D Printing and Characterization
… capabilities and mechanical properties of cellulose nanofibrils (CNF) nanofoams, and developing a reproducible methodology for printing customized three-dimensional (3D) structures using direct-ink-write (DIW) technology and molding. We developed composite nanofoams using TEMPO-modified …
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The solubility of cellulose acetate fractions
no abstract provided by author
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