Exfoliace/delaminace kaolinitu nízkoteplotním vymýváním interkalátů kaolinitu s močovinou

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27640%2F06%3A00014373" target="_blank" >RIV/61989100:27640/06:00014373 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27640/07:00015156

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Exfoliation/delamination of kaolinite by low-temperature washing of kaolinite-urea intercalates

Popis výsledku v původním jazyce

The short milling effects of two kaolinite fractions (< 5 &#956;m (S5), 5-45 &#956;m (S)), previously expanded by intercalation with urea (U) and exfoliated/delaminated using low-temperature procedures, were studied. Kaolinite samples were examined by X-ray powder diffraction, and specific surface area, particle size distribution and infrared spectra were measured. Samples intercalated with different urea concentrations and exfoliated during thermal or low-temperature washing exhibit a variable intensity of the 001 diffractions of kaolinite (K) and interstratified intermediate kaolinite (H) with randomly interstratified layers of grafted urea and water. The H/K peak intensity ratio for samples S and S5 previously intercalated with 20 % U is significantly higher than for those intercalated with 40 % U. The procedure is quicker than milling and thermal washing operations reported so far, and, moreover, it yields SSA values comparable to those obtained for exfoliated/delaminated kaolinite

Název v anglickém jazyce

Exfoliation/delamination of kaolinite by low-temperature washing of kaolinite-urea intercalates

Popis výsledku anglicky

The short milling effects of two kaolinite fractions (< 5 &#956;m (S5), 5-45 &#956;m (S)), previously expanded by intercalation with urea (U) and exfoliated/delaminated using low-temperature procedures, were studied. Kaolinite samples were examined by X-ray powder diffraction, and specific surface area, particle size distribution and infrared spectra were measured. Samples intercalated with different urea concentrations and exfoliated during thermal or low-temperature washing exhibit a variable intensity of the 001 diffractions of kaolinite (K) and interstratified intermediate kaolinite (H) with randomly interstratified layers of grafted urea and water. The H/K peak intensity ratio for samples S and S5 previously intercalated with 20 % U is significantly higher than for those intercalated with 40 % U. The procedure is quicker than milling and thermal washing operations reported so far, and, moreover, it yields SSA values comparable to those obtained for exfoliated/delaminated kaolinite

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DB - Geologie a mineralogie

OECD FORD obor

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Projekt

<a href="/cs/project/GA205%2F05%2F2548" target="_blank" >GA205/05/2548: Nanomateriály založené na strukturně modifikovaných jílových minerálech</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2006

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Applied Clay Science

ISSN

0169-1317

e-ISSN

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Svazek periodika

35

Číslo periodika v rámci svazku

1-2

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

108-118

Kód UT WoS článku

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EID výsledku v databázi Scopus

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