ABSTRACT
With the gradual reduction of nonrenewable resources and increasing demand for structural materials, non-oil commodities, catalysts, and photoelectric devices, natural renewable resources draws the world’s attention. Among them, cellulose (a linear polysaccharide of β (1 → 4) linked d-glucose) as one of the most abundant biomacromolecules in nature1 has drawn much attention in recent years with its renewability, biocompatibility, nontoxicity, and availability.2,3 As the major ingredient of plant cell walls, cellulose has been widely used in the traditional industries of food, medicine, transport, and architecture with is popular price. In order to fully exploit the potential functions of celluloses, much work about the multifunction of cellulose is under way. At present, the major modication methods about cellulose include derivatization, graft copolymerization, cross-linking, and alloying.4 Among them, graft copolymers based on cellulose and cellulose derivatives have been obtained via various conventional polymerization techniques and exhibit unique properties.5,6 Wettability, adhesion, and dyeability of the cellulose ber could be improved by grafting hydrophilic monomer, while grafting cellulose derivatives with low wettability to oil contamination could be obtained by grafting hydrophobic monomer.7,8
Nowadays, researches on cellulose mainly focus on two aspects. One is nding a suitable and green solvent system for cellulose, which is insoluble in most solvents because of the hydrogen bonding between macromolecules.1 Thereinto, N-methylmorpholine-N-oxide/water, triuoroacetic acid/chloralkane, liquid ammonium thiocyanate, urea/sodium hydroxide,9-11 and ionic liquid (IL)12-14 are good solvent systems for cellulose. The other one is the functional modication of
4.1 Introduction ............................................................................................................................65 4.2 Graft Copolymerization of Cellulose .....................................................................................66
