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Master's Dissertation
DOI
10.11606/D.75.2010.tde-26072010-093355
Document
Author
Full name
Fernando de Lucca Barbarini
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2010
Supervisor
Committee
Rodrigues Filho, Ubirajara Pereira (President)
Nascente, Pedro Augusto de Paula
Tremiliosi Filho, Germano
Title in Portuguese
Membranas de peneira molecular de carbono obtidas pela pirólise de poli(imidas) ramificadas
Keywords in Portuguese
Melamina
Membrana assimétrica
Pirólise
Poli(imida) ramificada
Abstract in Portuguese
Nesse trabalho obtiveram-se membranas de poli(imida) ramifricada com tamanho de poro ajustável usando melamina como agente de ramificação e indutor da formação de poros. Estas poli(imidas) foram sulfonadas usando-se ácido sulfúrico concentrado eficazmente. Finalmente, obtivemos membranas de carbono molecular por pirólise sob atmosfera inerte das poli(imidas) ramificadas. Estas membranas apresentam canais micrométricos paralelos à superfície e uma estrutura assimétrica constituída de uma camada densa filtrante e uma camada com canais micrométricos paralelos à superfície altamente ordenados. A membrana apresentou boa estabilidade química frente ao ataque por radicais hidroxila gerados via reação de Fenton.
Title in English
Carbon molecular sieves obtained from branched poly(imide) pyrolysis
Keywords in English
Asymetric membranes
Branched poly(imide)
Melamine
Pyrolysis
Abstract in English
In this work was obtained branched poly(imides) with tuned pore size using melamine as branching and pore induction agent. The poly(imides) with were efficiently sulfonated with concentrated sulfuric acid. Finally, the molecular sieve carbon membranes were obtained by pyrolysis under inert atmosphere of the branched poly(imides). These membranes have an asymmetric structure with a dense filtering layer and a porous layer with highly ordered channels standing parallel to the surface. These membranes display good chemical stability toward hydroxyl radical attack produced by Fenton reaction.
 
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Publishing Date
2010-12-01
 
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