Abstract:

Cashew phenol polyoxyethylene ethers(CPE) were synthesized from cashew phenol as raw materials. In the presence of sodium hydroxide as a catalyst, a series of cashew phenol polyoxyethylene ether carboxylates(CPEC) were synthesized with CPE and chloroacetic acid. The products were structurally confirmed by FT-IR and elemental analysis. Surface properties were determined by a surface tension method. The experimental results showed that when critical micelle concentrations(CMC) of the surfactants were 9.30, 8.50, 8.10 and 7.71 mmol/L, the corresponding surface tensions at CMC were 28.38, 28.60, 30.40 and 30.00 mN/m, respectively. By means of Gibbs formula, the maximum adsorption amounts of the surfactants were 0.7087, 0.7350, 0.7195 and 0.7346 μmol/m², and the minimal molecular projective areas of them were 2.3439, 2.2600, 2.3087 and 2.2613 nm², respectively on solution surface.

Key words: cashew phenol, cashew phenol polyoxyethylene ether carboxylate, surface activity property