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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 Poly(Benzimidazole) Gas Separation Membranes
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260311091526.5
- ISBN
- 9798270230852
- DDC
- 620.11
- 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
- 기타저자
- The University of Texas at Austin Chemical Engineering
- 기본자료저록
- Dissertations Abstracts International. 87-06B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■020 ▼a9798270230852
■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.


