Chinese researchers have developed a bamboo-based bioplastic that matches the strength of conventional plastics while remaining fully biodegradable. The study, published in Nature, describes a new way of reorganising bamboo cellulose at the molecular level to overcome common weaknesses in plant-based plastics, such as brittleness and poor mouldability.
The team started with cellulose extracted from bamboo rather than using the plant as a simple fibre filler. They used a hydrated zinc chloride and formic acid solvent to break apart bamboo’s natural hydrogen-bond network. Calcium chloride and ethanol treatments then reorganised the cellulose into a denser molecular structure.
The resulting material, called BM-plastic, reached a tensile strength of about 110 MPa, compared with just 9.7 MPa for the initial hydrogel. Its flexural modulus rose to 6.41 GPa. The plastic remained stable across a wide temperature range, from minus 30°C to 100°C, and showed resilience even at 180°C.
Researchers also demonstrated that BM-plastic can be moulded into complex shapes, including gears and honeycomb panels, without high heat or pressure. Thin samples showed strong light transmission, suggesting potential for transparent applications.
Unlike many bioplastics, BM-plastic can be recycled. Used material can be dissolved and reprocessed, retaining about 90% of its original strength. When buried in soil, it fully biodegraded within 50 days, aided by microbial activity, while conventional plastics tested alongside it showed little to no breakdown.
A techno-economic analysis estimated production costs at around $2,302 per tonne, with raw materials as the largest expense. The findings add to growing global interest in bamboo as a renewable material source, offering a possible path toward plastics that perform well without lasting environmental harm.
