Composés amphiphiles originaux à propiétés gélifiantes : synthèse et caractérisations physico-chimiques. Application à la formulation de produits de préservation du bois hydrosolubles

Abstract : Biomaterials hydrogel or organogel obtained from low molecular weight molecules give rise to an increasing interest both in terms on the fundamental and application domain. The work outlined here, aims to synthesize amphiphilic compounds with structural changes in order to establish relationships between the structure of these compounds and their gelling properties. We were asked to synthesize compounds (bimodular and trimodular) with and without cause polyoxyethylene type junction between the peptide and the hydrophobic unit. In a second step, other gelling amphiphilic molecules were prepared by substituting the polyoxyethylene pattern derived by an entity glycerol, allowing to obtain compounds from renewable sources but also to diversify the source of raw materials. The target compounds were obtained and their behavior in solution has been studied by different techniques (tensiometry, conductivity, infrared,...). Some of them, with gelling properties, associated with boron salts have been used to preserve the wood material (Scots pine). The tests proved conclusive in terms of reducing the leaching of boron as tests with Poria placenta (mushroom) grown on an agar medium or with Reticulitermes flavipes (termite) showed that wood treated with the association "borax-hydrogel" is protected even after leaching
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Firmin Obounou Akong. Composés amphiphiles originaux à propiétés gélifiantes : synthèse et caractérisations physico-chimiques. Application à la formulation de produits de préservation du bois hydrosolubles. Alimentation et Nutrition. Université de Lorraine, 2012. Français. ⟨NNT : 2012LORR0188⟩. ⟨tel-01749604⟩

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