Effects of Bacterial Cellulose Whisker Melting Composite on Crystallization and Mechanical Properties of PHBV Composites

Zhou Xin Ting; Liu Jin Yan

Macromolecular Research, Vol.30, No.5, 325-333, May, 2022

DOI10.1007/s13233-022-0039-3 Export Citation

Effects of Bacterial Cellulose Whisker Melting Composite on Crystallization and Mechanical Properties of PHBV Composites

Zhou Xin Ting^†, and Liu Jin Yan^{1, †}

National Engineering Research Center for Healthcare Devices, Guangdong Institute Key Lab of Medical Electronic Instruments and Polymer Material Products, Institute of Health Medicine, Guangdong Academy of Sciences, Guangzhou 510500, P. R. China
¹Guangdong Mechanical and Electrical Polytechnic, Guangzhou 510500, P. R. China

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Acetylation of bacterial cellulose whisker (BCW) with acetic anhydride can effectively improve the thermal stability of BCW and the dispersion of interface compatibility with PHBV. The influence of the modified cellulose whiskers on the crystallization and mechanical properties of the PHBV matrix was studied using differential scanning calorimetry (DSC), polarization optical microscopy (POM), and XRD. The results show that ABCW has heterogeneous nucleation and hindrance effect on the PHBV matrix simultaneously. With the increase of ABCW content, PHBV gradually decreases from large spherulite and then increases, and the crystallinity decreases. When the content of ABCs is 1.2%, ABCW has the best strengthening effect on PHBV, and the bending strength and bending modulus are 44.7% and 34.5% higher than PHBV.

Keywords:PHBV;bacterial cellulose whisker;acetylation;nucleation;spherulites