Lipase-catalyzed synthesis of long-chain cellulose esters using ionic liquid mixtures as reaction media
Lipase-catalyzed synthesis of long-chain cellulose esters using ionic liquid mixtures as reaction media
复制标题
使用离子液体混合物作为反应介质的脂肪酶催化长链纤维素酯的合成
DOI：
10.1002/jctb.5109
复制
发表时间：
2017
影响因子：
3.4
通讯作者：
Li Xiaofeng
中科院分区：
文献类型：
--
作者：
Wang Fengli;Zhao Guanglei;Lang Xiongfei;Li Junrong;Li Xiaofeng
BACKGROUNDLong‐chain cellulose esters can be used as packaging materials, film materials, biodegradable plastics and drug delivery agents. Chemical methods are commonly adopted for preparation of these esters using traditional chemical catalysts and organic solvents, which result in environmental and safety problems.RESULTA new enzymatic method was tested for synthesis of long‐chain cellulose esters in mixed ionic liquids. The key reaction conditions, including mass ratio of ionic liquids, acylating agents, lipase/cellulose mass ratio, reaction temperature and substrate molar ratio, showed significant influences on enzymatic acylation. FT‐IR and1H NMR spectra indicated the successful acylation of hydroxyl groups. SEM and XRD data showed significant changes in morphologies and crystallinity. The thermal properties of products were different from the original due to the disruption effect of ILs and the enzymatic acylation.CONCLUSIONA facile one‐step route is presented for synthesis of long‐chain cellulose esters. The lipase‐catalyzed synthesis is an ecofriendly and green approach for the modification of cellulose by replacing traditional chemical catalysts with enzymes and replacing organic solvents with ionic liquids. This biocatalytic approach may find its applications in preparation of potentially biodegradable materials for food, pharmaceutical and related industries. © 2016 Society of Chemical Industry
