Unraveling the Effect of the Hydration Level on the Molecular Mobility of Nanolayered Polymeric Systems

被引：18

作者：

Borges, Joao ^{[1
,2
]}

Caridade, Sofia G. ^{[1
,2
]}

Silva, Joana M. ^{[1
,2
]}

Mano, Joao F. ^{[1
,2
]}

机构：

[1] Univ Minho, Headquarters European Inst Excellence Tissue Engn, Res Grp Biomat Biodegradables & Biomimet 3Bs, P-4806909 Caldas Das Taipas, Guimaraes, Portugal

[2] PT Govt Associate Lab, ICVS 3Bs, Braga, Portugal

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 2015年 / 36卷 / 04期

关键词：

glass transition; layer-by-layer multilayered systems; molecular mobility; nanolayer confinement; shape-memory polymers; GLASS-TRANSITION TEMPERATURE; BY-LAYER ASSEMBLIES; DYNAMIC-MECHANICAL ANALYSIS; CROSS-LINKING; VISCOELASTIC PROPERTIES; POLY(D; L-LACTIC ACID); POLY(L-LACTIC ACID); ALPHA-CYCLODEXTRIN; CHITOSAN MEMBRANES; FILLED POLYMERS;

D O I：

10.1002/marc.201400568

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 [高分子化学与物理];

摘要：

This work investigates the influence of the hydration level on the molecular mobility and glass transition dynamics of freestanding chitosan/alginate (CHT/ALG) nanolayered systems. Nonconventional dynamic mechanical analysis identifies two relaxation processes assigned to the -relaxation of the two biopolymers, respectively, CHT and ALG, when immersed in water/ethanol mixtures. This phenomenon explains the shape memory properties of the multilayered systems induced by hydration, thus constituting promising smart materials that would be of paramount importance in a plethora of research fields, including in the biomedical and biotechnological fields.

引用

页码：405 / 412

页数：8

共 70 条

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ON TEMPERATURE DEPENDENCE OF COOPERATIVE RELAXATION PROPERTIES IN GLASS-FORMING LIQUIDS [J].