Journal
ACS Applied Materials & Interfaces
Volume 8, Issue 46, Pages 31935-31940Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b10611
Keywords
cellulose nanocrystals; cholesteric; polydiolcitrates; shape memory; biomimetic
Funding
- EU FP7 NoE Nanophotonics4Energy [248855]
- Spanish MINECO [MAT2015-68075]
- Comunidad de Madrid [S2013/MIT-2740]
- MICINN
- BBSRC [BB/K014617/1]
- Instituto de Salud Carlos III of Spain [MS13/00060]
- [ERC-2014-STG H2020 639088]
- Biotechnology and Biological Sciences Research Council [BB/K014617/1] Funding Source: researchfish
- Engineering and Physical Sciences Research Council [1525292] Funding Source: researchfish
- BBSRC [BB/K014617/1] Funding Source: UKRI
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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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