TITLE:
Preparation and Characteristics of Novel Fibers Based on Cellulose Acetate and Soy Lecithin for Attracting and Binding POPs
AUTHORS:
Jinxian Huo, Zuopeng Li, Yin Wang
KEYWORDS:
Biomimic Material, Dry-Jet Wet Spinning, Accumulation, Persistent Organic Pollutants
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.3 No.10,
December
18,
2015
ABSTRACT: Soy lecithin (SL)-modified
cellulose acetate (L-CA) fibers for use as a novel biomimic material were
prepared by a dry-jet wet spinning process from a solution of the polymer in
dioxin. Characteristics of the L-CA fibers, such as structural properties, water
absorbance, electrical conductivity and accumulation of trace persistent
organic pollutants (POPs), were examined. Cross-sectional scanning electron
microscopy (SEM) of L-CA unveiled a finger-like structure, along with a thin
dense surface layer like that of CA. On the basis of X-ray photoelectron
spectroscopic (XPS) observations, it was concluded that the enhancement of
binding energy was optimum with 10% SL in the fiber, whereas superfluous SL led
to self-assembly between the SL molecules, which weakened the binding between
the SL and CA. Also, the L-CA fibers showed good water absorbance and a low
charge conductivity in comparison to that of the non-modified CA fibers.
Examination of the ability to accumulate POPs from water showed that L-CA is a
effective candidate for the removal of micropollutants from aqueous solution.