Self-Healing in the Presence of Monovalent and Divalent Ions

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dc.contributor.advisorGetachew, Bezawit Aen_US
dc.creatorParulski-Seager, Durnian Chen Chang Lien_US
dc.date.accessioned2024-01-24T22:46:45Zen_US
dc.date.available2024-01-24T22:46:45Zen_US
dc.date.created2023-12en_US
dc.date.issued2023-11-16en_US
dc.date.submittedDecember 2023en_US
dc.date.updated2024-01-24T22:46:45Zen_US
dc.description.abstractSelf-healing materials are those that can recover from physical or chemical damage autonomously. To be applied in underwater applications such as water treatment, self-healing materials need to demonstrate sufficient healing ability in complex water matrices. Herein, we investigated how monovalent (NaCl) and divalent (MgSO4) ions at concentrations relevant to brackish and seawater salinity impact the self-healing efficiency of a model 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) and N,N′-methylenebis(acrylamide) (MBA) hydrogel. It has been assumed that divalent ions would form ionic bonds and act as crosslinkers between viable functional groups (negatively charged oxygens, etc.). However, our results suggest that this assumption needs to be reconsidered. Under concentrations relevant to seawater (35 g/L), magnesium ions hindered self-healing efficiency by ∼30% as measured by recovery of ultimate tensile (UT) strength. On the other hand, they improved self-healing efficiency by ∼100% as measured by recovery of UT strain. A similar trend was also observed for sodium ions. The chemical crosslinker ratio when doubled did not impact self-healing efficiency. These results challenge the assumption that divalent ions always form ionic bonds that enhance healing and that chemical crosslinking alters the self-healing performance.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationParulski-Seager, Durnian Chen Chang Li. "Self-Healing in the Presence of Monovalent and Divalent Ions." (2023). Master's thesis, Rice University. https://hdl.handle.net/1911/115414en_US
dc.identifier.urihttps://hdl.handle.net/1911/115414en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectsmart materialen_US
dc.subjectpolymeren_US
dc.subjectself-healingen_US
dc.subjecthydrogen bondingen_US
dc.subjectionsen_US
dc.titleSelf-Healing in the Presence of Monovalent and Divalent Ionsen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentCivil and Environmental Engineeringen_US
thesis.degree.disciplineEngineeringen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Scienceen_US
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