2D and 3D graphical datasets for bamboo-inspired tubular scaffolds with functional gradients: micrographs and tomograms
Year: 2020
Type: data-paper
Abstract: Presented in this article are 2D and 3D graphical datasets in the form of micrographs and tomograms that were obtained as part of a systematic microstructural characterization by scanning electron microscopy and X-ray microtomography to illustrate freeze-cast bamboo-inspired tubular scaffolds with functional gradients ("Bamboo-inspired Tubular Scaffolds with Functional Gradients" [1]). Four material combinations of the coaxial 'core-shell' molds and their two end pieces were used to freeze cast highly porous tubes (Tube/Rod/Holder): ASA (Aluminum, 316 Stainless Steel, Aluminum), ASP (Aluminum, 316 Stainless Steel, Epoxy (Plastic)), SCA (316 Stainless Steel, Copper, Aluminum), and CSP (Copper, 316 Stainless Steel, Epoxy (Plastic)). Three techniques were used to coat the best performing CSP freeze-cast tubes: spray freezing (SF), spray coating (SC), and brush freezing (BF). The structure and density profile of the uncoated and coated tubes was quantified using X-ray microtomography and their functional gradients, and the resulting mechanical performance in bending were determined and compared. The structure-property-processing correlations determined for the coated and uncoated coaxially freeze cast tubular scaffolds offer strategies for the biomimetic design of bamboo-inspired porous tubes, which emulate bamboo's stiff outer shell supported by a porous, elastic inner layer to delay the onset of ovalization and failure, thereby increasing the tubes' mechanical efficiency.
Source: Data in Brief
Institutions: Dartmouth College, University of Freiburg, Northeastern University
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $500
Funders: National Science Foundation, National Aeronautics and Space Administration, Dartmouth College, Deutsche Forschungsgemeinschaft, National Institutes of Health, Norris Cotton Cancer Center, National Cancer Institute, Division of Civil, Mechanical and Manufacturing Innovation, Eunice Kennedy Shriver National Institute of Child Health and Human Development
Awards: A Nanotherapeutic Device for Effective Non-Surgical Female Sterilization, G149124214, G1830523874, G2788535355, G4031181835, G421379376, Collaborative Research: Modeling-Based Design of Freeze-Cast Hybrid Materials, DARTMOUTH S CONTRIBUTION TO THE TEAM EFFORT OF THE COLLABORATIVE NASA PROJECT ENTITLED STRUCTURE-PROPERTY-PROCESSING CORRELATIONS IN FREEZE-CAST BIOMIMETIC MATERIALS WILL BE TO INVESTIGATE AND DETERMINE WITH CUSTOM-DESIGNED FREEZING STAGES ANALYTICAL TOOLS AND CONTRIBUTIONS TO THE MODELING EFFORT THE KINETICS OF THE ICE-PHASE GROWTH AND THE MECHANISMS BY WHICH THE GROWING ICE-CRYSTALS THUS ICE PHASE TEMPLATES THE POLYMER PHASE DURING ITS TRANSITION FROM A SOLUTION TO A GLASSY SOLID. THE WATER-BASED SYSTEM WILL BE COMPARED WITH MODEL SYSTEMS SUCH AS THAT OF TBA-WATER: (I) WITH LIGHT MICROSCOPY PERPENDICULAR TO THE MOVING FREEZING FRONT WE WISH TO OBSERVE THE FORMATION OF MULLINS- SEKERKA INSTABILITIES AND THEIR SUBSEQUENT REORGANIZATION INTO AN ARRAY OF CELLS OR DENDRITES AS A FUNCTION OF POLYMER CONCENTRATION AND COOLING RATES WHICH IS EQUAL TO THE PRODUCT OF VELOCITY AND THERMAL GRADIENT IN DIRECTIONAL SOLIDIFICATION; (II) WITH CONFOCAL MICROSCOPY PARALLEL TO THE FREEZING FRONT WE WISH TO OBSERVE AND DETERMINE UNDER WHICH EXACT PROCESSING CONDITIONS SUCH AS POLYMER CONCENTRATION AND COOLING RATE THE DIFFERENT STRUCTURES FORM ON EARTH IN PREPARATION OF EXPERIMENTS USING THE REFURBISHED PFMI IN SPACE. FINALLY THE RESULTS OF THE EXPERIMENTAL AND THEORETICAL WORK WILL BE TRANSLATED INTO STRUCTURE-PROPERTY-PROCESSING CORRELATIONS FOR HIGHLY POROUS FREEZE-CAST MATERIALS (POLYMER CERAMIC METAL AND COMPOSITE) MADE ON EARTH SO THAT THEY CAN BE APPLIED IN THE DEVELOPMENT OF NEW AND IMPROVED FREEZE-CAST MATERIALS THAT ARE STRONG TOUGH AND LIGHTWEIGHT AND CAN BE CUSTOM-DESIGNED FOR A GIVEN APPLICATION. THE WORK EFFORT WILL PARALLEL THE FUNDING AND PHASE IN DURING YEARS 1 AND 2., G5090764095, G5466434173, EXC 2193: Lebende, adaptive und energieautonome Materialsysteme (livMatS), G7854435144, G7940003770, G9000325178, Cancer Center Support Grant
OpenAlex ID: W3036587947