What is the real value of chitosan's surface energy?

被引：80

作者：

Cunha, Ana G. ^{[1
]}

Fernandes, Susana C. M. ^{[1
]}

Freire, Carmen S. R. ^{[1
]}

Silvestre, Armando J. D. ^{[1
]}

Pascoal Neto, Carlos ^{[1
]}

Gandini, Alessandro ^{[1
]}

机构：

[1] Univ Aveiro, Dept Chem, CICECO, P-3810193 Aveiro, Portugal

来源：

BIOMACROMOLECULES | 2008年 / 9卷 / 02期

关键词：

D O I：

10.1021/bm701199g

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Because of conflicting reports and unrealistic literature values, a systematic study of the surface energy of chitin, chitosan, and their respective monomeric counterparts was carried out using contact angle measurements on films and pellets, before and after different purification procedures. All the commercial samples of these polymers were shown to contain nonpolar impurities that gave rise to enormous errors in the determination of the polar component of their surface energy. After their thorough removal, the value of the total surface energy (gamma(s)) and particularly of its polar component, increased considerably and reached the classical polysaccharide figures of gamma(d)(s) similar to 30 and gamma(p)(s) similar to 30 mJ/m(2). The characterization of the impurities by gas chromatography/mass spectrometry analysis indicated the presence of significant amounts of higher alkanes, fatty acids, and alcohols and sterols.

引用

页码：610 / 614

页数：5

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