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

Result code in 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>

Alternative codes found

RIV/61989100:27640/07:00015156

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

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

Original language description

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

Czech name

Exfoliace/delaminace kaolinitu nízkoteplotním vymýváním interkalátů kaolinitu s močovinou

Czech description

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

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

DB - Geology and mineralogy

OECD FORD branch

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Project

<a href="/en/project/GA205%2F05%2F2548" target="_blank" >GA205/05/2548: Nanomaterials based on structurally modified clay minerals</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2006

Confidentiality

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

Name of the periodical

Applied Clay Science

ISSN

0169-1317

e-ISSN

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Volume of the periodical

35

Issue of the periodical within the volume

1-2

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

11

Pages from-to

108-118

UT code for WoS article

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EID of the result in the Scopus database

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