High-temperature-resistant anti-radiation elastic silicon carbide nanofiber aerogel material and preparation method thereof

• Main Authors: LI WENJING, LIU YUANYUAN, HE LIJUAN, HUANG HONGYAN, ZHANG WANLIN
• Format: Patent
• Language: Chinese; English
• Published: 01.11.2022
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; NATURAL OR ARTIFICIAL THREADS OR FIBRES; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SPINNING; TEXTILES; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention relates to a high-temperature-resistant anti-radiation elastic silicon carbide nanofiber aerogel material and a preparation method thereof.The method comprises the steps that polycarbosilane, a macromolecule thickening agent, a ferrocene compound and an organic solvent are mixed to be uniform, a nanofiber precursor mixed solution is obtained, electrostatic spinning is conducted on the nanofiber precursor mixed solution, and the high-temperature-resistant anti-radiation elastic silicon carbide nanofiber aerogel material is obtained; a fiber material obtained through electrostatic spinning is subjected to pre-oxidation treatment and high-temperature pyrolysis, and silicon carbide nanofibers are obtained; the preparation method comprises the following steps: uniformly mixing silicon carbide nanofibers, water, an infrared opacifying agent, a binder, a foaming agent and graphene oxide to obtain an aerogel precursor mixed solution, and then sequentially carrying out pre-freezing, freeze-drying and the