High-temperature-resistant modified lignin epoxy resin and carbon fiber composite material thereof

• Main Authors: JIA YANGJIE, LIANG CHAO, GUO HONG, FANG PINWEN
• Format: Patent
• Language: Chinese; English
• Published: 09.03.2021
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

The invention discloses modified lignin epoxy resin which is prepared from the following raw materials in parts by mass: 90-100 parts of lignin epoxy resin, 1-10 parts of a modified intermediate and acatalyst, and the dosage of the catalyst is 0.1-1% of the mass of a reaction system, wherein the modified intermediate is prepared by melting and mixing enzymatic hydrolysis lignin and a SiO bond-containing compound and/or polyol phosphate. The addition of the modified intermediate introduces SiO bonds and P atoms with higher bond energy into the lignin epoxy resin structure, thereby enhancing the heat resistance of the lignin epoxy resin. Secondly, the invention provides a carbon fiber composite material, and the composite material is obtained by cross-linking and curing modified lignin epoxy resin and a carbon fiber material. Si-O bonds are good in flexibility, so that the toughness of the modified lignin epoxy resin can be enhanced, and finally, the mechanical property of the preparedcarbon fiber composite mat