Preparation method and application of high-flame-retardant heat-insulating sodium alginate composite aerogel

• Main Authors: ZHU XINBAO, FU BO, LIU JU, WANG CHENFEI, CHEN MUHUA, TANG YUJUN, LIU HAISONG, ZHAN HUANHUI
• Format: Patent
• Language: Chinese; English
• Published: 09.08.2024
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; 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 a preparation method and application of high-flame-retardant heat-insulating sodium alginate composite aerogel. The preparation method comprises the following steps: S1, dissolving APP in water, and stirring to obtain a flame-retardant solution A; dissolving MEL in water, and dropwise adding a PA solution to obtain a solution B; s2, dropwise adding the solution B into the flame-retardant solution A, reacting for 30 minutes, filtering the precipitate, centrifuging, washing with water, and grinding the dried product to obtain an AMP flame retardant; s3, dissolving an AMP flame retardant in water to obtain an AMP solution, and adding the sodium alginate solution into the AMP solution to form an SA-AMP mixed solution; s4, removing bubbles from the SA-AMP mixed solution through ultrasonic waves, and performing directional freezing and drying through liquid nitrogen to obtain SA composite aerogel; and S5, preparing a cross-linking solution by using a calcium chloride aqueous solution, ethano