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Celluloses in an ionic liquid: the rheological properties of the solutions spanning the dilute and semidilute regimes
Kuang, Qing-Lin1,2; Zhao, Jun-Chai1; Niu, Yan-Hua1; Zhang, Jun1; Wang, Zhi-Gang1
2008-08-21
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY B
ISSN1520-6106
Volume112Issue:33Pages:10234-10240
AbstractThe ionic liquid of 1-allyl-3-methylimidazolium chloride ([amim]Cl) was used as the good solvent to dissolve celluloses. Cellulose concentration covers the range of 0.1-3.0 wt %, spanning both the dilute and semidilute regimes. The theological properties of the cellulose ionic liquid solutions have been investigated by steady shear and oscillatory shear measurements in this study. In the steady shear measurements, all the cellulose solutions show a shear thinning behavior at high shear rates; however, the dilute cellulose solutions show another shear thinning region at low shear rates, which may reflect the characteristics of the [amim]Cl solvent. In the oscillatory shear measurements, for the dilute regime, the reduced dimensionless moduli are obtained by extrapolation of the viscoelastic measurements for the dilute solutions to infinite dilution. The frequency dependences of the reduced dimensionless moduli are intermediate between the predictions from the Zimm model and elongated rodlike model theories, while the fitting by using a hybrid model combining these two model theories agrees well with the experimental results. For the semidilute regime, the frequency dependences of moduli change from the Zimm-like behavior to the Rouse-like behavior with increasing cellulose concentration. In the studied concentration range, the effects of molecular weight and temperature on solution viscoelasticities and the relationship between steady shear viscosity and dynamic shear viscosity are presented. Results show that the solution viscoelasticity greatly depends on the molecular weight of cellulose; the empirical time-temperature superposition principle holds true at the experimental temperatures, while the Cox-Merz rule fails for the solutions investigated in this study.
DOI10.1021/jp804167n
Indexed BySCI
Language英语
WOS IDWOS:000258460400024
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:100[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/63382
Collection中国科学院化学研究所
Corresponding AuthorWang, Zhi-Gang
Affiliation1.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, CAS Key Lab Engn Plast, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Kuang, Qing-Lin,Zhao, Jun-Chai,Niu, Yan-Hua,et al. Celluloses in an ionic liquid: the rheological properties of the solutions spanning the dilute and semidilute regimes[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2008,112(33):10234-10240.
APA Kuang, Qing-Lin,Zhao, Jun-Chai,Niu, Yan-Hua,Zhang, Jun,&Wang, Zhi-Gang.(2008).Celluloses in an ionic liquid: the rheological properties of the solutions spanning the dilute and semidilute regimes.JOURNAL OF PHYSICAL CHEMISTRY B,112(33),10234-10240.
MLA Kuang, Qing-Lin,et al."Celluloses in an ionic liquid: the rheological properties of the solutions spanning the dilute and semidilute regimes".JOURNAL OF PHYSICAL CHEMISTRY B 112.33(2008):10234-10240.
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