Oliaei Erfan, Lindström Tom, Berglund Lars A
Wallenberg Wood Science Center, Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
Material and Surface Design Department, Bioeconomy and Health Division, RISE Research Institutes of Sweden, SE-114 86 Stockholm, Sweden.
Polymers (Basel). 2021 Aug 16;13(16):2747. doi: 10.3390/polym13162747.
Low-porosity materials based on hot-pressed wood fibers or nanocellulose fibrils (no polymer matrix) represent a new concept for eco-friendly materials with interesting mechanical properties. For the replacement of fossil-based materials, physical properties of wood fiber materials need to be improved. In addition, the carbon footprint and cumulative energy required to produce the material also needs to be reduced compared with fossil-based composites, e.g., glass fiber composites. Lignin-containing fibers and nanofibers are of high yield and special interest for development of more sustainable materials technologies. The present mini-review provides a short analysis of the potential. Different extraction routes of lignin-containing wood fibers are discussed, different processing methods, and the properties of resulting fiber materials. Comparisons are made with analogous lignin-containing nanofiber materials, where mechanical properties and eco-indicators are emphasized. Higher lignin content may promote eco-friendly attributes and improve interfiber or interfibril bonding in fiber materials, for improved mechanical performance.
基于热压木纤维或纳米纤维素原纤维（无聚合物基体）的低孔隙率材料代表了一种具有有趣机械性能的环保材料新概念。为了替代化石基材料，木纤维材料的物理性能需要得到改善。此外，与化石基复合材料（如玻璃纤维复合材料）相比，生产该材料所需的碳足迹和累积能量也需要降低。含木质素的纤维和纳米纤维产量高，对于开发更可持续的材料技术具有特殊意义。本小型综述对其潜力进行了简要分析。讨论了含木质素木纤维的不同提取途径、不同加工方法以及所得纤维材料的性能。并与类似的含木质素纳米纤维材料进行了比较，重点强调了机械性能和生态指标。较高的木质素含量可能促进环保特性，并改善纤维材料中的纤维间或原纤维间结合，从而提高机械性能。
