Print Email Facebook Twitter Scalable bacterial production of moldable and recyclable biomineralized cellulose with tunable mechanical properties Title Scalable bacterial production of moldable and recyclable biomineralized cellulose with tunable mechanical properties Author Yu, K. (TU Delft BN/Marie-Eve Aubin-Tam Lab; Kavli institute of nanoscience Delft) Spiesz, E.M. (TU Delft BN/Marie-Eve Aubin-Tam Lab; Kavli institute of nanoscience Delft) Balasubramanian, S. (TU Delft BN/Marie-Eve Aubin-Tam Lab; TU Delft Materials and Manufacturing; Kavli institute of nanoscience Delft) Schmieden, D.T. (TU Delft BN/Marie-Eve Aubin-Tam Lab; Kavli institute of nanoscience Delft) Meyer, Anne S. (University of Rochester) Aubin-Tam, M.E. (TU Delft BN/Marie-Eve Aubin-Tam Lab; Kavli institute of nanoscience Delft) Date 2021 Abstract Sustainable structural materials with excellent impact-resistance properties are urgently needed but challenging to produce, especially in a scalable fashion and with control over 3D shape. Here, we show that bacterial cellulose (BC) and bacterially precipitated calcium carbonate self-assemble into a layered structure reminiscent of tough biomineralized materials in nature (nacre, bone, dentin). The fabrication method consists of biomineralizing BC to form an organic/inorganic mixed slurry, in which calcium carbonate crystal size is controlled with bacterial poly(γ-glutamic acid) and magnesium ions. This slurry self-assembles into a layered material that combines high toughness and high impact and fire resistance. The rapid fabrication is readily scalable, without involving toxic chemicals. Notably, the biomineralized BC can be repeatedly recycled and molded into any desired 3D shape and size using a simple kitchen blender and sieve. This fully biodegradable composite is well suited for use as a component in daily life, including furniture, helmets, and protective garments. Subject bacterial cellulosebio-based materialbiofabricationbiomineralizationnacrenacre-inspired materialsstructural materialssustainable materialstoughness To reference this document use: http://resolver.tudelft.nl/uuid:c6294365-9c38-45c2-90d3-0a9710948065 DOI https://doi.org/10.1016/j.xcrp.2021.100464 Source Cell Reports Physical Science, 2 (6) Part of collection Institutional Repository Document type journal article Rights © 2021 K. Yu, E.M. Spiesz, S. Balasubramanian, D.T. Schmieden, Anne S. Meyer, M.E. Aubin-Tam Files PDF 1_s2.0_S266638642100165X_main.pdf 4.43 MB Close viewer /islandora/object/uuid:c6294365-9c38-45c2-90d3-0a9710948065/datastream/OBJ/view