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Dissertations / Theses on the topic 'Nonionic surfactants'

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Published: 4 June 2021

Last updated: 26 July 2025

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1

Uppgård, Lise-Lott. "Nonionic surfactants : A multivariate study." Doctoral thesis, Umeå universitet, Kemi, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-12.

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In this thesis technical nonionic surfactants are studied using multivariate techniques. The surfactants studied were alkyl ethoxylates (AEOs) and alkyl polyglucosides (APGs). The aquatic toxicity of the surfactants towards two organisms, a shrimp and a rotifer, was examined. The specified effect was lethality, LC50, as indicated by immobilisation. In a comparative study, the LC50 values obtained were used to develop two different types of model. In the log P model the toxicity was correlated to log P alone, while in the multivariate model several physicochemical variables, including log P, we

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2

Dimitrova, Galya Tzvetanova. "Phase behaviour of nonionic surfactants." Thesis, Imperial College London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244794.

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3

Fraser, Douglas. "A fluorescence study of nonionic surfactants." Thesis, Lancaster University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.254200.

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4

Harvey, Richard Douglas. "Biophysical characterisation of vesicles containing nonionic surfactants." Thesis, King's College London (University of London), 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396320.

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5

Fitzgerald, Paul A. "Solution behaviour of polyethylene oxide, nonionic gemini surfactants." Connect to full text, 2002. http://setis.library.usyd.edu.au/adt/public_html/adt-NU/public/adt-NU20031219.162500/index.html.

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6

Corbyn, Conrad Paul. "Interactions of cationic and nonionic surfactants with DNA." Thesis, University of Hull, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.402989.

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7

FitzGerald, Paul Anthony. "Solution Behaviour of Polyethylene Oxide, Nonionic Gemini Surfactants." Thesis, The University of Sydney, 2002. http://hdl.handle.net/2123/504.

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In recent years there has been increasing interest in novel forms of surfactants. Of particular interest are gemini surfactants, which consist of two conventional surfactants joined by a spacer at the head groups, as they exhibit lower critical micelle concentrations than can be achieved by conventional surfactants. In this work, the self-assembly behaviour of several nonionic gemini surfactants with polyethylene oxide head groups (GemnEm, where n (= 20) is the number of carbons per tail and m (= 10, 15, 20 and 30) is the number of ethylene oxides per head group) were investigated. The Crit

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8

FitzGerald, Paul Anthony. "Solution Behaviour of Polyethylene Oxide, Nonionic Gemini Surfactants." University of Sydney. Chemistry, 2002. http://hdl.handle.net/2123/504.

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In recent years there has been increasing interest in novel forms of surfactants. Of particular interest are gemini surfactants, which consist of two conventional surfactants joined by a spacer at the head groups, as they exhibit lower critical micelle concentrations than can be achieved by conventional surfactants. In this work, the self-assembly behaviour of several nonionic gemini surfactants with polyethylene oxide head groups (GemnEm, where n (= 20) is the number of carbons per tail and m (= 10, 15, 20 and 30) is the number of ethylene oxides per head group) were investigated. The Crit

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9

French, Edward James. "The enhancement of percutaneous absorption by nonionic surfactants." Thesis, University of Bath, 1991. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.279431.

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10

Powell, Matthew R. "Nuclear magnetic resonance studies of emulsions." Thesis, University of Nottingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243476.

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11

Colegate, Daniel. "Structure-kinetics relationships in micellar solutions of nonionic surfactants." Thesis, Durham University, 2009. http://etheses.dur.ac.uk/2017/.

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Micellar surfactant solutions are highly complex systems containing aggregates of different shapes and sizes all in dynamic equilibrium. I have undertaken an investigation into the kinetic processes that occur in micellar surfactant solutions subjected to both bulk perturbations and close to expanding surfaces. Supporting information regarding the equilibrium properties of surfactant micelles has been acquired using several experimental techniques including small-angle neutron scattering (SANS) and pulsed field gradient spin echo (PFGSE) nmr. Bulk exchange kinetics between micelles and monomer

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12

Moore, Suzanne Louise. "The mechanisms of antibacterial action of some nonionic surfactants." Thesis, University of Brighton, 1997. https://research.brighton.ac.uk/en/studentTheses/35414631-9ae5-4dc4-afd4-6f724fe9a7f6.

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Antibacterial agents are composed of a diverse group and many such agents have entered common usage through experience with little information on their mechanism of action. Study of the mechanism of action of an antimicrobial agent provides an insight into resistance mechanisms, toxicological problems and the design and development of new agents or combinations. The primary target of most antimicrobial agents (excluding antibiotics) is the cytoplasmic membrane and associated enzymes. Membrane-active agents can cause a change in the fluidity and/or permeability of the cytoplasmic membrane. Such

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13

Martin, Charlotte Anne. "Sorption and transport of selected nonionic surfactants in soil systems." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/19118.

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14

Chang, Eric Kenneth. "Coupled sorption and transport of nonionic surfactants in natural soils." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/21257.

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15

Persson, Marcus. "Surfactants at non-polar surfaces." Doctoral thesis, KTH, Chemistry, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3444.

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<p>The aim of this thesis work was to investigate theadsorption of surfactants to different nonpolar interfaces.Particularly, the effects of the polar group and the nature ofthe hydrophobic interface were elucidated. The interfacialbehavior of the liquid-vapor interface was investigated bymeans of surface tension measurements. Here the effect of thepolar group and the hydrocarbon chain length was investigatedin a systematic manner. It was found that the shorter of thetwo chains examined, decyl, generated a larger surface pressurecontribution than the longer, dodecyl. Furthermore, the sugarbase

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16

Stoyanov, Simeon. "Theory and simulation of interfacial effects and phase behavior of nonionic surfactants." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=967284503.

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17

Jewett, Brent Nicholas. "Analysis of anionic and nonionic surfactants by liquid introduction mass spectrometry techniques." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq24859.pdf.

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18

Moorkanikkara, Srinivas Nageswaran. "Development of novel methodologies to analyze the adsorption kinetics of nonionic surfactants." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/42166.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 2007.<br>Includes bibliographical references.<br>When an aqueous surfactant solution is exposed to a clean water/air surface, it takes a finite time for the surfactant molecules to physically transport from the bulk aqueous solution to the surface in order to adsorb and reduce the surface tension. The time scales associated with the reduction in surface tension can vary between milliseconds to hours depending on the surfactant type and its concentration. Accordingly, development of a fundamental understandin

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19

Akhtar, Mahmood. "Microemulsions formation, stability and their characterisations." Thesis, Brunel University, 1996. http://bura.brunel.ac.uk/handle/2438/5004.

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This thesis is concerned with aspects of the surface and colloid chemistry of various microemulsion systems stabilised by pure nonionic surfactants and alcohol as well as mixtures of nonionic and anionic surfactants. Phase equilibria and interfacial characteristics of the systems are studied with a view to their potential usefulness for enhanced oil recovery, in which salinity and temperature are important parameters. The equilibrium microemulsion phases are scanned at different temperatures and salinities and thus interfacial boundaries can be determined and optimum salinity scans can be perf

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20

Yeh, Daniel H. "Influence of nonionic surfactants on the bioavailability and microbial reductive dechlorination of hexachlorobenzene." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/20200.

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21

Morris, Jane Susan. "The structure and kinetics of oil-in-water microemulsions stabilised by nonionic surfactants." Thesis, University of Hull, 1995. http://hydra.hull.ac.uk/resources/hull:3707.

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This thesis is concerned with the behaviour of the single phase (10) alkane oil-in- water (01W) microemulsions stabilised by nonionic surfactants of the general structure H-(CH2)n(OCH2CH2)m-OH, abbreviated to CnEm. The aims were to attempt to characterise their behaviour in terms of the effect of the different constituents n, m, and alkane oil chain length (x).Initially the limiting temperature phase boundaries of the 10 region were established by measurements of turbidity. Turbidity was found to be at a minimum at the lower temperature phase boundary (the solubilisation phase boundary, SPB),

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22

Kjellin, Mikael. "Structure-Property Relationships of Surfactants at Interfaces and Polyelectrolyte-Surfactant Aggregates." Doctoral thesis, KTH, Chemistry, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3299.

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<p>The first part of this thesis is concerned with thestructure-property relationships in nonionic surfactantsystems. The main aim was to investigate how the surfactantstructure influences the adsorption at interfaces andinteractions between surfactant coated interfaces.Particularly, the effect of the structure of the surfactantheadgroups was investigated. These were sugar-based headgroupwith varying size and flexibility and poly(ethylene oxide)based headgroups with or without an additional amide or estergroup. The hydrophobic part of the surfactant consisted mostlyof straight alkyl chains, ex

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23

McRae, Kenneth James. "The interaction of certain monoazo acid dyes and related compounds with certain nonionic surfactants." Thesis, University of the West of Scotland, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.346455.

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24

Sultana, Sakina. "Comparison between polyvinylpyrrolidone-based and polyoxazoline nonionic surfactants : their physico-chemical and solubilisation behaviour." Thesis, King's College London (University of London), 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367734.

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25

Bianco, Carolina. "Role of nonionic surfactants in promoting the folding and stability of integral membrane proteins." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 317 p, 2008. http://proquest.umi.com/pqdweb?did=1612981801&sid=12&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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Thesis (Ph.D.)--University of Delaware, 2008.<br>Principal faculty advisors: Eric W. Kaler, College of Engineering; and Abraham M. Lenhoff, Dept. of Chemical Engineering. Includes bibliographical references.

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26

Silcox, D. "Studies on the uptake, translocation and metabolism of three nonionic ethoxylate surfactants following foliar application." Thesis, University of Bristol, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381408.

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27

Carale, Maria Teresa Reyes. "Salt effects on micellization, micellar growth, and phase behavior of aqueous solutions of nonionic surfactants." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/82744.

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28

Matsson, Maria. "Adsorption of polyhydroxyl based surfactants." Doctoral thesis, KTH, Chemistry, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-421.

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<p>Adsorption on solid surfaces from solution is a fundamental property of a surfactant. It might even be the most important aspect of surfactant behavior, since it influences many applications, such as cleaning, detergency, dispersion, separation, flotation, and lubrication. Consequently, fundamental investigations of surfactant adsorption are relevant to many areas.</p><p>The main aim of this thesis has been to elucidate the adsorption properties, primarily on the solid/water interface, of a particular class of polyhydroxyl based surfactants: the alkyl glucosides. By the use of ellipsometry,

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29

Norton, Dean Stephen. "Capillary Electrochromatography-Mass Spectrometry (CEC-MS) of Surfactants." Digital Archive @ GSU, 2007. http://digitalarchive.gsu.edu/chemistry_diss/13.

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This research presents advancements in the coupling of capillary electrochromatography (CEC) to mass spectrometry (MS) for the analysis of different chemical classes of surfactants. Chapter 1 provides a brief introduction that summarizes the mechanics and fundamentals of CEC, including instrumentation and applications for CEC-MS. Chapter 2 describes the on-line hyphenation of a packed CEC column with an internally tapered tip coupled to electrospray ionization-mass spectrometry (ESI-MS) and atmospheric pressure chemical ionization-mass spectrometry (APCI-MS) for the analysis of betaine-type am

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30

Bruce, Ian Edward. "A study of cashew nut shell liquid purification and the synthesis of nonionic surfactants from the component phenols." Thesis, Brunel University, 1991. http://bura.brunel.ac.uk/handle/2438/6274.

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The major phenolic lipids from natural and technical Cashew Nut-Shell Liquids were isolated by various techniques including precipitation, chemical purification, distillation, phase separation and chromatography. Cardanol, 3-pentadecyl phenol and cardol were polyethoxylated under base catalysed conditions and the products were characterised by both nmr and HPLC. Their surfactant properties were then analysed by surface tension measurements and their rates and extent of biodegradation were evaluated by means of a modified OECD screening test. The synthesis of the biosyntetic intermediate 2,4-di

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31

Tinkham, Rebecca. "Soil removal and redeposition on cotton, nylon, and polyester fabrics wet-cleaned with anionic and nonionic surfactants." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ60507.pdf.

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32

Giardi, Chloé. "Synthèse de surfactifs à base de polyoxazoline : propriétés physicochimiques et formulation." Thesis, Montpellier, Ecole nationale supérieure de chimie, 2011. http://www.theses.fr/2011ENCM0008/document.

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Nous décrivons dans ce manuscrit la synthèse et l'étude de surfactifs à base de poly(2-méthyl-2-oxazoline) et de corps gras. Pour cela, deux voies de synthèse ont été réalisées. La première qui consiste à amorcer la polymérisation avec un alcool gras tosylé. La deuxième voie de synthèse a été réalisée en amorçant la polymérisation par un alcane iodé. Les surfactifs ainsi obtenus ont une chaîne grasse saturée ayant douze ou dix-huit atomes de carbone et des longueurs de chaînes polymères variables.Ces surfactifs sont examinés afin d'évaluer leur aptitude à la formulation. Ainsi, la valeur de le

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33

Lopes, Francisco Nascimento. "Aplicação das relações lineares de energia livre de solvatação (LSER) ao estudo de sistemas interfaciais organizados." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/46/46136/tde-15052012-095022/.

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Neste estudo foi caracterizado o processo de solubilização de solutos neutros em sistemas micelares compostos de surfactantes não iônicos da família de alcoóis secundários etoxilados com o mesmo grupo hidrofóbico e graus diferentes de etoxilação, variando de 5 a 30 subunidades de oxido de etileno. Para isso, foram utilizadas as Relações Lineares de Energias Livres de Solvatação (LSER) como modelo preditivo para a eficiência de incorporação de solutos. As análises de regressão múltipla e as validações apresentadas tiveram por base a constante de incorporação micelar KS como variável dependente

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34

Amphaisri, Kanchanavadee. "The determination of alkylphenol polyethoxylate nonionic surfactants and their related compounds in environmental and commercial samples by chromatography." Thesis, University of Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324325.

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35

Ladhe, Abhay R. "SURFACTANT AND METAL SORPTION STUDIES BY FUNCTIONALIZED MEMBRANES AND QUARTZ CRYSTAL MICROBALANCE." UKnowledge, 2008. http://uknowledge.uky.edu/gradschool_diss/671.

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Functionalized membranes provide an elegant platform for selective separations and sorptions. In this dissertation, application of functionalized membranes for surfactant and metal sorption studies are discussed. Sorption behavior of surfactants is also studied using quartz crystal microbalance (QCM) and other techniques. Adsorption of the ethoxylated surfactants on polymeric materials (cotton and polyester) and model gold surface was quantified from a non-aqueous siloxane based solvent (D5) and water. The role of ethylene oxide group and the effect of nature of polymeric materials on adsorpti

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36

Banchathanakij, Rawiwan. "Rheophysical properties of fluorinated nonionic micellar phases : link with mesoporous materials." Thesis, Université de Lorraine, 2012. http://www.theses.fr/2012LORR0283/document.

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Afin d'établir un lien entre les solutions servant de modèles dans la préparation de matériaux mésoporeux, on étudie les propriétés physiques à l'équilibre et hors équilibre de solutions micellaires aqueuses à base de deux tensioactifs fluorés : C8F17C2H4(OC2H4)9OH, [RF8(EO)9] and C7F15C2H4(OC2H4)8OH, [RF7(EO)8]. Cette étude devrait nous aider à comprendre pourquoi on obtient des matériaux mésoporeux bien ordonnés à partir de solutions micellaires du tensioactif RF8(EO)9 et des structures désordonnées lorsque l'on utilise RF7(EO)8. Les expériences sont menées sur quatre systèmes de deux surfac

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37

Schneiderman, Eva. "CYCLODEXTRIN VERSATILITY." University of Cincinnati / OhioLINK, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ucin999022301.

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38

HASEGAWA, Takuya, Tomonari UMEMURA, Akira KOIDE, et al. "Evaluation of an ODS Column Modified with Zwitterionic/Nonionic Mixed Surfactants and Its Application to Direct Injection Determination of Inorganic Anions." 日本分析化学会, 2005. http://hdl.handle.net/2237/8754.

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39

Mann, Reinier Matthew. "Toxicological Impact of Agricultural Surfactants on Australian Frogs." Thesis, Curtin University, 2000. http://hdl.handle.net/20.500.11937/522.

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Surfactants are one of the more ubiquitous contaminants in aquatic systems. Their importance as toxic components of pesticide formulations has, however, been largely overlooked. Amphibians particularly, as inhabitants of shallow, temporary and often lentic aquatic environments may be at risk from exposure to these chemicals when they enter aquatic systems. This thesis presents data on the toxicity of surfactants to amphibians. Several experimental exposures were conducted with embryo-larval, tadpole and adult developmental stages of the Australian species- Crinia insignifera, Helcioporus eyrei

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40

Mann, Reinier Matthew. "Toxicological Impact of Agricultural Surfactants on Australian Frogs." Curtin University of Technology, School of Environmental Biology, 2000. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=14006.

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Surfactants are one of the more ubiquitous contaminants in aquatic systems. Their importance as toxic components of pesticide formulations has, however, been largely overlooked. Amphibians particularly, as inhabitants of shallow, temporary and often lentic aquatic environments may be at risk from exposure to these chemicals when they enter aquatic systems. This thesis presents data on the toxicity of surfactants to amphibians. Several experimental exposures were conducted with embryo-larval, tadpole and adult developmental stages of the Australian species- Crinia insignifera, Helcioporus eyrei

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41

Du, Na. "Investigation of Hydrogenated and Fluorinated Surfactant Based-Systems for the Design of Porous Silica Materials." Thesis, Nancy 1, 2010. http://www.theses.fr/2010NAN10046/document.

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Ce travail est consacré à l’étude des propriétés de systèmes à base de tensioactifs non ioniques hydrogéné et fluoré dans le but de préparer des matériaux poreux silicatés. L’effet de la solubilisation d’hexadécane ou de décane dans des micelles de C12H25CO(OC2H4)9OCH3 conduit à la formation de silices mésoporeuses à plus larges pores, tandis qu’aucun effet de gonflement n’est observé avec l’ajout de cyclohexane. Lorsque les matériaux sont préparés avec des micelles de C8F17C2H4(OC2H4)9OH, l’ajout de perflorooctylbromure (PFOBr) augmente la taille des mésopores. Par ailleurs, l’incorporation d

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42

Zerkoune, Leïla. "Développement de nanovecteurs multicompartimentaux à base de cyclodextrines amphiphiles et de lipides pour des applications en nanomédecine." Thesis, Paris 11, 2015. http://www.theses.fr/2015PA114837.

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L’idée directrice de ce travail de thèse était d’introduire au sein de mésophases lipidiques des molécules de β-cyclodextrine (βCD) amphiphiles obtenue par bio-estérification afin d’obtenir des nano-assemblages plurimoléculaires et multi-compartimentés combinant trois fonctions essentielles pour le transport ou la vectorisation de molécules thérapeutiques : (i) la capacité d’incorporer une substance d’intérêt par formation de complexe d’inclusion avec la cyclodextrine ; (ii) être biocompatibles et aptes à passer facilement les barrières biologiques ; (iii) pouvoir co-incorporer une seconde sub

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43

Richmond, Howard N. "Phase inversion in nonionic surfactant-oil-water systems." Thesis, Loughborough University, 1992. https://dspace.lboro.ac.uk/2134/14713.

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This study has been concerned with the inversion of water in oil (W/0) emulsions, to oil in water (O/W) emulsions and vice-versa. It has been shown that there are two types of emulsion phase inversion that can occur in nonionic Surfactant-Oil-Water (nSOW) systems: (i) A "transitional" inversion, which is brought about by changing the nSOW phase behaviour, by altering the surfactant's affinity for the oil and water phases and, (ii) a "catastrophic" inversion, induced by increasing the dispersed phase fraction and occurs at closest packing of unstable dispersed phase drops. The inversion mechani

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44

Furlong, P. J. J. "Salt effects in nonionic surfactant/dodecane/water systems." Thesis, University of Nottingham, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235449.

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45

Haynes, Matthew David. "Foaming and anti-foaming of nonionic surfactant solutions." Thesis, University of Hull, 2004. http://hydra.hull.ac.uk/resources/hull:13817.

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Foam is important for many processes such as enhanced oil recovery and firefighting. Although a large volume of foam is desirable for these particular applications, for other applications it needs to be suppressed, for example, in washing machines. In order to suppress foam formation, an anti-foam agent is added to the foaming solution. An anti-foam agent may take the form of oil, solid particles (generally of the micron (Jlm) size range), or a combination of both. This thesis is concerned with understanding the foaming and anti-foaming of nonionic surfactants of the polyoxyethylene glycol eth

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46

Qiao, Lijun. "A Study of Triton X Series Nonionic Surfactant Solutions." Thesis, University of Auckland, 1996. http://hdl.handle.net/2292/2349.

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This work contains some fundamental investigations on Triton X series nonionic surfactants from different aspects. Techniques, such as viscometry, densimetry, diffusion measurement, ultra-violet spectrophotometry, differential scanning calorimetry, surface tension measurement and optical microscopy were employed to acquire the information. Some theoretical analyses were given to the results of these measurements. Triton X surfactants show different properties when they dissolve in different solvents. Aggregation can occur in some solvents, depending on the interactions between solvent and solu

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47

Venugopal, E. "Organization of colloids and polymers with nonionic surfactant assemblies." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2015. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2056.

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48

Yang, Xiaomei Sibley Jeffrey Lynn. "Effects of a nonionic surfactant on plant growth and physiology." Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SUMMER/Horticulture/Dissertation/Yang_Xiaomei_2.pdf.

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49

Wakerly, M. G. "Self-emulsifying drug delivery systems based on nonionic surfactant-oil mixtures." Thesis, University of Bath, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235402.

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50

SEO, YOUNGWOO. "Application of Nonionic Surfactant for the Bioremediation of Polycyclic Aromatic Hydrocarbons." University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1203447147.

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