CONTROLLED POROSITY STRUCTURAL MATERIAL WITH NANOCELLULOSE FIBERS

The present invention provides， inter alia， biocompatible porous structural materials made exclusively or almost exclusively from nanocellulose fibers (CNF)， CNC， or bacterial cellulose， as well as processes for making and using provided compositions. Provided compositions may possess specifically tailored mechanical strength properties and have a design-controlled porosity that is homogeneous or graded， depending on the application. Provided compositions may be manufactured by the controlled dewatering of suspensions of CNF. In some embodiments， provided compositions may include a solids concentration of about 10% to about 95% by weight. Controlled water removal and pore homo- or heterogeneity may be accomplished by controlling capillary， hydrostatic and evaporative processes in the environment of a porous mold around the CNF slurry. A freeze drying or vacuum drying step may be used to complete the drying process， locking in the porous network structure resulting in a predetermined porosity (pore volume/total volume)， and pore size distribution. The present invention provides， inter alia， biocompatible porous structural materials made exclusively or almost exclusively from nanocellulose fibers (CNF)， CNC， or bacterial cellulose， as well as processes for making and using provided compositions. Provided compositions may possess specifically tailored mechanical strength properties and have a design-controlled porosity that is homogeneous or graded， depending on the application. Provided compositions may be manufactured by the controlled dewatering of suspensions of CNF. In some embodiments， provided compositions may include a solids concentration of about 10% to about 95% by weight. Controlled water removal and pore homo- or heterogeneity may be accomplished by controlling capillary， hydrostatic and evaporative processes in the environment of a porous mold around the CNF slurry. A freeze drying or vacuum drying step may be used to complete the drying process， locking in the porous network structure resulting in a predetermined porosity (pore volume/total volume)， and pore size distribution.

搜集汇总

背景与挑战

背景概述

该数据集涉及一种基于纳米纤维素纤维（如CNF、CNC或细菌纤维素）的生物相容性多孔结构材料。其特点是具有可定制的机械强度和通过设计控制的均匀或梯度孔隙结构。材料的制造主要通过控制纳米纤维素悬浮液的脱水过程实现，包括利用毛细管、静水压和蒸发等机制，并可能结合冷冻干燥或真空干燥步骤来固定孔隙网络。