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Título

Humidity-Activated Shape Memory Effects on Thermoplastic Starch/EVA Blends and Their Compatibilized Nanocomposites

AutorSessini, Valentina; Raquez, Jean-Marie; Lourdin, D.; Maigret, J. E.; Kenny, José María ; Dubois, Philippe; Peponi, Laura
Palabras claveTPS
Shape memory
Blends
Humidity-mechanical cycles
EVA
Compatibilizer effect
Fecha de publicación2017
EditorJohn Wiley & Sons
CitaciónMacromolecular Chemistry and Physics 218 (2017)
ResumenIn this work, a systematic study on the humidity-activated shape memory properties of dual-responsive shape memory bionanocomposites with both humidity- and thermally-activated shape memory effects is reported. The study is performed through humidity-mechanical cycles in an Instron machine with a temperature chamber equipped with an ultrasonic humidity generator. In particular, the bionanocomposites studied are based on blends of ethylene–vinyl acetate (EVA) and thermoplastic starch reinforced with natural bentonite. In our previous work, thermomechanical cycles are performed by using EVA-induced crystallization and a preliminary humidity-activated shape memory test is designed. Herein, the shape memory results of both blends and their nanocomposites reflect the very good ability to humidity-activated recover of the initial shape with values higher than 80%. Moreover, the ability to fix the temporary shape of this systems is very good, especially when nanofillers are added. The compatibilizer effect of natural bentonite is demonstrated by means of different techniques such as scanning emission microscopy and mapping by confocal Raman spectroscopy.
Versión del editorhttp://dx.doi.org/10.1002/macp.201700388
URIhttp://hdl.handle.net/10261/163849
Identificadoresdoi: 10.1002/macp.201700388
issn: 1022-1352
e-issn: 1521-3935
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