Research on the self-assembly and application of liquid crystal polymer poly (p-phenylene terephtalamide)

Poly (p-phenylene terephtalamide) (PPTA) is a kind of lyotropic liquid crystal polymer. Fiber material consisted of oriented PPTA molecules has excellent mechanical strength and is necessary in many important areas. However, the poor processability of PPTA due to its non-melting and insoluble characteristics seriously limits the expansion of PPTA application. Self-assembly of PPTA into nanofibers and further processing the nanofibers into macroscopic materials is an effective strategy to solve the problem of PPTA processing. This paper briefly reviews the self-assembly methods of PPTA in recent years, and mainly introduced the fabrication of different kinds of macroscopic materials from monomers through the combination of in-situ self-assembly and other self-assembly methods. This multi-level self-assembly strategy realizes the processing of liquid crystal polymer PPTA, enrich the product variety, and is expected to be applied to the self-assembly of other liquid crystal polymers.