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1

Morphological Evaluation of Variously Intercalated Pre-baked Clay

Ullah H., Imtiaz A.

Polish Journal of Chemical Technology

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2014

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Vol. 16, nr 2

5--11

EN

The use of porous materials is enjoying tremendous popularity and attention of the advance scientific communities due to their excellent adsorptive and catalytic activities. Clays are one of the most important candidates in the porous community which shows the above mentioned activities after modifing with a different intercalating agent. The paper is focused on the infiuence of some inorganic intercalating agents (NaOH) on the morphology of the variously intercalated clay samples. The alkali metal was used as the inorganic intercalating agent. The effect of intercalation temperature, intercalation agent concentration and intercalation time on the pre-baked clay morphology were also part of the study. Scanning electron microscopy (SEM) study was performed to evaluate the morphological changes of the resultant intercalates. Different morphological properties were improved significantly in the case of the inorganically modified clay samples. Thus, such intercalations are suggested to be effective if the clays under study are to be used for different industrial process at elevated conditions.

2

Wpływ niekonwencjonalnych modyfikatorów na stabilność strukturalną i odporność termiczną wysokotemperaturowego smaru plastycznego. Cz. I

Pawelec E., Drabik J.

Tribologia

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2008

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nr 3

235-246

PL

Zbadano możliwość kształtowania właściwości funkcjonalnych wysokotemperaturowego smaru plastycznego poprzez udział nietoksycznych składników stosowanych dotychczas poza techniką smarowniczą. Wykazano, że istnieje możliwość takiego ilościowo-jakościowego doboru bazy olejowej, zagęszczaczy i modyfikatorów, który pozwala na kształtowanie właściwości funkcjonalnych smaru na poziomie wymaganym aplikacją przy zachowaniu jego ekologicznego charakteru. Stwierdzono decydujący wpływ rodzaju i koncentracji modyfikatora właściwości tiksotropowych na odporność struktury smaru na działanie wymuszeń termicznych. Zastosowanie modyfikatora o bardziej rozwiniętej powierzchni, zapewnia uzyskanie smaru plastycznego o odporności i stabilności termicznej wymaganej dla smarów wysokotemperaturowych.

EN

The possibility of the formation functional properties of grease was researched through participation of non-toxic components, which have been used until now are beyond grease technology. It was shown that there is the possibility of such a quality-quantity selection of oil base, thickeners and modifiers which allows the formation of the functional properties of grease on a level demanded by application with holding its ecological nature. Decisive influence of the type and concentration of the modifier of rheological properties on the resistance of the grease structure to the activity of thermal extortion was stated. The modifiers which have more surface area were beneficial to obtaining stability and to the thermal resistance of high-temperature grease.

3

Modified acrylamide copolymers as flocculants for model aqueous suspensions

Drzycimska A., Szmidt B., Spychaj T.

Polish Journal of Chemical Technology

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2007

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Vol. 9, nr 2

10-14

EN

Two groups of acrylamide copolymers have been obtained by inverse microemulsion polymerization using: (i) acrylamide (AAm) with [2-(acryloyloxy)ethyl]trimethylammonium chloride (AETAC) in the presence of sodium montmorillonite (MMT), and (ii) acrylamide with acrylic acid (AA) in the presence of aluminum sulphate. The received materials were characterised by capillary viscometry and the DSC methods, as well as the flocculation performances of the modified copolymers in the treatment of aqueous model suspensions of talc and calcium montmorillonite have been investigated. The effectiveness of the acrylamide flocculants was evaluated on the basis of the suspension extinction reduction and the sludge volume. The obtained results have been compared while using the modified materials and appropriate anionic and cationic AAm copolymers.