The Preparation And Interface Study Of IPN/Ni Composite LB Films

The composite of polymer and metal is widely used in the industry fields for its super properties; meanwhile, the composites of polymer and metal consisting of both science research and technology applications have a very high value because the great difference between the physical and chemical nature of the existence. This work use the LB technology to prepare IPN / Ni composite, then use the spectrum of modern technology to test and character the interface of polymer and metal, according to the results and then study the bonding mechanism.With the coefficients of solution concentration of 0.2μmols·L-1, barrier speed at 6mm·min-1, temperature at 23.0℃, still time 60 of min, pH value of 7.32, spreading volume of 90μL, transfering pressure of 43mN·m-1～45mN·m-1, lifting speed at 5mm·min-1～7mm·min-1 LB films of stearic acid and nickel have be prepared. After the reduction treatment, the stearic acid produces since the disappearance of 1689 cm-1 (stearic acid nickel film) in IR absorption peak. Further reduction and dissolvation make organic phase away from the substrate. Atomic force images indicates that solution through reduction and dissolvation, the long-chain fatty acid become small particles in AFM photographs. After the stearic acid is dissolved in solution, the metal atomic particles leaves alone.Composite LB films have been prepared using IPN polymer-coated substrate, with the coefficient of transfering pressure of 46.5mN·m-1, lifting speed up at 6mm·min-1and down at 3mm·min-1. Atomic force images indicates that the surface of IPN smoothly and after treatment, the surface unsmoothly obviously. IR spectrua show that the -N=C=O of long-chain IPN disappeas and O carbonyl peaks of carbamate group moves. The coverage of Ni layer to carbamate results in the provide of pair of electrons of N to Ni. X-ray photoelectron spectroscopy analysis to the outer layer of composite, show that N in the carbamate group and O in carbonyl group of the stearic acid to the Ni to coordinae. In the inner layer of N, the N in carbamate provides pairs of electron to Ni to coordinate.