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Shape Memory Cellulose-Based Photonic Reflectors.

Accepted version
Peer-reviewed

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Article

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Authors

Espinha, A 
Serrano, MC 
Frka-Petesic, Bruno  ORCID logo  https://orcid.org/0000-0001-5002-5685
Dumanli, AG 

Abstract

Biopolymer-based composites enable to combine different functionalities using renewable materials and cost-effective routes. Here we fabricate novel thermoresponsive photonic films combining cellulose nanocrystals (CNCs) with a polydiolcitrate elastomer exhibiting shape memory properties, known as hydroxyl-dominant poly(dodecanediol-co-citrate) (PDDC-HD). Iridescent films of CNCs are first made by evaporation-induced self-assembly, then embedded in the PDDC-HD prepolymer, and finally cured to obtain a cross-linked composite with shape memory properties. The fabricated samples are characterized by polarized optical microscopy, scanning electron microscopy, and thermomechanical cycling. The obtained hybrid material combines both intense structural coloration and shape memory effect. The association of stiff cellulose nanocrystals and soft polydiolcitrate elastomer enhances the overall mechanical properties (increased modulus and reduced brittleness). This hybrid nanocomposite takes advantage of two promising materials and expands their possibilities to cover a wide range of potential applications as multiresponsive devices and sensors. As they perform from room to body temperatures, they could be also good candidates for biomedical applications.

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Keywords

biomimetic, cellulose nanocrystals, cholesteric, polydiolcitrates, shape memory

Journal Title

ACS Appl Mater Interfaces

Conference Name

Journal ISSN

1944-8244
1944-8252

Volume Title

8

Publisher

American Chemical Society (ACS)
Sponsorship
Biotechnology and Biological Sciences Research Council (BB/K014617/1)
EPSRC (1525292)
Royal Society (IE140719)
European Research Council (639088)
EU FP7 NoE Nanophotonics4Energy Grant No. 248855, the Spanish MINECO project MAT2015-68075 (SIFE), and Comunidad de Madrid S2013/MIT-2740 (PHAMA_2.0) program. All the authors acknowledge the Royal Society (2014/R2-IE140719). A.E. was supported by the FPI PhD program from the MICINN. S.V., B.F.P., and A.G.P. are funded by the BBSRC David Phillips fellowship [BB/K014617/1] and the ERC-2014-STG H2020 639088. G.G. acknowledges the EPSRC [1525292]. M.C.S. acknowledges the Instituto de Salud Carlos III of Spain for a Miguel Servet I contract (MS13/00060).