No abstract

In cellulose‐based plastics, as a type of thermoplastic and thermosetting materials, the excellent balance of mechanical strength and ductility poses a large challenge. To tackle this problem, a novel approach is devised to introduce reversible non‐covalent ester cross‐linking into dynamic covalent hydrogen‐bonded polymer networks. However, the formation of ester bonds typically requires excess reactants and dehydrating agents, which is energy‐intensive, environmentally harmful, and costly. To address these concerns, inspired by polyester‐rich plant bark, a supramolecular composite material is developed. It can be dissolved and regenerated using a binary solvent system (choline hexanoate/choline chloride‐oxalic acid). In water, this supramolecular composite material underwent self‐healing and ester exchange reactions to form double‐cross‐linked networks, interfaced with photo‐thermal catalysis promoting the reaction due to its high photo‐thermal conversion efficiency (86.7%) and water evaporation rate (1.38 kg m−2 h−1). This enables the rapid and repeatable construction of durable and stretchable biomaterials. The mechanical properties of the supramolecular plastic can be adjusted by solar photo‐thermal conditions of the synthesis environment. These materials exhibit high performance in solar water evaporation and have self‐healing properties and are degradable, recyclable, and capable of eliminating their own adhesions.

How to achieve a balance between energy conversion and CO2 emission in biomass materials is one of the urgent problems to be solved. Inspired by diatoms, a simple method was used to deposit silica aerogel mineralized layer in cork cells. The thermal decomposition behavior and products of four kinds of corks CS-P (cork of Quercus suber)、CV-P (cork of Quercus variabilis B1)、CSS-P (cork of Quercus suber deposited with silica aerogels) and CSV-P (cork of Quercus variabilis B1 deposited with silica aerogels)were systematically studied, and the carbon capture of silica aerogel in cork and the production mechanism of high-value products during pyrolysis were deeply studied. Interestingly, this method has dual effects. In the pyrolysis process, the existence of silica aerogel significantly reduces the emissions of CO2 and aldehyde, while the output of aromatic hydrocarbons and other products with added value is significantly increased. This work provides a novel and effective method to convert and manage biological waste resources to achieve environmental sustainability and carbon neutrality.