Plant-based biopolymers have emerged as promising alternatives to conventional petroleum-derived plastics due to growing concerns over environmental pollution, depletion of fossil resources, and the need for sustainable material solutions. Despite extensive use of synthetic polymers, their non-biodegradability and ecological impact highlight a critical research gap in the development of eco-friendly and high-performance materials. This review aims to critically examine plant-derived biopolymers obtained from renewable resources such as starch, cellulose, lignin, and plant oils, focusing on their synthesis, properties, and applications. Recent advancements in conventional and green polymerization techniques have significantly improved the efficiency, scalability, and functional performance of these materials. The physicochemical, mechanical, and thermal properties of plant-based polymers are strongly influenced by feedstock selection, processing parameters, and modification strategies. Although these materials often exhibit lower mechanical strength compared to synthetic plastics, their performance can be enhanced through blending, reinforcement, and plasticization approaches. In addition, their biodegradability and lower carbon footprint contribute to reducing persistent plastic waste in the environment. The increasing demand for sustainable materials, supported by regulatory policies, has accelerated their applications in packaging, biomedical fields, agriculture, and consumer products. However, challenges such as cost competitiveness, large-scale production, long-term stability, and lack of standardization remain significant barriers. Future research should focus on advanced material design, efficient biomass utilization, and sustainable processing technologies. Overall, plant-based biopolymers offer a viable pathway toward achieving a circular and sustainable materials economy.
Barwant et al. (Mon,) studied this question.