Surface-active fluorocarbon end-functionalized polylactides

被引：22

作者：

Hutchings, Lian R. ^{[1
]}

Narrainen, Amilcar Pillay ^{[1
]}

Eggleston, Stuart M. ^{[1
]}

Clarke, Nigel ^{[1
]}

Thompson, Richard L. ^{[1
]}

机构：

[1] Univ Durham, Dept Chem, Durham DH1 3LE, England

来源：

POLYMER | 2006年 / 47卷 / 24期

关键词：

adsorption; surface modification; functionalized polymers;

D O I：

10.1016/j.polymer.2006.09.050

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The synthesis and surface properties of a 2 x C8F17 fluorocarbon di-functionalized poly(D,L-lactide), "F2PLA" are described. Small fractions similar to 5% w/w of F2PLA, when blended with unfunctionalized poly(D,L-lactide), "PLA", render the surface both hydrophobic and lipophobic. Contact angle analysis indicates that the properties of the blend surface approach those of PTFE. Rutherford backscattering analysis of the surface shows that at saturation, approximately 50% of the blend surface is covered by C8F17 fluorocarbon units. Using self-consistent field theory simulations, we estimate that adsorption of the F2PLA is characterized by a thermodynamic sticking energy of the difunctional group of approximately 6 k(B)T. Bilayer samples were prepared in which a blend of F2PLA in PLA was initially covered with a layer of pure PLA. The rate of surface modification in these films was analysed to obtain a diffusion coefficient of up to 160 nm(2)s(-1) for 21.6 kg/mol F2PLA at 90 degrees C. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：8116 / 8122

页数：7

共 32 条

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