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| 纤维素/NMMO·H_2O溶液体系流变性能的研究 | |
| 引用本文： | 吴翠玲,李新平,秦胜利,王建勇.纤维素/NMMO·H_2O溶液体系流变性能的研究[J].纤维素科学与技术,2005,13(1):34-38. |
| 作者姓名： | 吴翠玲 李新平 秦胜利 王建勇 |
| 作者单位： | 1. 陕西科技大学,陕西省造纸技术及特种纸品开发重点实验室,陕西,咸阳,712081;兰州理工大学,机电工程学院,甘肃,兰州,730050 2. 陕西科技大学,陕西省造纸技术及特种纸品开发重点实验室,陕西,咸阳,712081 3. 广东轻工职业技术学院,广东,广州,510300 4. 兰州理工大学,机电工程学院,甘肃,兰州,730050 |
| 基金项目： | 广东省科技计划项目(2003C103016)、华南理工大学制浆造纸工程国家重点实验室研究基金(0210)和陕西省教育厅省级重点实验室2001年重点科研项目资助课题 |
| 摘 要： | 利用 Brookfield DV-Ⅱ型粘度计对纤维素/NMMO·H2O 溶液体系的流变性能进行了研究,讨论了温度、纤维素浓度、浆粕聚合度及添加剂等对溶液粘度的影响。结果表明,纤维素/NMMO·H2O 溶液的流动活化能较低,因此其表观粘度随温度的变化不大;纤维素浓度和浆粕聚合度的增加都可使溶液粘度增大,但纤维素浓度对溶液粘度的影响更显著;抗氧化剂没食子酸丙酯(GPE)的加入减缓了加热时溶液粘度的下降,降低了纤维素的氧化降解;二甲亚砜(DMSO)的加入可有效地控制溶液粘度,改善溶液的加工性能。 |
| 关 键 词： | 纤维素 N-甲基吗啉-N-氧化物(NMMO) 流变性能 |
| 文章编号： | 1004-8405(2005)01-0034-05 |
| 修稿时间： | 2004年10月9日 |
Study on the Rheological Behavior of Cellulose/Monohydrate of N-methylmorpholine-N-oxide Solutions |
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| WU Cui-ling,LI Xin-ping,QIN Sheng-li,WANG Jian-yong.Study on the Rheological Behavior of Cellulose/Monohydrate of N-methylmorpholine-N-oxide Solutions[J].Journal of Cellulose Science and Technology,2005,13(1):34-38. | |
| Authors: | WU Cui-ling LI Xin-ping QIN Sheng-li WANG Jian-yong |
| Affiliation: | WU Cui-ling1,2,LI Xin-ping1,QIN Sheng-li3,WANG Jian-yong2 |
| Abstract: | The rheological properties of cellulose solution in N-methylmorpholine-N-oxide monohydrate were investigated by Brookfield DV-Ⅱ viscometer. The dependence of the shear viscosity on temperature, cellulose content, average degree of polymerization (DP) and addictives were discussed. The results showed that the cellulose solution had lower flow-activation energy, so its viscosity was less sensitive to variation of temperature. Both solutions exhibited increase in viscosity with increasing concentration and DP of cellulose. But the concentration had a significant effect on the viscosity of the solutions. As an antioxidant, GPE (gallic acid propyl ester) slowed down the decrease in viscosity of NMMO-cellulose-solution when heated and prevented oxidative degradation of cellulose. The addition of DMSO (dimethyl sulfoxide) could control the viscosity and improve the processing property of the solutions. |
| Keywords: | cellulose N-methylmorpholine-N-oxide (NMMO) rheological behavior |
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