I. Yu. Skvortsov, L. A. Varfolomeeva, A. F. Vashchenko, I. I. Ponomarev, T. D. Patsaev, A. Yu. Alentiev, V. G. Kulichikhin, “The first example of hollow polynaphthoylenebenzimidazole fiber preparation”, Mendeleev Commun., 2024, Volume 34, Issue 2,Pages <nobr>285

Communications

The first example of hollow polynaphthoylenebenzimidazole fiber preparation

I. Yu. Skvortsov^a, L. A. Varfolomeeva^a, A. F. Vashchenko^a, I. I. Ponomarev^b, T. D. Patsaev^c, A. Yu. Alentiev^a, V. G. Kulichikhin^a

^a A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Moscow, Russian Federation
^b A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Moscow, Russian Federation
^c National Research Centre 'Kurchatov Institute', Moscow, Russian Federation

Abstract: A new unique two-stage method for spinning hollow polynaphthoylenebenzimidazole (PNBI) fibers has been proposed. Polyacrylonitrile (PAN) fiber having a porous morphology was coated with poly(o-aminophenylene)- naphthoylenimide (PANI-O) precursor to form a composite fiber with a core–shell structure and subsequently this composite fiber precursor was heat treated in air. The inner PAN fiber underwent oxidative cyclization, accompanied by its high shrinkage, while the PANI-O shell, due to heterocyclization, turned into a PNBI-O shell, and the inner space of the hollow fiber was only partially filled with cyclized PAN.

Keywords: poly(o-aminophenylene)naphthoylenimide, polynaphthoylenebenzimidazole, hollow fiber, membrane, dry-wet spinning, core–shell structure.

Language: English

DOI: 10.1016/j.mencom.2024.02.041