{"id":{"repo_id":"buffalo","oai_identifier":"oai:ubir.buffalo.edu:10477/86745"},"canonical_url":"https://search.dev.ndltd.org/etd/buffalo/oai:ubir.buffalo.edu:10477/86745","repository":{"repo_id":"buffalo","name":"Buffalo","base_url":"https://ubir.buffalo.edu/oai/request"},"display":{"title":"Aqueous Self-Assembly Properties of Novel Surfactants","abstract":"Ph.D.","abstract_html":"Ph.D.","abstract_has_math":false,"creators":["Jahan, Ruksana"],"institution":"State University of New York at Buffalo","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Alexandridis, Paschalis","Chemical and Biological Engineering"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2025,"date_issued":"2025-02-21T21:44:39Z","date_published":"2025-02-21T21:44:39Z","updated_at":"2026-07-27T19:05:34Z","subjects":["chemical engineering"],"languages":["eng"],"rights":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10477/86745","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Alexandridis, Paschalis","Chemical and Biological Engineering"]},{"key":"dc:creator","label":"Author","values":["Jahan, Ruksana"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2025-02-21T21:44:39Z","2020"]},{"key":"dc:publisher","label":"Institution","values":["State University of New York at Buffalo"]},{"key":"dc:type","label":"Dc Type","values":["Text","Dissertation"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["chemical engineering"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/10477/86745"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Ph.D.","Surfactants are amphiphilic molecules exhibiting interesting behavior in aqueous solution and have diverse practical applications such as detergents, paints, industrial, environmental, and pharmaceutics. In this dissertation, we studied on the physicochemical properties of biosurfactants of microbial origin. We investigated block copolymer (pluronic) adsorption on silica nanoparticles in presence different types of salts. We address the effect of chain length and salts on the micelle formation and structure for novel fluorinated surfactants in water. We also investigated ionic liquid effects on fluorinated surfactant micellization and on fluorinated surfactant-polymer association in order to modulate fluorinated surfactant as a safer surfactant. Biosurfactants are structurally diverse, amphiphilic molecules synthesized by plants, animals, and microbes. Biosurfactants are environmentally safe and biodegradable, making them attractive candidates for applications spanning cosmetics to oil recovery. Biosurfactants spontaneously adsorb at various interfaces and self-assemble in aqueous solution, resulting in useful physicochemical properties such as decreased surface and interfacial tension, low critical micellization concentrations (CMCs), and ability to solubilize hydrophobic compounds. Block copolymers, which comprise chemically-different polymer blocks in the same chain, are of wide-spread interest to industrial and academic research. Block copolymers often exhibit amphiphilic behavior as the solvent affinity of each block is typically different. This allows them to adsorb in complex configurations at solid/liquid interfaces, as well as to decrease the surface tension at oil/water interfaces in a manner analogous to low molecular-weight surfactants. We studied how mono- and divalent salts influence the adsorption of PEO-PPO-PEO block copolymers onto silica particles dispersed in water. The micellization of ionic surfactants in aqueous media results from a balance between the attraction of hydrophobic chains and the electrostatic repulsion of surfactant head-groups. In perfluorinated surfactants, the fluorine atoms replace hydrogen atoms in the alkyl chain. The unique physicochemical properties of perfluorinated surfactants include very low surface tensions, low CMCs, high fluidities, low dielectric constants, high vapor pressures, high compressibilities, and high gas solubilities. These make them useful for several applications including textiles, plastics manufacturing, surface cleaning, paper packaging, leveling agents for paints, mist suppression, lubricants, firefighting foams, oil recovery, biomedical imaging, and oxygen carriers. We investigated the effect of chain length and salts on the micelle formation and structure for sodium perfluorooctanoate (NaPFO) and sodium perfluorohexanoate (NaPFHx) in water. We also investigated ionic liquid effects on ammonium perfluorooctanoate (APFO) micellization and on fluorinated surfactant-polymer association in water.","**To request an accessible version of the file(s) associated with this item, contact library@buffalo.edu. Please include the item's persistent URL [http://hdl.handle.net/. . .] in your request.**"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Aqueous Self-Assembly Properties of Novel Surfactants"]}]}],"canonical_facts":{"dc:contributor":["Alexandridis, Paschalis","Chemical and Biological Engineering"],"dc:creator":["Jahan, Ruksana"],"dc:date":["2025-02-21T21:44:39Z","2020"],"dc:description":["Ph.D.","Surfactants are amphiphilic molecules exhibiting interesting behavior in aqueous solution and have diverse practical applications such as detergents, paints, industrial, environmental, and pharmaceutics. In this dissertation, we studied on the physicochemical properties of biosurfactants of microbial origin. We investigated block copolymer (pluronic) adsorption on silica nanoparticles in presence different types of salts. We address the effect of chain length and salts on the micelle formation and structure for novel fluorinated surfactants in water. We also investigated ionic liquid effects on fluorinated surfactant micellization and on fluorinated surfactant-polymer association in order to modulate fluorinated surfactant as a safer surfactant. Biosurfactants are structurally diverse, amphiphilic molecules synthesized by plants, animals, and microbes. Biosurfactants are environmentally safe and biodegradable, making them attractive candidates for applications spanning cosmetics to oil recovery. Biosurfactants spontaneously adsorb at various interfaces and self-assemble in aqueous solution, resulting in useful physicochemical properties such as decreased surface and interfacial tension, low critical micellization concentrations (CMCs), and ability to solubilize hydrophobic compounds. Block copolymers, which comprise chemically-different polymer blocks in the same chain, are of wide-spread interest to industrial and academic research. Block copolymers often exhibit amphiphilic behavior as the solvent affinity of each block is typically different. This allows them to adsorb in complex configurations at solid/liquid interfaces, as well as to decrease the surface tension at oil/water interfaces in a manner analogous to low molecular-weight surfactants. We studied how mono- and divalent salts influence the adsorption of PEO-PPO-PEO block copolymers onto silica particles dispersed in water. The micellization of ionic surfactants in aqueous media results from a balance between the attraction of hydrophobic chains and the electrostatic repulsion of surfactant head-groups. In perfluorinated surfactants, the fluorine atoms replace hydrogen atoms in the alkyl chain. The unique physicochemical properties of perfluorinated surfactants include very low surface tensions, low CMCs, high fluidities, low dielectric constants, high vapor pressures, high compressibilities, and high gas solubilities. These make them useful for several applications including textiles, plastics manufacturing, surface cleaning, paper packaging, leveling agents for paints, mist suppression, lubricants, firefighting foams, oil recovery, biomedical imaging, and oxygen carriers. We investigated the effect of chain length and salts on the micelle formation and structure for sodium perfluorooctanoate (NaPFO) and sodium perfluorohexanoate (NaPFHx) in water. We also investigated ionic liquid effects on ammonium perfluorooctanoate (APFO) micellization and on fluorinated surfactant-polymer association in water.","**To request an accessible version of the file(s) associated with this item, contact library@buffalo.edu. Please include the item's persistent URL [http://hdl.handle.net/. . .] in your request.**"],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/10477/86745"],"dc:language":["eng"],"dc:publisher":["State University of New York at Buffalo"],"dc:rights":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."],"dc:subject":["chemical engineering"],"dc:title":["Aqueous Self-Assembly Properties of Novel Surfactants"],"dc:type":["Text","Dissertation"]},"updated_at":"2026-07-27T19:05:34Z"}