Bone-inspired healing of 3D-printed porous ceramics

Abstract

Inspired by bone healing, bacterial precipitation is harnessed to enable on-demand and autonomous healing of 3D-printed ceramics.

Growing Living Composites with Ordered Microstructures and Exceptional Mechanical Properties

“…Note that directly using urease to form CaCO 3 cannot initiate the mineralization starting from the lattice surface. [ 29 ] In the experiment, more and more white CaCO 3 minerals fill the free space over days (Figure 2B). The phenomenon is observed by optical microscopy and scanning electron microscopy (SEM) on the lattice beams (Figure 2CD).…”

“…The bacteria play two roles during the mineralization process: First, the bacteria secrete urease that can catalyze the decomposition of urea to form , which reacts with Ca 2+ to form CaCO 3 . [ 27,28 ] Second, the bacteria attached to the internal lattice surface serve as nucleation sites to initiate the mineralization of CaCO 3 crystals around the lattice surface, [ 29 ] followed by gradually filling up the void space. Note that directly using urease to form CaCO 3 cannot initiate the mineralization starting from the lattice surface.…”

“…The CT scanning images clearly display the ply orientations of mineral fibers on different layers. Besides, since the mineral growth is initiated from the surface‐attached bacteria, the formed minerals are firmly bonded on the polymer surface, [ 29 ] which can be revealed from the CT scanning images (Figure 5C) and interfacial SEM images (Figure S4, Supporting Information).…”

Conformable Multifunctional Space Fabric by Metal 3D Printing for Collision Hazard Protection and Self-Powered Monitoring

“…Thus, it is definitely the most promising solution to utilize the equipment and materials available on-site for the preparation of the required supplies and tools. 3D printing technology also known as additive manufacturing (AM) technology, which has a wide range of applications in the medical, , aerospace, , and construction fields , by using metal powders, , ceramics, , or polymers , (perfectly suitable for the wide materials selections of TENG) to prepare simple or complex parts by combining the advantages of standardized and customized production to produce parts with high strength, lightweight, and outstanding mechanical properties. − Through the innovative prowess of 3D printing, astronauts are bestowed with the power to manufacture essential components, equipment, and replacements in real time, precisely tailored to the unique demands of each mission. − The remarkable ability eliminates the need for reliance on earth supply, thus streamlining logistics and significantly elevating mission sustainability and reliability. Additionally, 3D printing technology obviates the necessity to premanufacture and package large quantities of equipment instead of manufacturing what is needed on demand in real time.…”

Mechanically adaptive composites through piezoelectricity

“…Bone's response to its surrounding loading environment provided a source of inspiration for different applications such as enhancing toughness, fatigue life, and modulus of materials, as well as healing of damaged materials. [8][9][10][11][12][13][14][15] In this article, an overview of the recent efforts in materials with self-adaptable mechanical properties will be discussed with a focus on piezoelectricity as a key component of the material systems. In addition, the main challenges and future potentials are discussed for further studies.…”