Thematische Bibliographien / Macromolecular surfactants

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Auswahl der wissenschaftlichen Literatur zum Thema „Macromolecular surfactants“

Autor: Grafiati

Veröffentlicht am 29. Juni 2021

Zuletzt aktualisiert am 9. Februar 2022

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Zeitschriftenartikel zum Thema "Macromolecular surfactants"

Durand, Alain, und Emmanuelle Marie. „Macromolecular surfactants for miniemulsion polymerization“. Advances in Colloid and Interface Science 150, Nr. 2 (September 2009): 90–105. http://dx.doi.org/10.1016/j.cis.2009.07.002.

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Schädler, V., P. Lindner, U. Wiesner und E. Mendes. „Ionic and Zwitterionic Model Macromolecular Surfactants“. Journal of Physical Chemistry B 102, Nr. 38 (September 1998): 7316–18. http://dx.doi.org/10.1021/jp982041b.

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Garti, Nissim, und Abraham Aserin. „Double emulsions stabilized by macromolecular surfactants“. Advances in Colloid and Interface Science 65 (Mai 1996): 37–69. http://dx.doi.org/10.1016/0001-8686(95)00289-8.

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Kudaibergenov, Sarkyt E. „Macromolecular complexes of polyampholytes“. Pure and Applied Chemistry 92, Nr. 6 (25.06.2020): 839–57. http://dx.doi.org/10.1515/pac-2019-1104.

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AbstractThe macromolecular complexes of random, regular, graft, block and dendritic polyampholytes with respect to transition metal ions, surfactants, dyes, polyelectrolytes, and proteins are discussed in this review. Application aspects of macromolecular complexes of polyampholytes in biotechnology, medicine, nanotechnology, catalysis are demonstrated.

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Mendes, E., V. Schädler, C. M. Marques, P. Lindner und U. Wiesner. „Electrostatics in the self-assembly of macromolecular surfactants“. Europhysics Letters (EPL) 40, Nr. 5 (01.12.1997): 521–26. http://dx.doi.org/10.1209/epl/i1997-00498-4.

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Joram, Anju, Rashmi Sharma und Arun K. Sharma. „Synthesis, Spectral and Thermo-Gravimetric Analysis of Novel Macromolecular Organo-Copper Surfactants“. Open Chemistry Journal 5, Nr. 1 (30.11.2018): 145–57. http://dx.doi.org/10.2174/1874842201805010145.

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Background: The present paper highlights: Synthesis of copper surfactants derived from edible oils i.e. Groundnut & Sesame and non-edible oils i.e. Neem & Karanj. Methods: Spectral studies (IR, NMR) have been carried out to understand the structural insight of the surfactants synthesized. Results and Conclusion: Thermogravimetric analysis of copper surfactants derived from Groundnut, Sesame, Neem & Karanj has been done to confirm the thermal decomposition/stability. Kinetic parameter i.e. activation energy and thermodynamic parameters i.e. Gibbs free energy, entropy and enthalpy were calculated by five different well-known equations namely Freeman Carroll, Coats - Redfern, Horowitz – Metzger, Broido, and Piloyan –Novikova.

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Jacobs, Jaco, Nicholas Gathergood, Johan P. A. Heuts und Andreas Heise. „Amphiphilic glycosylated block copolypeptides as macromolecular surfactants in the emulsion polymerization of styrene“. Polymer Chemistry 6, Nr. 25 (2015): 4634–40. http://dx.doi.org/10.1039/c5py00548e.

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Bio-inspired amphiphilic block copolymer surfactants fully derived from amino acids and sugars are synthesised. The materials are successfully employed in the synthesis of polystyrene latexes by emulsion polymerization.

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Schädler, V., C. Nardin, U. Wiesner und E. Mendes. „Micellization of Model Macromolecular Surfactants as Studied by Static Light Scattering“. Journal of Physical Chemistry B 104, Nr. 21 (Juni 2000): 5049–52. http://dx.doi.org/10.1021/jp9937205.

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Coulembier, Olivier, Jessica Ghisdal, Philippe Degée und Philippe Dubois. „Benzyl β-malolactonate: synthesis, copolymerization and design of novel biodegradable macromolecular surfactants“. Arkivoc 2007, Nr. 10 (02.12.2006): 57–70. http://dx.doi.org/10.3998/ark.5550190.0008.a07.

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Kaewprapan, Kulthida, Francis Baros, Emmanuelle Marie, Pranee Inprakhon und Alain Durand. „Macromolecular surfactants synthesized by lipase-catalyzed transesterification of dextran with vinyl decanoate“. Carbohydrate Polymers 88, Nr. 1 (März 2012): 313–20. http://dx.doi.org/10.1016/j.carbpol.2011.12.010.

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Dissertationen zum Thema "Macromolecular surfactants"

Cashion, Matthew Paul. „Photo-reactive Surfactant and Macromolecular Supramolecular Structures“. Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/27714.

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For the first time nonwoven fibrous scaffolds were electrospun from a low molar mass gemini ammonium surfactant, N,N–-didodecyl-N,N,N–,N–-tetramethyl-N,N–-ethanediyl-di-ammonium dibromide (12-2-12). Cryogenic transmission electron microscopy (cryo-TEM) and solution rheological experiments revealed micellar morphological transitions of 12-2-12 in water and water:methanol (1:1 vol). Electrospinning efforts of 12-2-12 from water did not produce fibers at any concentration, however, electrospinning 12-2-12 in water:methanol at concentrations greater than 2C* produced, hydrophilic continuous fibers with diameters between 0.9 and 7 μM. Photo-reactive surfactants were synthesized to electrospin robust surfactant membranes. Before electrospinning it was important to fundamentally understand the structure-property relationship of gemini surfactants. The thermal and solution properties were explored for a series of ammonium gemini surfactants using differential scanning calorimetry (DSC), polarized light microscopy (PLM), and conductivity experiments. The Kraft temperature (Tk) was measured in water and water:methanol (1:1 vol) to investigate the influence of solvent on the surfactant solution properties. Other experiments investigate how associated photo-curable architectures are applicable in macromolecular architectures, to gain a fundamental understanding of how hydrogen bonding associations influence the photo-reactivity of functionalized acrylic copolymers. Novel hot melt pressure sensitive adhesives (HMPSAs) were developed from acrylic terpolymers of 2-ethylhexyl acrylate (EHA), 2-hydroxyethyl acrylate (HEA), and methyl acrylate (MA) functionalized with hydrogen bonding and photo-reactive functionalities. The synergy of hydrogen bonding and photo-reactivity resulted in higher peel values and rates of cinnamate photo-reactivity with increasing urethane concentration. Random copolymers of poly(n-butyl acrylate (nBA)-co-2-hydroxyethyl methacrylate (HEMA)) were functionalized with hydrogen bonding and photo-reactive groups to explore the photo-curing of associated macromolecular architectures. The influence of urethane hydrogen bonding on the photo-reactivity of cinnamate-functionalized acrylics was investigated with photo-rheology and UV-vis spectroscopy. Cinnamate-functionalized samples displayed an increase in modulus with exposure time, and the percentage increase in modulus decreased as the urethane content increased. The synergy of hydrogen bonding and photo-reactive groups resulted in higher rates of cinnamate photo-reactivity with increasing urethane concentration. Electrospun fibers were in situ photo-crosslinked to develop fibrous membranes from cinnamate functionalized low Tg acrylics. Electrospinning was conducted approximately 55 °C above the Tg of the cinnamate acrylate and the electrospun fibers did not retain their fibrous morphology without photo-curing. However, electrospun fibers were collected that retained their fibrous morphology and resisted flow when in situ photo-cured during electrospinning. The intermolecular photo-dimerization of cinnamates resulted in a network formation that prevented the low Tg cinnamate acrylate from flowing.
Ph. D.

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Su, Hao. „Macromolecular Structure Evolution of Giant Molecules Via "Click" Chemistry: Asymmetric Giant Gemini Surfactants Based on Polyhedral Oligomeric Silsesquioxane“. University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1398727473.

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Burridge, Kevin Michael. „Application and characterization of polymer-protein and polymer-membrane interactions“. Miami University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami1624882451668094.

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Zhang, Huixian. „Multicomponent diffusion of macromolucule-additive and drug-surfactant aqueous ternary systems“. [Fort Worth, Tex.] : Texas Christian University, 2009. http://etd.tcu.edu/etdfiles/available/etd-04292009-164431/unrestricted/Zhang.pdf.

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Ghoreishi, Sayed Mehdi. „Electrochemical studies associated with the interaction between ionic surfactants and a number of different macromolecules“. Thesis, University of Salford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265530.

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Baltaci, Berk. „Sytnhesis And Characterization Of Nano Zinc Borate And Its Usage As A Flame Retardant For Polymers“. Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612701/index.pdf.

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The objectives of this study are to synthesize sub-micron sized zinc borate and to use them with other flame retardant additives in poly(ethylene terephthalate) (PET) based composites. The study can be divided into two parts. In the first part, it was aimed to synthesize sub-micron sized zinc borate (2ZnO.3B2O3.3.5H2O) with the reaction of zinc oxide and boric acid. For this purpose, low molecular weight additives or surfactants were used in the syntheses to prevent the agglomeration and to decrease particle size. Effect of type of surfactant and its concentration
effect of using nano-sized zinc oxide as reactant on the synthesis, properties and morphology of 2ZnO.3B2O3.3.5H2O were investigated. Synthesized zinc borates were characterized by X-Ray diffraction (XRD), Scanning Electron Microscope (SEM) and Thermogravimetric Analysis (TGA). The results were compared with a commercial zinc borate, Firebrake (FB). Characterization results showed that at least in one dimension sub-micron size was obtained and synthesized zinc borates did not lose their hydration water until the process temperature of the composites. In the second part of the study, PET based composites, which mainly included synthesized sub-micron sized zinc borates were prepared by using a co-rotating twin screw extruder and injection molding machine. Synergist materials such as boron phosphate (BP) and triphenyl phosphate (TPP) were also used in the composite preparation. The composites were characterized in terms of flammability and mechanical properties. Flammability of composites was determined by using a Limiting Oxygen Index (LOI) test. Mechanical properties such as tensile strength, elastic modulus, elongation at break and impact strength were also studied. According to LOI and impact tests, the composites containing 3 wt. % BP and 2 wt. % zinc borate which was modified with poly(styrene-co-maleic anhydride), 2PSMA05/3BP and 2PSMA1/3BP have higher LOI and impact values when compared to neat PET.

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Chaaban, Abdul Amir. „Etude de l'organisation structurale des nanocolloïdes humiques“. Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30062/document.

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L'organisation des substances humiques à l'échelle moléculaire reste une question largement débattue, et à ce jour, il n'a pas été possible de trancher entre une structure polymérique en pelotte plus ou moins flexible et un assemblage supramoléculaire de molecules hétérogènes associées par des liaisons hydrogènes et des interactions hydrophobes. Dans cette thèse, nous étudions la reconformation induite par l'addition de tensio-actifs cationiques (Chlorure de C n-trimethylammonium) sur une série de substances humiques (acides fulvique et humiques) ainsi que sur de la matière organique naturelle contenue dans des eaux noires. Des mesures de turbidité, de diffusion de lumière, mobilité électrophorétique, tension de surface, spectroscopie de fluorescence, diffusion des neutrons aux petits angles, et cryomicroscopie à transmission, permettent de decrire les complexes formés entre le tensio-actif et la matière humique. L'association matière humique/tensio-actif dépend à la fois d'interactions d'origine électrostatique et hydrophobe. Une série de structures moléculaires, vésicules, disques, globules, pseudo-micelles, est observée en cryomicroscopie selon la concentration en surfactant. La séquence obtenue est cohérente avec un système catanionique, en d'autres termes une partie de la matière humique est amphiphile et s'organise en assemblage supramoléculaire. L'addition de tensio-actif modifie également fortement le spectre de fluorescence de la matière humique, les nouvelles bandes bien résolues présentes sur le spectre indiquant une restructuration majeure de l'assemblage supramoléculaire
The structural organization of humic nanocolloids remains a matter of harsh debate, and surprisingly, it is yet not possible to decide between an arrangement of the humic matter in the form of randomly coiled macromolecules more or less connected, and a supramolecular organization of small heterogeneous molecules linked by hydrogen bonds and hydrophobic interactions. In this study, we investigate the reconformation induced by the addition of cationic surfactants (C n-trimethylammonium chloride) of varying alkyl chain length with a series of humic substances (HS) and Dissolved Organic matter (DOM) from two blackwater rivers of the Central Amazon. Turbidity measurements, Dynamic light scattering, electrophoretic mobility, surface tension, fluorescence spectroscopy, small angle neutron scattering and cryo-transmission electron microscopy (cryo-TEM), are combined to describe the Humic Substance/Surfactant complexes obtained. The association between the oppositely charged HS and cationic surfactant is driven by both electrostatic and hydrophobic interactions. A variety of molecular structures, unilamellar vesicles, disks, globules, spheroidal micelles, are visualized by cryo-TEM depending on surfactant concentration. Such sequence, consistent with those displayed by catanionic systems, provides an independent confirmation of both the amphiphilic nature of HS and of its supramolecular organization. In addition, the molecular rearrangement was investigated using single-scan fluorescence emission spectra spectroscopy, thus identifying the chemical groups responsible for the fluorescence properties in HS and DOM. The addition of cationic surfactant to HS/DOM unveils an unexpected fine structure of humic-like fluorescence through new emission peaks that are not evidenced in the references HS/DOM. An enhanced protein-like fluorescence indicating major restructuration and structural stacking/de-stacking is observed. All our results support a supramolecular organization of humic substances and DOM

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Wang, Lianjie. „New biobased chemicals from HMF and GMF : Applications of Morita-Baylis-Hillman reaction and nitrone 1,3-dipolar cycloaddition“. Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI026.

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Ces dernières années, la conception de nouveaux produits de chimie fine à partir de biomasse et de molécules plateformes est devenue un domaine de recherche très actif. Le 5-hydroxyméthylfurfural (HMF) s’est révélé une des briques les plus prometteuses parmi les dérivés des hydrates de carbone, en raison de la richesse de sa chimie liée à son haut niveau de fonctionalisation. Son analogue glucosylé, bien que moins disponible, le glucosyloxyméthylfurfural (GMF), est également un aldéhyde biosourcé furanique intéressant et capable d’être transformé en une multitude de produits chimiques nouveaux conservant un motif glucidique complet. Cette thèse est une contribution à l’utilisation de ces deux briques moléculaires dans la conception de nouveaux produits destinés à la chimie fine, par le biais de deux réactions, la réaction de Morita-Baylis-Hillman (MBH) et la cycloaddition de nitrones. L’application de cette stratégie dans la conception de nouveaux tensioactifs a aussi été étudiée. Premièrement, nous avons étudié le cas de la réaction de MBH du HMF et GMF avec les cycloalcenones dans l’eau pure. De nouvelles stuctures hautement fonctionnalisées ont pu être ainsi obtenues pour la première fois dans des conditions douces et sures, et dans un fort niveau d’économie d’atomes. Deuxièmement, nous avons étudié la possibilité de conduire la réaction de MBH du HMF et du GMF avec des acrylates et autres alcènes déficients en électrons en absence totale de solvant. Les réactions de cycloaddition 1,3-dipolaire des nitrones du HMF et du GMF offrent de nouvelles voies synthétiques vers les isoxazolidines biosourcées. La séquence de reactions « formation de la nitrone-cycloadditiopn dipolaire » peut être effectuée soit dans une approche à plusieurs composants (réaction multicomposants), soit en deux étapes successives. Dans une dernière partie, nous avons étudié la possibilité d’utiliser ces deux routes pour la conception de nouveaux tensioactifs dans le cadre d’une collaboration avec la Prof Véronique RATAJ et le Dr Fermin ONTIVEROS de l’équipe CISCO de l’unité de recherche UCCS à Lille. Les résultats préliminaires de l’évaluation physicochimique ont montré un réel intérêt de ces composés dont les propriétés sont facilement ajustables par des modifications structurales simples et qui obtenus par une séquence directe et originale
The design of new fine chemicals from biomass and platform molecules has recently become a very active field of research. 5-Hydroxymethylfurfural (HMF) is considered as one of the most promising renewable building blocks derived from carbohydrates, due to the rich chemistry offered by its high level of functionality. Its glucosylated analogue glucosyloxymethylfurfural (GMF), though much less available, is also an interesting biobased furanic aldehyde able to provide a range of novel architectures which include a remaining full carbohydrate moiety. The present thesis is a contribution to the use of these two building blocks for the design of novel fine chemicals, using notably two reactions, namely the Morita-Baylis-Hillman reaction, and the cycloaddition of nitrones. The application of these strategies for designing novel surfactants was also investigated. First, we investigated the MBH reaction of HMF and GMF with cycloalkenones using pure water as solvent. New functionalized scaffolds have been prepared in mild and safe conditions with remarkable atom-economy by this route for the first time. Then we investigated the possibility to run MBH reactions of HMF and GMF with acrylates or other alkenes in absence of any solvent. The 1,3-dipolar cycloaddition reactions of nitrones obtained from HMF and GMF offer novel synthetic routes towards biobased isoxazolidines. The sequence “nitrone formation-cycloaddition reaction” can be performed either in a multicomponent approach or in a stepwise one. In the last part, we addressed the possibility to use these two routes for the design of novels biobased surfactants, in the frame of a collaboration with Prof Véronique RATAJ and Dr Fermin ONTIVEROS of the CISCO team of the UCCS research unit in Lille. Preliminary results on their surfactants properties have been obtained, and indicate a real interest of these compounds which exhibit easily adjustable properties based on simple structural variations, and which are obtained in an easy straightforward and original synthetic sequence

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Antunes, Filipe João Cotovio Eufrásio. „Mixed solutions of polymers and surfactants : relation between rheology and nanostructure“. Doctoral thesis, 2006. http://hdl.handle.net/10316/2039.

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Tese de doutoramento em Química (Química Macromolecular) apresentada à Univ. de Coimbra
A presente investigação explora estudos reológicos de sistemas de polímeros associativos e agregados de tensioactivos ou um segundo polímero associativo. O controlo do comportamento reológico destes sistemas, nomeadamente o ajuste da viscosidade através de variações de temperatura, sal ou concentração, é de um enorme interesse em várias áreas de aplicação. Para atingir este objectivo é necessário primeiramente entender os mecanismos por detrás das associações entre polímero e tensioactivo. Nestes sistemas mistos é comum verificar um aumento de viscosidade com a concentração de tensioactivo, devido a efeitos de interconecções. Contudo, descobrimos que esta situação poderá ser invertida quando o agregado de tensioactivo é uma microemulsão composta por grupos oxietileno e os agregados possuem uma concentração suficientemente alta de modo a estarem relativamente próximos uns dos outros. A adição de tensioactivo diminui a viscosidade e isso foi interpretado como sendo devido a uma diminuição do tempo de vida dessas interconecções. O mesmo polímero foi adicionado a vesículos cataniónicos e a importância do tamanho e carga do vesículo foi analisada. Concluiu--se que o primeiro parâmetro é fundamental para a reologia do sistema. Por outro lado, alterações na carga global do vesículo não influenciam as propriedades reológicas. A arquitectura do polímero é igualmente importante, com maiores viscosidades a serem detectadas em sistemas com polímeros com grupos hidrofóbicos maiores. Os vesículos cataniónicos foram posteriormente associados a polielectrólitos, dois derivados da celulose com diferentes densidades de carga; as interconecções mais duradouras foram encontradas nos sistemas com o polímero mais carregado, enquanto que se verificou um maior número de interconecções nos sistemas com o polímero modificado hidrofobicamente. Os estudos de microestrutura indicam que os dois polímeros afectam a estabilidade dos vesículos, com formação de vesículos facetados. Polímeros com uma baixa densidade de carga induzem cristalização das cadeias do tensioactivo, enquanto que polímeros com densidade de carga suficientemente elevada promovem segregação no interior dos vesículos. Finalmente, considerámos misturas de polielectrólitos de carga oposta. Foi descoberto que a típica separação de fase em sistemas de polímeros opostamente carregados é bastante reduzida com a presença de modificação hidrofóbica nos polímeros. Nestes casos, a separação de fases é apenas detectada na zona de neutralização de cargas. Também foi observado que, se a densidade de um dos polímeros depende do pH, a associação pode ser controlada por alterações deste parâmetro. A força da interacção electrostática pode também ser controlada pela adição de sal. Dependendo da razão de mistura entre os polielectrólitos, o aumento da força iónica pode conduzir a uma separação de fases, a uma aumento ou diminuição de viscosidade.

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Dias, Rita de Sousa. „DNA - Surfactant Interactions“. Doctoral thesis, 2004. http://hdl.handle.net/10316/2037.

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Neste trabalho de dissertação investigou-se a interacção entre o ácido desoxirribonucleico (ADN) e moléculas anfifílicas de carga oposta. É ainda estudada a dissociação dos complexos formados pela adição de tensioactivos de carga negativa. Foi investigada a precipitação do ADN com tensioactivo de carga oposta para diferentes concentrações de sal, temperatura e hidrofobicidade dos tensioactivos. Verificou-se que as moléculas de ADN desnaturadas precipitam para menores concentrações de DTAB do que as moléculas de dupla-hélice. Foi observada a possibilidade de dissociar os complexos formados pelo ADN-tensioactivo catiónico pela adição de surfactantes de carga negativa, originando agregados mistos de tensioactivo. Verificou-se que, usando molécula anfifílicas aniónicas com cadeias hidrofóbicas mais longas, a dissociação é mais eficiente. No entanto, não há dependência da hidrofobicidade correspondente ao tensioactivo positivo. Os resultados sugerem ainda ser possível o controlo dos agregados formados pelos tensioactivos de carga oposta, através do conhecimento do diagrama de fases. Foram estudados policatiões de tamanho médio como agentes de compactação do ADN por simulação de Monte Carlo. Os resultados obtidos mostram que o grau de compactação é determinado pelo tamanho e o número das cadeias positivas. O aumento do número das moléculas de agente compactante, ou do número de cargas neste, causa o colapso súbito da molécula do polianião. A compactação é associada com o facto dos policatiões promoverem ligações entre diferentes partes da cadeia do polímero negativamente carregado. Foi também observado que a interacção para razões de carga policatião/polianião bastante abaixo de 1, produz um pequeno grau de segregação dentro da cadeia, permitindo uma translação significativa do agente compactante ao longo da cadeia. No entanto não é necessário atingir a neutralização de cargas do sistema para obter uma apreciável compactação do polianião.

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Bücher zum Thema "Macromolecular surfactants"

Lindman, B., J. B. Rosenholm und P. Stenius, Hrsg. Surfactants and Macromolecules: Self-Assembly at Interfaces and in Bulk. Darmstadt: Steinkopff, 1990. http://dx.doi.org/10.1007/bfb0118233.

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Lindman, B., P. Stenius und J. B. Rosenholm. Surfactants and Macromolecules: Self-Assembly at Interfaces and in Bulk. Springer, 1991.

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Kilian, H. G. Surfactants And Macromolecules: SELF-ASSEMBLY AT INTERFACES AND IN BULK (PROGRESS IN COLLOID & POLYMER SCIENCE). Herausgegeben von H. G. Kilian. Springer, 1990.

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Progress in Colloid and Polymer Science. Springer-Verlag Telos, 2001.

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Imre, Dékány, und Kolloid-Gesellschaft International Conference, Hrsg. Adsorption and nanostructures. Berlin: Springer, 2001.

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Buchteile zum Thema "Macromolecular surfactants"

Cramail, Henri, Eric Cloutet und Karunakaran Radhakrishnan. „Polymeric Surfactants“. In Macromolecular Engineering, 2181–223. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527631421.ch52.

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Kim, Oh-Kil, und Ling-Siu Choi. „Fluorescence Probe Studies of Poly(acrylic acid) Interchain Complexation Induced by High Shear Flow and Influence of Cationic Surfactants on the Complexation“. In Macromolecular Complexes in Chemistry and Biology, 215–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78469-9_13.

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Cates, M. E. „Theory of the Dynamics of Entangled Wormlike Surfactant Micelles“. In Space-Time Organization in Macromolecular Fluids, 116–23. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-83948-1_13.

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Voss, T., H. Eistetter, K. P. Schäfer und J. Engel. „The Macromolecular Organization of Canine Lung Surfactant Protein SP 28–36: Structural Homology with the Complement Factor C1q“. In Surfactant Replacement Therapy, 344–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-73305-5_41.

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Tanaka, Fumihiko. „Polymer-surfactant interaction in thermoreversible gels“. In Molecular Interactions and Time-Space Organization in Macromolecular Systems, 81–89. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-60226-9_9.

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Ciferri, Alberto, und Angelo Perico. „Association of Polyelectrolytes to Surfactants and Supramolecular Assemblies: Competitive Role of Chain Rigidity and Assembly Stability“. In Ionic Interactions in Natural and Synthetic Macromolecules, 235–66. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118165850.ch8.

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Anto, Rincy, Saheli Sanyal, Shubhankar Bhattacharjee und Uttam K. Bhui. „Optical Characteristics of Petroleum Crudes–Surfactant–Brine Solutions: Understanding Molecular Level Interaction for Designing Injection Fluids for Enhanced Oil Recovery“. In Macromolecular Characterization of Hydrocarbons for Sustainable Future, 59–73. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6133-1_5.

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Garti, Nissim, und Abraham Aserin. „Double Emulsions Stabilized by Macromolecular Surfactants“. In Surfactants in Solution, 297–332. CRC Press, 2020. http://dx.doi.org/10.1201/9781003067580-21.

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Garti, Nissim, und Abraham Aserin. „Double Emulsions Stabilized by Macromolecular Surfactants“. In Micelles, Microemulsions, and Monolayers, 333–62. Routledge, 2018. http://dx.doi.org/10.1201/9780203747339-14.

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Cohen Stuart, Martinus. „Macromolecular Adsorption“. In Surfactant Science. CRC Press, 2003. http://dx.doi.org/10.1201/9780824747343.pt1.

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Konferenzberichte zum Thema "Macromolecular surfactants"

Zhong, X. M., W. M. Yao, J. Y. Chen, Y. H. Lai, X. S. Lin, L. J. Kong und X. Wu. „Network Assembled Structures from a Series of Macromolecular Surfactants“. In International Conference on Computer Information Systems and Industrial Applications. Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/cisia-15.2015.134.

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Barz, Dominik P. J., Michael J. Vogel und Paul H. Steen. „Generation of Electrokinetic Flow in a Doped Non-Polar Liquid“. In ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels collocated with 3rd Joint US-European Fluids Engineering Summer Meeting. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30258.

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The presence of considerable amounts of free charge dispersed in a liquid is the basis for electrokinetic phenomena which are related to the existence of an electrical double layer (EDL). In polar liquids, the dissociation of electrolytes into ionic species is well understood and numerous electrokinetic phenomena are known; a good overview is given by e.g. Delgado et al. [1]. In nonpolar liquids it is known that electrical charges can exist as well. The presence of these electrical charges is utilized, for example, in colloid science to stabilize particle suspensions [2]. For this purpose, surfactants are added which enhance the zeta potential of the particles in order to prevent their agglomeration. Additionally to the manipulation of surface charges, it is reported that the electrical conductivity of nonpolar liquids essentially increases when surfactant is added and traces of water are present [3]. Such ternary solutions of nonpolar liquid-water-surfactant are known to contain surfactant agglomerations, so-called inverted micelles with a size of several nanometers, detectable for instance by quasielastic lightscattering measurements. Figure 1 sketches the generation and structure of an inverted micelle. In general, surfactants are macromolecules consisting of different functional groups, e.g. a polar “head” and a nonpolar “tail”. Above the critical micelle concentration (cmc), surfactant molecules attach with their polar head at a water droplet forming the inverted micelle. It is assumed that electrical charges are dissolved in the polar core of the inversed micelles enabling opposite charges to be held sufficiently far apart and preventing an agglomeration of different micelles [4].

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Guetni, Imane, Claire Marlière und David Rousseau. „Chemical EOR in Low Permeability Sandstone Reservoirs: Impact of Clay Content on the Transport of Polymer and Surfactant“. In SPE Western Regional Meeting. SPE, 2021. http://dx.doi.org/10.2118/200784-ms.

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Abstract Application of chemical enhanced oil recovery (C-EOR) processes to low-permeability sandstone reservoirs (in the 10-100 mD range) can be very challenging as strong retention and difficult in-depth propagation of polymer and surfactant can occur. Transport properties of C-EOR chemicals are particularly related to porous media mineralogy (clay content). The present experimental study aimed at identifying base mechanisms and providing general recommendations to design economically viable C-EOR injection strategies in low permeability clayey reservoirs. Polymer and surfactant injection corefloods were conducted using granular packs (quartz and clay mixtures) with similar petrophysical characteristics (permeability 70-130 mD) but having various mineralogical compositions (pure quartz sand, sand with 8 wt-% kaolinite and sand with 8 wt-% smectite). The granular packs were carefully characterized in terms of structure (SEM) and specific surface area (BET). The main observables from the coreflood tests were the resistance and residual resistance factors generated during the chemical injections, the irreversible polymer retention and the surfactant retention in various injection scenarios (polymer alone, surfactant alone, polymer and surfactant). A first, the impact of the clay contents on the retention of polymer and surfactant considered independently was examined. Coreflood results have shown that retention per unit mass of rock strongly increased in presence of both kaolinite and smectite, but not in the same way for both chemicals. For polymer, retention was about twice higher with kaolinite than with smectite, despite the fact that the measured specific surface area of the kaolinite was about 5 times less than that of the smectite. Conversely, for surfactant, retention was much higher with smectite than with kaolinite. Secondly, the impact of the presence of surfactant on the polymer in-depth propagation and retention was investigated in pure quartz and kaolinite-bearing porous media. In both mineralogies, the resistance factor quickly stabilized when polymer was injected alone whereas injection of larger solution volumes was required to reach stabilization when surfactant was present. In pure quartz, polymer retention was shown, surprisingly, to be one order of magnitude higher in presence of surfactant whereas with kaolinite, surfactant did not impact polymer retention. The results can be interpreted by considering adsorption-governed retention. The mechanistic pictures being that (a) large polymer macromolecules are not able to penetrate the porosity of smectite aggregates, whereas surfactant molecules can, and (b) that surfactant and polymer mixed adsorbed layers can be formed on surfaces with limited affinity for polymer. Overall, this study shows that C-EOR can be applied in low permeability reservoirs but that successful injection strategies will strongly depend on mineralogy.

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