Wet spun polyacrylontrile-based hollow fibers by blending with alkali lignin. (1st August 2018)

• Record Type: Journal Article
• Authors: Zhang, Bing; Lu, Chunxiang; Liu, Yaodong; Zhou, Pucha
• Is Part Of: Polymer. Volume 149(2018)
• Page Start: 294
• Page End: 304
• Publication Date: 2018-08-01
• Subjects: Alkali lignin (AL) -- Polyacrylonitrile (PAN) -- Hollow fiber -- Phase diagram -- Wet-spinning technique -- Blending; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; 547.7
• DOI: 10.1016/j.polymer.2018.07.019
• Languages: English
• ISSNs: 0032-3861

Abstract

Abstract: Alkali lignin, a by-product of commercialized paper making process, is an abundant and environmental-friendly material. In this paper, polyacrylontrile (PAN) -based hollow fiber was fabricated by one-step wet-spinning technique through blending with alkali lignin at different ratios. The phase diagram of the blends was determined by titration method. When alkali lignin is added into the PAN solution, the clouding points move away from polymer-DMSO axis, and miscibility gap increases. The phase separation of PAN was slowed down by mixing with alkali lignin which resulted in the formation of hollow structure and promoted the pore formation in the wall. This work clearly explains the roles that alkali lignin plays in the system consisting of polymer, solvent and nonsolvent, and provides a feasible method to produce PAN-based hollow fibers. Graphical abstract: Image 1 Highlights: PAN-based hollow fiber was fabricated by one-step wet-spinning technique through blending alkali lignin. Incorporating alkali lignin into the solution of PAN, the trend of phase diagram turned into delayed demixing. Incorporating alkali lignin into the solution of PAN resulted in the formation of hollow structure and promoted the pore forming in the wall.