两亲性阴离子HBPN与阳离子表面活性剂CTAB络合机理的研究

Mechanism Studies of Complex Formation Between an Amphiprotic Anion(HBPN) and a Cationic Surfactant(CTAB)

用动态光散射研究了两亲性阴离子ＨＢＰＮ（高度枝化的聚酯纳米微粒）和阳离子表面活性剂ＣＴＡＢ（十六烷基三甲基溴化铵）在缓冲液中的相互作用及ＨＢＰＮ／ＣＴＡＢ络合物的形成．结果表明：在静电作用下，于碱性溶剂中，ＨＢＰＮ与由ＣＴＡＢ分子所构成的胶束形成了核壳结构络合物ＨＢＰＮ／ＣＴＡＢ．络合物粒径的大小和稳定性可以通过溶液的ｐＨ值和ＣＴＡＢ浓度来控制．

The interactions between an amphiprotic anion HBPN (highly branched polyester nanoparticle) and a cationic surfactant CTAB (cetyltrimethylammonium bromide) in buffer and HBPN/CTAB complex formation were investigated by dynamic laser light scattering. The results indicated that the core/shell structure HBPN/CTAB complexes were formed by positively charged HBPN and oppositely charged CTAB micelles, which were made from CTAB molecules at first, due to the static electricity interaction in alkaline solution. The complex size can be controlled by solution pH value and CTAB concentration.