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、机械上非常抵抗和不透水的包装的知识。目标市场是用无人机空运消费品。目前的标准包装，因为他们的重量，他们缺乏刚性和耐水性，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，干燥时得到的结构轻而刚性。这个项目的创意是用这些泡沫创造一个包装结构；现在已经不存在了。这些都是非常创新的产品，但也面临着一些挑战。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。在第一步，我们的目标是在干燥状态下保持湿泡沫的最大性能。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的纯机械方法，另一种是通过对泡沫的结构元素（纤维素细丝）进行化学改性。第二步，我们的目标是使表面疏水。我们建议使用表面脂肪酸接枝的手段，温和修改现有的技术（染色质）。这种改性之所以成为可能，是因为纤维素细丝比普通的纸浆纤维具有更多的活性位点（OH）。在第三步中，我们将创建多层结构，由纤维素长丝泡沫芯和经色谱处理的表层组成。本项目培养博士生3名，硕士生2名，博士后2名。在项目期间开发的知识将允许开发一系列适应新的无人机交付市场条件的新包装产品。

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.