Rheological properties of microfibrillar suspension of TEMPO-oxidized pulp

被引：297

作者：

Lasseuguette, Elsa ^{[1
]}

Roux, Denis ^{[2
]}

Nishiyama, Yoshiharu ^{[1
]}

机构：

[1] UJF, CNRS, Ctr Rech Macromol Vegetales, ICMG, F-38041 Grenoble 9, France

[2] UJF, CNRS, INPG, Lab Rheol, F-38041 Grenoble 9, France

来源：

CELLULOSE | 2008年 / 15卷 / 03期

关键词：

cellulose microfibrils; TEMPO oxidation; rheology;

D O I：

10.1007/s10570-007-9184-2

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

0805 ; 080502 ; 0822 ;

摘要：

The rheology of cellulose microfibril suspensions from TEMPO-oxidized pulp was investigated. The suspension showed a pseudo-plastic and thixotropic behavior, slowly evolving with time under a given shear rate. The viscosity was proportional to the concentration up to the critical concentration of 0.23%. Above it, the viscosity followed a power law with exponents from 2 to 6 depending on the shear rate, and the system showed shear thinning behavior and behaved gel-like. Below this concentration, the system was more Newtonian. Birefringence measurement of 0.44% and 0.78% suspension showed that microfibrils alignment saturated at a small shear rate with a Herman's orientation parameter below 0.65 probably due to the interconnection of microfibrils.

引用

页码：425 / 433

页数：9

共 22 条

[1]

[Anonymous], 1982, J APPL POLYM SCI

[2] Cellulosic hydrocolloid system present in seed of plants [J].

Azuma, J ;

Sakamoto, M .

TRENDS IN GLYCOSCIENCE AND GLYCOTECHNOLOGY, 2003, 15 (81) :1-14

[3] Thixotropy - A review [J].

Barnes, HA .

JOURNAL OF NON-NEWTONIAN FLUID MECHANICS, 1997, 70 (1-2) :1-33

[4] Shear Dynamics of Aqueous Suspensions of Cellulose Whiskers [J].

Bercea, M ;

Navard, P .

MACROMOLECULES, 2000, 33 (16) :6011-6016

[5] Suspensions of cellulose microfibrils from sugar beet pulp [J].

Dinand, E ;

Chanzy, H ;

Vignon, MR .

FOOD HYDROCOLLOIDS, 1999, 13 (03) :275-283

[6] Parenchymal cell cellulose from sugar beet pulp: Preparation and properties [J].

Dinand, E ;

Chanzy, H ;

Vignon, MR .

CELLULOSE, 1996, 3 (03) :183-188

[7]

DOI M, 1986, THEORY POLYM DYNAMIC, P218

[8]

Fuller G. G., 1995, Optical Rheometry of Complex Fluids

[9]

HIOKI N, 1995, JPN TAPPI J, V49, P82

[10] BIREFRINGENCE OF NATIVE CELLULOSIC FIBERS .I. UNTREATED COTTON AND RAMIE [J].

IYER, KRK ;

NEELAKANTAN, P ;

RADHAKRISHNAN, T .

JOURNAL OF POLYMER SCIENCE PART A-2-POLYMER PHYSICS, 1968, 6 (10PA) :1747-+

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