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题名: Extensional rheology of cellulose/NaOH/urea/H2O solutions
作者: Lu, Fei1; Zhang, Chao1; Kang, Hongliang1; Huang, Yong1, 2; Liu, Ruigang1
关键词: Cellulose ; Solution ; NaOH/urea/H2O ; Extensional rheology
刊名: CELLULOSE
发表日期: 2016-10-01
卷: 23, 期:5, 页:2877-2885
收录类别: SCI
英文摘要: The extensional flow behaviors of cellulose/NaOH/urea/H2O solution were investigated by using capillary breakup extensional rheometry (CaBER). The effects of temperature, storage time and cellulose concentrations on both the storage modulus G' and the loss modulus GaEuro(3) were also analyzed. For 2 wt% cellulose solution, the G', GaEuro(3) and filament lifetime remained unchanged after long storage time. While, for 4 wt% cellulose solution, physical gels could form at either higher temperature or for longer storage time, and the filament lifetime, the relaxation time (lambda (e) ) and the initial extensional viscosity (eta (e0)) first increased and then decreased with increase of the storage time. The transition points of the filament lifetime shifted to lower storage time with the increase of the temperature. The eta (e0) is proportional to lambda (e) . The results presented suggest that the extensional properties of the cellulose/NaOH/urea/H2O solution first increase and then decrease during the gelation process, and the spinning time, which decreases linearly with the increase in the storage temperature, must be controlled below the time that eta (e0) starts to decrease.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35357
Appears in Collections:工程塑料实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Tech Inst Phys & Chem, Natl Res Ctr Engn Plast, Beijing 100190, Peoples R China
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