{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/101200"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/101200","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Rheology and design of yield-stress fluids","abstract":"Yield-stress fluids are materials that transition from solid-like to fluid-like at a critical applied stress and are currently the most utilized rheological phenomenon. Yield-stress fluids have found use in drug delivery, food products, batteries, surface coatings, 3D printing materials, and many other applications. This rheological phenomenon can be achieved by a diverse range of microstructures including polymeric gels, colloidal glasses, and more. Rationally designing such rheologically complex materials requires the determination of the relationships between processing, structure, properties (rheology), and ultimately performance. This research is composed of distinct but interconnected experimental studies of these design relationships for yield-stress fluids. This work presents a paradigm for the design of rheologically-complex materials focused on the rheology-to-structure inverse problem for model yield-stress fluids which forms the basis for the subsequent studies that focus on a particular secondary property (extensibility), particular applications (direct-write 3D printing and performance magic), and appropriate processing to obtain a yield-stress fluid material. I generate a design space for material selection and design of extensible yield-stress fluids and introduce model materials with this important behavior. One model material is the subject of a case study on direct-write 3D printing; an emulsion with high extensibility is used to establish key property targets for direct-writable materials. Another study discusses the role of a yield stress and high extensibility in a resin used in performance magic, “Mystic Smoke”. The final study focuses on the connection between processing and rheology for a particular material, aqueous methylcellulose, and investigates the effects of dynamic conditions on the linear and nonlinear mechanical properties of gelling materials or yield-stress fluids.","abstract_html":"Yield-stress fluids are materials that transition from solid-like to fluid-like at a critical applied stress and are currently the most utilized rheological phenomenon. Yield-stress fluids have found use in drug delivery, food products, batteries, surface coatings, 3D printing materials, and many other applications. This rheological phenomenon can be achieved by a diverse range of microstructures including polymeric gels, colloidal glasses, and more. Rationally designing such rheologically complex materials requires the determination of the relationships between processing, structure, properties (rheology), and ultimately performance. This research is composed of distinct but interconnected experimental studies of these design relationships for yield-stress fluids. This work presents a paradigm for the design of rheologically-complex materials focused on the rheology-to-structure inverse problem for model yield-stress fluids which forms the basis for the subsequent studies that focus on a particular secondary property (extensibility), particular applications (direct-write 3D printing and performance magic), and appropriate processing to obtain a yield-stress fluid material. I generate a design space for material selection and design of extensible yield-stress fluids and introduce model materials with this important behavior. One model material is the subject of a case study on direct-write 3D printing; an emulsion with high extensibility is used to establish key property targets for direct-writable materials. Another study discusses the role of a yield stress and high extensibility in a resin used in performance magic, “Mystic Smoke”. The final study focuses on the connection between processing and rheology for a particular material, aqueous methylcellulose, and investigates the effects of dynamic conditions on the linear and nonlinear mechanical properties of gelling materials or yield-stress fluids.","abstract_has_math":false,"creators":["Nelson, Arif Z."],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Mechanical Engineering","degree_department":null,"school":null,"contributors":["Ewoldt, Randy H.","Schroeder, Charles M.","Nuzzo, Ralph G.","Sottos, Nancy R."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2018,"date_issued":"2018-09-04T20:36:49Z","date_published":"2018-09-04T20:36:49Z","updated_at":"2026-07-22T22:24:38Z","subjects":["Rheology","Design","3D Printing","Yield-stress fluid","Extensibility","Magic","Gelation","Emulsion"],"languages":["en"],"rights":["Copyright 2018 Arif Nelson"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/101200","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Ewoldt, Randy H.","Schroeder, Charles M.","Nuzzo, Ralph G.","Sottos, Nancy R."]},{"key":"dc:creator","label":"Author","values":["Nelson, Arif Z."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2018-09-04T20:36:49Z","2020-09-05T09:15:16Z","2018-04-20","2018-05"]},{"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":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"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":["Rheology","Design","3D Printing","Yield-stress fluid","Extensibility","Magic","Gelation","Emulsion"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2018 Arif Nelson"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/101200"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Yield-stress fluids are materials that transition from solid-like to fluid-like at a critical applied stress and are currently the most utilized rheological phenomenon. Yield-stress fluids have found use in drug delivery, food products, batteries, surface coatings, 3D printing materials, and many other applications. This rheological phenomenon can be achieved by a diverse range of microstructures including polymeric gels, colloidal glasses, and more. Rationally designing such rheologically complex materials requires the determination of the relationships between processing, structure, properties (rheology), and ultimately performance. This research is composed of distinct but interconnected experimental studies of these design relationships for yield-stress fluids. This work presents a paradigm for the design of rheologically-complex materials focused on the rheology-to-structure inverse problem for model yield-stress fluids which forms the basis for the subsequent studies that focus on a particular secondary property (extensibility), particular applications (direct-write 3D printing and performance magic), and appropriate processing to obtain a yield-stress fluid material. I generate a design space for material selection and design of extensible yield-stress fluids and introduce model materials with this important behavior. One model material is the subject of a case study on direct-write 3D printing; an emulsion with high extensibility is used to establish key property targets for direct-writable materials. Another study discusses the role of a yield stress and high extensibility in a resin used in performance magic, “Mystic Smoke”. The final study focuses on the connection between processing and rheology for a particular material, aqueous methylcellulose, and investigates the effects of dynamic conditions on the linear and nonlinear mechanical properties of gelling materials or yield-stress fluids.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2020-05-01","The student, Arif Nelson, accepted the attached license on 2018-04-19 at 17:30.","The student, Arif Nelson, submitted this Dissertation for approval on 2018-04-19 at 17:41.","This Dissertation was approved for publication on 2018-04-20 at 14:10.","DSpace SAF Submission Ingestion Package generated from Vireo submission #12391 on 2018-08-31 at 17:21:04","Made available in DSpace on 2018-09-04T20:36:49Z (GMT). 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Yield-stress fluids have found use in drug delivery, food products, batteries, surface coatings, 3D printing materials, and many other applications. This rheological phenomenon can be achieved by a diverse range of microstructures including polymeric gels, colloidal glasses, and more. Rationally designing such rheologically complex materials requires the determination of the relationships between processing, structure, properties (rheology), and ultimately performance. This research is composed of distinct but interconnected experimental studies of these design relationships for yield-stress fluids. This work presents a paradigm for the design of rheologically-complex materials focused on the rheology-to-structure inverse problem for model yield-stress fluids which forms the basis for the subsequent studies that focus on a particular secondary property (extensibility), particular applications (direct-write 3D printing and performance magic), and appropriate processing to obtain a yield-stress fluid material. I generate a design space for material selection and design of extensible yield-stress fluids and introduce model materials with this important behavior. One model material is the subject of a case study on direct-write 3D printing; an emulsion with high extensibility is used to establish key property targets for direct-writable materials. Another study discusses the role of a yield stress and high extensibility in a resin used in performance magic, “Mystic Smoke”. The final study focuses on the connection between processing and rheology for a particular material, aqueous methylcellulose, and investigates the effects of dynamic conditions on the linear and nonlinear mechanical properties of gelling materials or yield-stress fluids.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2020-05-01","The student, Arif Nelson, accepted the attached license on 2018-04-19 at 17:30.","The student, Arif Nelson, submitted this Dissertation for approval on 2018-04-19 at 17:41.","This Dissertation was approved for publication on 2018-04-20 at 14:10.","DSpace SAF Submission Ingestion Package generated from Vireo submission #12391 on 2018-08-31 at 17:21:04","Made available in DSpace on 2018-09-04T20:36:49Z (GMT). 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