of many surface chemists. The polymer surfaces display a Adsorption from aqueous solutions of mixtures of surfactants different kind of surface chemistry due to their low surface of cetyl trimethyl ammonium bromide (CTAB) and nonyl phenyl energy and inertness. Among the various polymers poly tetra ethoxylates (NP 0 n) (n Å 13, 20, 30) on PTFE was studied in fluoroethylene (PTFE) surfaces which possess both hydroa wide concentration range. The adsorption of CTAB was enphobicity and oleophobicity are of particular interest both hanced by the presence of nonionic surfactants and vice versa in academically and industrially. PTFE is extensively used as the pre-CMC region due to chain-chain interactions. The decrease biomaterial as also in several other applications where chemin adsorption level of CTAB with an increase in mole fraction of ical inertness is desirable. The initial interest in the adsorpnonionic surfactants in the region above the CMC has been attribtion of surfactants on PTFE and other polymers was in relauted to the decrease in monomer concentration due to mixed micellization with nonionic surfactants. In the case of adsorption of tion to the polymer latex particles (8). It was shown that nonionic surfactants from the mixtures, adsorption increases in the PTFE surface acquired chemical functional groups on the presence of CTAB. It was also observed that among the various their surfaces during the process of polymerization and could binary systems, maximum adsorption was observed with CTAB not be removed completely even after extensive cleaning by and NP-13 system. This was attributed to the formation of the dialysis. As a result, characterization of the latex surfaces most compact arrangement of surfactants in the clusters formed become somewhat difficult. Bee et al. (8) studied the adsorpat the solid/liquid interface. Zeta potential studies carried out on tion of cationic, anionic, and nonionic surfactants on PTFE these systems compliment the adsorption results. ᭧ 1996 Academic latex particles. The adsorption of cationic surfactants on Press, Inc.