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Preparation and characterization of multifunctional cellulose-based materials modified by hyperbranched polyamide
Hongye Ren1, Zhimeng Zhao1, Junlong Gao1
1School of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China.
International Journal of Biological Macromolecules
|February 5, 2025
Summary
This study enhances bacterial cellulose (BC) films with hyperbranched polyamide (HBPA), significantly improving mechanical strength, piezoelectric properties, and antibacterial activity for advanced material applications.
Area of Science:
- Materials Science
- Polymer Chemistry
- Biomaterials Engineering
Background:
- Cellulose-based materials offer sustainable platforms for advanced applications.
- Bacterial cellulose (BC) possesses unique structural properties but requires modification for enhanced performance.
- Hyperbranched polyamides (HBPAs) can impart desirable characteristics to polymer matrices.
Purpose of the Study:
- To prepare and characterize cellulose-based films modified with hyperbranched polyamide (HBPA).
- To evaluate the impact of HBPA modification on the mechanical, piezoelectric, thermal, optical, and antibacterial properties of bacterial cellulose films.
- To explore the potential of HBPA-modified BC films in various technological fields.
Main Methods:
- Dissolution of bacterial cellulose (BC) using an alkaline urea solution at low temperatures.
- Modification of BC hydrogel with HBPA, followed by hot pressing to form cellulose-based films (BCF).
- Comprehensive characterization including tensile strength, piezoelectric performance, thermal decomposition, fluorescence, oxygen index, air permeability, and antibacterial assays.
Main Results:
- HBPA modification significantly enhanced the tensile strength of BCF from 11.22 MPa to 15.51 MPa.
- Piezoelectric performance improved, with open-circuit voltage increasing from 0.45 V to 1.09 V and short-circuit current density rising to 1.4 mA/cm².
- Modified films exhibited a thermal decomposition temperature around 270°C, fluorescence at 450 nm, high oxygen index (55.60), low air permeability, and notable inhibitory effects against Staphylococcus aureus and Escherichia coli.
Conclusions:
- Hyperbranched polyamide modification effectively enhances the mechanical and piezoelectric properties of bacterial cellulose films.
- The modified cellulose-based films demonstrate improved thermal stability, optical properties, and significant antibacterial activity.
- These findings highlight the potential of HBPA-modified BC films as versatile, high-performance biomaterials.
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