Enzyme-Mediated Grafting of AGE to Kevlar Fiber using Horseradish Peroxidase

The research is the reaction of the high-performance fiber Kevlar grafted allyl glycidylether (AGE),in the process,we use the horseradish peroxidase (HRP) as the catalyst, H2O2 as the oxidant of free radicals initiator system The grafted fiber was made to do the following performance tests: element analysis, infrared, SEM, XRD, TG, Contact Angle, tensile strength, be pull out by monofilament. We can see from the infrared spectra, the peak of the grafted fiber in 1510 cm(-1) and 1250 cm(-1) increase apparently, it shows that the AGE has been grafted. There are new peaks in 760 cm(-1) and 690 cm(-1), proved the grafted position is in benzene rings; from the SEM,we know the surface roughness of the grafted fiber increase apparently; the test result of TG showed the Y-c increased regularly, both of them prove the succession of the grafting, moreover, the fiber also has the good thermal stability after grafted; the contact angle has been reduced from 80 to 60, shows the content of fiber surface polar groups has been increased, enhance the wettability significantly; the monofilament pull out test shows after grafting the adhesion between the Kevlar fiber and the epoxide resin matrix has been improved.