Journal
CERAMICS INTERNATIONAL
Volume 49, Issue 6, Pages 10172-10175Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2022.12.081
Keywords
Grain growth (A); Interfaces (B); Nanocomposites (B); Shaping (A); Oriented attachment; Electrospinning
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By mixing MgO nanoparticles with polyvinylalcohol (PVA), fiber structures with layered Mg(OH)2 nanosheets can be produced. Upon high-temperature calcination, the Mg(OH)2 nanosheets undergo dehydration, along with the removal of the polymer, resulting in staggered MgO nanoparticle ensembles in the fibers. Using methanol as a solvent in polyvinylpyrrolidone (PVP) fibers, the crys-tallinity and structure of MgO nanoparticles are preserved, forming nanoparticle threads with a cylindrical profile and particle size gradient after calcination.
For electrospinning of MgO nanoparticle-based fiber architectures, we exploit the intermediate formation of layered Mg(OH)2 nanosheets that form inside polyvinylalcohol (PVA) based fibers during nanoparticle-polymer formulation. Upon calcination, Mg(OH)2 nanosheets undergo a topotactic dehydration reaction. In conjunction with polymer removal, these sheets generate staggered MgO nanoparticle ensembles that comprise flat ribbons. With methanol as a solvent and in polyvinylpyrrolidone (PVP) fibers, the MgO nanoparticles retain their crys-tallinity and structure inside the electrospun fibers. After calcination, they form nanoparticle threads with a cylindrical profile and particle size gradient.
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