环糊精双核铜（Cu₂-α/β-CD）与ε-聚赖氨酸（ε-PL）自组装微晶作为生物降解的磨砂材料可用于个人护理产品中。Cu₂-α/β-CD和ε-PL在水溶液中先配位再自组装成不太规整的棒状晶体，最后通过离心分离得到目标物。通过SEM、XRD及TG对材料的形貌、晶体结构和热稳定性进行了表征。结果表明，添加苯丙氨酸或酪氨酸到自组装体系中可以让晶体的形貌更规整和尺寸更大。而色氨酸的加入可以得到花瓣状晶体。所有微晶在水溶液中都稳定，但pH小于1时易分解。作为磨砂材料，自组装材料具有合适的硬度和抗压强度，能增强摩擦性能。此外，生物材料组成的微晶易降解，制造过程更加环保。

Self-assembled microcrystals made from copper-ion modified α/β-cyclodextrin (Cu₂-α/β-CD) and ε-polylysine (ε-PL) can be used as biodegradable abrasive materials for personal care products.Plastic microbeads have small size and difficulty in biodegradation,they cannot be removed by sewage treatment and are easy to accumulate in the environment,thus endangering aquatic organisms and threatening human safety through food chains.Cu₂-α/β-CD and ε-PL are firstly coordinated in aqueous solution,then self-assembled into irregular rod-like crystals,and finally separated via centrifugation.The morphology,crystal structure and thermal stability of the materials are characterized by SEM,XRD and TG.The results show that the addition of phenylalanine or tyrosine into the self-assembled system allows the crystal to be more regular and larger.The addition of tryptophan can help to obtain petal-like crystals.All microcrystals are stable in aqueous solution,but are easy to decompose when pH is less than 1.As an abrasive material,the self-assembled materials have appropriate hardness and compressive strength,which can enhance friction performance.In addition,the crystallites composed of biomaterials can be degraded easily and the manufacturing process shows more environmentally friendly.

张加(1994-),女,硕士研究生,研究方向为有机功能材料,644168443@qq.com