Monosized nanoparticles of 57.3 nm were prepared by cationic emulsion polymerization using a polymerizable emulsifier DMHB.The adsorption of nanoparticles onto bamboo fibers was measured by conductometric titration.The results indicated that the adsorption capacity increased with increasing contact time until 120 min.The equilibrium data for nanoparticles adsorption onto bamboo fibers were well fitted to the Langmuir equation.Moreover,the monolayer adsorption capacity of nanoparticles in the concentration range(from 0.03 g/L to 0.6 g/L) studied,as calculated from Langmuir isotherm model at 25 C,was found to be 38.61 mg/g of fibers.The SEM images showed that the nanoparticles form a uniform monolayer on bamboo fiber surfaces. Monosized nanoparticles of 57.3 nm were prepared by cationic emulsion polymerization using a polymerizable emulsifier DMHB. The adsorption of nanoparticles onto bamboo fibers was measured by conductometricometric titration. The results indicated that the adsorption capacity increased with increasing contact time until 120 min. The equilibrium data for nanoparticles adsorption onto bamboo fibers were fitted to the Langmuir equation. Moreover, the monolayer adsorption capacity of nanoparticles in the concentration range (from 0.03 g / L to 0.6 g / L) was calculated from Langmuir isotherm model at 25 C, was found to be 38.61 mg / g of fibers. The SEM images showed that the nanoparticles form a uniform monolayer on bamboo fiber surfaces.