Researchers at the Indian Institute of Technology (IIT) Guwahati recently made a significant breakthrough in sustainable material innovation by developing an eco-friendly composite using Bambusa tulda, a fast-growing bamboo species native to Northeast India, combined with biodegradable polymers. This new bamboo-based composite has demonstrated high strength, excellent thermal stability, low moisture absorption, and cost-effectiveness, all the properties that make it a promising alternative to conventional plastics used in automotive interiors and other industries that depend heavily on non-biodegradable materials. Learn more about this remarkable material that will help the country to take a step forward toward cleaner and greener on SURFACES REPORTER (SR).
The research was led by Dr Poonam Kumari, Professor in the Department of Mechanical Engineering at IIT Guwahati. Her work addresses two critical challenges at once, where the global issue of plastic waste and the rising demand for sustainable alternatives in manufacturing sectors, particularly the automotive industry. By replacing petroleum-derived plastics with biodegradable, bamboo-reinforced materials, this innovation moves a step closer to achieving large-scale industrial sustainability.
The findings were published in the journal Environment, Development and Sustainability (Springer Nature) and co-authored by Dr Kumari along with her research scholars, Mr Abir Saha and Mr Nikhil Dilip Kulkarni. Their study focused on leveraging the mechanical and environmental advantages of bamboo by integrating it into modern polymer composites. The team experimented with four different formulations of bamboo-based composites, where Bambusa tulda fibers were reinforced using both bio-based and petroleum-based epoxy resins. Prior to mixing, the bamboo fibers were treated with an alkali solution to enhance their compatibility with the polymer matrix, which significantly improved adhesion, strength and long-term performance. These enhanced composites were rigorously evaluated across 17 distinct parameters, including tensile strength, impact resistance, thermal stability, moisture absorption and cost per kg to assess their suitability for real-world applications.
While each formulation exhibited unique strengths, none provided a perfect balance of performance across all the metrics. To determine the most optimized version, the researchers applied Multi-Criteria Decision-Making (MCDM), a structured analytical method commonly used in material selection. The evaluation concluded that the bamboo composite reinforced with bio-based epoxy FormuLite emerged as the best-performing formulation. This version displayed superior thermal stability, mechanical strength and low moisture absorption, while maintaining a competitive production cost of Rs 4,300 per kg. Reportedly, the resulting material offers immense potential for use in automotive interiors, including dashboards, door panels, seat backs and other components where durability, aesthetics and sustainability are equally valued. Additionally, it can be adapted for use in consumer electronics, aerospace and construction, replacing conventional materials like plastic, wood and metal.
Currently, the IIT Guwahati team is conducting a full life cycle assessment (LCA) to evaluate the environmental impact of the composite from production through disposal. The researchers further plan to scale up production using industrial processes such as compression molding and resin transfer techniques.
Image credit: IIT Guwahati