{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/122018"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/122018","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Structural property relation in improving chemically and physically crosslinked hydrogel surface properties","abstract":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms","abstract_html":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms","abstract_has_math":false,"creators":["Chowdhury, Nusrat"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Mechanical Engineering","degree_department":null,"school":null,"contributors":["Dunn, Alison C"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2023,"date_issued":"2023-12","date_published":"2023-12","updated_at":"2026-07-22T22:25:00Z","subjects":["Hydrogel","Permeability","Solid Volume Fraction","Surface Properties","Friction","Physical-chemical Crosslinking"],"languages":["en","eng"],"rights":["Copyright 2023 Nusrat Chowdhury"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/122018","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Dunn, Alison C"]},{"key":"dc:creator","label":"Author","values":["Chowdhury, Nusrat"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2023-12","2023-12-07"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Mechanical Engineering"]},{"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":["Hydrogel","Permeability","Solid Volume Fraction","Surface Properties","Friction","Physical-chemical Crosslinking"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en","eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2023 Nusrat Chowdhury"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/122018"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms","The student, Nusrat Chowdhury, accepted the attached license on 2023-11-27 at 11:29.","The student, Nusrat Chowdhury, submitted this Thesis for approval on 2023-11-27 at 11:33.","This Thesis was approved for publication on 2023-12-07 at 15:05.","DSpace SAF Submission Ingestion Package generated from Vireo submission #20017 on 2024-03-01 at 13:15:03","Hydrogels are materials composed of solid and fluid components in their structure. The transport properties of hydrogels largely depend on their concentration, as solutes can pass through the polymer mesh and can be determined by the polymer density. A flow pressure-controlled permeameter was developed to determine the permeability of hydrogels at various polymer concentrations ranging from 4% to 17% for physically crosslinked and chemically crosslinked hydrogels. The permeability was determined by measuring the flow rate of aqueous solutions as a function of pressure drop across the membranes using a biphasic model to evaluate intrinsic permeability. The permeability derived from Darcy’s law showed a negative power law relation as the volume fraction of solid increases in a hydrogel. The process can determine the permeability of various hydrogels with varying charge and polymer concentrations and cross-linking. Our work aimed to validate the classical Darcy’s law equation for hydrogel composition structure and whether the equations established apply to varying pressure phenomena. The results indicate that Darcy’s law evaluates the hydrogel permeability for physical and chemical crosslinking. Additionally, this work focuses on the mechanical, tribological, and structural property variation due to the polymerization technique of hydrogels and how it varies based on the chemical and physical crosslinking of polyacrylamide and PVA hydrogel. The swelling ratio, elastic modulus, permeability, and friction coefficient of the physically and chemically crosslinked hydrogels were compared, and their chemical structure was analyzed to understand the connection between the structural and tribological relation of the hydrogels."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Structural property relation in improving chemically and physically crosslinked hydrogel surface properties"]}]}],"canonical_facts":{"dc:contributor":["Dunn, Alison C"],"dc:creator":["Chowdhury, Nusrat"],"dc:date":["2023-12","2023-12-07"],"dc:description":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms","The student, Nusrat Chowdhury, accepted the attached license on 2023-11-27 at 11:29.","The student, Nusrat Chowdhury, submitted this Thesis for approval on 2023-11-27 at 11:33.","This Thesis was approved for publication on 2023-12-07 at 15:05.","DSpace SAF Submission Ingestion Package generated from Vireo submission #20017 on 2024-03-01 at 13:15:03","Hydrogels are materials composed of solid and fluid components in their structure. The transport properties of hydrogels largely depend on their concentration, as solutes can pass through the polymer mesh and can be determined by the polymer density. A flow pressure-controlled permeameter was developed to determine the permeability of hydrogels at various polymer concentrations ranging from 4% to 17% for physically crosslinked and chemically crosslinked hydrogels. The permeability was determined by measuring the flow rate of aqueous solutions as a function of pressure drop across the membranes using a biphasic model to evaluate intrinsic permeability. The permeability derived from Darcy’s law showed a negative power law relation as the volume fraction of solid increases in a hydrogel. The process can determine the permeability of various hydrogels with varying charge and polymer concentrations and cross-linking. Our work aimed to validate the classical Darcy’s law equation for hydrogel composition structure and whether the equations established apply to varying pressure phenomena. The results indicate that Darcy’s law evaluates the hydrogel permeability for physical and chemical crosslinking. Additionally, this work focuses on the mechanical, tribological, and structural property variation due to the polymerization technique of hydrogels and how it varies based on the chemical and physical crosslinking of polyacrylamide and PVA hydrogel. The swelling ratio, elastic modulus, permeability, and friction coefficient of the physically and chemically crosslinked hydrogels were compared, and their chemical structure was analyzed to understand the connection between the structural and tribological relation of the hydrogels."],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/122018"],"dc:language":["en","eng"],"dc:rights":["Copyright 2023 Nusrat Chowdhury"],"dc:subject":["Hydrogel","Permeability","Solid Volume Fraction","Surface Properties","Friction","Physical-chemical Crosslinking"],"dc:title":["Structural property relation in improving chemically and physically crosslinked hydrogel surface properties"],"dc:type":["text"],"thesis:degree_discipline":["Mechanical Engineering"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:00Z"}