摘要
Cellulose is a biodegradable and renewable natural material that it is naturally resistant to breaking and modification. Moreover, the crystalline structure of cellulose is a major factor restricting its industrial utilization. In this study, cellulose polymorphs were prepared from natural cellulose, and their solvability and thermal response were investigated. Using liquid- and solid-state NMR signals, the distinct types and dissolving states of cellulose polymorphs were identified. The thermal behavior of the polymorphic forms of cellulose-d was also evaluated, and cellulose Ⅱ exhibited the poorest thermal stability and a unique exothermic reaction.
基金
the National Natural Science Foundation of China (Grant No. 31770622)
the Beijing Natural Science Foundation (Grant No. 6174046)
the Fundamental Research Funds for the Central Universities (No. 2017PT13)
the China Scholarship Council (International Clean Energy Talent Programme (iCET), Grant No. 201702660054).
