Surface modification of aramid fibers by bio-inspired poly(dopamine) and epoxy functionalized silane grafting.
A novel biomimetic surface modification method for meta-aramid (MPIA) fibers and the improvement on adhesion with rubber matrix was demonstrated. Inspired by the composition of adhesive proteins in mussels, we used dopamine (DOPA) self-polymerization to form thin, surface-adherent poly(dopamine) (PDA) films onto the surface of MPIA fibers simply by immersing MPIA fibers in a dopamine solution at room temperature. An epoxy functionalized silane (KH560) grafting was then carried out on the surface of the poly(dopamine)-coated MPIA, either by a "one-step" or "two-step" method, to introduce an epoxy group onto the MPIA fiber surface. The surface composition and microstructure of the modified MPIA was characterized by X-ray photoelectron spectroscopy (XPS), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The results indicated successful grafting of KH560 on the PDA-coated MPIA surface. A single-fiber pull-out test was applied to evaluate the adhesion of MPIA fibers with the rubber matrix. Compared with the untreated MPIA fibers, the adhesion strength between the modified MPIA fibers by "one step" method with rubber matrix has an increase of 62.5%.
State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology , Beijing 100029, China.
Rina
R
Sa
Yan
Y
Yan
Zhenhai
Z
Wei
Liqun
L
Zhang
Wencai
W
Wang
Ming
M
Tian
D032701:Biomimetics; D004853:Epoxy Resins / Q000737:chemistry; D007211:Indoles / Q000737:chemistry*; D010973:Platelet Adhesiveness; D058105:Polymerization; D011108:Polymers / Q000737:chemistry*; D012821:Silanes / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties
D004853:Epoxy Resins; D007211:Indoles; C039578:Kevlar Aramid fibers; D011108:Polymers; D012821:Silanes; C568283:polydopamine
aramid fiber; aramid/rubber composite; dopamine; interfacial adhesion; silane; surface modification