Method of using microwave to activate waste carbon fiber

• Main Authors: GUO, ZHAO-YIN, LI, JIAN, HE, CHENG-ZHUN
• Format: Patent
• Language: Chinese; English
• Published: 01.01.2014
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; COMPOSITIONS BASED THEREON; COMPOUNDS THEREOF; GENERAL PROCESSES OF COMPOUNDING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INORGANIC CHEMISTRY; METALLURGY; NATURAL OR ARTIFICIAL THREADS OR FIBRES; NON-METALLIC ELEMENTS; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SPINNING; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; THEIR RELEVANT APPARATUS; TRANSPORTING; WORKING-UP

The present invention provides a method of using microwave to activate waste carbon fiber, including the following steps: (a) mixing a waste carbon fiber and an activating agent with a solvent for preparing a treatment liquid, wherein the carbon fiber/activating agent ratio is in the range from 1:1 to 1:8; (b) subjecting the treatment liquid to microwave irradiation, wherein the microwave power is in the range from 600 W to 1000 W, and the microwave time is in the range from 40 minutes to 60 minutes; and (c) filtering and drying the treatment liquid after microwave irradiation for obtaining an activated carbon fiber. The present invention uses high power microwave irradiation and a high dose of activating agent to evenly and fast provide energy to carbon fiber, thereby capable of fast preparing an activated waste carbon fiber having excellent adsorption ability.