Surface energetics of poly(N-vinyl-2-pyrrolidone)/chitosan blend films

被引：21

作者：

Caykara, Tuncer ^{[1
]}

Alaslan, Ali

Eroglu, Mehmet S.

Guven, Olgun

机构：

[1] Gazi Univ, Dept Chem, Fac Art & Sci, TR-06500 Ankara, Turkey

[2] Marmara Univ, Dept Chem Engn, TR-34722 Istanbul, Turkey

[3] Hacettepe Univ, Dept Chem, TR-06532 Ankara, Turkey

来源：

APPLIED SURFACE SCIENCE | 2006年 / 252卷 / 20期

关键词：

surface energy; contact angle; blends; chitosan;

D O I：

10.1016/j.apsusc.2005.08.092

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 [物理化学]; 081704 [应用化学];

摘要：

Poly(N-vinyl-2-pyrrolidone) (PVP) and chitosan (CTS) with three different molecular weights (MW: 150,000, 400,000 and 600,000 g/mol) blends were prepared as films having 13, 20, 33, 43 and 50 % (w/w) CTS by solution casting method. Surface properties of the films were analyzed by contact-angle measurements and scanning electron microscopy (SEM). The contact angles of water, glycerol, ethylene glycol, formamide and paraffin oil drop were measured on these films. The contact-angle results were evaluated in terms of surface free energy components by using Van Oss-Good methodology. It was found that all PVP/CTS blend surfaces are enriched in low surface free energy component, i.e. CTS. This conclusion was further confirmed by the cross-sectional SEM images observation of these blends. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：7430 / 7435

页数：6

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