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Theses

Élaboration de revêtements transparents à base de clusters de métaux de transition pour le blocage des rayonnements proche-infrarouge

Abstract : The antagonism between growing global energy needs and the obligation to slow the global warming is one of the challenges humanity faces. In order to ensure sufficient thermal comfort, the housing, automotive or agricultural buildings sectors are major energy consumers. To reduce these needs, one of the proposed solutions aims to improve the thermal insulation of these buildings through the use of innovative materials. One of the major objectives is to improve the insulation of the windows which represent a significant part of the energy losses. The research described in this thesis has made it possible to develop transparent materials for visible solar radiation while being effective shields against ultraviolet and near-infrared radiation. Such materials are the result of the combination between transition metal cluster patterns having desired absorption properties and a host matrix for shaping these materials (processability). The syntheses as well as the methodology for modulating the absorption and integration properties of clusters in different sol-gel or polymer matrices are presented. Of particular interest is the relationship between the structure of cluster pattern and their absorption properties through comparisons between experimental studies and quantum chemistry studies using density functional theory (DFT). In fine, the increase in the level of understanding of the structure-absorption properties of the clusters studied will make it possible to consider the study of new compositions for even more efficient materials in the future for solar control.
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Maxence Wilmet. Élaboration de revêtements transparents à base de clusters de métaux de transition pour le blocage des rayonnements proche-infrarouge. Polymères. Université Rennes 1, 2018. Français. ⟨NNT : 2018REN1S108⟩. ⟨tel-02454962⟩

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