Wyniki wyszukiwania - Biblioteka Nauki

1

Magnetic field effects on surfactants adsorption on the solid surface as regards of its wettability

100%

Hołysz L. , Chibowski E. , Terpiłowski K.

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tom Vol. 56, iss. 6

101--113

EN

The static magnetic field MF (0.44 T) effects on the adsorption of three surfactants: cationic bromide (DTAB) and hexadecyltrimethylammonium bromide (CTAB), and anionic sodium dodecylsulfate (SDS) from their 10-3 M solutions were studied on bare and low-temperature air plasma treated glass plates. The surface properties of the adsorbed surfactants layers were determined via the water advancing and receding contact angles measurements and then calculation of the apparent surface free energy. An optical profilometer was used to determine the structure and topography of the adsorbed layers. The DTAB and SDS concentrations were below their critical micelle concentration and that of CTAB very close to its cmc. The results showed that in the case of DTAB solution (much below its cmc) a small decrease in the contact angle appeared while in CTAB (close to its cmc) an increase in the contact angle value was observed if adsorbed in the MF presence. Quite good reproducibility of the contact angle values was obtained. This was not the case for the SDS solution where the contact angle values were scattered. The reason was that the anionic surfactant did not adsorb homogeneously on the negatively charged glass surface. The contact angles and the calculated values of the work of water spreading clearly show that MF influences the structure of the surfactant adsorbed layer which was also supported by the optical profilometry images.

2

Modification of the structure of the layers of superficial soda - calcium - silicon glasses nano molecules inorganic compounds

86%

Drajewicz M. , Sieniawski J.

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2012

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tom Vol. 53, nr 2

76--80

EN

Purpose: Finding a new surface treatment of glass. Design/methodology/approach: Testing results of the glass operational properties, such as bending strength, scratching resistance, micro-hardness, chemical resistance and optical properties have been presented. Nano-molecules were spread onto the heated glass surface, or onto cold glass surface and then heated up to temperatures close to the glass transformation, when nano-molecules penetrate into the glass surface. Findings: Refining method of soda - calcium - silicon glassy surfaces with inorganic compounds nanomolecules assures profitable operational properties of the glass, such as increased bending strength, scratching resistance, micro-hardness and chemical resistance without deterioration of the optical properties. Research limitations/implications: Structural definition of inorganic compounds nano-powders exposed to thermal processing, including grain-size analysis has been discussed. Practical implications: Optimal technical and technological parameters of the refining process have been selected. Originality/value: The presented method undoubtedly develops new possibilities not only in case of container glass, float glass and glass fibres but also in the field of glass processing.

3

Nowa konwencja zwiększenia wytrzymałości mechanicznej powierzchni szkła

86%

Drajewicz M. , Wasylak J.

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tom R. 62, nr 1

16-19

PL

Metoda została opracowana w celu poprawienia struktury warstwy powierzchniowej szkieł sodowo - wapniowo - krzemianowych. W tym celu wykorzystano mieszaninę nanocząstek związków aluminium, które zapewniają korzystne właściwości, takie jak wzrost wytrzymałości na zginanie, udarności, mikrotwardości, odporności chemicznej przy niezmiennych własnościach optycznych. Przygotowane nanocząstki aluminium nanoszone są na powierzchnię szkła na gorącym odcinku uformowanych wcześniej wyrobów szklanych (w przypadku opakowań, baloników żarówkowych) lub bezpośrednio przy formowaniu szkła płaskiego metodą float, walcowaniu szkła, wyciąganiu rur szklanych, włókna oraz w procesie przetwórstwa szkła. W tym przypadku nanocząstki aluminium nanoszone są na zimną powierzchnię szkła, następnie podgrzewane do temperatur bliskich temperaturze transformacji szkła. Proces dyfuzji nanocząstek na powierzchni szkła odbywa się w etapie odprężania uformowanych wyrobów szklanych (szkło opakowaniowe, baloniki żarówkowe, szkło płaskie, włókno szklane, czy też szkło przetwarzane). Powierzchnia szkła ulega modyfikacji, tworzy się cienka warstwa aluminium, dzięki której szkło uzyskuje znacznie lepsze właściwości mechaniczne, chemiczne i termiczne.

EN

The method was worked out to refining the surface of soda - calcium - silicon glassy surfaces with aluminum compounds nano-molecules which assures simultaneously profitable properties usable glasses, such as increased bending strength, scratching resistance, micro-hardness and chemical resistance without deterioration of the optical properties. The invention applies to uses earlier prepared nano-molecules aluminum compounds, which are spread onto the glass surface on the hot section formed earlier glass product (container glass, lighting balloons) or also directly near forms flat glass, rolling of the glass, extraction glass pipes, glass fibers, as well as to glass processing. In this case nano-molecules aluminum compounds could be spread onto the cold surface of the glass, and then heated up to the temperature of the glass transformation, when nano-molecules penetrate into the glass surface. After such spreading, process of diffusion of the nano-molecules on the glass surface takes place within the phase of the formed glass product annealing (container glass, lighting balloons, flat glass, fibers glass, glass processing). The method of refining the surface is characteristic this that we get the structure modification of the glass surface through the ions of aluminum. The thin layer on the glass surface was causes the improvement of chemical, thermal and mechanical properties.

4

Adhesion of humic acids to nonreactive surfaces: effect on surface free energy and wettability of glass

86%

Jozefaciuk G. , Hajnos M. , Sokolowska Z. , Stawinski J. , Polubesova T. , Ponizovskij A.

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nr 4