title: New electrospinning nozzle to reduce jet instability and its application to manufacture of multi-layered nanofibers.
abstract: A new nozzle system for the efficient production of multi-layered nanofibers through electrospinning is reported. Developed a decade ago, the commonly used coaxial nozzle system consisting of two concentric cylindrical needles has remained unchanged, despite recent advances in multi-layered, multi-functional nanofibers. Here, we demonstrate a core-cut nozzle system, in which the exit pipe of the core nozzle is removed such that the core fluid can form an envelope inside the shell solution. This configuration effectively improves the coaxial electrospinning behavior of two fluids and significantly reduces the jet instability, which was proved by finite element simulation. The proposed electrospinning nozzle system was then used to fabricate bi- and tri-layered carbon nanofibers.
authors.affiliation: 1] Department of Materials Science and Engineering and Research Institute of Advanced Materials, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea [2] Samsung Advanced Institute of Technology, 130 Samsung-ro, Gyeonggi-do 443-803, Republic of Korea.
authors.forename: Byoung-Sun
authors.initials: BS
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering and Research Institute of Advanced Materials, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea.
authors.forename: Seung-Yeol
authors.initials: SY
authors.lastname: Jeon
authors.affiliation: Department of Materials Science and Engineering and Research Institute of Advanced Materials, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea.
authors.forename: Haedong
authors.initials: H
authors.lastname: Park
authors.affiliation: Department of Materials Science and Engineering and Research Institute of Advanced Materials, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea.
authors.forename: Geunsung
authors.initials: G
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering and Research Institute of Advanced Materials, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea.
authors.forename: Ho-Sung
authors.initials: HS
authors.lastname: Yang
authors.affiliation: Department of Materials Science and Engineering and Research Institute of Advanced Materials, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea.
authors.forename: Woong-Ryeol
authors.initials: WR
authors.lastname: Yu