Rheological behavior and fiber spinning of polyacrylonitrile (PAN)/Carbon nanotube (CNT) dispersions at high CNT loading

Lu, Mingxuan; Liao, Jianshan; Gulgunje, Prabhakar V.; Chang, Huibin; Arias-Monje, Pedro J.; Ramachandran, Jyotsna; Breedveld, Victor; Kumar, Satish

doi:10.1016/j.polymer.2020.123369

Title: Rheological behavior and fiber spinning of polyacrylonitrile (PAN)/Carbon nanotube (CNT) dispersions at high CNT loading

Journal Article · Thu Dec 31 00:00:00 EST 2020 · Polymer

DOI:https://doi.org/10.1016/j.polymer.2020.123369· OSTI ID:1851845

Lu, Mingxuan ^[1]; Liao, Jianshan ^[2]; Gulgunje, Prabhakar V. ^[3]; Chang, Huibin ^[4];

^[3]; Ramachandran, Jyotsna ^[3]; Breedveld, Victor ^[2]; Kumar, Satish ^[3]

Georgia Institute of Technology, Atlanta, GA (United States). School of Chemical and Biomolecular Engineering
Georgia Institute of Technology, Atlanta, GA (United States). School of Chemical and Biomolecular Engineering; Georgia Institute of Technology, Atlanta, GA (United States). Renewable Bioproducts Inst.
Georgia Institute of Technology, Atlanta, GA (United States). School of Materials Science and Engineering
Georgia Institute of Technology, Atlanta, GA (United States). School of Materials Science and Engineering; Georgia Institute of Technology, Atlanta, GA (United States). Renewable Bioproducts Inst.

Rheological studies play an important role in polymer processing including fiber spinning. In the current work, rheological behavior has been studied for polyacrylonitrile (PAN)/carbon nanotube (CNT) dispersions in dimethyl formamide (DMF), where CNT loading is as high as 15 wt% of the total solids (polymer + CNT). The presence of CNTs increased the elastic-like and shear thinning behavior of the dispersions. The terminal slope of the log G' versus log G" curve, which was used to characterize the homogeneity of solution or dispersion, is dependent on the CNT concentration but independent of temperature between 0 and 60 °C. PAN/CNT-10 (90 wt% PAN +10 wt% CNT) and PAN/CNT-15 were gel spun at different conditions, with small diameter capillary at high shear rate and large diameter capillary at relatively low shear rate. Additionally, for PAN/CNT-10, fiber spinning with lower molecular weight polymer showed increased continuous jetting time when compared to spinning with higher molecular weight polymer. In addition, the rheological behavior of PAN/cellulose nanocrystal (CNC) dispersion with 20–60 wt% CNC was also compared to that of the PAN/CNT dispersions. PAN/CNC and PAN/CNT share similarities in both rheological behavior and fiber spinning at high filler loading.

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Research Organization:: Vuronyx Technologies, LLC, Woburn, MA (United States)

Sponsoring Organization:: USDOE Office of Science (SC); US Air Force Office of Scientific Research (AFOSR)

Grant/Contract Number:: SC0013743; FA 9550-14-1-0194

OSTI ID:: 1851845

Alternate ID(s):: OSTI ID: 1776186

Journal Information:: Polymer, Vol. 215, Issue C; ISSN 0032-3861

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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