Open Access

ARTICLE

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

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1 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
2 Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, P.R. China

* Corresponding Authors: e-mail: ,

Journal of Polymer Materials 2020, 37(1-2), 17-27. https://doi.org/10.32381/JPM.2020.37.1-2.2

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.

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