期刊
INDUSTRIAL CROPS AND PRODUCTS
卷 92, 期 -, 页码 116-126出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.indcrop.2016.08.002
关键词
Tannin; Foams; Hydrophobisation; Water repellence; Water sorption; Thermal conductivity
资金
- French National Research Agency (ANR) as part of the Investissements d'Avenir program (Lab of Excellence ARBRE) [ANR-11-LABX-0002-01]
- CPER Structuration du Pole de Competitivite Fibres Grand'Est (Competitiveness Fibre Cluster)
- Conseil General des Vosges
- regional Region Lorraine
- national DRRT
- national FNADT
- European (FEDER) funds
Thermally insulating foams based on Mimosa bark extracts (Acacia Meansii) were hydrophobised with the aim of decreasing their sensitivity to moisture. Two different formulations leading to rigid foams presenting similar porosity were prepared, and were covalently grafted with three kinds of organosilanes. Non-treated and hydrophobised samples were all thoroughly characterised by FTIR spectroscopy, contact angle measurements and corresponding surface energy calculations, water sorption and thermal conductivity studies. Hydrophobisation produced a significant repellence towards liquid water but did not prevent water vapour sorption. Water uptake, however, was limited compared to the non-treated materials. As a result, the increase of thermal conductivity at high relative humidity was lower after hydrophobisation. (C) 2016 Elsevier B.V. All rights reserved.
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