Investigation of surface properties of physico-chemically modified natural fibres using inverse gas chromatography

被引：66

作者：

Cordeiro, N. ^{[1
]}

Gouveia, C. ^{[1
]}

John, M. Jacob ^{[2
,3
]}

机构：

[1] Univ Madeira, Competence Ctr Exact Sci & Engn, P-9000390 Funchal, Portugal

[2] CSIR, Mat Sci & Mfg Polymers & Composites Competence Ar, ZA-6000 Port Elizabeth, South Africa

[3] Nelson Mandela Metropolitan Univ, Dept Text Sci, Fac Sci, ZA-6000 Port Elizabeth, South Africa

来源：

INDUSTRIAL CROPS AND PRODUCTS | 2011年 / 33卷 / 01期

关键词：

Natural fibres; Fibres modification; Alkaline treatment; Zein treatment; Inverse gas chromatography; Surface properties; CELLULOSE; ADSORPTION; PROTEIN; ENERGY; ZEIN;

D O I：

10.1016/j.indcrop.2010.09.008

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Inverse gas chromatography (IGC) is a suitable method to determine surface energy of natural fibres when compared to wetting techniques. In the present study, the surface properties of raw and modified lignocellulosic fibres have been investigated by IGC. The fibres chosen for the study were flax, hemp, kenaf, agave, agave hybrid, sisal and pineapple. The treatments used were 4% NaOH and 2% zein. The uniqueness of zein treatment is that it is bio-based and therefore maintains the biodegradable character of the natural fibres. Fourier transform infrared spectroscopy (FTIR) and environmental scanning electron microscope (ESEM) were also performed to characterize the surface changes in fibres. The surface properties of fibres are influenced by the chemical composition, crystallinity and morphology of the fibres. Bast fibres exhibited higher surface dispersive energy than leaf fibres. The raw fibres have a predominant basic character, whereas the alkaline treatment makes the fibres more acidic. Both alkaline and zein treatments decrease the dispersive surface energy and the specific free energy of adsorption. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：108 / 115

页数：8

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