Research Progress on Cellulose Modification Methods and Adsorption Properties
Cellulose is the most typical representative of biomass resources,and many researchers focus on the modification of cellulose and its application in adsorption.This paper first introduces the pretreatment of natural cellulose by mechanical crushing method,high-temperature cooking method,low temperature crushing method,steam blasting method,microwave/radiation method,acid method,alkali method and bio-logical method,and then introduces the modification methods of cellulose,mainly including:oxidation modification,esterification modification,etherification modification and grafting modification.Oxidative modification can introduce aldehyde groups,ketone groups,carboxyl groups,e-nol groups,esterification modification can introduce carboxyl groups,and grafting modification can introduce functional groups such as amino,amide and sulfonic acid groups.In order to improve the adsorption performance of cellulose,appropriate pretreatment methods and modification methods can be selected for cellulose according to the structure and adsorption substance requirements of cellulose.
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