State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Key Laboratory of Energy Biotechnology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China.
State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Key Laboratory of Energy Biotechnology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China.
Carbohydr Polym. 2021 Apr 15;258:117652. doi: 10.1016/j.carbpol.2021.117652. Epub 2021 Jan 27.
Breaking the recalcitrant structure of native crystalline cellulose is an energy demanding rate liming step in the production of glucose from cellulosic biomass. Mix-milling of lignocellulosic substrates (with PO) dramatically increased glucose yield. In this work, the changes of physicochemical characteristics (morphology, structure, degree of polymerization (DP), solubility) of cellulose during mix-milling (with PO) are correlated with glucose yield in the subsequent chemical hydrolysis process. The mix-milling enables highly efficient breakdown of cellulose I crystalline to smaller amorphous particles with low DP, which is recrystallized into cellulose II structure after water-wetting. As a result, the mix-milled cellulose (MMC) shows higher hydrolysis reactivity than that of single-milled cellulose (SMC). The results showed that small particle size, low DP, higher solubility and cellulose II content are correlated with the hydrolysis reactivity of cellulose.
打破天然结晶纤维素的顽固结构是从纤维素生物质生产葡萄糖过程中能耗较高的限速步骤。木质纤维素底物（与 PO 混合）的球磨显著提高了葡萄糖产率。在这项工作中，纤维素在球磨（与 PO 混合）过程中物理化学性质（形态、结构、聚合度（DP）、溶解度）的变化与后续化学水解过程中的葡萄糖产率相关。球磨使纤维素 I 结晶高效地分解为具有低 DP 的较小无定形颗粒，这些颗粒在水润湿后再结晶成纤维素 II 结构。结果，与单一磨碎纤维素（SMC）相比，磨碎纤维素（MMC）显示出更高的水解反应性。结果表明，小颗粒尺寸、低 DP、高溶解度和纤维素 II 含量与纤维素的水解反应性相关。
