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    Solvent-free preparation of thermoplastic bio-materials from microcrystalline cellulose (MCC) through reactive extrusion

    Year: 2022

    Journal: Int. J. Biol. Macromol., Volume 217, SEP 30, page 193–202

    Authors: Yang, Pei; Yan, Ming; Tian, Chaochao; Huang, Xingyu; Lu, Hailong; Zhou, Xiaofan

    Organizations: Postgraduate Research &Practice Innovation Program of Jiangsu Province [KYCX21_0884, SJCX18-0320]; Foundation of Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education of China [KF202001]

    Keywords: Kraft lignin (KL); Microcrystalline cellulose (MCC); Screw extrusion; Thermoplastic

    Cellulose, as a renewable biopolymer, was acknowledged as a promising alternative for petroleum polymer. However, the poor thermoplasticity of cellulose caused a limitation in its full development. Herein, a solvent-free and simple strategy was proposed for the preparation of thermoplastic bio-materials from microcrystalline cellulose (MCC). Kraft lignin (KL) was employed as a plasticizer in this work. It was demonstrated that MCC-based materials with great thermoplasticity and mechanical properties could be successfully prepared by reactive extrusion. The obtained MCC-based material ML8G (with 50 wt% KL adding) possessed great thermostability and thermoplastic properties with an obvious glass transition temperature (T-g) at 106 degrees C. In addition, the bending strength, flexural modulus and storage modulus of the MCC-based material were improved to 20.44 MPa, 3139.47 MPa and 5.81 GPa respectively. Furthermore, the obtained MCC-based material exhibited good water stability and biodegradability. The comprehensive results confirmed the feasibility of MCC-based materials plasticized with KL through reactive extrusion. Overall, this work was a promising development in the field of bio-plastic utilization of natural products from a green source.
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