Journal
NANOMATERIALS
Volume 11, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/nano11030658
Keywords
chitin nanofiber; deacetylated chitin; nanopaper; thermal diffusivity
Categories
Funding
- Japan Science and Technology Mirai Research and Development Program of the Japan Science and Technology Agency [JPMJMI17ED]
- Ogasawara Toshiaki Memorial Foundation, Konica Minolta Science and Technology Foundation
- Kurita Water and Environment Foundation
Ask authors/readers for more resources
The thermal conductivity properties of chitin nanofiber films were evaluated by changing the content of surface amino groups, with results showing that the difference in thermal conductivity depends on the amino group content on the fiber surfaces. The methodology for measuring thermal diffusivity under conditioned humidity could pave the way for more accurate analysis of thermal conductivity performance of hydrophilic materials.
Chitin, a natural polysaccharide polymer, forms highly crystalline nanofibers and is expected to have sophisticated engineering applications. In particular, for development of next-generation heat-transfer and heat-insulating materials, analysis of the thermal conductivity is important, but the thermal conductivity properties of chitin nanofiber materials have not been reported. The thermal conductivity properties of chitin nanofiber materials are difficult to elucidate without excluding the effect of adsorbed water and analyzing the influence of surface amino groups. In this study, we aimed to accurately evaluate the thermal conductivity properties of chitin nanofiber films by changing the content of surface amino groups and measuring the thermal diffusivity under dry conditions. Chitin and deacetylated-chitin nanofiber films with surface deacetylation of 5.8% and 25.1% showed in-plane thermal conductivity of 0.82 and 0.73 W/mK, respectively. Taking into account that the films had similar crystalline structures and almost the same moisture contents, the difference in the thermal conductivity was concluded to only depend on the amino group content on the fiber surfaces. Our methodology for measuring the thermal diffusivity under conditioned humidity will pave the way for more accurate analysis of the thermal conductivity performance of hydrophilic materials.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available