Chitin, poly N-acetylglucosamine, has a great potential for use on an industrial scale as an enzyme carrier but it has an unfavorable particle structure that can be modified using ionic liquids (ILs). Several ionic liquids were investigated that have the same substituents on the ring (methyl- and propyl-) but differed in the type of cationic ring (pyrrolidinium, piperidinium, and piperazinium). Organic acid ions (acetic and lactic) were used as counter ions. 1-ethyl-3-methyl-imidazolium acetate and 1-ethyl-3-methyl-imidazolium lactate were used as a reference. The results confirm that the chitin particle structure or size, or both, simultaneously changes if chitin is dissolved in an IL and then precipitated. Organic acid anions and short substituents on the cationic ring of ILs influenced particle modification substantially, whereas the type of ring played a minor role. Additionally, the ionic liquids [MPpyrr][OAc], [MPpip][OAc] and [DMPpz][OAc] could be reused up to at least 4 times without losing their ability to dissolve chitin.

几丁质，聚N-乙酰氨基葡糖，在工业规模上具有作为酶载体的巨大潜力，但它具有不利的颗粒结构，可以使用离子液体（ILs）对其进行改性。研究了几种离子液体，它们在环上具有相同的取代基（甲基和丙基），但阳离子环的类型不同（吡咯烷鎓，哌啶鎓和哌嗪鎓）。有机酸离子（乙酸和乳酸）用作抗衡离子。乙酸1-乙基-3-甲基咪唑鎓和乳酸1-乙基-3-甲基咪唑鎓用作参照。该结果证实，如果几丁质溶解在IL中然后沉淀，则几丁质颗粒的结构或大小或两者同时改变。ILs阳离子环上的有机酸阴离子和短取代基对粒子改性有很大影响，而戒指的类型只扮演了次要的角色。另外，离子液体[MPpyrr] [OAc]，[MPpip] [OAc]和[DMPpz] [OAc]可以重复使用至少4次，而不会失去溶解几丁质的能力。