Influence of drying method on the crystal structure and thermal property of oil palm frond juice-based bacterial cellulose

Dehydration of wet bacterial cellulose (BC) mainly focuses on the physical characteristic or mechanical strength, but its polymorph crystal structure and thermal properties were rarely discussed. Herein, this study utilizes the drying method of hot-pressed and freeze-dried to the wet BC to elucidate...

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Bibliographic Details
Published in:Journal of materials science 2022, Vol.57 (2), p.1462-1473
Main Authors: Mohamad, Shahril, Abdullah, Luqman Chuah, Jamari, Saidatul Shima, Al Edrus, Syeed Saifulazry Osman, Aung, Min Min, Mohamad, Sharifah Fathiyah Sy
Format: Article
Language:English
Subjects:
Cellulose
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Comparative analysis
Crystal structure
Crystallinity
Crystallography and Scattering Methods
Crystals
Dehydration
Endothermic reactions
Enthalpy
Exothermic reactions
Freeze drying
Materials Science
Methods
Oil palm trees
Physical properties
Polymer Sciences
Polymers & Biopolymers
Pseudomorphs
Solid Mechanics
Structure
Thermal properties
Thermal stability
Thermodynamic properties
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Summary:Dehydration of wet bacterial cellulose (BC) mainly focuses on the physical characteristic or mechanical strength, but its polymorph crystal structure and thermal properties were rarely discussed. Herein, this study utilizes the drying method of hot-pressed and freeze-dried to the wet BC to elucidate the BC polymorph crystal structure in correlation with the BC crystallinity and thermal properties. The results indicate that dehydration of BC using hot-pressed (BC-HP) method reduced the cellulose I α allomorph fraction by ± 5.0%, increased the crystallinity by ± 5.0%, but lower in thermal stability compared to freeze-dried (BC-FD) method. Additionally, BC-HP shows an exothermic reaction of melting at lower enthalpy value which is contradict to BC-FD and plant cellulose that presented an endothermic reaction with higher enthalpy values. Thus, investigation on BC polymorph crystal structure and thermal properties may offer an important role to regulate the desired characteristic of the dried BC.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-021-06685-5