Optimization of Electrical and Mechanical Properties through the Adjustment of Design Parameters in the Wet Spinning Process of Carbon Nanotube/Polyvinylidene Fluoride Fibers Using Response Surface Methodology

Chan-Woong Choi; Ji-Won Jin; Ki-Weon Kang

doi:10.3390/polym15143090

Optimization of Electrical and Mechanical Properties through the Adjustment of Design Parameters in the Wet Spinning Process of Carbon Nanotube/Polyvinylidene Fluoride Fibers Using Response Surface Methodology

Polymers (Basel). 2023 Jul 19;15(14):3090. doi: 10.3390/polym15143090.

Authors

Chan-Woong Choi¹, Ji-Won Jin², Ki-Weon Kang³

Affiliations

¹ Department of Green Mobility R&D, Jeonbuk Institute of Automotive Convergence Technology, Gunsan 54158, Republic of Korea.
² Korea Testing Laboratory, System Verification and Validation Center, Seoul 08389, Republic of Korea.
³ Department of Mechanical Engineering, Kunsan National University, Gunsan 54150, Republic of Korea.

Abstract

The optimal process conditions for fabricating carbon nanotube (CNT)/polyvinylidene fluoride (PVDF) fibers with varying properties using a wet spinning process were experimentally determined. A dope solution was prepared using multi-walled nanotubes, PVDF, and dimethylacetamide, and appropriate materials were selected. Design parameters affecting the chemical and physical properties of CNT/PVDF fibers, such as bath concentration, bath temperature, drying temperature, and elongation, were determined using a response surface method. The wet-spinning conditions were analyzed based on the tensile strength and electrical conductivity of the fibers using an analysis of variance and interaction analysis. The optimized process conditions for fabricating CNT/PVDF fibers with different properties were derived and verified through fabrication using the determined design parameters.

Keywords: CNT/PVDF fiber; analysis of variance; carbon nanotube; central composite design (CCD); electrical conductivity; multiple properties; polyvinylidene fluoride; response surface method (RSM); tensile strength; wet spinning.

Grants and funding

This work was supported by Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea Government (MOTIE) (20224000000040) and supported by Korea Agency for Infrastructure Technology Advancement (KAIA) grant funded by the Ministry of Land, Infrastructure and Transport (22LTSM-B156015-03).