Author:
Apostolopoulou-Kalkavoura Varvara,Munier Pierre,Dlugozima Lukasz,Heuthe Veit-Lorenz,Bergström Lennart
Abstract
AbstractAnisotropic cellulose nanocrystal (CNC) foams with densities between 25 and 130 kg m−3 (CNC25 –CNC130) were prepared by directional ice-templating of aqueous dispersions. Estimates of the solid and gas conduction contributions to the thermal conductivity of the foams using a parallel resistor model showed that the relatively small increase of the radial thermal conductivity with increasing foam density can be attributed to interfacial phonon scattering. The foam wall nanoporosity and, to a lesser extent, the orientation of the CNC particles and alignment of the columnar macropores, also influence the insulation performance of the foams. The insight on the importance of phonon scattering for the thermal insulation properties of nanocellulose foams provides useful guidelines for tailoring nanofibrillar foams for super-insulating applications.
Funder
Svenska Forskningsrådet Formas
Wallenberg Wood Science Center
Stockholm University
Publisher
Springer Science and Business Media LLC
Reference45 articles.
1. Budtova, T. Bio-based aerogels : A new generation of thermal superinsulating materials. in Cellulose science and technology: Chemistry, analysis and applications (eds. Rosenau, T., Potthast, A. & Hell, J.) 371–392 (Wiley, 2019). https://doi.org/10.1002/9781119217619.ch15
2. Duong, H. M. & Nguyen, S. T. Nanocellulose aerogels as thermal insulation materials. in Nano and biotech based materials for energy building efficiency (eds. Pacheco Torgal, F., Buratti, C., Kalaiselvam, S., Granqvist, C. & Ivanov, V.) 411–427 (Springer, Cham, 2016). https://doi.org/10.1007/978-3-319-27505-5_15
3. Lavoine, N. & Bergström, L. Nanocellulose-based foams and aerogels: Processing, properties, and applications. J. Mater. Chem. A 5, 16105 (2017).
4. Federation of European Rigid Polyurethane Foam Association. Thermal insulation materials made of rigid polyurethane foam (PUR/PIR). (2006).
5. Winterling, H. & Sonntag, N. Rigid polystyrene foam (EPS, XPS). Kunststoffe International 101 (2011).
Cited by
6 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献