In this paper, the result of cationic rosin surfactant antisepticising several kinds of microbe is probed.

Interactions between a cationic gemini surfactant,1,2-ethane bis(dimethyldodecylammonium bromide)(designated as 12-212) with hydrophobically modified polyacrylamide(HMPAM) and nonionic polyacrylamide(PAM),were investigated by means of surface tension and conductivity.

The effects of cationic Gemini surfactants on the wettability of solid surface were examined and their action mechanisms were discussed.

The effects of absorption time and temperature,mass concentration of surfactant,liquid/solid ratio of sb- sorption system,and pH value on the static absorption properties of cationic gemini surfactant(NNMB)to clean sand were studied by ultraviolet visible prismatic luminosity method.

The applications of cationic Gemini surfactants in recent years in preparation of new materials,corrosion inhibition,bactericide,enhanced oil recovery,textile,biological technology,paper-making industry are introduced.

Interactions between gemini cationic surfactants and methyl orange;

Resonance Rayleigh scattering determination of cationic surfactant in natural waters based on formation of Ca~(2+)-quercitrin-surfactant complex;

Synthesis and characterization of nanocrystal TiO_2 in the system cationic surfactant;

Study and synthesis of the cationic surfactant of polyoxyethlene;

Improvement method for determination of cationic surfactants in environmental water samples;

Progress in research on determination of cationic surfactants in water;

Simultaneous determination of critical micelle concentration and counter-ion association degree of aqueous cationic surfactants solution system by chloride ion selective electrode;