1
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Feng R, Wu Y, Wang W, Fang Y, Chen M, Xia Y. Investigation of polymer−surfactant complexes by both micellar solubilization and pre-column derivatization capillary electrophoresis. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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2
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Song Y, Niu Y, Zheng H, Yao Y. Interaction of Bis-Guanidinium Acetates Surfactants with Bovine Serum Albumin Evaluated by Spectroscopy. TENSIDE SURFACT DET 2021. [DOI: 10.1515/tsd-2020-2283] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
The interactions between cocopropane bis-guanidinium acetates, tallowpropane bis-guanidinium acetates with bovine serum albumin (BSA) in an aqueous solution were studied by fluorescence and circular dichroic spectroscopy measurements. The aim of the study was to elucidate the influence of the hydrophilic group and the length of the hydrophobic chain of these surfactants on the mechanism of binding to BSA. The results revealed that for both surfactants, at low concentrations, the Stern–Volmer plots had an upward curvature and at high concentrations, the quenching efficiency was decreased with increase in surfactant concentration. Different thermodynamics parameters demonstrated the existence of hydrogen bond and van der Waals force which acting as binding forces. Static quenching was observed among the protein and surfactant. The conformation of BSA was changed at higher surfactant concentrations as shown by synchronous fluorescence and CD spectroscopy. This work reveals the mechanism and binding characteristics between guanidine surfactants and protein, and provided the basis for further applications of surfactants.
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Affiliation(s)
- Yongbo Song
- Department of Chemistry and Chemical Engineering Taiyuan Institute of Technology , 31# Xinlan Road Taiyuan Shanxi Province P. R. China
| | - Yulan Niu
- Department of Chemistry and Chemical Engineering Taiyuan Institute of Technology , 31# Xinlan Road Taiyuan Shanxi Province P. R. China
| | - Hongyan Zheng
- Department of Chemistry and Chemical Engineering Taiyuan Institute of Technology , 31# Xinlan Road Taiyuan Shanxi Province P. R. China
| | - Ying Yao
- Department of Chemistry and Chemical Engineering Taiyuan Institute of Technology , 31# Xinlan Road Taiyuan Shanxi Province P. R. China
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3
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Bujak T, Wasilewski T, Nizioł-Łukaszewska Z. Effect of molecular weight of polyvinylpyrrolidone on the skin irritation potential and properties of body wash cosmetics in the coacervate form. PURE APPL CHEM 2019. [DOI: 10.1515/pac-2018-0703] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Body wash cosmetics are among the most common groups of cosmetics used by consumers. Faced with strong competition in the marketplace, cosmetic manufacturers search for innovative solutions both in terms of product composition and form. An example of an innovative technology which can be used in the production of body wash cosmetics is the process of coacervation which yields a concentrated body wash product. Another important aspect which needs to be considered in the formulation of body wash cosmetics is their safety of use. It is crucial to ensure that such cosmetic products do not induce skin irritations. At present, the most widespread method of reducing the skin irritation potential of cosmetic products is the use of surfactant mixtures. The study is an attempt to evaluate the effect of using polyvinylpyrrolidone in the formulations of model body wash cosmetics in the coacervate form on the skin irritation potential and basic quality determinants of body wash products. Polyvinylpyrrolidone was found to contribute to a significant reduction in the irritant effect, and the skin irritation potential decreased in proportion to increasing molecular mass of the polymer. The application of polyvinylpyrrolidone with the different molecular weight also has an impact on improving the foaming properties of model body wash cosmetics and the stability of foam they produce.
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Affiliation(s)
- Tomasz Bujak
- Department of Technology of Cosmetic and Pharmaceutical Products , University of Information Technology and Management in Rzeszow , Sucharskiego 2 , Rzeszow 35-225 , Poland
| | - Tomasz Wasilewski
- Department of Chemistry , University of Technology and Humanities in Radom , Chrobrego 27 , Radom 26-600 , Poland
| | - Zofia Nizioł-Łukaszewska
- Department of Technology of Cosmetic and Pharmaceutical Products , University of Information Technology and Management in Rzeszow , Sucharskiego 2 , Rzeszow 35-225 , Poland
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4
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Capillary electrophoresis becoming an effective tool for explaining inconsistent results of interactions between nonionic polymers and phosphate surfactants. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2018.10.046] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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5
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Wu Y, Chen M, Fang Y, Wang W. Investigation of pseudo-polyanion formation between polyvinylpyrrolidone and sodium dodecanoate in aqueous solution by capillary electrophoresis, conductometry, tensiometry and calcium stability. RSC Adv 2017. [DOI: 10.1039/c6ra26629k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
H-bonding replaces sodium bridging in the PVP–SD complexation with pH reduction.
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Affiliation(s)
- Yefan Wu
- The Key Laboratory of Food Colloids and Biotechnology (Ministry of Education)
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
- China
| | - Miaomiao Chen
- The Key Laboratory of Food Colloids and Biotechnology (Ministry of Education)
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
- China
| | - Yun Fang
- The Key Laboratory of Food Colloids and Biotechnology (Ministry of Education)
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
- China
| | - Wangsong Wang
- The Key Laboratory of Food Colloids and Biotechnology (Ministry of Education)
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi
- China
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6
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Bujak T, Wasilewski T, Nizioł-Łukaszewska Z. Role of macromolecules in the safety of use of body wash cosmetics. Colloids Surf B Biointerfaces 2015; 135:497-503. [PMID: 26291586 DOI: 10.1016/j.colsurfb.2015.07.051] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 07/17/2015] [Accepted: 07/20/2015] [Indexed: 10/23/2022]
Abstract
One of the most challenging problems related to the use of surfactants in body wash cosmetics is their potential to cause skin irritations. Surfactants can bind with proteins, remove lipids from the epidermal surface, contribute to the disorganization of liquid crystal structures in the intercellular lipids, and interact with living skin cells. These processes can lead to skin irritations and allergic reactions, and impair the epidermal barrier function. The present study is an attempt to assess the effect of polymers and hydrolysed proteins present in the formulations of model body wash cosmetics on product properties. Special attention was given to the safety of use of this product type. The study examined three macromolecules: polyvinylpyrrolidone (PVP), hydrolysed wheat protein (HWP) and polyvinylpyrrolidone/hydrolysed wheat protein crosspolymer (PVP/HWP). The addition of the substances under study was found to improve the foaming properties of body wash cosmetics, increase their stability during storage, and contribute significantly to an improvement in the safety of product use by reducing the irritant potential. The strongest ability to reduce the skin irritation potential was determined for the formula enriched with the PVP/HWP crosspolymer.
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Affiliation(s)
- Tomasz Bujak
- Department of Cosmetology, University of Information Technology and Management in Rzeszow, Sucharskiego 2, Rzeszow 35-225, Poland.
| | - Tomasz Wasilewski
- Department of Chemistry, University of Technology and Humanities in Radom, Chrobrego 27, Radom 26-600, Poland
| | - Zofia Nizioł-Łukaszewska
- Department of Cosmetology, University of Information Technology and Management in Rzeszow, Sucharskiego 2, Rzeszow 35-225, Poland
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7
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Modolon SDM, Felippe AC, Fizon TE, da Silva L, da Silva Paula MM, Dal-Bó AG. Self-association of sodium deoxycholate with EHEC cellulose cooperatively induced by sodium dodecanoate. Carbohydr Polym 2014; 111:425-32. [DOI: 10.1016/j.carbpol.2014.04.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2014] [Revised: 04/10/2014] [Accepted: 04/11/2014] [Indexed: 11/16/2022]
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8
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Lin JH, Hou SS. Effects of Organic Salts on Polymer–Surfactant Interactions: Roles of Bu4NBr and Pr4NBr in PVP–SDS Complexation. Macromolecules 2014. [DOI: 10.1021/ma5012232] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Jia-Hsien Lin
- Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
| | - Sheng-Shu Hou
- Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
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9
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Pojják K, Mészáros R. Preparation of stable electroneutral nanoparticles of sodium dodecyl sulfate and branched poly(ethylenimine) in the presence of pluronic F108 copolymer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:14797-14806. [PMID: 22050126 DOI: 10.1021/la203759r] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Mixing of polyelectrolyte solutions with solutions of oppositely charged surfactants usually leads to phase separation in a certain concentration range. However, since the charge-neutralized polyelectrolyte/surfactant nanoparticles might be utilized as versatile nanocarriers of different substances, it would be desirable to prevent their aggregation for some applications. As it was revealed in earlier investigations, the complete suppression of precipitation may be achieved only in mixtures of ionic surfactants and appropriate copolymer polyelectrolytes with nonionic and ionic blocks. In this work, we present a method that could prevent phase separation in mixtures of homopolyelectrolytes and oppositely charged surfactants. Specifically, it is shown that nonaggregating electroneutral nanocomplexes of branched poly(ethylenimine) (PEI) and sodium dodecyl sulfate (SDS) can be prepared in the presence of the amphiphilic triblock copolymer Pluronic F108, provided that an adequate mixing protocol is used for preparation of the PEI/SDS/F108 mixtures.
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Affiliation(s)
- Katalin Pojják
- Laboratory of Interfaces and Nanosized Systems, Institute of Chemistry, Eötvös Loránd University, 1117 Budapest, Pázmány Péter sétány 1/A, Hungary
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10
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Dal-Bó AG, Laus R, Felippe AC, Zanette D, Minatti E. Association of anionic surfactant mixed micelles with hydrophobically modified ethyl(hydroxyethyl)cellulose. Colloids Surf A Physicochem Eng Asp 2011. [DOI: 10.1016/j.colsurfa.2011.02.028] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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Villetti MA, Bica CID, Garcia ITS, Pereira FV, Ziembowicz FI, Kloster CL, Giacomelli C. Physicochemical properties of methylcellulose and dodecyltrimethylammonium bromide in aqueous medium. J Phys Chem B 2011; 115:5868-76. [PMID: 21517042 DOI: 10.1021/jp110247r] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Interactions between uncharged polymers and cationic surfactants are considered weaker than interactions with the anionic analogues. This work describes the binding occurring between methylcellulose (MC) and the cationic surfactant DTAB in aqueous medium. In the absence of salt, MC-DTAB exhibits a maximum in hydrodynamic radius, R(h,slow), with the increase in the surfactant concentration. Otherwise, in presence of salt the MC-DTAB system shows only a linear increase of R(h,slow). CAC is lower than the CMC, which is taken as an evidence of binding between the cationic surfactant and neutral polymer that induces the aggregation process. Static light scattering, rheology and micro-DSC results highlight the hydrophobic MC-DTAB association. Salt-out and the salt-in effects were observed in presence of DTAB, with a clear transition at concentration values close to the CMC, as judged from rheological and micro DSC measurements. Indeed, DTAB affects both the pattern of the sol-gel transition and the gel strength.
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Affiliation(s)
- Marcos A Villetti
- Departamento de Física, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, 97105-900 Santa Maria-RS, Brazil.
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12
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Tardioli S, Bonincontro A, La Mesa C, Muzzalupo R. Interaction of bovine serum albumin with gemini surfactants. J Colloid Interface Sci 2010; 347:96-101. [PMID: 20362296 DOI: 10.1016/j.jcis.2010.03.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2010] [Revised: 03/09/2010] [Accepted: 03/09/2010] [Indexed: 10/19/2022]
Abstract
The interactions between bovine serum albumin and cationic gemini surfactants were investigated as a function of concentration, under different pH conditions. The investigation deals with dielectric relaxation, dynamic light scattering, zeta-potential, circular dichroism, and UV spectroscopy. The interactive behavior of the anionic form is quite different from the cationic species. It indicates that protein-surfactant interactions are mostly electrostatic in nature and depend on the state of charge of bovine serum albumin. The results indicate the presence of both hydrophobic and electrostatic contributions in the interactions of gemini with bovine serum albumin. Comparison of dynamic light scattering, dielectric relaxation, electrophoretic mobility, and optical circular dichroism allows drawing some preliminary hypotheses on the different contributions to surfactant binding and supports former studies on the formation of complexes between the bovine serum albumin and the above species.
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Affiliation(s)
- Silvia Tardioli
- CNISM-Physics Department, La Sapienza University, Rome, Italy
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13
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Faustino CMC, Calado ART, Garcia-Rio L. Gemini surfactant-protein interactions: effect of pH, temperature, and surfactant stereochemistry. Biomacromolecules 2009; 10:2508-14. [PMID: 19637908 DOI: 10.1021/bm9004723] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The interactions between bovine serum albumin (BSA) and gemini surfactants derived from cystine have been investigated and were compared with the conventional single-chain surfactant derived from cysteine. The influence of the stereochemistry of the gemini surfactant on its behavior toward BSA was also investigated, as well as the effects of pH and temperature. Electrical conductivity and surface tension measurements were used to obtain important system parameters such as critical aggregation concentration (cac), polymer saturation point (psp), degree of ionization (alpha), and the amount of surfactant binding to protein (M). Stereochemistry was found to influence the surface properties of the surfactants studied and their interaction with BSA but not their micellar properties in solution.
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Affiliation(s)
- Célia M C Faustino
- iMed.UL, Faculty of Pharmacy, University of Lisbon, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal.
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14
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Mehta S, Bhawna, Kaur K, Bhasin K. Micellization behavior of cationic surfactant dodecyldimethylethylammonium bromide (DDAB) in the presence of papain. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2007.09.029] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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15
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Effects of SDS on the sol–gel transition of konjac glucomannan in SDS aqueous solutions. Colloid Polym Sci 2007. [DOI: 10.1007/s00396-007-1810-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Ciurleo A, Cinelli S, Guidi M, Bonincontro A, Onori G, Mesa CL. Some Properties of Lysozyme−Lithium Perfluorononanoate Complexes. Biomacromolecules 2006; 8:399-405. [PMID: 17291063 DOI: 10.1021/bm060609d] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Mixtures containing lysozyme, LYSO, and a fully fluorinated surfactant, lithium perfluorononanoate, LiPFN, were investigated in a wide range of concentrations and mole ratios. To ensure consistency to the data, a comparison was made, when possible, with the more conventional SDS as surfactant. Molecular solutions, precipitates, and micellar phases have been observed. The region of existence for each phase depends on the LiPFN/LYSO mole ratios, r, and was determined by different experimental methods. Optical absorbance, CD, 19F NMR, viscosity, electrical conductivity, and dielectric relaxation methods were used. Some methods give information on the protein conformation, others on the state of the surfactant or on the collective system properties, respectively. Addition of LiPFN gives rise to a solution, a poly phase dispersion (at low surfactant to protein ratios) and to a micelle-mediated redissolution of the precipitates. Concomitant to the above macroscopic properties, peculiar effects in the state of LYSO are observed. Low amounts of surfactant reduce significantly the amount of alpha-helix in favor of the beta-sheet conformation of the protein. The former is almost completely regained once micelle-assisted redissolution of the complex occurs. The tertiary structure of the protein, conversely, is lost at low surfactant content and never recovered. Such evidence suggests the occurrence of a molten globule conformation for LYSO in micellar media.
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17
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Zanette D, Felippe AC, Schweitzer B, Dal Bó A, Lopes A. The absence of cooperative binding in mixtures of sodium cholate and poly(ethylene oxide) as indicated by surface tension, steady-state fluorescence and electrical conductivity measurements. Colloids Surf A Physicochem Eng Asp 2006. [DOI: 10.1016/j.colsurfa.2005.12.045] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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18
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Bó AD, Schweitzer B, Felippe AC, Zanette D, Lindman B. Ethyl(hydroxyethyl)cellulose–sodium dodecanoate interaction investigated by surface tension and electrical conductivity techniques. Colloids Surf A Physicochem Eng Asp 2005. [DOI: 10.1016/j.colsurfa.2005.01.017] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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19
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Honda C, Kamizono H, Matsumoto KI, Endo K. Studies on bovine serum albumin–sodium dodecyl sulfate complexes using pyrene fluorescence probe and 5-doxylstearic acid spin probe. J Colloid Interface Sci 2004; 278:310-7. [PMID: 15450449 DOI: 10.1016/j.jcis.2004.06.023] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2003] [Accepted: 06/03/2004] [Indexed: 11/27/2022]
Abstract
Interactions and characteristics of 0.1% bovine serum albumin (BSA)-sodium dodecyl sulfate (SDS) in 20 mM phosphate buffer solution were investigated by means of fluorescence spectroscopy and electron spin resonance (ESR) spectroscopy. In BSA-SDS system, the intensity ratio, Im3/Im1, of the third vibronic band of the pyrene monomer to the first vibronic band showed a small peak at about 0.1 mM SDS in the phosphate buffer below cmc. In accordance with this Im3/Im1 ratio, the intensity ratio, Ie/Im1, of fluorescence from the pyrene excimer to that from the monomer showed a pseudo-plateau (0.08-0.8 mM) and suggested the existence of micelle-like aggregates below the cmc. Temperature dependence of ln(Ie/Im1) in pyrene fluorescence in the SDS-BSA system was examined as a function of SDS concentration. The activation energy of pyrene diffusion for excimer formation in a micelle was estimated to be 19.2 kJ mol(-1) for the BSA-SDS system. ESR spectra of 5-doxylstearic acid (5-DSA) showed that the probe location is restricted at SDS concentrations above the cmc, and that the probe also is highly restricted in motion for BSA-bound SDS micelles.
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Affiliation(s)
- Chikako Honda
- Department of Physical Chemistry, Showa Pharmaceutical University, Higashi-Tamagawagakuen 3-3165, Machida, Tokyo 194-8543, Japan.
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20
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Ridell A, Evertsson H, Nilsson S. Influence of Counterion on the Interaction of Dodecyl Sulfates and Cellulose Ethers. J Colloid Interface Sci 2002; 247:381-8. [PMID: 16290478 DOI: 10.1006/jcis.2001.8151] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2000] [Accepted: 12/10/2001] [Indexed: 11/22/2022]
Abstract
Fluorescence probe techniques together with microcalorimetry and dye solubilization were used to study the interaction between nonionic polymers and anionic surfactants with different monovalent counterions in order to examine the effects of the counterion. The polymers used were the cellulose ethers hydroxypropyl methyl cellulose (HPMC) and ethyl hydroxyethyl cellulose (EHEC). The surfactants were dodecyl sulfates with potassium, sodium, and lithium as counterions (KDS, NaDS, LiDS). The counterion influenced the interaction start concentration as well as the nature of the mixed aggregates formed. The interaction start, according to surfactant concentration, was found to be in the order KDS < NaDS < LiDS for both polymers as well as in aqueous solution. From fluorescence measurements it was found that the KDS-polymer aggregates shield pyrene from water better than the other surfactants, indicating larger aggregates with a more fluid interior. The microcalorimetry measurements confirm that the adsorption of the surfactants onto the polymer is endothermic and entropy driven at the start and as more clusters are formed on the polymer chains the process converts to being exothermic and driven by both enthalpy and entropy.
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Affiliation(s)
- Annika Ridell
- Physical Pharmaceutical Chemistry, Uppsala Biomedical Centre, Uppsala University, Box 580, Uppsala, S-751 23, Sweden.
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21
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Zanette D, Soldi V, Romani AP, Gehlen MH. The Role of the Carboxylate Head Group in the Interaction of Sodium Dodecanoate with Poly(ethylene oxide) Investigated by Electrical Conductivity, Viscosity, and Aggregation Number Measurements. J Colloid Interface Sci 2002; 246:387-92. [PMID: 16290427 DOI: 10.1006/jcis.2001.8088] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2001] [Accepted: 11/08/2001] [Indexed: 11/22/2022]
Abstract
The binding of sodium dodecanoate (SDoD) to poly(ethylene oxide) (PEO) in aqueous solution was investigated and compared with the well-known polymer-surfactant complexes formed between PEO and sodium dodecyl sulfate (SDS). Electrical conductivity measurements indicated that the concentration ratio of bound SDoD to PEO (on monomer basis) was greater than that for the system PEO-SDS. However, the aggregation numbers of the micelles supported on the polymer chain are practically constant and similar for both surfactants at concentrations lower than the polymer saturation point. The difference in binding capability is explained in terms of a larger PEO coil expansion upon complexation of SDoD than in the case of SDS. An increase in the polymer surface favors the binding of SDoD to PEO in aqueous solution. This conclusion is supported by the results of the viscometric studies of PEO-surfactant solution.
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Affiliation(s)
- Dino Zanette
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040-900, Brazil
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