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Delignification of the renewable resource wood, a subsequent topographic stacking of the cellulosic scaffolds, and a final densification allow fabrication of desired 3D shapes with tunable fiber architecture.

In this work, wood is turned into a versatile engineering material by incorporating mechanical gradients and by locally adapting the fiber alignment, using a shaping mechanism enabled by reversible interlocks between wood cells. When materials such as wood are directly used in high‐performance applications, it is not possible to entirely profit from these optimizations because stiffness alterations and fiber alignment of the natural material are not designed for the desired application. By scalable open-mold vacuum processing, DCMs with high tensile properties can be fabricated to partially replace less sustainable materials such as glass fibre reinforced composites in the future.Įlegant design principles in biological materials such as stiffness gradients or sophisticated interfaces provide ingenious solutions for an efficient improvement of their mechanical properties. The low intrinsic density of cellulose fibres results in attractive specific tensile properties, which are above previously reported values obtained for natural fibre composites such as flax or sisal.

The epoxy matrix is vacuum infiltrated into the scaffold before densification and curing and provides an additional stiffening effect. Matrix infiltrated DWRPs reveal excellent tensile properties with elastic moduli of up to 70 GPa and 600 MPa strength. The high mechanical properties are obtained by a combination of high fibre volume content (FVC) of up to 80% and stress transfer throughout the cellulose scaffold enabled by mechanically interlocked fibre-fibre interfaces.

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Matrix free DCMs possess good tensile properties with a stiffness up to 40 GPa and strength up to 250 MPa. Both concepts, Densified Cellulose Materials (DCMs) and Delignified Wood Reinforced Polymers (DWRPs), are based on delignification and densification of wood. In this regard, two novel concepts for the development of high-performance wood-based materials in scalable top-down approaches are presented. Wood has great potential to play an important role in future materials advancement due to its excellent mechanical properties and high abundance. More on epoxy resins will be discussed at 13th Phenol/Acetone & Derivatives Markets on 9-10 March, 2016, in Shanghai.The development of sustainable materials from renewable resources is one of the key challenges in today's materials science. Hexion also expects that the expansion will help them produce locally thus shortening supply times for its epoxy resins, curing agents and modifiers, including its latest development, a water-borne, 2K zinc-rich resin system. The new investment will enable its customers to meet the stringent environmental standards and adopt sustainable paints and protective coatings. Hexion is a market leader in sustainable epoxy coatings and it is one of the first global suppliers to bring the high-end epoxy water-borne technology to the region. The demand for water-borne epoxy coatings is growing and the new expansion in China will enable Hexion to meet new demand. Water-borne epoxy resins are a sustainable alternative to solvent-based coatings as they reduce volatile organic compounds significantly. The plant will use a new reactor to produce water-borne epoxy products that are mainly used in waterborne coatings, polymer flooring as well as carbon fibers used in wind energy, automotive and aerospace applications. has announced plan to expand its water-borne epoxy resin production capacity in Tianjin.

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