Chinese scientists have developed a new strategy for large-scale fabrication of bio-inspired artificial wood that manifests lightweight and high-strength properties with the mechanical strength comparable to that of natural wood.
Chinese scientists have developed a new strategy for large-scale fabrication of bio-inspired artificial wood that manifests lightweight and high-strength properties with the mechanical strength comparable to that of natural wood. A study published on Friday in the journal Science Advances described the high-performance polymeric materials with wood-like cellular microstructures.
A research team led by Yu Shuhong from the University of Science and Technology of China (USTC) transformed traditional phenolic resin and melamine resin into the artificial wood-like materials by self-assembly and the thermocuring process, Xinhua reported. Their strategy provided a new route to fabricate and engineer a wide range of high-performance biomimetic engineering composite materials with desirable multiple functions and advantages over the traditional counterparts, having broad potential applications in many technical fields.
The liquid thermoset resins were firstly “unidirectionally” frozen to prepare a “green body” with the cellular structure, followed by the subsequent thermocuring to get the artificial polymeric woods. They are highly controllable in the pore size and wall thickness. Starting from aqueous solution, the strategy also represented a green approach to prepare multifunctional artificial woods by compositing various nanomaterials, such as cellulose nanofibers and graphene oxide, according to the study.
Compared with natural woods, the artificial woods have better corrosion resistance to water and acid with no decrease in mechanical properties. They also have better thermal insulation and fire retardancy. The artificial polymeric woods stand out from other engineering materials such as cellular ceramic materials and aerogels in terms of specific strength and thermal insulation properties. As a kind of biomimetic engineering materials, this new family of bio-inspired polymeric woods is supposed to replace the natural wood when used in harsh environments, Yu said.