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Synchronous preparation method of silicon carbide fibers and silicon nitride nanofibers
The invention relates to a synchronous preparation method of silicon carbide fibers and silicon nitride nanofibers, which comprises the following steps: splitting PDMS (Polydimethylsiloxane) in an inert atmosphere to obtain LPS (Lipopolysaccharide); the preparation method comprises the following steps: uniformly mixing LPS and ferrocene in an inert atmosphere, and carrying out a heating reaction to obtain PFCS after the reaction is completed; carrying out melt spinning under the protection of inert atmosphere to obtain PFCS fibril; carrying out non-melting treatment in air to obtain PFCS pre-oxidized fibers; carrying out electron beam irradiation crosslinking treatment in an inert atmosphere to obtain PFCS crosslinked fibers; and placing the PFCS cross-linked fiber in a graphite paper tube, and cracking in a nitrogen atmosphere. According to the preparation method, polyferrocarbosilane is taken as a precursor, and through melt spinning, low-oxygen air non-melting, electron beam irradiation crosslinking and high-temperature inorganic treatment in a nitrogen environment, the SiC fiber is successfully prepared, and meanwhile, the Si3N4 nanofiber is synchronously prepared; compared with respective preparation, the method is simpler and more efficient.
一种碳化硅纤维和氮化硅纳米纤维的同步制备方法，包含以下步骤：将PDMS在惰性气氛下裂解，得LPS；将LPS与二茂铁在惰性气氛下混合均匀并加热反应，反应完成后得PFCS；在惰性气氛保护下熔融纺丝，得PFCS原纤维；在空气中进行不熔化处理，得PFCS预氧化纤维；在惰性气氛下电子束辐照交联处理，得到PFCS交联纤维；将PFCS交联纤维置于石墨纸筒中，在氮气气氛下裂解，即成。本发明以聚铁碳硅烷为先驱体，通过熔融纺丝、低氧空气不熔化、电子束辐照交联、氮气环境中的高温无机化处理，在成功制备SiC纤维的同时，同步制备出了Si3N4纳米纤维；相比分别制备，本发明方法更为简洁高效。
Synchronous preparation method of silicon carbide fibers and silicon nitride nanofibers
The invention relates to a synchronous preparation method of silicon carbide fibers and silicon nitride nanofibers, which comprises the following steps: splitting PDMS (Polydimethylsiloxane) in an inert atmosphere to obtain LPS (Lipopolysaccharide); the preparation method comprises the following steps: uniformly mixing LPS and ferrocene in an inert atmosphere, and carrying out a heating reaction to obtain PFCS after the reaction is completed; carrying out melt spinning under the protection of inert atmosphere to obtain PFCS fibril; carrying out non-melting treatment in air to obtain PFCS pre-oxidized fibers; carrying out electron beam irradiation crosslinking treatment in an inert atmosphere to obtain PFCS crosslinked fibers; and placing the PFCS cross-linked fiber in a graphite paper tube, and cracking in a nitrogen atmosphere. According to the preparation method, polyferrocarbosilane is taken as a precursor, and through melt spinning, low-oxygen air non-melting, electron beam irradiation crosslinking and high-temperature inorganic treatment in a nitrogen environment, the SiC fiber is successfully prepared, and meanwhile, the Si3N4 nanofiber is synchronously prepared; compared with respective preparation, the method is simpler and more efficient.
一种碳化硅纤维和氮化硅纳米纤维的同步制备方法，包含以下步骤：将PDMS在惰性气氛下裂解，得LPS；将LPS与二茂铁在惰性气氛下混合均匀并加热反应，反应完成后得PFCS；在惰性气氛保护下熔融纺丝，得PFCS原纤维；在空气中进行不熔化处理，得PFCS预氧化纤维；在惰性气氛下电子束辐照交联处理，得到PFCS交联纤维；将PFCS交联纤维置于石墨纸筒中，在氮气气氛下裂解，即成。本发明以聚铁碳硅烷为先驱体，通过熔融纺丝、低氧空气不熔化、电子束辐照交联、氮气环境中的高温无机化处理，在成功制备SiC纤维的同时，同步制备出了Si3N4纳米纤维；相比分别制备，本发明方法更为简洁高效。
Synchronous preparation method of silicon carbide fibers and silicon nitride nanofibers
一种碳化硅纤维和氮化硅纳米纤维的同步制备方法
WANG HAO (author) / ZHANG YUJIE (author) / CHENG HONGMEI (author) / MA ZHONGLIE (author) / MA SHENG (author) / CHEN SONG (author) / ZENG YI (author)
2023-12-12
Patent
Electronic Resource
Chinese
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