本发明公开了一种从废弃小龙虾壳中制备几丁质纳米纤维的方法。该方法的步骤如下：废弃的小龙虾壳经过分拣，除去油脂及附着物，清洗后烘干并磨成虾壳粉；称取虾壳粉0 .2‑1g，加入4‑20的强极性有机试剂在室温下进行搅拌溶解，搅拌转速应不低于1200 rpm，搅拌时间不低于12 h；溶解结束后，加入4‑20mL强极性有机试剂稀释，并滤去不溶物，收集过滤清液，加40‑400mL水充分析出几丁质，收集几丁质，干燥后称量并计算提取率；将上述步骤中含有强极性有机试剂的混合液通过离心收集至溶剂回收装置，加热回收。该方法可有效提取虾壳粉中的几丁质，提取率可达到15 .26%，条件温和、操作简单，且试剂可回收利用。

The present invention discloses a method for preparing chitin nanofibers from discarded crayfish shells. The steps of this method are as follows: the discarded crayfish shells are sorted, oil and attachments are removed, cleaned, dried, and ground into shrimp shell powder; Weigh 0.2-1g of shrimp shell powder, add 4.2-20 strong polar organic reagent, and stir at room temperature for dissolution solution: The stirring speed should not be less than 1200 rpm and the stirring time should not be less than 12 hours; After dissolution, add 4-20mL of highly polar organic reagent to dilute and filter out insoluble substances. Collect the filtered clear solution, add 40-400mL of water to analyze the chitin, collect the chitin, dry it, weigh it, and calculate the extraction rate; Collect the mixture containing strong polar organic reagents in the above steps through centrifugation to the solvent recovery device, and heat it for recovery. This method can effectively extract chitin from shrimp shell powder, with an extraction rate of 15.26%. The conditions are mild, the operation is simple, and the reagent can be recycled.