Surface Modification of Acrylonitrile Fibers and Membrane by Nitrilase from Escherichia Coli BL21 (DE3)/pET-Nit
The surface of polyacrylonitrile fibers and membrane were modified by nitrilase from Escherichia coli BL21 (DE3)/pET-Nit. Escherichia coli BL21(DE3)/pET-Nit was able to convert nitrile groups on PAN fibers and membrane to corresponding carboxylic acid as indicated by X-ray photoelectron spectroscopy (XPS). An increase of O/C atomic ratio on the fiber and membrane surface showed an increase in hydrophilicity and fabric-dyeing efficiency. Strength of treated fiber decreased by only 1.17%, because only surfacial nitrile groups of acrylic fibers were hydrolyzed by E.coli BL21(DE3)/pET-Nit.
Lun Bai and Guo-Qiang Chen
L. L. Feng et al., "Surface Modification of Acrylonitrile Fibers and Membrane by Nitrilase from Escherichia Coli BL21 (DE3)/pET-Nit", Advanced Materials Research, Vols. 175-176, pp. 651-655, 2011