TY - JOUR
T1 - Photonic composite materials from cellulose nanorods and clay nanolayers
AU - Trindade, Ana C.
AU - Carreto, Miguel
AU - Helgesen, Geir
AU - Knudsen, Kenneth D.
AU - Puchtler, Florian
AU - Breu, Josef
AU - Fernandes, Susete
AU - Godinho, Maria Helena
AU - Fossum, Jon Otto
N1 - info:eu-repo/grantAgreement/FCT/5876/147333/PT#
POCI-01-0145-FEDER007688 (Reference UID/CTM/50025)
PTDC/FIS-NAN/0117/2014
PTDC/CTM-BIO/6178/2014
M-ERA-NET2/0007/2016 (CellColor)
PTDC/CTM-REF/30529/2017 (NanoCell2SEC).
{Nano2021 Program (250619 Graphene-NanoClay Systems).
PY - 2020/11
Y1 - 2020/11
N2 - Cellulose nano crystals (CNCs) are promising materials for energy efficient buildings related to the control of reflectivity and heat absorption/reflection of light. In this sense it is important to improve CNCs films fire retardant properties, which can be achieved by adding clays. Cellulose nanocrystals (CNCs) and nanolayers obtained from Sodium Fluorohectorite (NaFh) synthetic clay are both known to form liquid crystalline phases in aqueous suspensions. CNCs form cholesteric phases, which structure is preserved after water evaporation, while dry NaFh nanolayers aligned films collapse. In this initial work, it is shown that CNCs are compatible with NaFh clay. We demonstrate that the liquid crystalline phase of CNCs in water is not destroyed by the presence of NaFh nanolayers. The NaFh nanolayers act as planar anchoring surfaces to the cellulose nanorods and, after evaporation of the water coloured films are obtained. The precursor solutions and the photonic films were investigated by Describe several techniques.
AB - Cellulose nano crystals (CNCs) are promising materials for energy efficient buildings related to the control of reflectivity and heat absorption/reflection of light. In this sense it is important to improve CNCs films fire retardant properties, which can be achieved by adding clays. Cellulose nanocrystals (CNCs) and nanolayers obtained from Sodium Fluorohectorite (NaFh) synthetic clay are both known to form liquid crystalline phases in aqueous suspensions. CNCs form cholesteric phases, which structure is preserved after water evaporation, while dry NaFh nanolayers aligned films collapse. In this initial work, it is shown that CNCs are compatible with NaFh clay. We demonstrate that the liquid crystalline phase of CNCs in water is not destroyed by the presence of NaFh nanolayers. The NaFh nanolayers act as planar anchoring surfaces to the cellulose nanorods and, after evaporation of the water coloured films are obtained. The precursor solutions and the photonic films were investigated by Describe several techniques.
UR - http://www.scopus.com/inward/record.url?scp=85096011063&partnerID=8YFLogxK
U2 - 10.1140/epjst/e2020-000015-y
DO - 10.1140/epjst/e2020-000015-y
M3 - Article
AN - SCOPUS:85096011063
SN - 1951-6355
VL - 229
SP - 2741
EP - 2755
JO - European Physical Journal: Special Topics
JF - European Physical Journal: Special Topics
IS - 17-18
ER -