Removal of chlorinated volatile organic contaminants from water by pervaporation using a novel polyurethane urea–poly (methyl methacrylate) interpenetrating network membrane

Das, Swatilekha; Banthia, A. K.; Adhikari, Basudam

doi:10.1016/j.ces.2006.06.014

Cited by 29 publications

(6 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Pequenas quantidades de micro-ou nanocarga, são suficientes para agregar ao polímero uma melhora expressiva em suas propriedades, reduzindo o custo e o peso dos artigos acabados em comparação aos compósitos convencionais [10] . Membranas poliméricas densas têm sido extensivamente estudadas para o emprego em separação de gases, incluindo: o enriquecimento de nitrogênio e de oxigênio; a recuperação de hidrogênio; a remoção de gases ácidos (CO 2 , H 2 S) do gás natural e de voláteis orgânicos; a desidratação de ar e do gás natural, além de outras aplicações, nas áreas química, têxtil, biomédica, petroquímica, farmacêutica e alimentícia [11][12][13][14][15][16][17][18][19][20] . Os poliuretanos (PU) são materiais que têm sido investigados na utilização em membranas densas permeáveis a gases devido à possibilidade de adequação de suas propriedades de transporte através da variação da microestrutura do polímero [15,[21][22][23][24][25][26] .…”

Section: -Avaliação Das Propriedades De Barreira De Membranas Obtidasunclassified

Avaliação das Propriedades de Barreira de Membranas Obtidas a partir de Dispersões Aquosas à Base de Poliuretanos e Argila

Barboza¹,

Delpech²,

Garcia³

et al. 2014

Polímeros

View full text Add to dashboard Cite

Resumo: Formulações de aplicação não-poluente à base de poliuretanos em dispersão aquosa (WPUs), com adição de argila montmorilonita hidrofílica (CWPUs), foram sintetizadas. A permeabilidade ao dióxido de carbono (CO 2 ) de membranas densas obtidas a partir do espalhamento das dispersões foi avaliada. Os reagentes empregados na síntese dos materiais foram: poli(glicol proplilênico) (PPG), copolímero em bloco à base de segmentos de poli(glicol etilênico) e poli(glicol propilênico) (EG-b-PG), ácido dimetilolpropiônico (DMPA), diisocianato de isoforona (IPDI) e etilenodiamina (EDA), como extensor de cadeia, levando à formação de ligações de ureia. Diferentes formulações foram obtidas variando-se a proporção de segmentos à base de poli(glicol etilênico) (PEG) e o teor de argila (0,5 e 1 %). As dispersões foram avaliadas em termos de teor de sólidos e viscosidade aparente. As membranas foram caracterizadas por espectrometria na região do infravermelho (FTIR) e permeabilidade ao dióxido de carbono (CO 2 ). A influência nas propriedades de barreira, conferida pela presença da argila e do copolímero em bloco, foi verificada por ensaios de permeabilidade. A permeabilidade ao CO 2 aumentou com o aumento no teor segmentos de PEG e diminuiu com a inserção da argila, uma vez que esta é impermeável a gases, formando caminhos preferenciais na matriz polimérica que retardam a difusão das moléculas de gás. Palavras-chave: Poliuretanos, dispersões aquosas, argila, montmorilonita, membranas, permeabilidade a gases, propriedades de barreira. Evaluation of Carbon Dioxide Gas Barrier Properties of Membranes Obtained from Aqueous Dispersions Based on Polyurethane and ClayAbstract: Non-polluting aqueous polyurethane-based dispersions were synthesized in the presence and absence of montmorillonite hydrophilic clay (WPUs and CWPUs, respectively). The permeability of carbon dioxide (CO 2 ) through dense membranes obtained from the dispersions was evaluated. The reagents used in the synthesis of the materials were: poly(propylene glycol) (PPG), block copolymer of poly(ethylene glycol) and poly(propylene glycol) (EG-b-PG), dimethylolpropionic acid (DMPA), isophorone diisocyanate (IPDI) and ethylene diamine (EDA) as chain extender, leading to the formation of urea linkages. The proportion of poly(ethylene glycol) (PEG) segments and clay content (0.5 and 1%) was varied in the formulations. The dispersions were evaluated in terms of solids content and apparent viscosity. The membranes were characterized by infrared spectrometry (FTIR) and permeability to carbon dioxide (CO 2 ). The influence on the gas barrier properties, imparted by different contents of PEG segments in polyurethane chains, and by the clay in the formulations was verified. The permeability of CO 2 increased with increasing amounts of PEG segments and decreased with the insertion of clay, since the latter is impermeable to gas and forms, in the polymeric matrix, tortuous pathways that retard gas diffusion.

show abstract

Section: -Avaliação Das Propriedades De Barreira De Membranas Obtidasunclassified

Avaliação das Propriedades de Barreira de Membranas Obtidas a partir de Dispersões Aquosas à Base de Poliuretanos e Argila

Barboza¹,

Delpech²,

Garcia³

et al. 2014

Polímeros

View full text Add to dashboard Cite

show abstract

“… It appears from the chemical nature of chlorinated VOCs that a membrane with both flexible non-polar and rigid polar organic domains would be more suitable for their separation [41]. Segmented polyurethanes with elastomeric soft domain and rigid urethane as well as urea domain can be projected as an ideal material of such type.…”

Section: Pervaporation Of Voc In Aqueous Mediummentioning

confidence: 99%

Ambient Air Non-Methane Volatile Organic Compound (NMVOC) Study Initiatives in India–A Review

Talapatra¹,

Srivastava²

2011

JEP

View full text Add to dashboard Cite

Different aspects of Volatile Organic Compounds (VOCs) are being investigated in details by different research groups in Indian institutes. The spectrum covers measuring technologies, source apportionment and variability studies, all these are in due process of preparing a guideline for the sustainable development in terms of industrial, infrastructural as well as overall growth of the country. Both the outdoor and indoor air quality has significant impact on human health. With special concentration on BTEX and HAPs, the health related investigations are conducted as part of interdisciplinary studies of environmental science. Newer technologies to remove VOCs under specific industrial and practical conditions are getting emerged as a comparatively new era. It addresses fields like adsorption, condensation, pervaporation, biodegradation and catalytic combustion. Besides, different kinds of biofilters have drawn significant attention nowadays. The final selection of appropriate technology depends on type and concentrations of VOCs, extent of separation required and cost involved. All these technologies are although well studied, but could not be adopted for regular commercial usage till date. There is scope to explore new horizons as well as regular monitoring on the introduced pathways to limit VOC emission in the ambient air. This review aims at a concise discussion on all the areas that come under the umbrella of non-methane VOC technologies.

show abstract

“…For example, vacuum membrane distillation has been tested for the removal of VOCs from water [5][6][7][8]. Furthermore, pervaporation has been proved as a promising separation process for VOCs removal from aqueous feed solution using different types of membranes [5,[9][10][11][12][13][14][15][16][17][18] and has the potential to be one of the most common techniques in environmental engineering for water purification. The performance of both separation processes, i.e.…”

Section: Introductionmentioning

confidence: 99%

Modeling and multi-response optimization of pervaporation of organic aqueous solutions using desirability function approach

Cojocaru

Khayet

Zakrzewska-Trznadel

et al. 2009

Journal of Hazardous Materials

View full text Add to dashboard Cite

Removal of chlorinated volatile organic contaminants from water by pervaporation using a novel polyurethane urea–poly (methyl methacrylate) interpenetrating network membrane

Cited by 29 publications

References 31 publications

Avaliação das Propriedades de Barreira de Membranas Obtidas a partir de Dispersões Aquosas à Base de Poliuretanos e Argila

Avaliação das Propriedades de Barreira de Membranas Obtidas a partir de Dispersões Aquosas à Base de Poliuretanos e Argila

Ambient Air Non-Methane Volatile Organic Compound (NMVOC) Study Initiatives in India–A Review

Modeling and multi-response optimization of pervaporation of organic aqueous solutions using desirability function approach

Contact Info

Product

Resources

About