Xu Jiayun, Zhou Hao, Zheng Yong, Li Chenyu, Dai Lin, Xu Chunlin, Si Chuanling
Tianjin Key Laboratory of Pulp and Paper School of Light Industry Science and Engineering, Tianjin University of Science and Technology, No. 9 at 13th Avenue, TEDA, Tianjin, 300457, P. R. China.
Research Group of Wood and Paper Chemistry, Laboratory of Natural Materials Technology, Åbo Akademi University, Turku, FI-20500, Finland.
ChemSusChem. 2022 Apr 22;15(8):e202200449. doi: 10.1002/cssc.202200449. Epub 2022 Mar 25.
As a new and green type of nanomaterials, lignin nanoparticles (LNPs) have been considered as high-value renewable materials for application in many fields. However, the industrialization of LNPs faces many challenges, such as high manufacturing costs and small-scale production. Here, a simple but rapid and reversible approach for the fabrication of LNPs was provided via switching pH environments. The LNPs were regularly shaped in the acetonitrile/water system, and their size appeared to be very homogeneous. The alternation of forming and dissolving of LNPs could be repeated many times simply by alternately adding acid and alkaline solutions. There was little difference in the molecular structures between the original and regenerated LNPs. In addition, the consumption of solvents for LNPs production was only 200 mL g , reduced by more than 10 times compared with conventional solvent exchange methods. The concentration of LNPs in the solution also improved to 5.0 g L . This study not only provides a new, simple, and effective strategy for the fabrication of LNPs but also paves the way towards their real green production and application.
作为一种新型绿色纳米材料，木质素纳米颗粒（LNPs）被视为可应用于众多领域的高价值可再生材料。然而，LNPs的工业化面临诸多挑战，如制造成本高和生产规模小等问题。在此，通过改变pH环境提供了一种简单、快速且可逆的制备LNPs的方法。LNPs在乙腈/水体系中形状规则，且其尺寸看起来非常均匀。只需交替添加酸和碱溶液，LNPs的形成和溶解过程就能重复多次。原始LNPs与再生LNPs之间的分子结构几乎没有差异。此外，生产LNPs的溶剂消耗量仅为200 mL /g，与传统溶剂交换方法相比减少了10倍以上。溶液中LNPs的浓度也提高到了5.0 g /L。本研究不仅为LNPs的制备提供了一种新的、简单且有效的策略，还为其真正的绿色生产和应用铺平了道路。
