Water‐resistant modification of poly(vinyl alcohol)/polyamidoxime chelating fibers prepared by emulsion spinning and their adsorption properties. Issue 25 (6th March 2017)

• Record Type: Journal Article
• Authors: Song, Yongjiao; Zhang, Xianghan; Ye, Guangdou; Xu, Jianjun; Jiang, Mengjin
• Is Part Of: Journal of applied polymer science. Volume 134:Issue 25(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-03-06
• Subjects: adsorption -- DMDHEU -- formalization -- polyamidoxime -- poly(vinyl alcohol); Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.44965
• Languages: English
• ISSNs: 0021-8995

Abstract

ABSTRACT: The poly(vinyl alcohol)/polyacrylonitrile (PVA/PAN) precursor fiber prepared by emulsion spinning was separately crosslinked with dimethyloldihydroxyethyleneurea (DMDHEU), formaldehyde (FA), and both DMDHEU and FA for preparing PVA/polyamidoxime (PAO) chelating fibers with elevated water‐resistance. Effects of different crosslinking systems on the properties of the composite amidoxime chelating fibers have been investigated. Results show that FA treatment can effectively increase the water‐resistance of composite fiber, but would dramatically decrease the adsorption properties of composite fiber. Conversely, DMDHEU treatment has inferior effects on the water‐resistance of the composite fiber, but would impressively increase the adsorption properties of composite fiber. The composite fiber treated with both DMDHEU and FA could reach good overall performances (water contact angle: 94.83°; soft point in hot water: 116 °C; breaking strength in dry condition: 441.80 MPa; the maximum adsorption capacities of precious ions: 1207.66 and 653.59 mg Ag g −1 ). © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2017, 134, 44965. Abstract :