Si-Al-C-O fiber preparation method

• Main Authors: CHU ZHAOJIE, LIU YUFU
• Format: Patent
• Language: Chinese; English
• Published: 01.01.2019
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; NATURAL OR ARTIFICIAL THREADS OR FIBRES; ORGANIC MACROMOLECULAR COMPOUNDS; SPINNING; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention provides a Si-Al-C-O fiber preparation method, and discloses a polyaluminocarbosilane preparation method, which comprises: uniformly mixing a polycarbosilane solution and an 8-hydroxyquinoline aluminum solution, carrying out a reaction for 0.5-2 h at a temperature of 230-300 DEGC under a pressure of 0.5-2 Mpa, and distilling. The invention further discloses a method for preparing Si-Al-C-O fiber by carrying out further treatment on the polyaluminocarbosilane prepared by the method. According to the present invention, the prepared aluminum-containing precursor has advantages of uniformity, controlled aluminum content, simple synthesis process and high safety compared to the precursor obtained through the normal pressure solid phase synthesis; the prepared aluminum-containing precursor has advantages of high softening point, good spinnability, high spinning stability and high yield after high temperature firing; and the prepared Si-Al-C-O fibers are smooth, black and bright, have characteristics o