CAJ | 학술논문

季铵盐 Gemini 表面活性剂 C12-s-C12·2Br(s=2,3,4,5,6,8,12)在庚烷中需要己醇助溶,并以反胶团形式分散在溶剂中.己醇助溶ns摩尔表面活性剂在no摩尔庚烷中的临界摩尔数na=ano+bns,式中系数a和b分别为0.0266,6.05(s=2);0.0191,4.39(s=3);0.0225,2.98(s=4);0.0298,8.49(s=5);0.0377,3.95(s=6);0.0148,6.66(s=8)和0.0153,12.7(s=12).b 反映了平均分配到每个表面活性剂分子的己醇分子数,b随s的奇偶数呈现不同变化规律,这被归结为联接链弯曲程度差异的缘故.由于s 为奇数时联接链弯曲程度较大,减小了头基在反胶团内核表面占据的面积,需要插入更多的己醇以构成稳定的反胶团.C12-2-C12·2Br具有相对最小的头基面积,因而要求较多的己醇助溶.
계안염 Gemini 표면활성제 C12-s-C12·2Br(s=2,3,4,5,6,8,12)재경완중수요기순조용,병이반효단형식분산재용제중.기순조용ns마이표면활성제재no마이경완중적림계마이수na=ano+bns,식중계수a화b분별위0.0266,6.05(s=2);0.0191,4.39(s=3);0.0225,2.98(s=4);0.0298,8.49(s=5);0.0377,3.95(s=6);0.0148,6.66(s=8)화0.0153,12.7(s=12).b 반영료평균분배도매개표면활성제분자적기순분자수,b수s적기우수정현불동변화규률,저피귀결위련접련만곡정도차이적연고.유우s 위기수시련접련만곡정도교대,감소료두기재반효단내핵표면점거적면적,수요삽입경다적기순이구성은정적반효단.C12-2-C12·2Br구유상대최소적두기면적,인이요구교다적기순조용.
The dissolution of quaternary-ammonium gemini surfactants C12-s-C12·2Br(s=2, 3, 4, 5, 6, 8, 12) in heptane needs 1-hexanol as cosolvent. C12-s-C12·2Br and 1-hexanol form the mixed reverse micelles resulting in their dispersion in heptane. The critical moles of 1-hexanol na required to dissolving ns mol geminis in no mol heptane can be calculated from the formula na = ano + bns. The corresponding coefficients a and b are respectively 0.0266, 6.05(s=2); 0.0191, 4.39(s=3); 0.0225, 2.98(s=4); 0.0298, 8.49(s=5); 0.0377, 3.95(s=6); 0.0148, 6.66(s=8); and 0.0153, 12.7(s=12). b inflects the average molecular number connected to per surfactant molecule and exhibits different variation laws with s being odd or even. The latter was attributed to larger bend for odd s than even s, which reduces the head area occupied on the core surface of the reverse micelle and thus attracts more 1-hexanol molecules incorporating into the reverse micelles. C12-2-C12·2Br molecule has relative minimum head area in the series and needs more 1-hexanol aid-dissolution.