Fabrication of Ultrahigh‐Strength Polybenzimidazole Fibers via a Novel and Green Integrated Liquid Crystal Spinning Process. Issue 3 (17th February 2020)

• Record Type: Journal Article
• Authors: Sun, Guohua; Zhang, Mengying; Chen, Nanjun; Niu, Hongqing; Qi, Shengli; Wu, Dezhen
• Is Part Of: Macromolecular materials and engineering. Volume 305:Issue 3(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-02-17
• Subjects: flame retardancy -- liquid‐crystal spinning -- PBI fibers -- polycondensation -- ultrahigh strength fibers; Plastics -- Periodicals; Polymers -- Periodicals; Polymerization -- Periodicals; 547.705
• DOI: 10.1002/mame.201900717
• Languages: English
• ISSNs: 1438-7492

Abstract

Abstract: Herein, the first example of ultrahigh‐strength polybenzimidazole (PBI) fibers using a PBI solution in liquid crystal state is reported via a novel and green integrated spinning technology. Microwave‐assisted polycondensation is utilized to synthesize the polybenzimidazole/polyphosphoric acid liquid crystal spinning solution and pure water is employed as the coagulating and washing bath to afford a green fabrication process. The green integrated spinning technology is eco‐friendly, cheap, and conducive for the large‐scale production of PBI fibers. The as‐prepared PBI fibers display superb flame retardancy, and the outstanding thermal stability of PBI fiber enables it to preserve structural integrity at temperatures as high as 600 °C. More significantly, it prepared the ultrahigh‐strength of PBI fiber up to 0.91 GPa, which is two times than that of the reported PBI fibers, marking a significant breakthrough for the high‐performance PBI fibers. Abstract : Ultrahigh strength polybenzimidazole (PBI) fibers are successfully fabricated using the PBI solution in a liquid crystal state via a novel and green integrated spinning technology.