Rheological characterization of CNC-CTAB network below and above critical micelle concentration (CMC)

被引：54

作者：

Gahrooee, Tina Raeisi ^{[1
]}

Moud, Aref Abbasi ^{[1
]}

Danesh, Marziyeh ^{[1
]}

Hatzikiriakos, Savvas G. ^{[1
]}

机构：

[1] Univ British Columbia, Dept Chem & Biol Engn, Vancouver, BC V6T 1Z3, Canada

来源：

CARBOHYDRATE POLYMERS | 2021年 / 257卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Cellulose nanocrystals; Rheology; Sodium dodecyl sulfate; Cetyltrimethylammonium bromide; Micelle charge; Hydrogel; Thixotropic gel;

D O I：

10.1016/j.carbpol.2020.117552

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The network of Cellulose Nanocrystal (CNC) suspension is explored below and above the critical micelle concentration (CMC), in the presence of cetyltrimethylammonium bromide (CTAB) with a positively charged head using TEM imaging and rheological characterization. CNC-CTAB gels show shear thinning behavior, complex relationship between strain amplitudes and CTAB concentration, diminishing thixotropic behavior as a function of CTAB and single and two yielding stress maxima as a function of CTAB, resulting from different microstructure below and above the critical Micelle Concentration (CMC) of CTAB. Comparing the flow curves of CNC-CTAB suspension/gel revealed the role played by CTAB content, CNC concentration and sonication energy in strengthening of the network. We analyzed and obtained yield stress from steady shear, creep testing and oscillatory experiments and compared them.

引用

页数：13

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