{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/88122"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/88122","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Chemistry at liquid-liquid interfaces: con- and counter-current extraction and biologically active membranes in microchannels","abstract":"Surface modification of microchannels with a photo-reactive self-assembled monolayer (SAM) allows for the stable photo-patterning of liquid-air interfaces within the microchannel. It is also found that these hydrophobic/hydrophilic interfaces allow for stable interfaces between immiscible fluids. Chemistry can be conducted at these interfaces. Reversed-micelle extraction of metal ions is studied. Traditionally, fluid flow of immiscible liquids is not stable and requires controlled microchannel geometries and flow rates. The stability of the liquid-liquid interface allows for exploration in varying flow profiles within the microchannel that could not be previously studied. In particular, the flow profile in which one phase is left stationary, con- and counter-current flow. It is found that reversed-micelle extraction does not behave like typical diffusion based extraction. What is observed is an unusual perturbation at the liquid-liquid interface during the extraction that leads to turbulent flow in the microchannel. This turbulent flow differs based on the type of fluid flow in the microchannel. The ability to create stable liquid-liquid interfaces allows for the formation of membranes within the microchannel via interfacial polymerization. The stability of liquid-liquid interfaces allows for membrane formation via interfacial polymerization. Polyamide membranes are created incorporating amino acid residues. The selection of the amino acid sequence allows for the ability to create biologically active membranes that can potentially be used as biological sensors. Biologically active membranes that are reactive to chymotrypsin are synthesized and studied. It is found that these polyamide membranes can be synthesized within the microchannel and have shown reactivity toward chymotrypsin. The result of the reaction with chymotrypsin leads to a breakdown in the membranes porosity that can be visualized as a change in spontaneous fluid flow or it can lead to total dissolution of the membrane itself.","abstract_html":"Surface modification of microchannels with a photo-reactive self-assembled monolayer (SAM) allows for the stable photo-patterning of liquid-air interfaces within the microchannel. It is also found that these hydrophobic/hydrophilic interfaces allow for stable interfaces between immiscible fluids. Chemistry can be conducted at these interfaces. Reversed-micelle extraction of metal ions is studied. Traditionally, fluid flow of immiscible liquids is not stable and requires controlled microchannel geometries and flow rates. The stability of the liquid-liquid interface allows for exploration in varying flow profiles within the microchannel that could not be previously studied. In particular, the flow profile in which one phase is left stationary, con- and counter-current flow. It is found that reversed-micelle extraction does not behave like typical diffusion based extraction. What is observed is an unusual perturbation at the liquid-liquid interface during the extraction that leads to turbulent flow in the microchannel. This turbulent flow differs based on the type of fluid flow in the microchannel. The ability to create stable liquid-liquid interfaces allows for the formation of membranes within the microchannel via interfacial polymerization. The stability of liquid-liquid interfaces allows for membrane formation via interfacial polymerization. Polyamide membranes are created incorporating amino acid residues. The selection of the amino acid sequence allows for the ability to create biologically active membranes that can potentially be used as biological sensors. Biologically active membranes that are reactive to chymotrypsin are synthesized and studied. It is found that these polyamide membranes can be synthesized within the microchannel and have shown reactivity toward chymotrypsin. The result of the reaction with chymotrypsin leads to a breakdown in the membranes porosity that can be visualized as a change in spontaneous fluid flow or it can lead to total dissolution of the membrane itself.","abstract_has_math":false,"creators":["Viernes, Neil Oliver"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Chemistry","degree_department":null,"school":null,"contributors":["Moore, Jeffrey S."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-29T20:38:55Z","date_published":"2015-09-29T20:38:55Z","updated_at":"2026-07-22T22:26:31Z","subjects":["Microfluidics","Membrane"],"languages":["en"],"rights":["Copyright 2015 Neil O.L. Viernes"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/88122","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Moore, Jeffrey S."]},{"key":"dc:creator","label":"Author","values":["Viernes, Neil Oliver"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-29T20:38:55Z","2015-08","2015-07-23","2015-8"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemistry"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Microfluidics","Membrane"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2015 Neil O.L. Viernes"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/88122"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Surface modification of microchannels with a photo-reactive self-assembled monolayer (SAM) allows for the stable photo-patterning of liquid-air interfaces within the microchannel. It is also found that these hydrophobic/hydrophilic interfaces allow for stable interfaces between immiscible fluids. Chemistry can be conducted at these interfaces. Reversed-micelle extraction of metal ions is studied. Traditionally, fluid flow of immiscible liquids is not stable and requires controlled microchannel geometries and flow rates. The stability of the liquid-liquid interface allows for exploration in varying flow profiles within the microchannel that could not be previously studied. In particular, the flow profile in which one phase is left stationary, con- and counter-current flow. It is found that reversed-micelle extraction does not behave like typical diffusion based extraction. What is observed is an unusual perturbation at the liquid-liquid interface during the extraction that leads to turbulent flow in the microchannel. This turbulent flow differs based on the type of fluid flow in the microchannel. The ability to create stable liquid-liquid interfaces allows for the formation of membranes within the microchannel via interfacial polymerization. The stability of liquid-liquid interfaces allows for membrane formation via interfacial polymerization. Polyamide membranes are created incorporating amino acid residues. The selection of the amino acid sequence allows for the ability to create biologically active membranes that can potentially be used as biological sensors. Biologically active membranes that are reactive to chymotrypsin are synthesized and studied. It is found that these polyamide membranes can be synthesized within the microchannel and have shown reactivity toward chymotrypsin. The result of the reaction with chymotrypsin leads to a breakdown in the membranes porosity that can be visualized as a change in spontaneous fluid flow or it can lead to total dissolution of the membrane itself.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2015-09-29 without embargo terms","The student, Neil Viernes, accepted the attached license on 2015-07-23 at 13:26.","The student, Neil Viernes, submitted this Thesis for approval on 2015-07-23 at 13:35.","This Thesis was approved for publication on 2015-07-23 at 16:27.","DSpace SAF Submission Ingestion Package generated from Vireo submission #8632 on 2015-09-29 at 13:23:41","Made available in DSpace on 2015-09-29T20:38:55Z (GMT). No. of bitstreams: 2 VIERNES-THESIS-2015.pdf: 3315279 bytes, checksum: 70360fca07a5321e3f57a0d873506c7c (MD5) LICENSE.txt: 4209 bytes, checksum: 56a37f15006b23eb298f475681ae853f (MD5) Previous issue date: 2015-07-23"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Chemistry at liquid-liquid interfaces: con- and counter-current extraction and biologically active membranes in microchannels"]}]}],"canonical_facts":{"dc:contributor":["Moore, Jeffrey S."],"dc:creator":["Viernes, Neil Oliver"],"dc:date":["2015-09-29T20:38:55Z","2015-08","2015-07-23","2015-8"],"dc:description":["Surface modification of microchannels with a photo-reactive self-assembled monolayer (SAM) allows for the stable photo-patterning of liquid-air interfaces within the microchannel. It is also found that these hydrophobic/hydrophilic interfaces allow for stable interfaces between immiscible fluids. Chemistry can be conducted at these interfaces. Reversed-micelle extraction of metal ions is studied. Traditionally, fluid flow of immiscible liquids is not stable and requires controlled microchannel geometries and flow rates. The stability of the liquid-liquid interface allows for exploration in varying flow profiles within the microchannel that could not be previously studied. In particular, the flow profile in which one phase is left stationary, con- and counter-current flow. It is found that reversed-micelle extraction does not behave like typical diffusion based extraction. What is observed is an unusual perturbation at the liquid-liquid interface during the extraction that leads to turbulent flow in the microchannel. This turbulent flow differs based on the type of fluid flow in the microchannel. The ability to create stable liquid-liquid interfaces allows for the formation of membranes within the microchannel via interfacial polymerization. The stability of liquid-liquid interfaces allows for membrane formation via interfacial polymerization. Polyamide membranes are created incorporating amino acid residues. The selection of the amino acid sequence allows for the ability to create biologically active membranes that can potentially be used as biological sensors. Biologically active membranes that are reactive to chymotrypsin are synthesized and studied. It is found that these polyamide membranes can be synthesized within the microchannel and have shown reactivity toward chymotrypsin. The result of the reaction with chymotrypsin leads to a breakdown in the membranes porosity that can be visualized as a change in spontaneous fluid flow or it can lead to total dissolution of the membrane itself.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2015-09-29 without embargo terms","The student, Neil Viernes, accepted the attached license on 2015-07-23 at 13:26.","The student, Neil Viernes, submitted this Thesis for approval on 2015-07-23 at 13:35.","This Thesis was approved for publication on 2015-07-23 at 16:27.","DSpace SAF Submission Ingestion Package generated from Vireo submission #8632 on 2015-09-29 at 13:23:41","Made available in DSpace on 2015-09-29T20:38:55Z (GMT). No. of bitstreams: 2 VIERNES-THESIS-2015.pdf: 3315279 bytes, checksum: 70360fca07a5321e3f57a0d873506c7c (MD5) LICENSE.txt: 4209 bytes, checksum: 56a37f15006b23eb298f475681ae853f (MD5) Previous issue date: 2015-07-23"],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/2142/88122"],"dc:language":["en"],"dc:rights":["Copyright 2015 Neil O.L. Viernes"],"dc:subject":["Microfluidics","Membrane"],"dc:title":["Chemistry at liquid-liquid interfaces: con- and counter-current extraction and biologically active membranes in microchannels"],"dc:type":["text"],"thesis:degree_discipline":["Chemistry"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:31Z"}