Synthetic bilayer membranes prepared from dialkyl amphiphiles with nonionic and zwitterionic head groups

Yoshio Okahata, Shoichi Tanamachi, Masaru Nagai, Toyoki Kunitake

研究成果: Contribution to journalArticle査読

77 被引用数 (Scopus)

抄録

Dialkyl amphiphiles with nonionic and zwitterionic head groups were prepared. The nonionic group is the polyoxyethylene chain and the zwitterionic group is composed of the combinations of ammonium sulfonate, ammonium phosphate, and ammonium amidate. These dialkyl amphiphiles, when dissolved in water, produced very large aggregates as determined by small-angle light scattering: 1-50 million daltons. The critical micelle concentration was 10-5- 10-6 M. The aggregate morphology was examined by electron microscopy. In the case of the nonionic amphiphile, the chain lengths of both the polyoxyethylene and dialkyl groups were shown to affect the morphology. When the alkyl chain length was C12, C14, C16, and C18 (but not C8), the bilayer formation was observed, and vesicles, lamellae, and disks were found depending on the amphiphile structure. The zwitterionic amphiphiles similarly produced vesicles and lamellae. Most of these aggregates showed the phase transition phenomenon (solid-liquid crystal). The transition temperature rose with increasing alkyl chain lengths in general agreement with that of lecithin.

本文言語英語
ページ(範囲)401-417
ページ数17
ジャーナルJournal of Colloid And Interface Science
82
2
DOI
出版ステータス出版済み - 8 1981

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 生体材料
  • 表面、皮膜および薄膜
  • コロイド化学および表面化学

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