Abstract: Using saturated cashew phenol as raw material，saturated cashew phenol Gemini polyoxyethylene ether carboxylates （GSCPEC-8 and GSCPEC-10） with new chemical structure were prepared through the ring-opening polymerization reaction，alkaline reaction，carboxymethylated reaction. Their surface activities were evaluated. The products were identified by FT-IR and 1H NMR. The surface tension of Gemini saturated cashew phenol polyoxyethylene ether carboxylates were measured by drop volume method. The results are that the cmc values of GSCPEC-8 and GSCPEC-10 in aqueous solution were 0.79mmol/L and 0.69mmol/L respectively，and the values of γcmc were 36.56mN/m and 39.37mN/m respectively. The Monomer occupied minimal areas were 1.9383nm2 and 1.1072nm2 respectively. The results showed that the cmc for the GSCPEC in aqueous solution is very low，so the efficiency at reducing the surface tension of water is excellent. When EO groups increase the formation ability and the stability of the micelles increase

Key words: saturated cashew phenol, Gemini surfactant, surface tension, critical micelle concentration

摘要： 以饱和腰果酚为原料，通过缩合、开环、羧甲基化反应合成两种具有新型化学结构的饱和腰果酚Gemini聚氧乙烯醚羧酸钠（GSCPEC-8和GSCPEC-10），并研究其表面活性。FT-IR光谱和1H NMR证实饱和腰果酚Gemini聚氧乙烯醚羧酸钠结构。采用滴体积法测定了GSCPEC-8和GSCPEC-10水溶液的表面活性，结果表明：GSCPEC-8和GSCPEC-10水溶液的临界胶束浓度（cmc）分别为0.79mmol/L和0.69mmol/L，临界胶束浓度下的表面张力分别为36.56mN/m和39.37mN/m，最小单分子占有面积分别为1.9383nm2和1.1072nm2。GSCPEC水溶液的cmc值很低，具有较高的降低表面张力的效率；且随着EO基团的增加，形成胶束的能力与稳定性提高。

关键词: 饱和腰果酚, Gemini表面活性剂, 表面张力, 临界胶束浓度