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Hierarchical cellular scaffolds fabricated via direct foam writing using gelled colloidal particle‐stabilized foams as the ink
Author(s) -
Ren Bo,
Liu Jingjing,
Wang Yali,
Chen Yugu,
Gan Ke,
Rong Yedong,
Yang Jinlong
Publication year - 2019
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16543
Subject(s) - materials science , porosity , composite material , particle (ecology) , viscoelasticity , modulus , colloid , nanotechnology , chemical engineering , oceanography , engineering , geology
Hierarchical cellular architectures hold great potential in a vast range of applications due to their superior mechanical properties and multifunctionality. In the present work, hierarchical structures composed of porous struts patterned in the form of quadrangular and triangular honeycombs were fabricated via direct foam writing (DFW) using colloidal particle‐stabilized Al 2 O 3 ‐MgO‐SiO 2 foams as the ink. Hydration process of MgO and subsequent formation of colloidal Mg(OH) 2 network endowed the foam ink with viscoelasticity and high storage modulus. The resulting honeycombs with ultrahigh overall porosity (95.3%) and robust compressive strength (2.5 MPa) can be readily fabricated by DFW. The current work exhibits a significant step toward the scalable production of cellular ceramics with hierarchical architecture for various applications, including tissue scaffolds, catalyst supports, thermal insulation, and lightweight structures.