at Google ScholarTitle data
Lauster, Tobias ; Mauel, Anika ; Herrmann, Kai ; Veitengruber, Viktoria ; Song, Qimeng ; Senker, Jürgen ; Retsch, Markus:
From Chitosan to Chitin : Bio-Inspired Thin Films for Passive Daytime Radiative Cooling.
In: Advanced Science.
Vol. 10
(2023)
Issue 11
.
- 2206616.
ISSN 2198-3844
DOI: https://doi.org/10.1002/advs.202206616
Abstract in another language
Passive radiative daytime cooling is an emerging technology contributing to carbon-neutral heat management. Optically engineered materials with distinct absorption and emission properties in the solar and mid-infrared range are at the heart of this technology. Owing to their low emissive power of about 100 W m(-2) during daytime, substantial areas need to be covered with passive cooling materials or coatings to achieve a sizeable effect on global warming. Consequently, biocompatible materials are urgently needed to develop suitable coatings with no adverse environmental impact. It is shown how chitosan films with different thicknesses can be produced from slightly acidic aqueous solutions. The conversion to their insoluble form chitin in the solid state is demonstrated and the conversion is monitored with infrared (IR) and NMR spectroscopy. In combination with a reflective backing material, the films show below-ambient temperature cooling capabilities with a suitable emissivity in the mid-IR region and low solar absorption of 3.1-6.9%, depending on the film thickness. This work highlights the potential of chitosan and chitin as widely available biocompatible polymers for passive radiative cooling applications.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Additional notes: | WOS:000936703600001 |
| Keywords: | absorption spectroscopy; broadband optical characterization; passive cooling; solid-state nuclear magnetic resonance spectroscopy; thermal emission |
| Institutions of the University: | Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry III > Chair Inorganic Chemistry III - Univ.-Prof. Dr. Jürgen Senker Research Institutions > Central research institutes > Nordbayerisches Zentrum für NMR-Spektroskopie - NMR-Zentrum |
| Result of work at the UBT: | Yes |
| DDC Subjects: | 500 Science 500 Science > 540 Chemistry |
| Date Deposited: | 05 Jun 2023 09:30 |
| Last Modified: | 05 Jun 2023 09:30 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/81132 |