Resins containing extractants: Morphology of polymers prepared by polymerization of vinyl monomers in the presence of uranium‐selective extractants

Belfer, S.; Egozy, Yair; Korngold, E.

doi:10.1002/app.1984.070291216

Cited by 7 publications

(5 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This agglomeration of microspheres inside the beads can cause an opaque appearance because of these structures. The greater compactness of polymeric areas on the surface than inside the microspheres has been attributed to compression due to the interfacial tension between the organic phase and the aqueous phase during the suspension polymerization [17] . Figure 2 and Figure 3 show the SEM results of the core-shell microspheres.…”

Section: Instrumentation and Characterizationmentioning

confidence: 99%

Core-shell magnetic particles obtained by seeded suspension polymerization of acrylic monomers

et al. 2018

View full text Add to dashboard Cite

Core-shell magnetic polymer particles were synthesized by seeded suspension polymerization. The core was made of poly(methyl methacrylate-co-divinylbenzene) and a mixture of magnetite, maghemite and goethite (P(MMA-co-DVB)-M). The shell was composed of poly(glycidyl methacrylate-co-divinylbenzene) (P(GMA-co-DVB)). These particles were characterized by infrared spectrometry (FTIR), thermal analysis (TG), scanning electron microscopy (SEM), dynamic light scattering (DLS) and vibrating sample magnetometry (VSM). The results showed the formation of core-shells with good magnetic properties (≈7.1 emu/g) and good thermal resistance (≈300 ºC). The light scattering experiments showed that the particle size of these materials changed from 5-90 microns (core) to 5-120 microns (core-shell). Scanning electron microscopic images were useful to show the formation of P(GMA-co-DVB) shells on P(MMA-co-DVB)-M cores. The materials synthesized in this work have potential to be modified and employed in magnetic separation processes in the biotech and environmental fields.

show abstract

Section: Instrumentation and Characterizationmentioning

confidence: 99%

Core-shell magnetic particles obtained by seeded suspension polymerization of acrylic monomers

et al. 2018

View full text Add to dashboard Cite

show abstract

“…A impregnação dos suportes póssíntese apresenta limitações devido ao carreamento do complexante durante a retenção e eluição dos íons e também à dificuldade de se obter uma razão ótima entre o agente complexante e o suporte. O grau de impregnação ótimo corresponde a uma quantidade mínima necessária para cobrir toda a superfície do suporte como um filme líquido homogêneo [5] .…”

Section: Celina C R Barbosa José Waldemar Sd Cunha Instituto Deunclassified

Copolímeros de estireno-divinilbenzeno impregnados com agentes complexantes organofosforados para separação de terras raras

1998

View full text Add to dashboard Cite

RESUMO: Copolímeros de estireno-divinilbenzeno para aplicação em cromatografia de extração foram sintetizados em presença de agentes complexantes seletivos para terras raras, o fosfato monoácido de bis(2-etil-hexila), DEHPA e o 2-etil-hexil fosfonato monoácido de 2-etil-hexila, EHEHPA. Os copolímeros foram preparados através de polimerização em suspensão utilizando como diluentes os agentes complexantes puros ou combinados com o solvente tolueno (TOL). A influência das condições de síntese, tais como: a razão agente complexante/TOL; o grau de diluição dos monômeros e o teor de divinilbenzeno, na estrutura porosa dos copolímeros foi investigada através de suas características físicas tais como densidade aparente, volume de poros fixos, área específica e através de microscopia ótica e eletrônica de varredura. Os copolímeros foram avaliados em relação ao processo de separação de terras raras. Assim foram determinadas a capacidade total e a cinética de complexação em relação ao íon gadolínio. O teor de agente complexante impregnado em cada suporte foi função da quantidade do agente complexante nas misturas. Foi otimizada a quantidade máxima do agente complexante que pode ser utilizada na síntese, de modo a obter suportes com alta capacidade de complexação, sem o comprometimento de sua resistência mecânica. A capacidade total de complexação variou com a quantidade de agente complexante impregnado no suporte e a cinética de complexação variou principalmente com o diâmetro médio de poros, pois este determina a velocidade de difusão dos íons no suporte.

show abstract

“…Chemical compounds can be separated through identification and quantification [28,29]. Adsorption resins have a specific area and pore diameter for rapid diffusion of ions and improved extraction kinetics with an increase in the complexing capacity [30]. Dowex TM Optipore TM SD-2 has been used in the food industry to remove color, flavor and odor in sweeteners as it has pore structures to maximize the load, as well as the high mechanical, chemical and thermal capacity [31].…”

Section: Introductionmentioning

confidence: 99%

Removal of Pigments from Sugarcane Cells by Adsorbent Chromatographic Column

Gr¹,

Cl²

2016

Ann Chromatogr Sep Tech

View full text Add to dashboard Cite

Pigments are widely distributed in sugarcane plant cells and have been associated with color in sugarcane juice for white sugar production. Chlorophylls, phenolics and flavonoids compounds are some of those pigments. Mechanized harvesting increases the adding of cane tops to processing and the study of these compounds allows us to understand their impact on the final product. The aim was to separate and quantify these compounds obtained from sugarcane top ethanolic extracts. The chromatographic occurred in adsorption resin. The quantification was made in spectrophotometric systems. These methods allow separation and quantification of compounds and even observation of polarities of molecules compared to the eluents.

show abstract

Resins containing extractants: Morphology of polymers prepared by polymerization of vinyl monomers in the presence of uranium‐selective extractants

Cited by 7 publications

References 16 publications

Core-shell magnetic particles obtained by seeded suspension polymerization of acrylic monomers

Core-shell magnetic particles obtained by seeded suspension polymerization of acrylic monomers

Copolímeros de estireno-divinilbenzeno impregnados com agentes complexantes organofosforados para separação de terras raras

Removal of Pigments from Sugarcane Cells by Adsorbent Chromatographic Column

Contact Info

Product

Resources

About