Preparation of Corn Cellulose Films with Controllable Mechanical Property by Using Switchable CO2 /DBU/ DMSO System

By : Baohai Pan, Juncheng Huang, Lai Chen, Fei Liui, Chen Jing, Haining Na, Jin Zhu

Page No: 17-27

Abstract
A switchable CO2 /1,8-diazabicyclo[5.4.0]undec-7-ene (DBU)/dimethyl sulfoxide (DMSO) solvent system is applied to prepare corn cellulose film with controllable mechanical property. By use of the switchable CO2 /DBU/DMSO system, a rather simple process concerning reacted dissolution and heated precipitation controlled by addition and releasing of CO2 respectively, to prepare corn cellulose film, is formed. Results exhibit the degree of dissolution of corn cellulose is easily controlled just by adjusting the feeding amount of DBU in the switchable solvent system. Accordingly, some undissolved part of corn cellulose with relative high crystallinity can be appropriately retained to contribute to the improvement of mechanical properties.When DBU/ anhydroglucose unit ratio is equal to 2.5:1, corn cellulose film shows the optimal mechanical properties. The tensile strength and tensile modulus respectively reach 71.3MPa and 4.6±0.2GPa. This research provides a feasible technical methodology to prepare corn cellulose film for potential application as a sustainable material in the future

Authors:
Baohai Pan, JunCheng Huang, Fei Liu, Chen Jing, Haining Na & Jin Zhu
Key Laboratory of Bio-based Polymeric Materials of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, China

Lai Chen
Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, P.R. China
 

DOI: https://doi.org/10.32381/JPM.2020.37.1-2.2