Fabrication of polyamide-6 fiber of high SO3H content surface through electrospinning

Published Date
19 August 2016, Vol.98:11–19, doi:10.1016/j.polymer.2016.05.072

Title 

Fabrication of polyamide-6 fiber of high SO₃H content surface through electrospinning

• Author 

• Dandan Zhang ^a
• Dongqing Liu ^a,b,,
• Qingjuan Ren ^a
• Yingbo Chen ^a
• Cuiyu Yin ^a,

• aSchool of Material Science and Engineering, State Key Laboratory of Separation Membranes and Membrane Processes, Institute of Functional Fibers, Tianjin Polytechnic University, Tianjin, 300387, China
• bYiwu Huading Nylon Co., Ltd., Jinhua, Zhejiang, 322000, China

Received 8 December 2015. Revised 6 May 2016. Accepted 28 May 2016. Available online 2 June 2016.

Highlights

• •
  The copolymer of 5-sulphosalicylic acid/ε-caprolactam was prepared and electrospun.
• •
  SO₃H groups increased conductivity of electrospun polymer solution and further influenced the morphology of SPA6s fibers.
• •
  Direction of electric field and material quality of collector could influence the morphology of electrospinning fibers.
• •
  SO₃H groups were inclined to distribute over the surface of SPA6s fibers through electrospun process.

Abstract

Benzenesulfonic group containing polyamide-6 (PA6) were fabricated through melting polymerized using ε-caprolactam and different proportions of 5-sulphosalicylic acid (5SA). The physicochemical properties of SO₃H containing PA6s (SPA6) were determined through FT-IR spectroscopy, TGA and DSC. The morphology of electrospinning fibers of SPA6s were investigated by FE-SEM. Fiber diameters increased with 5SA, and the polymer became un-electrospinnable as 5SA up to 5 wt%. Solution conductivity was a crucial factor for the spinnability of polyelectrolyte. Direction of electric field and material quality of collector could also influence the electrospinning of polyelectrolyte. Sulfonic groups preferred to distribute over the surface of fibers during electrospinnning process comparing to melting spinning, which could render fiber surface more hydrophilic.

Graphical abstract

SO₃H groups increased conductivity of electrospun polymer solution, which further influenced the morphology of SPA6s fibers. Direction of electric field and material quality of collector could influence the morphology of electrospinning fibers. SO₃H groups were inclined to distribute over the surface of SPA6s fibers through electrospun process.

Keywords

• Polyamide-6
• Electrospinning
• Polar group
• 5-Sulphosalicylic acid

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• ∗ 
  Corresponding author. School of Material Science and Engineering, State Key Laboratory of Separation Membranes and Membrane Processes, Institute of Functional Fibers, Tianjin Polytechnic University, Tianjin, 300387, China.
• ∗∗ 
  Corresponding author.

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