Reduction of water wettability of nanofibrillated cellulose by adsorption of cationic surfactants

被引：91

作者：

Xhanari, Klodian ^{[2
]}

Syverud, Kristin ^{[1
]}

Chinga-Carrasco, Gary ^{[1
]}

Paso, Kristofer ^{[2
]}

Stenius, Per ^{[2
,3
]}

机构：

[1] Paper & Fibre Res Inst, N-7491 Trondheim, Norway

[2] Norwegian Univ Sci & Technol, Ugelstad Lab, Dept Chem Engn, N-7491 Trondheim, Norway

[3] PS Interfaces, S-18432 Akersberga, Sweden

来源：

CELLULOSE | 2011年 / 18卷 / 02期

关键词：

Nanofibrillated cellulose; MFC; Adsorption; Cationic surfactants; Admicelles; Contact angles; Wetting; MICROFIBRILLATED CELLULOSE; ORGANIC-COMPOUNDS; TRANSPARENT; PULP; ADSOLUBILIZATION; SUSPENSIONS; COMPOSITES; OXIDATION; WHISKERS; FIBERS;

D O I：

10.1007/s10570-010-9482-y

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：

Adsorption isotherms of single and double chain cationic surfactants with different chain length (cetyltrimethyl-, didodecyl- and dihexadecyl ammonium bromide) onto cellulose nanofibrils were determined. Nanofibrillated cellulose, also known as microfibrillated cellulose (MFC), with varying contents of carboxyl groups (different surface charge) was prepared by TEMPO-mediated oxidation followed by mechanical fibrillation. The fibril charge was characterized by potentiometric and conductometric titration. Surfactant adsorption was verified by Fourier Transform Infrared Spectroscopy (FTIR) and X-ray Photoelectron Spectroscopy (XPS). Wetting and adhesion of water onto fibril films was determined by contact angle measurements. Small aggregates (admicelles) of surfactant were shown to form on the nanofibril surfaces, well below critical micelle concentrations. The results demonstrate the possibility of using cationic surfactants to systematically control the degree of water wettability of cellulose nanofibrils.

引用

页码：257 / 270

页数：14

共 38 条

[21] Novel high-strength biocomposites based on microfibrillated cellulose having nano-order-unit web-like network structure [J].