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Diffusiophoretic Colloidal Transport in Complex Fluids
Diffusiophoretic Colloidal Transport in Complex Fluids
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152809
- ISBN
- 9798383729595
- DDC
- 660
- 저자명
- Yang, Angela.
- 서명/저자
- Diffusiophoretic Colloidal Transport in Complex Fluids
- 발행사항
- [Sl] : Carnegie Mellon University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 117 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-02, Section: B.
- 주기사항
- Advisor: Tilton, Robert D.;Garoff, Stephen.
- 학위논문주기
- Thesis (Ph.D.)--Carnegie Mellon University, 2024.
- 초록/해제
- 요약Complex fluids and colloidal systems are ubiquitous in chemical formulations and manufacturing. Often, transport of colloidal actives is important for the proper function and manufacturing of consumer goods such as detergents, pharmaceutical drugs, and personal care products. Diffusiophoresis is a colloidal transport mechanism that is driven only by a solute gradient. This transport mechanism is advantageous in such applications where a solute gradient may naturally arise or where external driving fields can be costly or intrusive. Currently, diffusiophoresis is only well understood for simple material systems, hindering its application to more industrially relevant formulations. Such formulations include surfactants and complexing polymers, among others. A microfluidic platform was used to measure the diffusiophoretic transport of negatively charged colloids in ionic surfactant gradients above and below the critical micelle concentration (CMC). A numerical model of transport in the microfluidic cell incorporating existing theory was used to compare to experimental results. It was shown that above the CMC, micelles contribute to diffusiophoretic transport, leading to transport rates of comparable or greater magnitude to that below the CMC and in the same direction.Using similar experimental techniques, the diffusiophoretic transport of negatively charged colloids in ionic surfactant gradients (sodium dodecylsulfate) in the presence of a complexing polymer (Pluronic P123 triblock copolymer) was measured. Numerical modelling and experimental analysis showed that colloidal transport in industrially relevant surfactant solute gradients in the presence of a complexing polymer was significantly enhanced compared to that in simple electrolyte gradients because the slow diffusing complexes prolonged a large solute gradient to drive transport.
- 일반주제명
- Chemical engineering
- 일반주제명
- Materials science
- 일반주제명
- Polymer chemistry
- 기타저자
- Carnegie Mellon University Chemical Engineering
- 기본자료저록
- Dissertations Abstracts International. 86-02B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■020 ▼a9798383729595
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■040 ▼aMiAaPQ▼cMiAaPQ
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■1001 ▼aYang, Angela.▼0(orcid)0000-0002-7277-9274
■24510▼aDiffusiophoretic Colloidal Transport in Complex Fluids
■260 ▼a[Sl]▼bCarnegie Mellon University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a117 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-02, Section: B.
■500 ▼aAdvisor: Tilton, Robert D.;Garoff, Stephen.
■5021 ▼aThesis (Ph.D.)--Carnegie Mellon University, 2024.
■520 ▼aComplex fluids and colloidal systems are ubiquitous in chemical formulations and manufacturing. Often, transport of colloidal actives is important for the proper function and manufacturing of consumer goods such as detergents, pharmaceutical drugs, and personal care products. Diffusiophoresis is a colloidal transport mechanism that is driven only by a solute gradient. This transport mechanism is advantageous in such applications where a solute gradient may naturally arise or where external driving fields can be costly or intrusive. Currently, diffusiophoresis is only well understood for simple material systems, hindering its application to more industrially relevant formulations. Such formulations include surfactants and complexing polymers, among others. A microfluidic platform was used to measure the diffusiophoretic transport of negatively charged colloids in ionic surfactant gradients above and below the critical micelle concentration (CMC). A numerical model of transport in the microfluidic cell incorporating existing theory was used to compare to experimental results. It was shown that above the CMC, micelles contribute to diffusiophoretic transport, leading to transport rates of comparable or greater magnitude to that below the CMC and in the same direction.Using similar experimental techniques, the diffusiophoretic transport of negatively charged colloids in ionic surfactant gradients (sodium dodecylsulfate) in the presence of a complexing polymer (Pluronic P123 triblock copolymer) was measured. Numerical modelling and experimental analysis showed that colloidal transport in industrially relevant surfactant solute gradients in the presence of a complexing polymer was significantly enhanced compared to that in simple electrolyte gradients because the slow diffusing complexes prolonged a large solute gradient to drive transport.
■590 ▼aSchool code: 0041.
■650 4▼aChemical engineering
■650 4▼aMaterials science
■650 4▼aPolymer chemistry
■653 ▼aChemical formulations
■653 ▼aChemical manufacturing
■653 ▼aColloidal systems
■653 ▼aCritical micelle concentration
■690 ▼a0542
■690 ▼a0794
■690 ▼a0495
■71020▼aCarnegie Mellon University▼bChemical Engineering.
■7730 ▼tDissertations Abstracts International▼g86-02B.
■790 ▼a0041
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163921▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
