Phase Behavior of Phytosterol Ethoxylates in an Imidazolium-Type Room-Temperature Ionic Liquid
スポンサーリンク
概要
- 論文の詳細を見る
The temperature-concentration phase behavior of nonionic surfactants in an aprotic imidazolium-type room-temperature ionic liquid (RT-IL) was evaluated on the basis of a combination of visual appearance, polarized optical microscopy, and small angle X-ray scattering data. Phytosterol ethoxylates (BPS-n, where n denotes oxyethylene chain lengths of 5, 10, 20, and 30) were used as surfactants in the RT-IL, 1-butyl-3-methylimidazolium hexafluorophosphate (BmimPF6). The two component mixtures yielded various phases such as discontinuous cubic, hexagonal, and lamellar phases. An increased tendency toward formation of lesser-curved molecular assemblies was observed at higher BPS-n concentrations, at lower temperatures, and for shorter oxyethylene chain surfactants. These trends are similar to those observed in aqueous BPS-n systems; however, notable differences in the phase states of the aqueous system versus the BmimPF6 system were evident. Comparison with the water system showed that the BmimPF6 system yielded fewer phases and generally required higher BPS-n concentrations to induce phase transitions. Evaluation of the effects of addition of a third component (e.g., 1-dodecanol and dodecane) to the binary system on the phase behavior showed that at a given composition ratio of BPS-20 to BmimPF6, the addition of 1-dodecanol generally results in the phase transition to lesser-curved assemblies whereas dodecane generated no significant effects. The observed phase change is satisfactorily rationalized by localized solubilization of the third component into the binary surfactant assemblies.
著者
-
Abe Masahiko
Department Of Internal Medicine Hokkaido Prefectural Haboro Hospital
-
Sakai Kenichi
Department Of Mathematical And Life Sciences Graduate School Of Science Hiroshima University
-
Saitoh Takanori
Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Sci
-
Misono Takeshi
Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Sci
-
Tsuchiya Koji
Department of Applied Chemistry, Faculty of Science, Tokyo University of Science
-
Sakai Hideki
Department of Industrial Chemistry, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
-
Misono Takeshi
Department of Chemistry, Faculty of Science, Fukuoka University
関連論文
- A Newly Estimated Glomerular Filtration Rate Is Independently Associated with Arterial Stiffness in Japanese Patients
- Rheological Behavior of Polyoxyethylene Phytosterol-Polyoxyethylene Cholesterol/Tetraethylene Glycol Monododecyl Ether/Water Systems
- Cethyltrimethylammonium Bromide-Mediated Hexagonal-Structured Self-Assembly of Nanocrystalline Titania : Gravity Effect on Framework Formation and Crystal Growth
- Optical Cell with a Temperature-Control Unit for a Vacuum-Ultraviolet Circular Dichroism Spectrophotometer
- Gastrointestinal stromal tumor of the stomach treated by urgent laparoscopic partial gastrectomy in an elderly woman : Report of a case
- Syntheses of Cationic Surfactants having Two Ferrocenylalkyl Chains
- Aortic Operation after Previous Coronary Artery Bypass Grafting : Management of Patent Grafts for Myocardial Protection
- B-6 Coexpression of keratinocyte glowth factor (KGF) and its receptor (KGFR) correlates with poor prognosis in prostate cancer.
- Vacuum-Ultraviolet Circular Dichroism Spectrophotometer Using Synchrotron Radiation: Optical System and On-line Performance
- Leaflet Folding Plasty for Mitral Valve Repair : Technical Application and Early Outcome
- Adsorption of Actives in Ophthalmological Drugs for Over-The-Counter on Soft Contact Lens Surfaces
- Clinical Evaluation of Serum Prostate-Specific Antigen-Alpha^1-Antichymotrypsin Complex Values in Diagnosis of Prostate Cancer: A Cooperative Study
- OJ-135 A Newly Estimated Glomerular Filtration Rate is an Independent Indicator of Arterial Stiffness(Atherosclerosis, clinical-4 (H) OJ23,Oral Presentation (Japanese),The 70th Anniversary Annual Scientific Meeting of the Japanese Circulation Society)
- Midterm outcome of leaflet folding plasty for mitral regurgitation due to posterior leaflet prolapse
- Acute pulmonary embolism after cerebral infarction associated with a mobile thrombus in the ascending aorta
- Effectiveness of Brain Hypothermia Treatment in Patients With Severe Subarachnoid Hemorrhage : Comparisons at a Single Facility
- Endovascular Treatment of Asymptomatic Cerebral Aneurysms : Anatomic and Technical Factors Related to Ischemic Events and Coil Stabilization
- Novel Approach for the Preparation of Metal Containing Mesoporous Silica Using Solubilization of Fatty Acid Salt
- Solution Properties of Sulfate-Type Fluoro-Hybrid Anionic Surfactants with a Benzene Ring in Their Molecules
- A Narrow Bicontinuous Microemulsion Domain in Mixed Polymeric Silicone Systems
- Electrochemical Behavior of a Ferrocene-Modified Cationic Surfactant Mixed with an Anionic Surfactant in Aqueous Solutions
- Transesterification by (Hydroxo)nickel(II) Complex in the Presence of External Alcohol
- The Syntheses of (Chloro) Iron (II) Complexes by Using Tridentate Polypyridine Ligands
- Triple-Decker Sandwich Structure of a New Rubidium(I)Tetraimino Macrocyclic Complex
- Sysntheses and Structures of a Novel Trinaphthylene Hexaimino Cryptand:Three Different Conformations of a Macrobicyclic Ligand
- Conformational Change of a Macrobicyclic Complex. Structure of Free Ligand and Interactions with DMSO
- Synthesis and Characterization of Barium (II) Macrobicyclic Complexes and Related Compounds
- Unicentric Castleman's disease with leiomyosarcoma : A rare association
- PROLIFERATING CELL NUCLEAR ANTIGEN IN ACTH-INDEPENDENT BILATERAL MACRONODULAR ADRENAL HYPERPLASIA
- Primary Lung Cancer with Growth into the Lumen of the Pulmonary Artery
- Coronary-Coronary Artery Bypass for Right Coronary Revascularization in Patients Undergoing Graft Replacement of the Ascending Aorta
- Aneurysms in the Ascending Aorta Adherent to the Sternum After Cardiac Surgery
- Surgical Repair of Postinfarction Ventricular Septal Rupture
- Saccular Descending Thoracic Aortic Aneurysm With Dysphagia
- Microscopic Observation of Photocatalytic Reaction Using Microelectrode: Spatial Resolution for Reaction Products Distribution
- Selective Killing of a Single Cancerous T24 Cell with TiO2 Semiconducting Microelectrode under Irradiation
- Involvement of aquaporin-5 in differentiation of human gastric cancer cells
- Leukotrienes-Mediated Effects of Water Extracts from Sargassum horneri, a Marine Brown Alga, on Cl^- Absorption in Isolated Rat Colon
- Expression of ATP1AL1, a Non-Gastric Proton Pump, in Human Colorectum
- Is Rabbit CLCA1 Related to the Basolateral Ca^-Dependent Cl^- Channel of Gastric Parietal Cells?
- Mobilization of Intracellular Ca^ by Thromboxane A_2 Does Not Affect Ca^-Activated K^+ Channels in Rat Colonic Crypt Cells
- Prostaglandin E_2-Activated Housekeeping Cl^- Channels in the Basolateral Membrane of Rat Gastric Parietal Cells
- Preparation of Liposomes Modified with Lipopeptides Using a Supercritical Carbon Dioxide Reverse-phase Evaporation Method
- DSPC/DLPC Mixed Films Supported on Silica: A QCM-D and Friction Force Study
- Physicochemical Analysis of Liposome Membranes Consisting of Model Lipids in the Stratum Corneum
- Simulation of Dynamic Behavior of Surfactants on a Hydrophobic Surface Using Periodic-Shell Boundary Molecular Dynamics
- Recent Advances in Gemini Surfactants: Oleic Acid-Based Gemini Surfactants and Polymerizable Gemini Surfactants
- Skeletal-related events in urological cancer patients with bone metastasis : A multicenter study in Japan
- Abdominal Aortic Grafting for Renal and Lower Extremity Hypoperfusion Due to Aortic Dissection with Progressive Thrombosis of a False Channel
- Vacuum-Ultraviolet Circular Dichroism Spectrophotometer Using Synchrotron Radiation: Optical System and Off-line Performance
- Polymerizable Anionic Gemini Surfactants: Physicochemical Properties in Aqueous Solution and Polymerization Behavior
- Dielectric Relaxation Analysis of Single-Stranded DNA in Liquid Crystals
- SAXS and Rheometry Studies of Diglycerol Monolurate Reverse Micelles in Styrene
- Oleic Acid-Based Gemini Surfactants with Carboxylic Acid Headgroups
- Sulfonic-Hydroxyl-Type Heterogemini Surfactants Synthesized from Unsaturated Fatty Acids
- Adsorption of Cationic Monomeric and Gemini Surfactants on Montmorillonite and Adsolubilization of Vitamin E
- GTP-Binding Protein-Mediated Production of Superoxide Anion in Rabbit Gastric Parietal Cells
- Coexistence of Creutzfeldt-Jakob disease, Lewy body disease, and Alzheimer's disease pathology : An autopsy case showing typical clinical features of Creutzfeldt-Jakob disease
- Kainic acid may enhance hippocampal NO generation of awake rats in a seizure stage-related fashion
- Identification of Human P450 Isoforms Involved in the Metabolism of the Antiallergic Drug, Oxatomide, and Its Inhibitory Effect on Enzyme Activity (Miscellaneous)
- Endogenous Arachidonic Acid Inhibits Hypotonically-Activated Cl^- Channels in Isolated Rat Hepatocytes
- Function of K+–Cl− Cotransporters in the Acid Secretory Mechanism of Gastric Parietal Cells
- Identification of Human P450 Isoforms Involved in the Metabolism of the Antiallergic Drug, Oxatomide, and Its Kinetic Parameters and Inhibition Constants(Miscellaneous)
- Nonionic Surfactant Mixtures in an Imidazolium-Type Room-Temperature Ionic Liquid
- Catanionic Mixtures Forming Gemini-like Amphiphiles
- Hierarchic Template Approach for Synthesis of Silica Nanocapsules with Tuned Shell Thickness
- Breakthrough lung Scedosporium prolificans infection with multiple cavity lesions in a patient receiving voriconazole for probable invasive aspergillosis associated with monoclonal gammopathy of undetermined significance (MGUS)
- Inhibition of ecto-ATPase activity by curcumin in hepatocellular carcinoma HepG2 cells
- Forty-year durability of a Smeloff-Cutter ball valve prosthesis in the mitral position
- Phase Behavior of Phytosterol Ethoxylates in an Imidazolium-Type Room-Temperature Ionic Liquid
- Development of a Polarized Raman Spectrometer for Supercritical Fluids Having High Critical Points
- Stable Surfactant-Free Toluene-Polyethylene-in-Water Emulsion Prepared by Ultrasonication at High Temperature
- Aggregation Behavior of Nonionic Surfactants in Room Temperature Ionic Liquids
- An MO Theoretical Investigations of the Electronic Spectra of Divalent Sulfur Compounds
- Improvement of Electrical Properties of Human Phantom in Low-Frequency Band By Using Carbon Microcoil