Study on spinnability of polyacrylonitrile solution based on dynamics simulation of dry-jet wet spinning

2018 ◽  
Vol 135 (25) ◽  
pp. 46377
Author(s):  
Jianning Wang ◽  
Tao Wang ◽  
Jing Xu ◽  
Jinchao Yu ◽  
Yumei Zhang ◽  
...  
Keyword(s):  
Dynamics Simulation ◽  
Wet Spinning ◽  
Polyacrylonitrile Solution

Increasing washing performance of wet-spun fibers

2016 ◽  
Vol 28 (3) ◽  
pp. 293-299 ◽  
Author(s):  
Musa Akdere ◽  
Sascha Schriever ◽  
Gunnar Seide ◽  
Thomas Gries
Keyword(s):  
Fiber Bundle ◽  
Particle Image ◽  
Lightweight Design ◽  
Dynamics Simulation ◽  
Wet Spinning ◽  
Content Type ◽  
Washing Process ◽  
Image Velocimetry ◽  
Spinning Process ◽  
Solvent Transport

Purpose – The wet-spinning process is very important for the development and production of new lightweight design materials. The washing process is determined as one of the most cost-expensive part of wet spinning. The purpose of this paper is to show the development of a new washing concept. It proposes to increase the washing performance by decreasing fiber-fiber-interfaces during the washing process. Design/methodology/approach – For this purpose, conventional washing concepts are investigated by means of simulations and experiments to obtain process knowledge. Computational fluid dynamics simulation and particle image velocimetry measurements are used to investigate the process. Findings – The overall deficit in conventional washing methods is the large number of fiber-fiber-interfaces, which inhibit the solvent transport out of the compact fiber bundle. Therefore, a new washing concept with included water nozzles is developed. Based on the simulations and observations it is found that the arrangement of the nozzles has direct influence on the fanning of the fiber bundle. Originality/value – With increased fanning of the fiber bundle a more efficient solvent transport is expected. The developed washing box is a prosperous concept to achieve a higher washing performance during the wet-spinning process. The variable design of the washing box makes it possible to test different nozzle configurations and designs. In this paper the two most promising nozzle arrangements are shown and compared to each other.

Preparation of Phytic Acid Modified Polyurethane Wet Spinning Fibers for Application in Pb2+ Adsorption

2019 ◽  
Vol 35 (4) ◽  
pp. 497-506 ◽  
Author(s):  
YINCHUN FANG ◽  
◽  
XINHUA LIU ◽  
XIAO WU ◽  
XUCHEN TAO ◽  
...  
Keyword(s):  
Phytic Acid ◽  
Wet Spinning
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