Abstract：
The autocatalyzed ethanolic organosolv process is gaining increasing attention for the sulfur-free isolation of lignin, which is subsequently used as a renewable substitute for various fossil-based applications. For the first time, the mechanochemical influence of seven different particle sizes of two different biomasses on the respective organosolv lignin structure is examined. Wine pruning (Pinot Noir) and wine pomace (Accent) are used for organosolv process with particle sizes ranging from 2.0-1.6 mm to less than 0.25 mm. As particle size decreases, the weight-average molecular weight increases, while the total phenol content decreases significantly. Additionally, the distribution of the lignin-typical monolignols and relevant substructures, as determined by two-dimensional heteronuclear nuclear magnetic resonance spectra single quantum coherence (HSQC), is observed. The degree of grinding of the biomass has a clear chemical-structural influence on the isolated HG and HGS organosolv lignins. Therefore, it is crucial to understand this influence to apply organosolv lignins in a targeted manner. In the future, particle size specifications in the context of the organosolv process should be expressed in terms of distribution densities rather than in terms of a smaller than specification.
摘要：
自催化的乙醇有机溶剂工艺越来越受到木质素无硫分离的关注，随后被用作各种基于化石的应用的可再生替代品。第一次,研究了两种不同生物质的七个不同粒径对各自的有机溶剂木质素结构的机械化学影响。葡萄酒修剪（黑皮诺）和葡萄酒果渣（Accent）用于有机溶剂工艺，粒径范围为2.0-1.6mm至小于0.25mm。随着颗粒尺寸的减小，重均分子量增加，而总酚含量显著下降。此外,木质素典型的单木素和相关子结构的分布，通过二维异核核磁共振谱确定单量子相干(HSQC)，被观察到。生物质的研磨程度对分离的HG和HGS有机溶剂木质素具有明显的化学结构影响。因此,有针对性地应用有机溶剂木质素，了解这种影响是至关重要的。在未来,在有机溶剂法的上下文中,粒度规格应当以分布密度而不是以小于规格的方式来表示。本文受版权保护。保留所有权利。
