Mesporous 3C-SiC Hollow Fibers

Abstract

In the present work, for the first time, we reported the exploration of mesoporous 3C-SiC hollow fibers via single-spinneret electrospinning of polyureasilazane (PSN) and polyvinylpyrrolidone (PVP) solution followed by high-temperature pyrolysis treatment. The resultant products were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM) and N2 adsorption. The as-prepared hollow fibers with totally mesoporous walls were uniformly sized in diameter and high purity in morphology. They were composed of single-crystalline 3C-SiC nanoparticles with a surface area of 21.75 m2/g and average pore diameter of ~34 nm. The PSN concentration played a determined role on the formation of hollow fibers rather than the conventional solid counterparts, enabling their growth in a tunable manner. A possible mechanism was proposed for the formation of mesoporous SiC hollow fiber.

Reaction-Spun Transparent Silica Aerogel Fibers

“…Thermal protection in harsh environments is of fundamental importance for human beings, and materials have been developed from hides, bark and leaves in ancient times to natural fibers which are obtainable from animal, vegetable, or mineral sources for centuries, and now to various synthetic fibers and fabrics. , Recent achievements on synthetic fibers provide more exciting opportunities toward better thermal protection and management. For example, hollow fibers, − biomimetic porous fibers, , and ultrafine fibers have shown advantages in thermal insulation over natural fibers, whereas the demand for more efficient thermal insulation fibers is still growing fast. For such a purpose, the forthcoming fibers should be as porous as possible, with an ultralow mass density and large porosity.…”

Enhancing Heat Transfer Behaviour of Ethylene Glycol by the Introduction of Silicon Carbide Nanoparticles: An Experimental and Molecular Dynamics Simulation Study

“…XRD characterisation of SiC was detected in Figure 1 c. Five prominent characteristics peaks were noted at the two theta of approximately 35.4, 40.05°, 60.12°, 71.9° and 75.8°, which can be ascribed to the (111), (200), (220), (311), and (222) crystal face of SiC phase and is highly in line with the results of JCPDS, No. 29–1129 [ 37 ]. The XRD results confirmed the high purity of the SiC nanoparticles used in this study.…”

Fluorinated peptide biomaterials

“…Completely hollow supramolecular architectures, typically produced from silicon carbide or graphene, [89][90][91] have also been reported via the self-assembly of short fluoropeptides. Building upon their earlier work on αγα-tripeptides, Burade et al have reported fluorinated sugar amino acid derived α,γ-cyclic tetra-and hexapeptides that adopt symmetric flat oval-and triangular-ring shaped β-strands.…”

“…Completely hollow supramolecular architectures, typically produced from silicon carbide or graphene, [ 89–91 ] have also been reported via the self‐assembly of short fluoropeptides. Building upon their earlier work on αγα‐ tripeptides, Burade et al .…”