Development of innovative bio-based treatments for wood modification with bio-polyesters

Abstract : Wood thermo-chemical modification process consists of permanent enhancement of wood properties in the core of the material. By decreasing wood equilibrium moisture content below the limit of fungi development, one could in addition reduce the dimensional variations due to humidity. A better dimensional stability of wood would be beneficial to durability of assemblies and surface coatings, further improving the performance of the material. Hydroxyl groups from wood polymers are responsible for the material hydrophilicity. The thermochemical modifications considered in this work mainly consist in limiting the access to these groups and / or reducing their number, by impregnation of bio-based monomers / oligomers (oligomers of lactic acid (OLA) or oligomers of butylene succinate (OBS)) followed by their in situ polymerisation by heat treatment. The hygroscopic behaviour of the material, the persistence of oligomers in the wood and the biological resistance of the treated wood are the criteria for the selection of treatments. The selected treatments lead to materials with enhanced dimensional stability and biological resistance. The potential applications of these materials have been evaluated after characterisation of mechanical properties, adhesion of the surface coatings and bonding capacity of the treated wood
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Theses
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http://docnum.univ-lorraine.fr/ulprive/DDOC_T_2018_0213_GROSSE.pdf
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https://hal.univ-lorraine.fr/tel-02096836
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Submitted on : Thursday, April 11, 2019 - 3:55:57 PM
Last modification on : Monday, September 23, 2019 - 1:54:02 PM

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  • HAL Id : tel-02096836, version 1

Citation

Charlotte Grosse. Development of innovative bio-based treatments for wood modification with bio-polyesters. Materials. Université de Lorraine, 2018. English. ⟨NNT : 2018LORR0213⟩. ⟨tel-02096836⟩

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