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以N-甲基吗啉-N-氧化物水溶液(NMMO·H_2O)为溶剂,溶解棉浆粕制成棉浆粕/NMMO·H_2O溶液,在此溶液中加入一定量的二氧化钛(TiO_2),制得TiO_2/棉浆粕/NMMO·H_2O溶液;研究了TiO_2质量分数0~4.0%、棉浆粕质量分数5%~7%的TiO_2/棉浆粕/NMMO·H_2O溶液在80~100℃的流变性能。结果表明:少量TiO_2使棉浆粕/NMMO·H_2O溶液体系零剪切黏度(η0)增大,随着TiO_2含量增加,溶液的η0下降,TiO_2质量分数为4.0%时,溶液的η0低于未添加TiO_2的溶液的η0;TiO_2/棉浆粕/NMMO·H_2O溶液在80~100℃的非牛顿指数(n)小于1,溶液n随着TiO_2含量增加而增大,随着棉浆粕浓度增加而减小;溶液的黏流活化能(Eη)随着TiO_2含量增加先增大后减小,随着棉浆粕浓度增加而减小,在TiO_2质量分数为2.0%时,Eη较大。
A cotton pulp / NMMO · H_2O solution is prepared by dissolving the cotton pulp with N-methylmorpholine-N-oxide aqueous solution (NMMO · H_2O) as a solvent, adding a certain amount of titanium dioxide The TiO 2 / cotton pulp / NMMO · H 2 O solution was obtained. The effects of TiO 2 / cotton pulp / NMMO · H 2 O solution with TiO 2 mass fraction of 0-4.0% and cotton pulp mass fraction of 5-7% at 80-100 ℃ Variable performance. The results showed that the η0 of the cotton pulp / NMMO · H_2O solution increased with the addition of a small amount of TiO_2. With the increase of TiO_2 content, the η0 of the solution decreased. When the content of TiO_2 was 4.0%, the η0 of the solution was lower than that of the solution When the non-Newtonian index (n) of η0; TiO_2 / cotton pulp / NMMO · H_2O solution with addition of TiO_2 is less than 1 at 80 ~ 100 ℃, the solution n increases with the increase of TiO_2 content. With the increase of cotton pulp concentration (Eη) of the solution first increases and then decreases with the increase of TiO_2 content, and decreases with the increase of cotton pulp concentration. When the mass fraction of TiO_2 is 2.0%, Eη is larger .