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Dissertations / Theses on the topic 'PBI membrane'

Author: Grafiati

Published: 4 June 2021

Last updated: 10 February 2022

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1

Kreisz, Aurélien. "Membranes PBI pour pile à combustible haute température." Thesis, Montpellier, 2016. http://www.theses.fr/2016MONTT224.

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Cette thèse débute par une courte introduction traitant des principes et de l'état de l'art des PEMFC dans le but de situer le contexte des travaux. Le but des travaux présentés dans ce manuscrit est de développer une nouvelle méthode de préparation de membrane pour les piles à combustible haute température (> 120 °C). Le polybenzimidazole dopé à l'acide phosphorique est devenu la référence des PEM haute température. Un degré de dopage élevé est essentiel pour minimiser les pertes ohmiques dans la cellule. Malheureusement un degré de dopage élevé entraine aussi une plastification de la memb

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2

Suarez, Matthew. "The Effect of Membrane Thickness on the Performance of PBI-Based High-Temperature Direct Methanol Fuel Cells." Digital WPI, 2013. https://digitalcommons.wpi.edu/etd-theses/1131.

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"This project investigates the effect of membrane thickness on the performance and durability of a Direct Methanol Fuel Cell (DMFC) using a commercially available Celtec®P-1000 PBI-based membrane electrode assembly (MEA). The PBI-based membranes tested were the 100µm, the standard thickness, 200µm and 250µm thick. With various methanol feed concentrations and cathode feeds, oxygen and air, the PBI-based MEAs were operated between 160 and 180°C with vaporized methanol feed. Results showed that the DMFC performance increased with temperature and with PBI membrane thickness. The optimal concent

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3

Gomes, Carlos André Mendonça. "Study of multi-component systems in polybenzimidazole membrane formation and their impact on membrane performance." Master's thesis, Faculdade de Ciências e Tecnologia, 2013. http://hdl.handle.net/10362/10651.

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Dissertação para obtenção do Grau de Mestre em Engenharia Química e Bioquímica<br>Integrally skinned asymmetric polybenzimidazole (PBI) membranes suitable for organic solvent nanofiltration (OSN) were prepared via phase inversion and several changes were implemented in the dope solutions in order to control their molecular weight cut-off (MWCO). Initially, uncrosslinked membranes with different polymer concentrations were tested to investigate their impact on membrane performance. On a second approach, several co-solvents were added in the dope solutions of PBI membranes. Coupling this meth

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4

Barrientos, Wilner Valenzuela. "Estudo dos parâmetros operacionais de uma célula a combustível de glicerol direto utilizando uma membrana de polibencimidazol impregnada com ácido fosfórico (PBI/H3PO4) ou 1-hexil-3-metilimidazol trifluorometanosulfo." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/75/75134/tde-15092015-135733/.

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Com o aumento da população mundial, o desenvolvimento de novas fontes e conversores de energia tornou-se uma necessidade. As células a combustível mostram-se como uma alternativa viável devido principalmente a duas razões, sua alta eficiência e a utilização de combustíveis renováveis. No presente trabalho se estuda a influência da temperatura de operação e o conteúdo de álcali no combustível sobre a densidade de potencia para uma célula a combustível de glicerol direto. Como combustível foi utilizado uma solução de glicerol:KOH (1M:xM, x=0, 1, 3, 5), como membranas foram utilizados filmes de p

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5

Lee, Jeong Kyu. "Direct Methanol Fuel Cell Membranes from Polymer Blends." Case Western Reserve University School of Graduate Studies / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=case1134316195.

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6

Basdemir, Merve. "Development Of Pbi Based Membranes For H2/co2 Separation." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615473/index.pdf.

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Recent developments have confirmed that in the future hydrogen demand in industrial applications will arise because of the growing requirements for H2 in chemical manufacturing, petroleum refining, and the newly emerging clean energy concepts. Hydrogen is mainly produced from the steam reforming of natural gas and water gas shift reactions. The major products of these processes are hydrogen and carbon dioxide. The selective removal of CO2 from the product gas is important because it poisons catalysts in the reactor and it is highly corrosive. Membrane separation processes for hydrogen purific

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7

Schoeman, Johannes Gerhardus. "H2SO4 stability of PBI–blend membranes for SO2 electrolysis Schoeman / H." Thesis, North-West University, 2011. http://hdl.handle.net/10394/7567.

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Alternative energy sources are needed if the current use of energy is to be sustained while reducing global warming. A possible alternative energy source that has significant potential is hydrogen. For hydrogen to become a serious contender for replacing fossil fuels, the production thereof has to be further investigated. One such process, the membrane–based Hybrid Sulphur (HyS) process, where hydrogen is produced from the electrolysis of SO2, has received considerable interest recently. Since H2SO4 is formed during SO2 electrolysis, H2SO4 stability is a prerequisite for any membrane to be use

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Freitas, Mauricio Azevedo de. "Poli(indeno) fosfonado : síntese, propriedades e uso como eletrólito em membranas a base de PBI." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/181807.

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Neste trabalho, um polímero eletrólito derivado do poli(indeno) (PInd) foi desenvolvido como componente de membranas poliméricas a base de polibenzimidazol (PBI) para célula a combustível de média temperatura. Foi investigado o método de síntese, envolvendo a reação de fosfonação pelo método de Friedel-Crafts assistido por catalisador ácido de Lewis AlCl3. O polímero poli(indeno) fosfonado (PPInd) foi comparado com seu análogo sulfonado, o poli(indeno) sulfonado (SPInd), e usados nas blendas com 5, 7,5 e 10% em peso com o PBI. Os polímeros precursores foram caracterizados por espectroscopia de

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9

Petek, Tyler Joseph. "An Investigation of PBI/PA Membranes for Application in Pump Cells for the Purification and Pressurization of Hydrogen." Case Western Reserve University School of Graduate Studies / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=case1320704555.

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10

Fattori, Enrico. "Membrane elettrofilate ibride a base di PBS e cheratina per il rilascio controllato di farmaci." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18569/.

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Grazie agli sviluppi delle nanotecnologie biomedicali nell’ambito del rilascio controllato di farmaci, sta diventando sempre più concreta la possibilità di superare i principali limiti della medicina tradizionale, basata su somministrazioni frequenti e ripetute di quantità di principio attivo anche superiori rispetto a quelle necessarie, e che dopo poco tempo raggiungono livelli al di sotto della soglia di efficacia. Tramite lo studio dei biomateriali e delle loro proprietà è possibile realizzare soluzioni ad hoc per il rilascio mirato di farmaco nel sito in cui è richiesta la terapia, con cin

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Sforzini, Matteo. "Membrane elettrofilate biodegradabili a base di PBS e cheratina per il rilascio di farmaci ed ingegneria tissutale." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/19192/.

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Grazie agli sviluppi delle nanotecnologie biomedicali nell’ambito del rilascio controllato di farmaci e dell’ingegneria tissutale, sta diventando sempre più concreta la possibilità di superare i principali limiti della medicina tradizionale, basata nel primo caso su somministrazioni ripetute e a livello sistemico di principio attivo, e nel secondo caso sul trapianto (con relativi problemi di rigetto e carenza di donatori) e su trattamenti farmacologici non risolutivi. Tramite lo studio dei biomateriali e delle loro proprietà è invece possibile realizzare soluzioni ad hoc per l’ingegneria tissu

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12

Pierini, Giulia. "Preparation and characterization of grafted nonwoven membranes for bioseparations." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11903/.

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Protein purification plays a crucial role in biotechnology and biomanufacturing, where downstream unit operations account for 40%-80% of the overall costs. To overcome this issue, companies strive to simplify the separation process by reducing the number of steps and replacing expensive separation devices. In this context, commercially available polybutylene terephthalate (PBT) melt-blown nonwoven membranes have been developed as a novel disposable membrane chromatography support. The PBT nonwoven membrane is able to capture products and reduce contaminants by ion exchange chromatography. The

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Bondi, Edoardo. "Membrane elettrofilate di cheratina e poli(butilene succinato): effetti della composizione della miscela sulle proprietà chimico-fisiche delle membrane e sulla cinetica di rilascio di farmaci." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23187/.

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In ambito biomedicale una delle applicazioni che ad oggi sta riscuotendo un interesse crescente è lo studio di dispositivi performanti per il rilascio controllato di farmaci. La realizzazione di materiali nanofibrosi a base di polimeri di origine naturale e sintetica costituisce una strada molto interessate. In particolare, la cheratina, che può essere ricavata da un’ampia quantità di sottoprodotti delle industrie zootecniche e tessili, presenta ottima biocompatibilità e caratteristiche che le consentono di svolgere il ruolo di carrier per molteplici tipologie di sostanze. La fragilità e la di

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14

Hailesilassie, Biruk Wobeshet. "Mechanisms of Blister Formation on Concrete Bridge Decks with Waterprooving Asphalt Pavement Systems." Licentiate thesis, KTH, Väg- och banteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-124078.

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Bridge decks are commonly subjected to harsh environmental conditions that often lead to serious corrosion problems triggered by blisters under the hot mix asphalt bridge deck surfacing and secretly evolving during weather exposure until damage is often detected too late. Blisters may form under both the waterproofing dense mastic asphalt layer or under the waterproofing membrane which is often applied as additional water protection under the mastic asphalt (MA). One of the main technical issues is the formation of blisters under the membrane and asphalt-covered concrete structures caused by a

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15

Socrier, Larissa. "Influence de la localisation d’antioxydants sur la peroxydation des lipides membranaires : étude du mode d’action de dérivés PBN et de composés phénoliques." Thesis, Compiègne, 2017. http://www.theses.fr/2017COMP2382/document.

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Les espèces réactives de l’oxygène (EROs) sont essentielles à la survie des cellules car elles interviennent dans divers processus physiologiques comme la défense immunitaire ou encore la régulation de voies de signalisation cellulaires. Cependant, un excès d’EROs peut créer un déséquilibre de la balance EROs/antioxydants appelé « stress oxydant ». Le stress oxydant étant impliqué dans l’étiologie de plus de 200 pathologies, l’action des antioxydants est cruciale pour limiter les effets délétères des EROs. Les antioxydants utilisés par les cellules peuvent être de nature chimique. Parmi ceux-c

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Salvagnini, Claudio. "Thrombin inhibitors grafting on polyester membranes for the preparation of blood-compatible materials." Université catholique de Louvain, 2005. http://edoc.bib.ucl.ac.be:81/ETD-db/collection/available/BelnUcetd-11232005-103604/.

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The design of biomaterials, historically initiated and developed by physicians and engineers, in the last decades has slowly shifted toward a more biochemical based approach. For the replacement, repair and regeneration of tissues scientists are now focusing on materials that stimulate specific biological response at the molecular level. These biomaterials have already shown interesting applications in cell proliferation, differentiation, and extracellular matrix production and organization when the material modifications are designed to elicit specific interactions with cell integrins. In the

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17

Hertig, Alexandre. "Rôle de l'inhibiteur de type 1 des activateurs du plasminogène dans la régulation de la fibrinolyse glomérulaire : application au modèle de glomérulonéphrite par anticorps anti-membrane basale glomérulaire." Paris 6, 2004. http://www.theses.fr/2004PA066590.

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18

Silva, Mojica Ernesto. "Polymer-silica Hybrids for Separation of CO2 and Catalysis of Organic Reactions." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1398439043.

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19

AinurRosidah, Afira, and 羅海誼. "Functionalized Carbon Nanofiber/PBI Nanocomposite Membranes for High Temperature Proton Exchange Membrane Fuel Cells." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/6x47ry.

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20

Wang, Chun-Ju, and 王俊茹. "The separation of PBI based on molecular weight&The effect of molecular weight upon PBI membrane properties." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/91944167594103797582.

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碩士<br>元智大學<br>化學工程與材料科學學系<br>98<br>The effect of molecular weight upon polybenzimidazole (PBI) membrane properties has been investigated. PBI was synthesized by polymerization of 3,3-diaminobenzidine and isophthalic acid with a molar ratio of 1:1. The structure of PBI was determined by FTIR. The obtained polymer was then fractionated by dissolving in various solvent at temperatures 30◦C The weight-averaged molecular weights of 1.24×104, 8.85×104, 2.91×105, and 3.81×105 g /mol were obtained. PBI membranes have been prepared with different molecular weights. The acid uptake and mechanical streng

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Yi-KuangChen and 陳宜寬. "Effects of Reformate on PBI/H3PO4 Proton Exchange Membrane Fuel Cells." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/13745068525017325226.

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碩士<br>國立成功大學<br>航空太空工程學系碩博士班<br>100<br>The reformate gas produced from a reformer has to be purified in order to reduce the carbon monoxide concentration to a range which is tolerable for a proton exchange membrane fuel cell. One of the key points to break through the limit of the carbon monoxide tolerance is the operation temperature of the fuel cell. Thus, a high temperature proton exchange membrane fuel cell is developed to improve the carbon monoxide tolerance and to simplify the gas purification process. The polybenzimidazole-based phosphoric acid-doped fuel cell is one of the most promis

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Wen, Chia-Hao, and 温佳豪. "Preparation of Pt/PyPBI-CNT catalysts and modification PBI membranes for high temperature proton exchange membrane fuel cells." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/cqq83f.

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碩士<br>元智大學<br>化學工程與材料科學學系<br>106<br>In order to combine fuel cell with methanol reformer, we prepared the membrane electrode assembly (MEA) which operation temperature close to the methanol reformer in this study. MEAs were prepared by grafting PSi-EP with H3PO4 proton exchange membrane and the catalyst was Pt/PyPBI-CNT which prepared by immobilizing platinum (Pt) nanoparticles on the surface of the PyPBI wrapped MWCNTs (PyPBI-CNTs). Cathodes were prepared by mixing Pt/PyPBI-CNT powder, binder, and solvent. Binder were the mixtures of polybenzimidazole (PBI) in the weight ratio of 0/5,1/4, and

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Lin, Jin-Yung, and 林靖詠. "Preparation of PBI catalyst layers for high-temperature proton exchange membrane fuel cells." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/84658349858719588701.

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碩士<br>元智大學<br>機械工程學系<br>98<br>Nafion in the low temperature proton exchange membrane (PEM) fuel cell can conducted proton with moderate moisture content, therefore when in the low humidity and high operation temperature up to 90℃ the membrane conductivity will decrease due to the water evaporation. In this study, we use the high polymer material polybenzimidazole (PBI) as a proton exchange membrane for high temperature PEMFC. PBI has good thermal stability, high anti-chemical corrosion ability and high glass transition temperature. PBI was used as the binder in the catalyst layers the membrane

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Cheng, Kuo-yao, and 鄭國曜. "Effects of Reformate on Performance of PBI/H3PO4 Proton Exchange Membrane Fuel Cell Stack." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/75661595700715922966.

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碩士<br>國立臺南大學<br>綠色能源科技研究所碩士班<br>101<br>In this study, the performance of a five-cell fuel cell stack performance by changing the nitrogen and carbon dioxide concentration was examined experimentally. The hydrogen concentration in the reformer gas is not the same and stable, some of them may have some poison gases which like carbon dioxide. The poison gases make the performance of fuel cells decay. For examining the performance variation, the polarization curve and EIS (electrochemical impedance spectroscopy) methods were presented in this study. The best operating temperature of fuel cell stac

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Lin, Wan-Sin, and 林婉歆. "Pt-C/PBI/DMAc solutions properties and preparation of membrane electrode assemblies for high temperature PEMFCs." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/22060763981605125791.

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碩士<br>元智大學<br>先進能源研究所<br>98<br>In this study, using static light scattering (SLS), gel permeation chromatography (GPC) and cyclic voltammetry(CV), we reported the dilute solutions properties of polybenzimidazole (PBI) in N,N’-dimethylacetamide (DMAc) solutions blended with LiCl and preparation of Pt-C/PBI membrane electrodes assemblies for high temperature fuel cells. Our GPC experimental results showed weight-average molecular weight (Mw) is 1.13×105 g/mol (PBI-113) and 2.53×105 g/mol (PBI-253) of PBIs synthesiszed in our lab. An ultrasonic coating made of electrode catalyst slurry solution,

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CHEN, WEI-CHENG, and 陳韋成. "High temperature PEM fuel cells and its PBI membrane doped with phosphoric acid and antimony chloride." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/24216054053970045614.

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碩士<br>國立臺灣科技大學<br>化學工程系<br>101<br>In recent years, the high-temperature proton exchange membrane (PEM) fuel cells have been developed to operate at 160 – 200?aC, such that its carbon monoxide tolerance can be improved and the fuel flexibility can be enhanced. Most of research efforts are focused on the membrane of phosphoric acid doped polybenzimidazole (PBI) and its variants. For those PEM fuel cells based on phosphoric acid doped PBI, the operation temperature is usually set at 160?aC. Adoption of a hybrid organic- inorganic PBI membrane could further raise the operation temperature and enha

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Pan, Chih-Hsuan, and 潘芷萱. "Characteristics of PBI and PTFE binder in catalyst layer for high temperature proton exchange membrane fuel cells." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/csfwuj.

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碩士<br>元智大學<br>化學工程與材料科學學系<br>106<br>The effects of PTFE and PBI binder properties on cell performance were investigated for high temperature proton exchange membrane fuel cell (PEMFC) in this study. PBI-epoxy membranes were used for MEA preparation. The performance of these MEAs was evaluated by accelerated aging test. However, several related measurements were conducted before and after ageing test at 160°C, 0 % RH to examine the change of characteristics of MEA components. The resulting electrodes and membrane were characterized by contact angle, thermogravimetric analysis (TGA), X-ray diffr

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Liu, Shih-Hao, and 劉士豪. "Prepareation of Nafion/PBI electro-spun fiber composite membrane and it''s application to fuel cells." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/34322973203700083649.

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碩士<br>元智大學<br>化學工程與材料科學學系<br>98<br>This study report the influence of polymerization time on the molecular weight of PBI (polybenzimidazole). The PBI with Mw of ~ 1.0×105 g/mol was mixed with DMAc (N,N’-dimethylacetamide) solvent and electrospun from the solution. The PBI electrospun nano-fiber film was crosslinked with glutaraldehyde. The tensile strength of the PBI nano-fiber film was around 37.2MPa. The high mechanical strength PBI nano-fiber film was then immersed in a Nafion solution to prepare Nafion/PBI-fiber composite membranes with a thickness of around 35 ?m. The power density of th

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Hofmann, Constanze. "Untersuchungen zur Elektrokatalyse von Hochtemperatur-Polymerelektrolytmembran-Brennstoffzellen (HT-PEMFCs)." Doctoral thesis, 2010. http://hdl.handle.net/11858/00-1735-0000-0006-B06B-9.

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Krüger, Andries Johannes. "Evaluation of process parameters and membranes for SO2 electrolysis / Andries Johannes Krüger." Thesis, 2015. http://hdl.handle.net/10394/16022.

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The environmentally unsafe by-products (CO2, H2S, NOx and SO2 for example) of using carbon-based fuels for energy generation have paved the way for research on cleaner, renewable and possibly cheaper alternative energy production methods. Hydrogen gas, which is considered as an energy carrier, can be applied in a fuel cell setup for the production of electrical energy. Although various methods of hydrogen production are available, sulphur-based thermochemical processes (such as the Hybrid Sulfur Process (HyS)) are favoured as alternative options for large scale application. The SO2 electrolyse

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Wang, Wei-Sheng, and 王韋勝. "Nafion/PBI membranes for DMFCs." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/73295268481148879555.

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碩士<br>元智大學<br>化學工程與材料科學學系<br>99<br>On this thesis, we prepare Nafion/PBI blend membranes and study their mechanical properties, proton conductivities, methanol permeateon and the application to direct methanol fuel cell (DMFC). We find the membrane with a Nafion/PBI wt ratio of 9/1 has a optimum property. The Nafion/PBI blend (9/1 g/g) with a thichness of 78 μm is used to prepare MEA and performed DMFC test. The experiment results show that the present membrane had a better DMFC performance than Nafion-117.

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Chang, Wei-kai, and 張維凱. "Preparations of PBI Membranes and PBI-PTFE composite membranes and their applications to fuel cells." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/68605430220064241329.

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碩士<br>元智大學<br>化學工程與材料科學學系<br>94<br>In this thesis PBI membranes (thickness 60~200 μm) were prepared by casting from LiCl / DMAc solutions, and PBI-PTFE composite membranes (20~36 μm thickness) were prepare by impregnating porous PTFE (poly tetrafluoroethylene) in PBI / LiCl / DMAc solutions. Both of these two membranes were than impregnating with phosphoric acid solution and were used to prepare membrane electrolyte assembly (MEA). Though PTFE has a lower conductivity than PBI, however, the high mechanical strength of PTFE allow the PBI-PTFE composite membranes to have a lower thickness when t

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Lin, Che-Yu, and 林哲宇. "Preparation and Performance Study of PBI/PBI-BS/Zr(HPO4)2 Composite Membranes." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/92564416675614308464.

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碩士<br>元智大學<br>化學工程與材料科學學系<br>96<br>In this thesis, polybenzimidazole (PBI) membrane was modified with sulfobutylated polybenzimidazole (PBI-BS) and zirconium phosphate (Zr(HPO4)2). The influences of Zr(HPO4)2 and PBI-BS on PBI PEMFC performance at 140~180℃ was investigated in this work. The chemical structures of PBI and PBI-BS were identified by FTIR spectrometer. The morphology of surface and cross section of the membrances was observed by SEM (Scanning Electron Microscope), and EDS (Energy Dispersive Spectrometer). TGA (thermogravimetric analysis) was used to carry out thermo properties of

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Liao, Jen-Ru, and 廖貞如. "Preparation and High Temperature Fuel Cell Performance of PBI/PBI-BS Blend Membranes." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/33252514867127464176.

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碩士<br>元智大學<br>化學工程與材料科學學系<br>97<br>In this thesis, we synthesized polybenzimidazole (PBI) and its derivative butyl sulfonated poly(polybenzimidazole) (PBI-BS). PBI/PBI-BS blend membranes were prepared with a PBI/PBI-BS wt ratio of 8/2. The chemical structure and physical properties of the membrane were investigated, using FTIR, SEM, EDS, and TGA. 400 h continuous stability life test and 298 h start/stop cycle test (10 h/start – 14 h/stop) on the MEA prepared from phosphoric acid-doped PBI/PBI-BS were conducted at 160℃with a current density= 200 mAcm−2. i-V polarization curve and AC-impedance t

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Hsieh, Yi-Shan, and 謝依珊. "Preparations and Performance Studies of PBI/PTFE andPBI/PBI-BS/PTFE Composite Membranes." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/11078163668215140178.

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碩士<br>元智大學<br>化學工程與材料科學學系<br>97<br>In this study, we synthesized polybenzimidazole (PBI) and its derivative butyl sulfonated polybenzimidazle (PBI-BS).The porous poly tetra fluoro ethylene (PTFE) was used as supporting membranes to reinforce PBI and PBI/PBI-BS (8/2 g/g) blend to prepare PBI/PTFE and PBI/PBI-BS/PTFE composite membranes. These two composite membranes were used to prepare membrane electrode assemblies (MEA). We performed 400 hr H2/O2 life test on PBI/PTFE MEA and 100 hr test on PBI/PBI-BS/PTFE MEA at 160 ℃ with a current density i = 200 mA/cm2. During long time life test, the i-V

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Davies, Benjamin. "Separation of CO2 using ultra-thin multi-layer polymeric membranes for compartmentalized fiber optic sensor applications." Thesis, 2014. http://hdl.handle.net/1828/5207.

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Carbon dioxide sequestration is one of many mitigation tools available to help reduce carbon dioxide emissions while other disposal/repurposing methods are being investigated. Geologic sequestration is the most stable option for long-term storage of carbon dioxide (CO2), with significant CO2 trapping occurring through mineralization within the first 20-50 years. A fiber optic based monitoring system has been proposed to provide real time concentrations of CO2 at various points throughout the geologic formation. The proposed sensor is sensitive to the refractive index (RI) of substances in dire

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Chou, Yu-Cheng, and 周祐成. "PBI crosslinked membranes-preparation and applications to PEMFC." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/25281257228284410116.

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碩士<br>元智大學<br>化學工程與材料科學學系<br>98<br>In this thesis, we synthesized polybenzimidazole (PBI) from 3,3’-diaminobenzidine and isophthalic acid. The molecular weight of PBI determined by GPC (gel permeation chromatography) with polystyrene as a standard was Mw = 2×105 g/mol. The crosslinked PBI was prepared by blending PBI with epoxy (Epon-828) resin with a N-H/epoxide equivalent ratio of 10/1. The tensile strength of PBI/epoxy crosslinked membrane was around 20％ higher than that of pure PBI , which allows the thickness of PBI/epoxy membrane (thickness ~ 45 μm) to be lower than that of PBI membrane

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Tsai, Ming-Chih, and 蔡明志. "Investigation on microstructure of phosphoric acid doped PBI membranes." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/hp79u2.

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碩士<br>國立臺灣科技大學<br>材料科學與工程系<br>104<br>Recently, there has been great interest in developing polybenzimidazole (PBI) membranes for high temperature Proton Exchange Membrane Fuel Cell (PEMFC). Research on PBI membranes for high-temp PEMFC has encounter many problems, such as high solubility of PBI, Pt poisoning and low proton conductivity. Herein, we prepared pata-polybenzimidazole membranes (p-PBI) by sol-gel method and compared it with commercially available meta-polybenzimidazole membrane (m-PBI) which was prepared by solution casting method. p-PBI with an acid doping level(ADL) of 10 PA/RU sh

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Liu, Yu-Chi, and 劉宥琪. "Preparation of PBI/PPA Membranes for High Temperature PEMFCs." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/19351551466367518099.

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碩士<br>元智大學<br>化學工程與材料科學學系<br>99<br>In this thesis, we synthesized polybenzimidazole (PBI) from 3,3’-diaminobenzidine and isophthalic acid . The molecular weight of PBI determined by GPC (gel permeation chromatography) with polystyrene as a standard was Mw = 2.05×105 g/mol. The polymerized find product mixture PBI with PPA was used to prepare the proton exchange membrane. The morphology of surface and cross section of the membrances was investigated using by SEM (Scanning Electron Microscope). TGA (thermogravimetric analysis) was used to study the thermo properties of membranes. The membranes w

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Huang, Jun-Ru, and 黃俊儒. "PBI-PTFE Composite Membranes Preparation and Applications to Fuel Cells." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/66773974820467195044.

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碩士<br>元智大學<br>化學工程與材料科學學系<br>98<br>In this study, the porous (polytetra fluoro ethylene) (PTFE) was used as a supporting membrane and immersed in a polybenzimidazole(PBI)/n, n’-dimethyl acetamide(DMAc) solution to prepare PBI/PTFE composite membranes. These crosslinked composite membrane was used to prepare membrane electrode assemblies (MEA). We performed 300 hr H2/O2 life test on PBI/PTFE MEA at 160℃ at a current density i = 200 mA/cm2. During long time life test, the i-V curve measurement was performed every 12 hr.

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Tang, Tsung-Hsien, and 湯宗弦. "PBI grafted side chain phosphate membranes for high-temperature PEMFCs." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/27148251143471699884.

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碩士<br>元智大學<br>化學工程與材料科學學系<br>99<br>本研究合成聚苯並咪唑(PBI)和接枝磷酸支鏈的苯甲基磷酸聚苯並咪唑(PBI-BPA)，利用FTIR、NMR及GPC進行結構分析及分子量測定。以PBI/PBI-BPA製備摻合膜並浸漬磷酸。磷酸含酸率測定顯示PBI-BPA摻合重量比例增加，膜材含磷酸率增加，但PBI-BPA比例超過40%以上膜材會完全被磷酸溶解。160℃質子交換膜燃料電池單電池性能測試顯示，PBI/PBI-BPA (重量比8 : 2) MEA具有良好的電池性能。電池在540小時開關循環測試中，開機性能在cycle 11 (t = 240 h)達到最佳，cycle 16 (t = 360 h)時性能衰退至最低。交流阻抗分析顯示觸媒阻抗上升是造成電池性能衰退的主因。循環伏安(CV)數據顯示電極中觸媒活性面積下降。

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Shen, Shih-Yuan, and 沈詩源. "PBI-PPA/PTFE composite membranes preparation and applications to fuel cells." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/70742759067911549632.

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碩士<br>元智大學<br>化學工程與材料科學學系<br>99<br>In this study, we synthesize polybenzimidazole (PBI) from isophthalic acid and 3,3’-diaminobenzidine monomers using polyphosphoric acid (PPA) as a solvent. The polymer structures and molecular weight are investigated using FTIR spectroscopy and GPC. The porous polytetrafluoroethylene (PTFE) is used as a supporting membranes to reinforce the polymerized PBI–PPA blend and prepare PBI-PPA/PTFE composite membrane (thickness 40-55 µm). The PBI-PPA/PTFE composite membranes have been fabricated for 160 ℃high temperature proton exchange membrane fuel cells. PBI-PPA-

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Wang, Ming-Tsung, and 王明琮. "PBI/SPEEK and Nafion/PAN nanofiber composite membranes－Preparation and applications to fuel cells." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/54100288225266849149.

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碩士<br>元智大學<br>化學工程與材料科學學系<br>98<br>In this study, we use electro-spinning technology to make two series of proton exchange composite membranes. PEEK (polyether ether ketone) was modified by slufonation, nitration and reduction. The SPEEK-NH2 nanof-fiber thin film was prepared by electro-spinning from a SPEEK-NH2/DMAc (N,N,-dimethyl acetamide) solution. The electro-spin SPEEK-NH2 nono-fiber film was then treated with glutaraldehyde to proceed crosslink reaction. Crosslinked SPEEK-NH2 film was then impregnated in PBI/DMAc solution and heated under 120℃ to make PBI/SPEEK composite membrane. From

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"Evaluation of PCI reverse osmosis membrane on landfill leachate." Thesis, 2010. http://hdl.handle.net/10413/1447.

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Yu, Bor Chern, and 余柏辰. "Preparation of PBI/Graphene Oxide Composite Membranes by Spin Coating Method for Alkaline Direct Alcohol Fuel Cells." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/g848gh.

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Yu, Hsin-Han, and 尤信翰. "A study of Frame, Membrane, Solid,Shell, Spring and Cable elementsusing Vector Form Intrinsic Finite Element Method in PNS-PBC framework." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/10172079400950904385.

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碩士<br>中原大學<br>土木工程研究所<br>100<br>Abstract The main purpose of this study is to add some functions for different types of the elements into the Platform for Numerical Simulation - Point Based Computing ( PNS-PBC ) framework. This framework is developed from the National Center for Research on Earthquake Engineering (NCREE) in 2011. The PNS-PBC is based on two methods which are vector form intrinsic finite element (VFIFE or V-5) method and discrete element method (DEM). In this study, the formulations of the shell, cable, spring, 4 point solid, Euler beam, Timoshenko beam in VFIFE method are impl

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Βόγλη, Ευφροσύνη. "Συγκριτική μελέτη πρωτονίωσης / εμποτισμού πολυμερικών ηλεκτρολυτικών μεμβρανών για στοιχεία καυσίμου υψηλής θερμοκρασίας". Thesis, 2009. http://nemertes.lis.upatras.gr/jspui/handle/10889/1629.

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Η συγκεκριμένη διατριβή ειδίκευσης αποτελεί μια προσπάθεια συγκριτικής μελέτης νέων πολυμερικών ηλεκτρολυτικών μεμβρανών για στοιχεία καύσιμου υψηλής θερμοκρασίας, με το PBI (πολυβενζιμιδαζόλιο). Αρχικά πραγματοποιήθηκε μια φασματοσκοπική και ηλεκτροχημική μελέτη των μεμβρανών. Πιο συγκεκριμένα μελετήθηκαν η μεμβράνη ADVENT TPS® και τα μίγματα SFSX-PBIY (σουλφονωμένο δεκαφλουοροδιφαινύλιο με εξαφλουοροισοπροπυλενό- διφαινολη - πολυβενζιμιδαζόλιο) εμποτισμένα με πυκνό διάλυμα φωσφορικού οξέος 85%. Η ηλεκτροχημική μελέτη αφορούσε τη μέτρηση της ιοντικής αγωγιμότητας συναρτήσει του βαθμού εμποτ

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