Monodispersive functionalized lignin fractions and components as precusors for fiber production

该项目的目标是科学工作，以制备和研究木质素基聚合物作为碳纤维生产的前体。此外，改性的工业木质素，另一方面，从木质素化合物合成的模型物质将被检查。工业木质素通常显示出宽的分子量贡献以及低反应性，其可用于纤维生产中的互连，这导致非均匀纤维。木质素的分馏应得到较窄的分子量贡献。应通过化学和酶氧改性的方法插入新的活性中心。多糖等杂质是另一个重要问题。这些应该通过用纤维素酶和半纤维素酶进行酶处理来减少。在平行的模型物质从典型的木质素化合物将聚合。所有这些木质素将测试热塑性制备木质素纤维。

The objective of the project are scientific works to the preparation and investigation of lignin-based polymers as a precursor for the carbon fibre production. Besides, modified technical lignins and, on the other hand, model substances which are synthesised from lignin compounds will be examined. Technical lignin often shows a wide molecular mass contribution, as well as low reactivities which can be used for an interlinking in the fibre production, which results in non homogenous fibers. Narrower molecular mass contribution should be received by a fractionation of lignins. New reactive centres should be inserted by means of chemical and enzymatical oxygen modification. Impurities like polysaccharides are another important problem. These should be reduced by an enzymatically treatment with cellulases and hemi cellulases. In parallel model substances from typical lignin compounds will be polymerized.All of these lignins will tested for thermo-plastically preparation of lignin fibers.