Self-assembly in the mixtures of surfactant and dye molecule controlled via temperature and β-cyclodextrin recognition

CORC > 兰州化学物理研究所 > 中国科学院兰州化学物理研究所 > 固体润滑国家重点实验室

	Self-assembly in the mixtures of surfactant and dye molecule controlled via temperature and β-cyclodextrin recognition
	Wang D(王栋)
刊名	Langmuir
	2012
卷号	28 页码:14155−14163
ISSN号	0743-7463
通讯作者	郝京诚
中文摘要	A new ternary system of tetradecyldimethylamine oxide (C14DMAO)/4-phenylazo benzoic acid (AzoH)/H2O was first investigated, and it was found that the self-assembly can be regulated via temperature and β- cyclodextrin (β-CD) recognition. In the temperature regulated self-assembly, the self-assembled phase structural transition between wormlike micelles and multilamellar vesicles (onions) were determined by cryogenic-transmission electron microscopy (cryo-TEM) images and 2H nuclear magnetic resonance (2H NMR) spectra. The phase structural transition temperatures (PSTT) controlled by changing the amount of AzoH were measured by differential scanning calorimetry analysis. The self-assembled phase structural transition mechanism was discussed. It is argued that the self-assembled phase structural transition is the synergetic balance among the hydrophilic headgroup, steric structures of the hydrophobic chain, and membrane charge. β-CD molecules were used as controlling hands to modulate the phase structural transition of self-assembly of the C14DMAO/AzoH/H2O system in solution via snatching C14DMAO molecules. The phase structural transitions from the threadlike micellar phase to the lamellar phase and from the lamellar phase to the vesicular phase can each be controlled because of the β-CD molecular recognition. The phase structural transitions were confirmed by cryo-TEM observations and 2H NMR measurements. The rheological properties were also investigated to display the importance in the phase structural transition. It was found that the dye molecule, AzoH, is harder to enclose by β-CD than by C14DMAO because of the lower complex stability constant (i.e., KC14DMAO@β‑CD ≫ KAzoH@β‑CD. Therefore, the phase structural transition is mainly controlled by the inclusion of C14DMAO into the hydrophobic cavity of β-CD molecules. The phase structural transition controlled via temperature and β-CD may find potential applications such as in actuators, shape memories, drug delivery systems, and drag-reducing fluids, etc.
学科主题	材料科学与物理化学
收录类别	SCI
资助信息	the NSFC (Grant21033005);the National Basic Research Program of China (973 Program, 2009CB930103)
语种	英语
公开日期	2013-10-16
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/3966]
专题	兰州化学物理研究所_固体润滑国家重点实验室
推荐引用方式 GB/T 7714	Wang D. Self-assembly in the mixtures of surfactant and dye molecule controlled via temperature and β-cyclodextrin recognition[J]. Langmuir,2012,28:14155−14163.
APA	王栋.(2012).Self-assembly in the mixtures of surfactant and dye molecule controlled via temperature and β-cyclodextrin recognition.Langmuir,28,14155−14163.
MLA	王栋."Self-assembly in the mixtures of surfactant and dye molecule controlled via temperature and β-cyclodextrin recognition".Langmuir 28(2012):14155−14163.