为探究分子量对甲壳素纳米纤维制备的影响，选取不同分子量甲壳素为原料，经化学漂白、高速剪切和超声处理等步骤制备了甲壳素纳米纤维。该研究探讨了使用不同分子量的甲壳素作为原料，在相同的制备条件下制备纳米纤维，并观察了这些条件下纳米纤维的产率及微观形貌的变化。SSHC其中低分子量SSHC由于纤维较短，缠结点较少，更易于分纤，可获得更高的纳米纤维产率。其次，在处理过程中，SSHC化学结构和晶型保持不变，能够在较短超声处理时间内（30 min）制备出50~125 nm直径的甲壳素纳米纤维，其中甲壳素纳米纤维的产率可达32.07%。该研究揭示了低分子量甲壳素制备纳米纤维的高效性，所制备的甲壳素纳米纤维在Pickering乳液体系中作为稳定剂有着较大的应用潜力，为实现甲壳素的高值化利用提供了良好的技术支撑。

To investigate the influence of molecular weight on the preparation of chitin nanofibers, chitin with varying molecular weights was selected as the raw material. Nanofibers were prepared under identical conditions of chemical bleaching, high-speed shearing, and ultrasonication. Under these conditions, the nanofiber yield and microstructural variations were explored. Due to shorter fibers and fewer entanglement points, lower molecular weight chitin facilitated easier fibrillation, resulting in higher nanofiber yields. Furthermore, the chemical structure and crystalline phase remained unchanged during processing, enabling the production of chitin nanofibers with diameters ranging from 50 to 125 nm within a short ultrasonication time (30 min), ultimately achieving a yield of up to 32.07%. This research reveals the efficiency of using low molecular weight chitin for nanofiber preparation, highlighting their significant potential as stabilizers in Pickering emulsion systems, and provides strong technical support for the high-value utilization of chitin.

国家自然科学基金项目（面上项目，重点项目，重大项目）