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Silyl celluloses (SiC) were prepared by reacting cellulose with chloropropyltrichlorosilane (CPTCSi) andchloropropyltriethoxysilane (CPTESi) in LiCl/N,N-dimethylacetamide (DMAc). The Si content in the silyl cellulose could becontrolled by adjustment of the molar ratio of silane and cellulose. FT-IR spectra showed that cellulose was readily reactedwith the above two silane reagents, and the reactivity of CPTCSi is higher than that of CPTESi. It was presumed that thereaction process belongs to graft-polymerization. The results of differential thermal analysis (DTA) indicated that thethermostability of the materials produced increased with the increase of Si content in the sample. The acid resistance of thesamples SiC in 1 mol/L HCl aqueous solution was improved significantly. When Si content was ca. 20%, the silyl cellulosehas excellent thermostability, hydrophobicity, low density and stability in 1 mol/L HCl aqueous solution, owing tocrosslinking of cellulose chain with silane.
Silicone celluloses (SiC) were prepared by reacting cellulose with chloropropyltrichlorosilane (CPTCSi) and chloropropyltriethoxysilane (CPTESi) in LiCl / N, N-dimethylacetamide (DMAc). The Si content in the silyl cellulose could be controlled by adjustment of the molar ratio of silane and cellulose It was presumed that thereaction process belongs to graft-polymerization. The results of differential thermal analysis (DTA) indicated that thethermostability of the materials produced increased with the increase of Si content in the sample. The acid resistance of the samples SiC in 1 mol / L HCl aqueous solution was significantly significantly. When Si content was ca. 20%, the silyl cellulosehas excellent thermostability , hydrophobicity, low density and stability in 1 mol / L HCl aqueous solution, due tocrosslinking of cellulose chain with silane.