PHASE-SEPARATION OF THE AQUEOUS-SOLUTION AND THE SURFACE-ACTIVITY OF OXYETHYLENATED CATIONIC ANIONIC SURFACTANTS
PHASE-SEPARATION OF THE AQUEOUS-SOLUTION AND THE SURFACE-ACTIVITY OF OXYETHYLENATED CATIONIC ANIONIC SURFACTANTS
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DOI：
10.1016/0927-7757(94)03017-t
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发表时间：
1995-03-10
影响因子：
5.2
通讯作者：
LIU, FM
中科院分区：
文献类型：
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作者：
LI, XG;LIU, FM
正阴离子表面活性剂C8H17 (OC2H4)(n)SO4Na-C8H17N(CH3)(3)Br (C(8)E（n)S-C(8)NM(3)): n = 0,1,3）、C8S-C8H17 (OC2H4)(3) n (CH3)(3)Cl (C(8)E（3)NM(3)）、C(8)E(3)S-CmH2m+1N(CH3)3Br (C（m)NM(3)）水溶液的相分离；m = 10,12), C12H25(OC2H4)(n)SO4Na- c12h25n (CH3)3Br (C(12)E(n)S-C（12)NM(3): n = 0,3,5,7）和C8H17C6H4 (OC2H4)(9.8)SO4Na(C-8 φ E(9.8)S)-C(m)NM(3) （m = 12,14,16）进行了研究。C(8)E(n)S-C(8)NM(3)和C(12)E(n)S-C(12)NM(3)水溶液的相分离浓度区（CRPS）随着n的增加而缩小，当C(8)E(n)S-C(8)NM(3)和C(12)E(n)S-C(12)NM(3)的n等于或大于3时，CRPS消失。相反，C(8)E(8)S-C(m)NM(3)水溶液的CRPS随m的增加而增加。分子相互作用参数与混合体系CRPS的比较表明，两种表面活性剂组分之间的分子相互作用越大，越容易发生相分离，反之亦然。在C-8 φ E(9.8)S-C(m)NM(3)体系中，即使m很大也不存在相分离现象。1:1 C-8 φ E(9.8)S-C(m)NM(3)混合物的表面活性仍远高于单一组分。在正阴离子表面活性剂分子中引入较多的氧乙烯（EO）基团，使得混合水溶液在非常高的浓度下均相，具有重要的理论和实践意义。
The phase separation of the aqueous solutions of cationic-anionic surfactants, C8H17 (OC2H4)(n)SO4Na-C8H17N(CH3)(3)Br (C(8)E(n)S-C(8)NM(3): n = 0, 1, 3), C8S-C8H17 (OC2H4)(3)N(CH3)(3)Cl (C(8)E(3)NM(3)), C(8)E(3)S-CmH2m+1N(CH3)3Br (C(m)NM(3); m = 10, 12), C12H25(OC2H4)(n)SO4Na-C12H25N(CH3)3Br (C(12)E(n)S-C(12)NM(3): n = 0, 3, 5, 7) and C8H17C6H4 (OC2H4)(9.8)SO4Na(C-8 Phi E(9.8)S)-C(m)NM(3) (m = 12, 14, 16) has been investigated. The concentration region of phase separation (CRPS) of the aqueous solution of C(8)E(n)S-C(8)NM(3) and C(12)E(n)S-C(12)NM(3) contracts with the increase in n, and the CRPS disappears when n is equal to (or over 3) for C(8)E(n)S-C(8)NM(3) and 7 for C(12)E(n)S-C(12)NM(3). On the contrary, the CRPS of the aqueous solution of C(8)E(8)S-C(m)NM(3), increases with the increase in m. The comparison between the molecular interaction parameter and the CRPS of the mixed system shows that the greater the molecular interaction between the two surfactant components, the easier it is for phase separation to occur, and vice versa. In the C-8 Phi E(9.8)S-C(m)NM(3) system, there is no phase separation even if m is very large. The surface activity of a 1:1 C-8 Phi E(9.8)S-C(m)NM(3) mixture is still much higher than that of the single components. A relatively large number of oxyethylene (EO) groups introduced into the cationic-anionic surfactant molecule makes the mixed aqueous solution homogeneous at a very high concentration, which is of great significance in theory and practice.