In Situ Lignin Adhesion for High-Performance Bamboo Composites

Abstract

Bamboo composite is an attractive candidate for structural materials in applications such as construction, the automotive industry, and logistics. However, its development has been hindered due to the use of harmful petroleum-derived synthetic adhesives or low-bonding biobased adhesives. Herein, we report a novel bioadhesion strategy based on in situ lignin bonding that can process natural bamboo into a scalable and high-performance composite. In this process, lignin bonds the cellulose fibrils into a strong network via a superstrong adhesive interface formed by hydrogen bonding and nanoscale entanglement. The resulting in situ glued-bamboo (glubam) composite exhibits a record-high shear strength of ∼4.4 MPa and a tensile strength of ∼300 MPa. This in situ lignin adhesion strategy is facile, highly scalable, and cost-effective, suggesting a promising route for fabricating strong and sustainable structural bamboo composites that sequester carbon and reduce our dependence on petrochemical-based adhesives.

Pretreatment Process Before Heat Pyrolysis of Plant‐based Precursors Paving Way for Fabricating High‐Performance Hard Carbon for Sodium‐Ion Batteries

“…This process will cause the structure of biomass precursor to change during the process of removed impurity. For example, the use of strong alkali in the process of lipid rich biomass, long-term heating will make the chain of lignin and hemicellulose inside biomass material break, [66] thus affecting the their overall morphology and structure. Therefore, it is necessary to pay attention to the amount of sample and processing time when removing impurities, and the impact of different times will produce greater changes in appearance.…”

Modification and Application of Bamboo-Based Materials: A Review—Part II: Application of Bamboo-Based Materials

“…The assembly method and treatment processing affect the bonding performance of glued bamboo. Meng et al reported that an in situ glued-bamboo (glubam) composite demonstrated record-high shear strength of approximately 4.4 MPa and tensile strength of around 300 MPa [23]. The experimental flow chart and comparison of results are shown in Figure 2.…”

Desirable Strong and Tough Adhesive Inspired by Dragonfly Wings and Plant Cell Walls

“…Current wood adhesives employed in furniture, flooring, construction, and decoration predominantly originate from fossil-derived polymers, including formaldehyde-based adhesives and epoxy adhesives. − Hazardous compounds including formaldehyde and phenol are continuously released during the production and use of aldehyde-based adhesives, endangering both people’s health and the environment. − The depletion of oil resources and rising environmental concern have inspired researchers to seek eco-friendly and efficient alternatives from nature, which are green, renewable, and simple to process. Soybean meal (SM), an agricultural coproduct, offers the advantage of being abundant, inexpensive, and adaptable, showing great potential in panel manufacturing .…”