Self-adhesive tough silver/lignin hydrogel and preparation method thereof

• Main Authors: CHEN RIQING, CHU FUXIANG, WANG DINGKUN, NAN JINGYA, WANG CHUNPENG
• Format: Patent
• Language: Chinese; English
• Published: 11.11.2022
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

The preparation method of the self-adhesive tough silver/lignin hydrogel comprises the following steps that (1) under the stirring condition, ammonia water is dropwise added into a silver nitrate solution, and a silver-ammonia solution is formed; (2) under the condition of stirring, blending the lignin solution and the silver-ammonia solution, and standing to form a lignin/silver-ammonia solution; and (3) adding a carboxyl-containing compound, a monomer, the lignin/silver ammonia solution and a cross-linking agent into deionized water, mixing, adding an initiator after ultrasonic treatment, and polymerizing to obtain the silver/lignin hydrogel. The silver/lignin hydrogel is prepared by adopting a complex formula method, and the preparation process is simple and easy to implement; a lignin/Ag < + > redox catalytic system is adopted, gelling can be performed at 25 DEG C, additional light and heat initiation is not needed, and the preparation process is green and environment-friendly; the silver/lignin hydrogel