Background: Natural biopolymers have drawn extensive attention because of their great biocompatibility,
biodegradability, renewability, and the availability of various reactive functional groups for modifying and introducing
novel components. In the last few years, numerous natural biopolymer composites have been exploited to improve their
physical and chemical properties and add new functionalities.
Methods: Herein, we summarize the current progress of three common classes of natural biopolymer-based composites
including alginate, chitosan, and gelatin.
Results: The morphology characteristics, preparation methods, and unique functionalities of these biopolymer composites
are also analyzed and discussed.
Conclusion: Finally, the article offers an overview of recent progress of the main biomedical applications such as tissue
engineering, wound-healing, and drug delivery, which inspires further progress of biopolymer composites with tailored
mechanical property and stable characteristics for pharmaceutical and biomedical applications.