Performance and environmental implication assessments of green bio-composite from rice straw and bamboo
2022
Pang, Bo | Zhou, Tong | Cao, Xue-Fei | Zhao, Bao-Cheng | Sun, Zhuohua | Liu, Xi | Chen, Yue-Ying | Yuan, Tong-Qi
The clean and eco-efficient utilization of agro-industrial lignocellulose wastes is imperative for social development. This study proposes a viable strategy combining rice straw and waste bamboo particles into bio-composites using green adhesives. These new bio-composites can displace the traditional wood-particle boards, which is a viable strategy to economize on wood resources. The internal bonding strength reached 0.57 MPa, and the thickness swelling rate was 7.00% (24h), which met the ISO requirements for P-FN MR1 particleboard in humid conditions. The characterizations of profile density distribution and microstructure were used to elucidate the mechanical strength and water resistance of bio-composites associated with the surface morphology of biomass and the density variation of bio-composites. The obtained green bio-composites can be utilized with long service life to realize carbon sequestration from agro-industrial lignocellulose wastes. According to the LCA, the net carbon flux could reach −1198.49 kg CO₂ eq. when producing 1 m³ bio-composite. Meanwhile, if this strategy is successfully extended to the global particleboard market, the utilization of 23.97 million tonnes of rice straw per year can economize on 1.61 million hm² of the forest, and decrease the emission of CO₂ by 63.76 million tonnes. This study provided a new straw/bamboo-based bio-composite. While using agro-industrial lignocellulose wastes efficiently, this new strategy can appreciably favour carbon neutrality.
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