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- W2316107052 abstract "This review describes several methods for activating cellulose so that it dissolves in N,Ndimethylacetamide/ lithium chloride and can then be analyzed by size exclusion chromatography (SEC) and light scattering for the determination of molar mass and molar mass distribution (MMD). This contribution lists the effects of these methods and approaches on the molar mass distribution of cellulose. Cellulose I and cellulose II behave differently and are considered separately. The activation procedures are grouped according to mechanical, chemical, and biological mechanisms. The mechanical processes include milling, freeze drying, steam explosion, and ultrasonic treatment, while chemical mechanisms are heating, irradiation, alkaline pretreatment, and derivatization strategies are discussed. Treatments with ethylene diamine and ionic liquids are also summarized from chemical aspects. Enzymes represent the biological strategy for treating solubility problems involving cellulose. These activation mechanisms are reviewed with regard to their efficiency, effect on MMD, and possible side reactions. Keywords: Accessibility, activation, derivatization, dissolution, enzyme, ethylene diamine, freeze-drying, heating, hornification, hydrogen bond, irradiation, milling, sodium borohydrate, sodium hydroxide, solvent exchange, steam explosion, swelling, ultrasonication." @default.
- W2316107052 created "2016-06-24" @default.
- W2316107052 creator A5004406916 @default.
- W2316107052 creator A5007156360 @default.
- W2316107052 creator A5011495446 @default.
- W2316107052 creator A5014216036 @default.
- W2316107052 creator A5057851405 @default.
- W2316107052 creator A5058047897 @default.
- W2316107052 date "2014-01-31" @default.
- W2316107052 modified "2023-10-14" @default.
- W2316107052 title "Finally Dissolved! Activation Procedures to Dissolve Cellulose in DMAc/LiCl Prior to Size Exclusion Chromatography Analysis – A Review" @default.
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