Nano-silver/poly(2-acrylamido-2-methylpropanesulfonic acid-co-methyl methacrylate) (P(AMPS-MMA)) composite materials were prepared with the silver nitrate solution containing AMPS and MMA without initiator or reducer

in which Ag+ ion was reduced to nano silver particles

and the monomers were polymerizated simultaneously by ultrasonic.Transmission electron microscopy (TEM) showed that nanoAg particles were homogeniously dispersed in polymer martrix

and the size of particles was in the range of 5～15 nm.The results of Fourier transfer infrared spectrometer (FT-IR) suggested that the two characteristic peaks of the stretching vibration absorption peak of carbonyl at 1732 cm-1 and the stretching vibration asymmetric absorption peak of C—O—C of esters at 1191 cm-1 in the nanoAg/P(AMPSMMA) composite were shifted 13 cm-1 and 15 cm-1compared to those of the P(AMPS-MMA) copolymer respectively; The rusults of fluorescence spectra indicated that there were two emission peaks appeared in the vicinity of 318 and 393 nm for the aqueous solution of nano-Ag/P(AMPS- MMA) composites.The testing results of UV-Vis spectrum showed that there was a characteristic absorption peak at 417 nm for nanoAg/P(AMPSMMA) copolymer solution

the absorption peak of silver nanoparticles in the nanocomposites solution was shiftted to long wavelength with the ultrasonic time; X-ray photoelectron spectroseopy (XPS) proved that the O1s binding energy (531.7 eV) of CO and the O1s binding energy (533.4 eV) of C—O—C of nanocomposite copolymer reduced 0.4 eV and 0.5 eV respectively than the standards O1s binding energy (532.1 eV) of CO and 533.9 eV of C—O—C.The specific interaction between carbonyl. group in the composite copolymer and nano-Ag can be confirmed by the shift of the carbonyl C1s peak to lower binding energy.The interaction between nano silver and the functional group attached to polymer is considered to be of coordination.It is concluded that there is a kind of interaction phenomena of nanometal silver with effective polymer matrix in the nanocomposite materials.