Development of Multifunctional Materials from Boron-Modified Bamboo Waste/Bio-Based Polyurethane Adhesive Composites
摘要
This study presents the development of sustainable boron-modified bamboo waste and modified used palm oil/castor oil blends bio-based polyurethane (PU) adhesive particleboards for multifunctional applications in green building materials. Comprehensive analyses were conducted to evaluate mechanical strength, acoustic absorption, thermal insulation, and radiation shielding efficiency. The results indicate that increasing bamboo density and boron content significantly enhances composite performance. The best formulation, D1000, exhibited excellent mechanical properties, including MOR of 48 MPa, MOE of 18651 MPa, and tensile strength of 0.68 MPa. Acoustic measurements revealed superior performance with a sound absorption coefficient of 0.73, sound absorption average of 0.05, and noise reduction coefficient of 0.05. Thermal conductivity results showed D1000 achieving 0.104 W/m K, confirming its effective thermal insulation capabilities. Radiation shielding tests revealed D1000’s lowest HVL (1.2 cm) at 60 keV, enhanced thermal neutron absorption due to boron embedment, and improved fast neutron attenuation through high hydrogen content and density. These findings establish boron-modified bamboo/bio-based PU particleboards as promising, eco-friendly alternatives for acoustic, thermal, and radiation shielding applications in green buildings. The integration of renewable materials and waste utilization supports environmental sustainability and advances green engineering practices.
Graphical Abstract