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Open AccessArticle

Modification of Polyacrylonitrile Fibers by Coupling to Thiosemicarbazones

National Local Joint Engineering Laboratory for Advanced Textile Processing and Clean Production, Wuhan Textile University, Wuhan 430200, China
Hubei Provincial Engineering Laboratory for Clean Production and High-Value Utilization of Bio-based Textile Materials, Wuhan Textile University, Wuhan 430200, China
Authors to whom correspondence should be addressed.
Materials 2019, 12(23), 3980;
Received: 8 October 2019 / Revised: 27 November 2019 / Accepted: 28 November 2019 / Published: 30 November 2019
This work reports the modification of Polyacrylonitrile (PAN) fibers by coupling to thiosemicarbazones to achieve the biological activity for the applications in the food product packaging. After modification, seven thiosemicarbazone compounds were synthesized. The as-synthesized thiosemicarbazone compounds were bonded to PAN fibers via covalent coupling, which was confirmed using Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy. The mean graft efficiency of the compounds was about 1.92%, and the antibacterial efficiency was 88.6% and 45.1% against Staphylococcus aureus (S-aureus) bacteria. All the seven thiosemicarbazone compounds exerted excellent tyrosinase activity, low cytotoxicity, excellent metal ion chelation ability, and anti-bacterial behavior against both gram-positive and negative bacteria. The mechanical properties of the fibers have been maintained without significant damage after the chemical modification. The break strength test and elongation at the break test were done to measure the fracture strength of the modified fibers. Overall, the promising properties of the modified PAN fibers show potential applications in food packaging materials for fruits and vegetables, which require long-term anti-browning effects during their transportation and storage. View Full-Text
Keywords: PAN fiber; surface modification; tyrosinase inhibitor; thiosemicarbazone; covalent coupling PAN fiber; surface modification; tyrosinase inhibitor; thiosemicarbazone; covalent coupling
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Yao, Y.; Liang, Y.; Navik, R.; Dong, X.; Cai, Y.; Zhang, P. Modification of Polyacrylonitrile Fibers by Coupling to Thiosemicarbazones. Materials 2019, 12, 3980.

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