Iridescent phenomena and polymerization behaviors of amphiphilic monomers in lamellar liquid crystalline phase

Naitoh, Kouichi; Ishii, Yasuo; Tsujii, Kaoru

doi:10.1021/j100173a066

Cited by 68 publications

(96 citation statements)

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“…When the molar ratio of SDS to DGI is 6 1:4000 (SDS concn.= 1.09×10 -5 mol/L), after being kept in water bath at 55 o C for 3 h, the solution shows pink color appearance, while the ratio is smaller than 1:4000, a turbid, heterogeneous solution is obtained. This indicates that a phase separation into liquid crystalline droplets and almost pure water phase takes place in the absence of SDS [20] . As the ratio of SDS increases to 1:30, the solution changes to transparent and colorless one.…”

Section: Dynamic Process Of Color Change In Dilute Region Of Sdsmentioning

confidence: 88%

“…DGI was synthesized by essentially the same procedures as those in the previous works 20,21 . The crude product was purified by a silica gel column (Silica Gel 60N, KANTO Chemical Co., Inc.).…”

Section: Methodsmentioning

confidence: 99%

“…The mixed solutions of DGI and the ionic surfactants were kept at 55 o C to obtain the iridescent color since the Krafft point of DGI was 43 o C [20,21] .…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…This paper deals with an iridescent solution of a polymerizable nonionic surfactant, n-dodecyl glyceryl itaconate [DGI; n-C 12 H 25 OCOCH 2 C(=CH 2 )COOCH 2 CH(OH)CH 2 OH] [20] . DGI forms bilayer membranes (lamellar liquid crystal) in water and gives iridescent color in the presence of small amount of ionic surfactants such as N,N-dimethylbenzylammonium dodecylitaconate, sodium dodecyl sulfate (SDS) [20] . We have first found in this work that the iridescent color of DGI solutions can be tuned from red to deep blue by changing the concentration of ionic surfactant added even though its concentration is negligibly small comparing with the total surfactant concentration.…”

Section: Introductionmentioning

confidence: 99%

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Effect of ionic surfactants on the iridescent color in lamellar liquid crystalline phase of a nonionic surfactant

Chen

Mayama

Matsuo

et al. 2007

Journal of Colloid and Interface Science

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1A nonionic surfactant, n-dodecyl glyceryl itaconate (DGI), self-assembles into bilayer membranes in water having a spacing distance of sub-micrometer in the presence of small amounts of ionic surfactants, and shows beautiful iridescent color. Ionic surfactants have great effects on this iridescent system. We have interestingly found that the iridescent color changes with time after mixing DGI and ionic surfactants and the color in equilibrium state changes greatly with changing concentration of the ionic surfactants. The time dependent color change results from the transformation of DGI aggregate structure after being mixed with ionic surfactant. It is first found that the iridescent color of this nonionic system can be changed from red to deep blue by altering the concentration of ionic surfactants added even though the total concentration of surfactant is almost constant. Such large blue shift of the iridescent color in equilibrium state cannot be fully explained by the ordinary undulation theory applied so far for this phenomenon. The flat lamellar sheets tend to curve by increasing the concentration of ionic surfactants to form separated onion-like and/or myelin-like structures. These separated structures of lamellar system result in the decrease of spacing distance between bilayer membranes because some vacant spaces necessarily appear among these structures.

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Section: Dynamic Process Of Color Change In Dilute Region Of Sdsmentioning

confidence: 88%

Section: Methodsmentioning

confidence: 99%

“…The mixed solutions of DGI and the ionic surfactants were kept at 55 o C to obtain the iridescent color since the Krafft point of DGI was 43 o C [20,21] .…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of ionic surfactants on the iridescent color in lamellar liquid crystalline phase of a nonionic surfactant

Chen

Mayama

Matsuo

et al. 2007

Journal of Colloid and Interface Science

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Iridescence of 2-hydroxyethyl methacrylate/aromatic allyl ester reaction mixtures

Tsuchiya

Kojima

1999

J. Appl. Polym. Sci.

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ABSTRACT:Reaction of 2-hydroxyethyl methacrylate and diallyl phthalate or vinyl 4-tert-butylbenzoate has been found to give an iridescent reaction mixture. Transmittance spectra of the reaction mixture depended on the temperature in the range of 0 to 60°C. The temperature-transmittance curves showed a discrete stepwise change near the room temperature. Polymerization reaction of 2-hydroxyethyl methacrylate (PHEMA) in a nonreactive monomer substitute, dipropyl phthalate, showed a temperature dependence as was seen for the iridescent reaction mixture, but was not iridescent. PHEMA suspension in several aromatic solvents also showed iridescence, and some of them were temperature dependent. The mechanism of temperature-dependent iridescence of the copolymerization reaction mixtures is discussed.

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Polymerization in Organized Media

Stupp

Osenar

2013

Materials Science and Technology

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The sections in this article are Introduction Topochemical Systems Thermotropic Systems Lyotropic Systems Vesicles and Bilayers Langmuir–Blodgett Films Intercalated Systems Thermodynamics/Kinetics Two‐Dimensional Products from Ordered Media Two‐Dimensional Confinement of Monomer Two‐Dimensional Polymers from Self‐Assembling Monomers Nanostructures Via the Polymerization of Supramolecular Units

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Iridescent phenomena and polymerization behaviors of amphiphilic monomers in lamellar liquid crystalline phase

Cited by 68 publications

References 1 publication

Effect of ionic surfactants on the iridescent color in lamellar liquid crystalline phase of a nonionic surfactant

Effect of ionic surfactants on the iridescent color in lamellar liquid crystalline phase of a nonionic surfactant

Iridescence of 2-hydroxyethyl methacrylate/aromatic allyl ester reaction mixtures

Polymerization in Organized Media

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