Functionally graded polyurethane/cellulose nanocrystal composites
Visualitza/Obre
Cita com:
hdl:2117/336255
Tipus de documentArticle
Data publicació2018-06
Condicions d'accésAccés obert
Llevat que s'hi indiqui el contrari, els
continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
:
Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
The preparation and investigation of functionally graded polymer nanocom-posites, which have a concentration gradient of cellulose nanocrystals (CNCs) along one direction, is reported here. As a test bed, a series of nanocompos-ites consisting of a thermoplastic polyurethane (PU) and 0–15% w/w CNCs is prepared via solvent casting and the mechanical properties of ¿lms of these materials are characterized by dynamic mechanical analyses and tensile tests. The formation of graded materials is accomplished by lamination of ¿lms with varying CNC content. The processing conditions are optimized to achieve intimate fusion of the individual layers. The elimination of internal interfaces is evidenced by an elongation at break of up to 500%. In order to explore potential applications of graded PU/CNC nanocomposites, structure-dependent actuation in response to water is demonstrated in a bioinspired architecture. In addition, the damping behavior of cylindrical shaped com-posites is investigated by way of compression tests. The results show that functionally graded PU/CNC composites show good damping behavior over a much larger range of forces than the neat PU or the homogeneous nanocomposites
CitacióNatterodt, J. [et al.]. Functionally graded polyurethane/cellulose nanocrystal composites. "Macromolecular materials and engineering", Juny 2018, vol. 303, núm. 6, p. 1700661/1-1700661/9.
ISSN1438-7492
Versió de l'editorhttps://onlinelibrary.wiley.com/doi/abs/10.1002/mame.201700661
Col·leccions
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
Natterodt Gradient Complete Manuscript_Revised.pdf | 813,6Kb | Visualitza/Obre |