文献类型：期刊文献

英文题名：Preparation and Characterization of Chitosan by a Novel Deacetylation Approach Using Glycerol as Green Reaction Solvent

作者：Liu, Cuiyun[1] Wang, Guanhua[1,2,3] Sui, Wenjie[4] An, Liangliang[1] Si, Chuanling[1,3,5]

第一作者：Liu, Cuiyun

通信作者：Wang, GH[1];Si, CL[1];Wang, GH[2];Wang, GH[3];Si, CL[3];Si, CL[4]

机构：[1]Tianjin Univ Sci & Technol, Coll Paper Making Sci & Technol, Tianjin Key Lab Pulp & Paper, Tianjin 300457, Peoples R China;[2]Zhejiang Univ Sci & Technol, Key Lab Recycling & Ecotreatment Waste Biomass Zh, Hangzhou 310023, Zhejiang, Peoples R China;[3]South China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Guangdong, Peoples R China;[4]Tianjin Univ Sci & Technol, Key Lab Food Nutr & Safety, Minist Educ, Tianjin 300457, Peoples R China;[5]Chinese Acad Forestry, State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China

年份：2017

卷号：5

期号：6

起止页码：4690-4698

外文期刊名：ACS SUSTAINABLE CHEMISTRY & ENGINEERING

收录：;EI(收录号：20172303739450);Scopus(收录号：2-s2.0-85020169180);WOS:【SCI-EXPANDED(收录号:WOS:000402950000025)】；

基金：Financial support for this study was kindly provided by Natural Science Foundation of Tianjin City (Grant 16JCQNJC05900), Foundation of Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province (Grant 2016REWB21), Foundation of State Key Laboratory of Pulp and Paper Engineering (Grants 201503, 201611), and Foundation of State Key Laboratory of Tree Genetics and Breeding (Chinese Academy of Forestry) (Grant TGB2016002).

语种：英文

外文关键词：Chitin; Deacetylation; Glycerol; Process optimization; Chitosan characterization

摘要：Traditional methods for chitin deacetylation require aqueous solution with high alkali content as reaction solvent, which generate huge environmental pressure for the treatment of vast alkaline wastewater. In this work, glycerol, a nontoxic, biodegradable, and sustainable liquid from biodiesel production, is employed as a novel reaction solvent for chitin deacetylation at elevated temperature. The results showed that the chitosan deacetylation degree (DD) was up to 85.36 +/- 1.04% and the corresponding viscosity-average molecular weight (M-V) was 30 874 +/- 1123 g mol(-1) under the optimized conditions of this process. The subsequent Fourier transform infrared (FTIR) characterization structurally demonstrated the occurrence of deacetylation and the fracture of glucosidic bond. Thermogravimetric analysis (TGA) and X-ray diffraction (XRD) analysis further revealed that the DD presented a negative effect on the thermal stability and crystallinity of chitosan. Consequently, the study successfully indicated that using glycerol as a reaction solvent could realize the deacetylation of chitin with lower NaOH concentration and provide an efficient and green process for chitosan preparation from chitin.