Details

Autor(en) / Beteiligte

• Giese, Michael
• Blusch, Lina K.
• Khan, Mostofa K.
• Hamad, Wadood Y.
• MacLachlan, Mark J.

Titel

Responsive Mesoporous Photonic Cellulose Films by Supramolecular Cotemplating

Ist Teil von

• Angewandte Chemie (International ed.), 2014-08, Vol.53 (34), p.8880-8884

Auflage

International ed. in English

Ort / Verlag

Weinheim: WILEY-VCH Verlag

Erscheinungsjahr

2014

Quelle

MEDLINE

Beschreibungen/Notizen

• Cellulose‐based materials have been and continue to be exceptionally important for humankind. Considering the bioavailability and societal relevance of cellulose, turning this renewable resource into an active material is a vital step towards sustainability. Herein we report a new form of cellulose‐derived material that combines tunable photonic properties with a unique mesoporous structure resulting from a new supramolecular cotemplating method. A composite of cellulose nanocrystals and a urea–formaldehyde resin organizes into a chiral nematic assembly, which yields a chiral nematic mesoporous continuum of desulfated cellulose nanocrystals after alkaline treatment. The mesoporous photonic cellulose (MPC) films undergo rapid and reversible changes in color upon swelling, and can be used for pressure sensing. These new active mesoporous cellulosic materials have potential applications in biosensing, optics, functional membranes, chiral separation, and tissue engineering. Eye‐catching photonic origami: The invention of a supramolecular cotemplating method led to photonic cellulose material—an active form of “paper” with mesopores and dynamic structural colors. The high flexibility and rapid response upon swelling or pressing of these cellulose‐based materials (see picture) make them suitable for applications in pressure or polarity sensing as well as for optical filters.