Emballages résistants, hydrophobes et légers et à base de mousse de filaments de cellulose (FC).

该项目旨在开发制造超轻、机械强度高和不透水包装的知识。目标市场是通过无人机进行消费品的空中交付。目前的标准包装，由于其重量，缺乏刚性和防水性，不适应这个不断增长的市场。纳米纤维素研究和/或纤维素长丝的最新进展表明，基于这些新纤维制造泡沫是可能的。由于这些泡沫的充气结构，当干燥时获得的结构是轻的和刚性的。该项目的创意是用这些泡沫创造一个包装结构;现在还不存在。这些都是非常创新的产品，有几个挑战。该项目有三个技术和科学挑战，解决这些挑战是拟议工作的主要目标。第一步，我们的目标是在干燥状态下保持湿泡沫的最大特性。我们提出了两种方法，一种是在泡沫形成和在造纸机上干燥过程中的纯机械方法，另一种是通过对泡沫的结构元素（纤维素长丝）进行化学改性。我们建议通过对现有技术（色谱法）进行温和改性来使用表面脂肪酸接枝。这种改性是由于纤维素长丝比普通纸浆纤维具有更多的活性位点（OH）。在第三步中，我们将创建由纤维素长丝泡沫芯和经色谱处理的表面层组成的多层结构。该项目涉及培养3名博士生、2名硕士生和2名博士后。在项目期间开发的知识将允许开发一系列新的包装产品，以适应新的无人机交付市场条件。

The project aims to develop the knowledge to manufacture ultra-light, mechanically very resistant and impervious packaging. The target market is the aerial delivery of consumer goods by drones. The current standard packaging, because of their weight, their lack of rigidity and water resistance, are not adapted to this growing market. The latest advances in nanocellulose research and/or cellulose filaments have demonstrated that it is possible to create foams based on these new fibers. Because of the aerated structure of these foams, the structure obtained when dried is light and rigid. The originality of the project is to create a packaging structure from these foams; which does not exist now. These are very innovative products with several challenges. The project has three technical and scientific challenges, the solution of which is the main objective of the proposed work.In a first step, we aim to preserve the maximum properties of wet foams in the dry state. We propose two approaches, one purely mechanical during the formation of the foam and its drying on paper machine and the other by chemical modification of the structural elements of the foam (cellulose filaments).In a second step, we aim to make the surface hydrophobic. We propose to use surface fatty acid grafting by means of a mild modification of an existing technology (Chromatogeny). This modification is made possible by the fact that the cellulose filaments have more active sites (OH) than a normal fiber of pulp.In a third step, we will create multilayer structures consisting of a cellulose filament foam core and a surface layer treated by chromatography. The project involves the training of 3 doctoral students, 2 master's students and two post-doctoral students. The knowledge developed during the project will allow the development of a new range of packaging products adapted to the new drone delivery market conditions.