Preparation, characterizations and properties of sodium alginate grafted acrylonitrile/polyethylene glycol...

In this work, to improve the spinnability of sodium alginate, potassium persulfate (KPS) was used as initiator, SA was modified with acrylonitrile (AN) to prepare sodium alginate-polyacrylonitrile copolymer (SA-g-AN), and SA-g-AN/PEG composite solutions were prepared by blending SA-g-AN and polyethylene glycol (PEG) as spinning solution to prepare corresponding electrospun nanofibers. The chemical structure and thermal stability of SA-g-AN were characterized by infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC). The physical properties of SA-g-AN and SA-g-AN/PEG spinning solution were determined by viscometer, surface tension meter and electrical conductivity meter, the morphology of SA-g-AN and SA-g-AN/PEG electrospun fibers were observed by scanning electron microscopy (SEM). And the oil-water separation performance and water resistance of SA-g-AN electrospun fibers were also investigated. The results revealed that: the graft modification of acrylonitrile significantly improved the electrospinnability of sodium alginate. The water-resistance of modified graft copolymer was improved as well as the thermal stability, and the electrospun nanofibers had a uniform morphology and stable oil-water separation performance.