Preparation method of PIPD (poly[2,6-diimidazo-(4,5-b:4'5'-e)pyridinylene-1,4-(2,5-dihydroxy)phenylene]) fiber

• Main Authors: FAN XINNIAN, HUANG ZHICHUAN, HU JUAN, RAN MAOQIANG, FU XINGWEI, XU WEI
• Format: Patent
• Language: English
• Published: 24.02.2016
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; BLEACHING LEATHER OR FURS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS,YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; LAUNDERING; MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS; NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING; TEXTILES; TREATMENT OF TEXTILES OR THE LIKE

The invention relates to a preparation method of PIPD (poly[2,6-diimidazo-(4,5-b:4'5'-e)pyridinylene-1,4-(2,5-dihydroxy)phenylene]) fiber and belongs to the technical field of preparation of high-performance fiber. The PIPD fiber is obtained through air gap stretching, cooling in a quenching chamber, phosphoric solution curing, washing, multi-level gradual drying, heat treatment and coiling of a PIPD/PPA (polyphthalamide) liquid crystal solution. According to the method, the drawing rate of as-spun fiber can be stably controlled; meanwhile, most of PPA in the as-spun fiber can be rapidly and effectively removed; moisture in the as-spun fiber of PIPD can be slowly removed, and high-performance PIPD fiber with a good structure is obtained.