MAGNETIC NANOSTRUCTURES BASED ON KAOLINITE

The invention relates to a process for preparing magnetic nanostructures to be employed in security paper manufacturing. According to the invention, the process consists in magnetite synthesis using the method of in-situ co-precipitation, followed by the adsorption of β-glycerol phosphate, 2-phospho...

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Bibliographische Detailangaben
Hauptverfasser:	TURCU RODICA PAULA, NAN ALEXANDRINA EMILIA
Format:	Patent
Sprache:	eng ; rum
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOUNDS THEREOF ELECTRICITY INDUCTANCES INORGANIC CHEMISTRY MAGNETS MANUFACTURE OR TREATMENT THEREOF METALLURGY NANOSTRUCTURES FORMED BY MANIPULATION OF INDIVIDUAL ATOMS,MOLECULES, OR LIMITED COLLECTIONS OF ATOMS OR MOLECULES ASDISCRETE UNITS NANOTECHNOLOGY NON-METALLIC ELEMENTS PERFORMING OPERATIONS SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES TRANSFORMERS TRANSPORTING
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Beschreibung
Zusammenfassung:	The invention relates to a process for preparing magnetic nanostructures to be employed in security paper manufacturing. According to the invention, the process consists in magnetite synthesis using the method of in-situ co-precipitation, followed by the adsorption of β-glycerol phosphate, 2-phospho-L-ascorbic acid or D-glucose-6-phosphate on the surface of magnetite nanoparticles, after which the kaolinite adsorption is performed with formation of kaolinite-based magnetic nanoparticles, having a value of saturation magnetization of 25 emu/g. Invenţia se referă la un procedeu de obţinere a unor nanostructuri magnetice, utilizate la fabricarea hârtiei securizate. Procedeul conform invenţiei constă în sinteza magnetitei prin metoda coprecipitării, după care se efectuează adsorbţia de β-glicerol fosfat, acid 2-fosfo-L-ascorbic sau D-glucoz-6-fosfat pe suprafaţa nanoparticulelor de magnetită şi, în continuare, se efectuează adsorbţia caolinitului cu formarea nanostructurilor magnetice pe bază de caolinit, având o valoare a magnetizării de saturaţie de 25 emu/g.