Lamellar liquid crystal polymerization of sodium oleate/oleic acid/octadiene/water system

• 来源期刊: 中国化学(英文版)
• 年，卷（期）: 2000,（1）
• 所属期刊栏目: Articles
• 页码范围: 13-17
• 页数: 5页
• 语种: 英文

摘要

In the lamellar liquid crystallization (LLC) phase of NaOL/OLA/H2O system, the small angle X-ray diffraction measurements show that the oleic acid is solubilized in the oil layer at first and then into the ampliphile layer. The octadiene added is also located partly in the oil layer and partly in the amphiphile layer in the LLC. With the addition of octadiene as cross-linking agent, the LLC phase of NaOL/OLA/H2O system was polymerized under the initiation of AIBN with the protection of pure nitrogen at 60℃. Most of the double bond absorption of the monomers in IR spectra disappeared after polymerization. The polymerization takes place not only in the middle of the amphiphile layer between the double bonds of NaOL or OLA and those of octadiene, but also in the oil layer of LLC between the double bonds of OLA and those of octadiene. Interlayer spacing measurements on the copolymer proved d values decreased by about 1 ～ 2 nm compared with those of the corresponding system before the polymerization,indicating a disruption of the ordered structure by the polymerization. The copolymer still has superior surface activity with the critical micellar concentration (CMC) decreased almost to the half of the value for the system before the polymerization.