Université de Lyon, F-69631, Lyon; INSA Lyon, F-69621, UMR CNRS 5223, Ingénierie des Matériaux Polymères F-69621, Villeurbanne, France; Centre Technique du Papier, Domaine Universitaire, CS 90251, 38044, Grenoble Cedex 9, France.
Université de Lyon, F-69631, Lyon; INSA Lyon, F-69621, UMR CNRS 5223, Ingénierie des Matériaux Polymères F-69621, Villeurbanne, France.
Carbohydr Polym. 2018 Aug 1;193:353-361. doi: 10.1016/j.carbpol.2018.04.009. Epub 2018 Apr 3.
Herein, we report on the preparation of novel cellulose-PEG biohybrid papers with wet strength properties. The biohybrid paper sheets are obtained using a two-step procedure where ω- or α, ω-azide functionalized PEG chains are anchored onto alkyne-functionalized wood fibers through CuAAC ligation in mild and aqueous conditions. The incorporation of the PEG grafts mostly occurs at the periphery of the cellulose fibers and degrees of substitution up to 0.028 are obtained. The presence of PEG grafts significantly increases the tensile, burst and tear strength properties in the wet state, the reinforcement being more pronounced for fibers grafted with α,ω-azide PEG. This reinforcement is consistent with a relatively sparse hetero-crosslink reaction creating inter-fiber covalent bonds and forming a cellulose network within the cell wall.
在此，我们报告了具有湿强度性能的新型纤维素-PEG 生物杂化纸的制备。生物杂化纸是通过两步法获得的，其中 ω-或 α,ω-叠氮功能化的 PEG 链通过 CuAAC 键合在温和的水性条件下连接到炔基功能化的木纤维上。PEG 接枝主要发生在纤维素纤维的外围，取代度高达 0.028。PEG 接枝的存在显著提高了湿态下的拉伸、破裂和撕裂强度，对于用 α,ω-叠氮 PEG 接枝的纤维，增强效果更为明显。这种增强与相对稀疏的杂交叉反应一致，该反应在纤维间形成共价键，并在细胞壁内形成纤维素网络。
