{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/90842"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/90842","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Fabrication and mechanical characterization of liquid-in-solid elastomeric soft composites","abstract":"As one of the emerging new composite materials, liquid-in-solid elastomer soft composites are of the current research interest for their enhanced mechanical properties and high biological application potentials. Despite established microscopic models for describing elastic behaviors of the two-phase material incorporating liquid-solid interfacial energy, how multiple liquid inclusions would affect the macroscopic mechanical properties of composites are not yet fully understood. In this thesis research, by selecting polydimethylsiloxane (PDMS) as the matrix material and glycerol as the liquid material, liquid-in-solid composites with polydisperse and monodisperse inclusion sizes are fabricated by using the simple mixing method and the coaxial microfluidic device (CMD), respectively. The stiffness and toughness of composites are characterized by using adapted basic testing methods. The effects of the volume fraction, size, size polydispersity, and interactions of liquid inclusions on the elastic modulus, general toughness, and fracture energy of composites are evaluated and quantified by relating experimental measurements with theoretical predictions. From the results, macroscopic softening of stiff-matrix composites (E ≥ ~150 kPa) with an increasing inclusion volume fraction, macroscopic stiffening of polydisperse composites with a decreasing average inclusion size, and macroscopic toughening of composites with dilute liquid inclusions (3- 15% volume fraction ) are observed. Furthermore, counter-predictive stiffening in monodisperse composites is found; the effect of inclusion interactions is investigated as an additional stiffening contributor other than liquid surface tension. In general, this thesis research provides theoretical and experimental bases for designing composite-like bio-materials, along with insights into the mechanics of composites.","abstract_html":"As one of the emerging new composite materials, liquid-in-solid elastomer soft composites are of the current research interest for their enhanced mechanical properties and high biological application potentials. Despite established microscopic models for describing elastic behaviors of the two-phase material incorporating liquid-solid interfacial energy, how multiple liquid inclusions would affect the macroscopic mechanical properties of composites are not yet fully understood. In this thesis research, by selecting polydimethylsiloxane (PDMS) as the matrix material and glycerol as the liquid material, liquid-in-solid composites with polydisperse and monodisperse inclusion sizes are fabricated by using the simple mixing method and the coaxial microfluidic device (CMD), respectively. The stiffness and toughness of composites are characterized by using adapted basic testing methods. The effects of the volume fraction, size, size polydispersity, and interactions of liquid inclusions on the elastic modulus, general toughness, and fracture energy of composites are evaluated and quantified by relating experimental measurements with theoretical predictions. From the results, macroscopic softening of stiff-matrix composites (E ≥ ~150 kPa) with an increasing inclusion volume fraction, macroscopic stiffening of polydisperse composites with a decreasing average inclusion size, and macroscopic toughening of composites with dilute liquid inclusions (3- 15% volume fraction ) are observed. Furthermore, counter-predictive stiffening in monodisperse composites is found; the effect of inclusion interactions is investigated as an additional stiffening contributor other than liquid surface tension. In general, this thesis research provides theoretical and experimental bases for designing composite-like bio-materials, along with insights into the mechanics of composites.","abstract_has_math":false,"creators":["Zhang, Bingyang"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Mechanical Engineering","degree_department":null,"school":null,"contributors":["Hutchens, Shelby B."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2016,"date_issued":"2016-07-07T20:35:23Z","date_published":"2016-07-07T20:35:23Z","updated_at":"2026-07-22T22:26:34Z","subjects":["liquid-in-solid composite","fabrication","mechanical characterization","stiffening","toughening"],"languages":["en"],"rights":["Copyright 2016 Bingyang Zhang"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/90842","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Hutchens, Shelby B."]},{"key":"dc:creator","label":"Author","values":["Zhang, Bingyang"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2016-07-07T20:35:23Z","2018-07-08T09:15:36Z","2016-04-28","2016-05"]},{"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":["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":["liquid-in-solid composite","fabrication","mechanical characterization","stiffening","toughening"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2016 Bingyang Zhang"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/90842"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["As one of the emerging new composite materials, liquid-in-solid elastomer soft composites are of the current research interest for their enhanced mechanical properties and high biological application potentials. Despite established microscopic models for describing elastic behaviors of the two-phase material incorporating liquid-solid interfacial energy, how multiple liquid inclusions would affect the macroscopic mechanical properties of composites are not yet fully understood. In this thesis research, by selecting polydimethylsiloxane (PDMS) as the matrix material and glycerol as the liquid material, liquid-in-solid composites with polydisperse and monodisperse inclusion sizes are fabricated by using the simple mixing method and the coaxial microfluidic device (CMD), respectively. The stiffness and toughness of composites are characterized by using adapted basic testing methods. The effects of the volume fraction, size, size polydispersity, and interactions of liquid inclusions on the elastic modulus, general toughness, and fracture energy of composites are evaluated and quantified by relating experimental measurements with theoretical predictions. From the results, macroscopic softening of stiff-matrix composites (E ≥ ~150 kPa) with an increasing inclusion volume fraction, macroscopic stiffening of polydisperse composites with a decreasing average inclusion size, and macroscopic toughening of composites with dilute liquid inclusions (3- 15% volume fraction ) are observed. Furthermore, counter-predictive stiffening in monodisperse composites is found; the effect of inclusion interactions is investigated as an additional stiffening contributor other than liquid surface tension. In general, this thesis research provides theoretical and experimental bases for designing composite-like bio-materials, along with insights into the mechanics of composites.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2018-05-01","The student, Bingyang Zhang, accepted the attached license on 2016-04-27 at 12:45.","The student, Bingyang Zhang, submitted this Thesis for approval on 2016-04-27 at 13:45.","This Thesis was approved for publication on 2016-04-28 at 09:05.","DSpace SAF Submission Ingestion Package generated from Vireo submission #9547 on 2016-07-07 at 13:51:03","Made available in DSpace on 2016-07-07T20:35:23Z (GMT). No. of bitstreams: 2 ZHANG-THESIS-2016.pdf: 2861964 bytes, checksum: 9165c75bedac662dcc37e0860636117b (MD5) LICENSE.txt: 4211 bytes, checksum: a9c0f5ad1a5d788e38c81244cdf65fe2 (MD5) Previous issue date: 2016-04-28","Embargo set by: Seth Robbins for item 93195 Lift date: 2018-07-07T20:35:34Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system","U of I Only Restriction Lifted for Item 93195 on 2018-07-08T09:15:36Z."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Fabrication and mechanical characterization of liquid-in-solid elastomeric soft composites"]}]}],"canonical_facts":{"dc:contributor":["Hutchens, Shelby B."],"dc:creator":["Zhang, Bingyang"],"dc:date":["2016-07-07T20:35:23Z","2018-07-08T09:15:36Z","2016-04-28","2016-05"],"dc:description":["As one of the emerging new composite materials, liquid-in-solid elastomer soft composites are of the current research interest for their enhanced mechanical properties and high biological application potentials. Despite established microscopic models for describing elastic behaviors of the two-phase material incorporating liquid-solid interfacial energy, how multiple liquid inclusions would affect the macroscopic mechanical properties of composites are not yet fully understood. In this thesis research, by selecting polydimethylsiloxane (PDMS) as the matrix material and glycerol as the liquid material, liquid-in-solid composites with polydisperse and monodisperse inclusion sizes are fabricated by using the simple mixing method and the coaxial microfluidic device (CMD), respectively. The stiffness and toughness of composites are characterized by using adapted basic testing methods. The effects of the volume fraction, size, size polydispersity, and interactions of liquid inclusions on the elastic modulus, general toughness, and fracture energy of composites are evaluated and quantified by relating experimental measurements with theoretical predictions. From the results, macroscopic softening of stiff-matrix composites (E ≥ ~150 kPa) with an increasing inclusion volume fraction, macroscopic stiffening of polydisperse composites with a decreasing average inclusion size, and macroscopic toughening of composites with dilute liquid inclusions (3- 15% volume fraction ) are observed. Furthermore, counter-predictive stiffening in monodisperse composites is found; the effect of inclusion interactions is investigated as an additional stiffening contributor other than liquid surface tension. In general, this thesis research provides theoretical and experimental bases for designing composite-like bio-materials, along with insights into the mechanics of composites.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2018-05-01","The student, Bingyang Zhang, accepted the attached license on 2016-04-27 at 12:45.","The student, Bingyang Zhang, submitted this Thesis for approval on 2016-04-27 at 13:45.","This Thesis was approved for publication on 2016-04-28 at 09:05.","DSpace SAF Submission Ingestion Package generated from Vireo submission #9547 on 2016-07-07 at 13:51:03","Made available in DSpace on 2016-07-07T20:35:23Z (GMT). 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