私密直播全婐app免费大渔直播,国产av成人无码免费视频,男女同房做爰全过程高潮,国产精品自产拍在线观看

相關鏈接
聯系方式
  • 通信地址:北京市海淀區中關村北一街2號
  • 郵編:100190
  • 電話:010-82618573
  • 傳真:010-82618573
  • Email:rgliu@iccas.ac.cn
當前位置:> 首頁 > 論文著作 > 正文
Precipitation kinetics of cellulose in the Lyocell spinning process
作者:Liu, RG; Hu, XC
關鍵字:METHYLMORPHOLINE-N-OXIDE; SUPERMOLECULAR STRUCTURE; ORGANIC-SOLVENTS; FIBERS; FILMS; SPUN; MONOHYDRATE; MEMBRANES; SYSTEMS; WATER
論文來源:期刊
具體來源:Industrial & Engineering Chemistry Research 2006, 45(8), 2840-2844
發表時間:2006年

The average concentration of N-methylmorpholine-N-oxide (NMMO) in the running Lyocell filament was measured in the coagulation process by which the precipitation kinetics of cellulose in the Lyocell process was studied. It was found that there are two diffusion regimes in the coagulation process of cellulose in the Lyocell process. The fast regime is completed within 1 s, causing formation of hydrogen bonds between the molecules of NMMO and water. The apparent diffusion coefficients of NMMO in both the fast and slow regimes of the coagulation process of the Lyocell process were estimated by Fick's second law. It was found that apparent diffusion coefficients in both the fast and slow regimes decrease with increasing filament diameter and NMMO concentration in the coagulation bath. The apparent diffusion coefficient of NMMO in the fast regime is about one-tenth of that in the slow regime, which is in the range of 4-8 x 10(-7) cm(2)/s.

主站蜘蛛池模板: 定陶县| 夏河县| 娄底市| 繁峙县| 敖汉旗| 云和县| 思茅市| 赞皇县| 天津市| 河北省| 南城县| 温州市| 开封市| 平度市| 鹿邑县| 溧阳市| 原阳县| 蒙城县| 澳门| 巢湖市| 永善县| 瓦房店市| 乌鲁木齐市| 星子县| 兰溪市| 阜城县| 长寿区| 郓城县| 富裕县| 将乐县| 内江市| 镇沅| 桦甸市| 新疆| 兴隆县| 达州市| 宁晋县| 蕲春县| 富宁县| 饶阳县| 伊宁县|