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Influence of Processing Procedure, Plasticization, and High Temperature Physical Aging on Poly(Benzimidazole) Gas Separation Membranes
Influence of Processing Procedure, Plasticization, and High Temperature Physical Aging on ...
Influence of Processing Procedure, Plasticization, and High Temperature Physical Aging on Poly(Benzimidazole) Gas Separation Membranes

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자료유형  
 학위논문 서양
최종처리일시  
20260311091526.5
ISBN  
9798270230852
DDC  
620.11
저자명  
Richardson, Julian Marré
서명/저자  
Influence of Processing Procedure, Plasticization, and High Temperature Physical Aging on Poly(Benzimidazole) Gas Separation Membranes / Julian Marré Richardson
발행사항  
[Sl] : The University of Texas at Austin, 2025
형태사항  
1 electronic resource (205 pages)
주기사항  
Source: Dissertations Abstracts International, Volume: 87-06, Section: B.
주기사항  
Advisors: Freeman, Benny D. Committee members: Smith, Zachary P.; Page, Zachariah A.; Lynd, Nathaniel A.
학위논문주기  
- Ph.D. : The University of Texas at Austin, 2025.
초록/해제  
요약Polybenzimidazoles (PBIs) are a class of polymer of particular interest in gas separations due to their high glass transition temperature, high thermal and chemical stability, advantageous mechanical properties, and beneficial gas separation properties at elevated temperatures. The rigid structure of PBI makes the impressive properties possible. Much effort has been focused on synthesizing variants of PBI and characterizing their gas transport properties. Unfortunately, the rigid structure of PBI also creates a significant drawback, limited solubility. Most PBI structures that have potentially useful gas separation characteristics are insoluble and cannot be processed into membranes. Recently, a new membrane manufacturing process named the poly phosphoric acid process with densification was founded. This method of membrane manufacturing removes the need for synthesized PBIs to be soluble in organic solvents. As a result, several new chemistries of high molecular weight PBIs were produced. This study investigates the gas separation properties of PBIs made from the polyphosphoric acid process with densification to develop an understanding of the utility of the polyphosphoric acid process with densification for membrane manufacturing and the structure-property relationship of resulting PBI variants. Additionally, gas permeation and sorption experiments were conducted at elevated temperatures and relevant pressures for pre-combustion carbon capture. One PBI variant produced, p-PBI, is a structural isomer of the commercially available m-PBI. p-PBI was found to have a greater H2/CO2 and a lower H2 permeability than m-PBI. This finding is a departure from the common structure-property relationship between meta/para isomers of linear aromatic polymers where meta-linked isomers have a higher H2/CO2 selectivity and lower H2 permeability than their para-connected counterparts. The nature of the differences between materials was explored by characterizing p/m-PBI copolymers. Physical aging and plasticization studies provide insights into the viability of PBIs as pre-combustion carbon capture membranes.
언어주기  
English
일반주제명  
Chemistry
일반주제명  
Physical chemistry
키워드  
Polyphosphoric acid process
키워드  
Polybenzimidazoles
키워드  
Structure-property relationship
기타저자  
The University of Texas at Austin Chemical Engineering
기본자료저록  
Dissertations Abstracts International. 87-06B.
전자적 위치 및 접속  
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■040    ▼aMiAaPQD▼beng▼cMiAaPQD▼erda
■082    ▼a620.11
■1001  ▼aRichardson,  Julian  Marré▼eauthor.
■24510▼aInfluence  of  Processing  Procedure,  Plasticization,  and  High  Temperature  Physical  Aging  on  Poly(Benzimidazole)  Gas  Separation  Membranes  ▼cJulian  Marré  Richardson
■260    ▼a[Sl]▼bThe  University  of  Texas  at  Austin▼c2025
■264  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a1  electronic  resource  (205  pages)
■336    ▼atext▼btxt▼2rdacontent
■337    ▼acomputer▼bc▼2rdamedia
■338    ▼aonline  resource▼bcr▼2rdacarrier
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-06,  Section:  B.
■500    ▼aAdvisors:  Freeman,  Benny  D.    Committee  members:  Smith,  Zachary  P.;  Page,  Zachariah  A.;  Lynd,  Nathaniel  A.
■5021  ▼bPh.D.▼cThe  University  of  Texas  at  Austin▼d2025.
■520    ▼aPolybenzimidazoles  (PBIs)  are  a  class  of  polymer  of  particular  interest  in  gas  separations  due  to  their  high  glass  transition  temperature,  high  thermal  and  chemical  stability,  advantageous  mechanical  properties,  and  beneficial  gas  separation  properties  at  elevated  temperatures.  The  rigid  structure  of  PBI  makes  the  impressive  properties  possible.  Much  effort  has  been  focused  on  synthesizing  variants  of  PBI  and  characterizing  their  gas  transport  properties.  Unfortunately,  the  rigid  structure  of  PBI  also  creates  a  significant  drawback,  limited  solubility.  Most  PBI  structures  that  have  potentially  useful  gas  separation  characteristics  are  insoluble  and  cannot  be  processed  into  membranes.  Recently,  a  new  membrane  manufacturing  process  named  the  poly  phosphoric  acid  process  with  densification  was  founded.  This  method  of  membrane  manufacturing  removes  the  need  for  synthesized  PBIs  to  be  soluble  in  organic  solvents.  As  a  result,  several  new  chemistries  of  high  molecular  weight  PBIs  were  produced.                          This  study  investigates  the  gas  separation  properties  of  PBIs  made  from  the  polyphosphoric  acid  process  with  densification  to  develop  an  understanding  of  the  utility  of  the  polyphosphoric  acid  process  with  densification  for  membrane  manufacturing  and  the  structure-property  relationship  of  resulting  PBI  variants.  Additionally,  gas  permeation  and  sorption  experiments  were  conducted  at  elevated  temperatures  and  relevant  pressures  for  pre-combustion  carbon  capture.  One  PBI  variant  produced,  p-PBI,  is  a  structural  isomer  of  the  commercially  available  m-PBI.  p-PBI  was  found  to  have  a  greater  H2/CO2  and  a  lower  H2  permeability  than  m-PBI.  This  finding  is  a  departure  from  the  common  structure-property  relationship  between  meta/para  isomers  of  linear  aromatic  polymers  where  meta-linked  isomers  have  a  higher  H2/CO2  selectivity  and  lower  H2  permeability  than  their  para-connected  counterparts.  The  nature  of  the  differences  between  materials  was  explored  by  characterizing  p/m-PBI  copolymers.  Physical  aging  and  plasticization  studies  provide  insights  into  the  viability  of  PBIs  as  pre-combustion  carbon  capture  membranes.
■546    ▼aEnglish
■590    ▼aSchool  code:  0227
■650  4▼aChemistry
■650  4▼aPhysical  chemistry
■653    ▼aPolyphosphoric  acid  process
■653    ▼aPolybenzimidazoles
■653    ▼aStructure-property  relationship
■7102  ▼aThe  University  of  Texas  at  Austin▼bChemical  Engineering.▼edegree  granting  institution.
■7201  ▼aFreeman,  Benny  D.▼edegree  supervisor.
■7730  ▼tDissertations  Abstracts  International▼g87-06B.
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17361175▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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