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Diffusiophoretic Colloidal Transport in Complex Fluids
Diffusiophoretic Colloidal Transport in Complex Fluids
Diffusiophoretic Colloidal Transport in Complex Fluids

Detailed Information

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
키워드  
Chemical formulations
키워드  
Chemical manufacturing
키워드  
Colloidal systems
키워드  
Critical micelle concentration
기타저자  
Carnegie Mellon University Chemical Engineering
기본자료저록  
Dissertations Abstracts International. 86-02B.
전자적 위치 및 접속  
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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.

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