[Science China Materials]Wood-inspired engineering materials

  • [2018-08-13]

    Wood-inspired engineering materials 
    Bergström Lennart
     Affiliations
    * lennart.bergstrom@mmk.su.se
    SCIENCE CHINA Materials   10.1007/s40843-018-9340-6 

    Abstract
    Recently, a team led by Shu-Hong Yu from the University of Science and Technology of China (USTC) developed a family of synthetic polymeric woods through an “assembly-and-thermocuring” strategy using traditional phenolic resin and melamine resin as matrix materials. The liquid thermoset resins were unidirectionally frozen and freeze dried to generate a cellular structure with aligned pores. The polymer chitosan maintain the hierarchical architecture during processing and subsequent thermocuring. The artificial woods bear a close resemblance to natural woods in the mesoscale cellular structures with tunable pore size and wall thickness. The artificial woods manifest compressive strengths (~45 MPa) comparable to that of the natural woods and higher than that of many engineering materials with similar densities. The use of synthetic resins and a variety of inorganic and organic fillers in the artificial woods create a versatile cellular material with significantly better moisture and fire resistance compared to natural woods. The biomimetic strategy demonstrated by Yu et al could open up the design of materials suitable for e.g. packaging and thermal insulation. The interest in the materials would certainly increase if the synthetic resins can be replaced by biobased substitutes, and if scalable alternatives to the time-and energy-demanding freeze casting and freeze drying process could be developed.

    Science China Materials,2018-8-10,http://engine.scichina.com/publisher/scp/journal/SCMs/doi/10.1007/s40843-018-9340-6?slug=abstract


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