SI23265A - Dispersions based on pigmented nanocrystalline titanium (iv) oxide incrystal form rutile for wood painting systems - Google Patents
Dispersions based on pigmented nanocrystalline titanium (iv) oxide incrystal form rutile for wood painting systems Download PDFInfo
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DISPERZIJE NA OSNOVI PIGMENTIRANEGADISPERSIONS BASED ON PIGMENTED
NANOKRISTALINIČNEGA TITANOVEGA (IV) OKSIDA V KRISTALNINANOCRYSTALINIC TITANIUM (IV) OXIDE IN CRYSTAL
OBLIKI RUTIL ZA LESNE PREMAZNE SISTEMEFORMS FOR WOOD COATING SYSTEMS
Predmet izuma je sinteza disperzij na osnovi pigmentiranega nanokristaliničnega titanovega (IV) oksida v kristalni obliki rutil, s povprečno velikostjo delcev v območju med 10 nm in 50 nm, ki zaradi visoko oksidacij ske sposobnosti, hidrofilnosti in kemijske obstojnosti pod vplivom UV-svetlobe sproži redukcijsko ciklične površinsko aktivne procese ter mineralizacijo organskih polutantov pri fotokatalitičnem odstranjevanju nečistoč in mikroorganizmov v različnih lesnih premaznih sistemih.The subject of the invention is the synthesis of dispersions based on pigmented nanocrystalline titanium (IV) oxide in rutile crystalline form, with an average particle size in the range of 10 nm to 50 nm, which, due to its high oxidation ability, hydrophilicity and chemical stability, under the influence of UV light cyclical surfactant processes and mineralization of organic pollutants in photocatalytic removal of impurities and microorganisms in different wood coating systems.
Uporabne lastnosti pigmentiranega nanokristaliničnega titanovega (IV) oksida v kristalni obliki rutil, izvirajo iz njegove fotokatalitske sposobnosti zaščite materialov pred svetlobnimi in vremenskimi vplivi ter so v osnovi določene z velikostjo in obliko pigmentiranih nanodelcev, kristalno strukturo in kemijsko sestavo ter prilagojene pogojem uporabe za lesne premazne sisteme.Useful properties of pigmented nanocrystalline titanium (IV) oxide in rutile crystalline form are derived from its photocatalytic ability to protect materials from light and weather, and are basically determined by the size and shape of the pigmented nanoparticles, crystal structure and chemical composition and adapted to the conditions of use for wood coatings systems.
Učinkovita izraba lastnosti pigmentiranega nanokristaliničnega titanovega (IV) oksida v kristalni strukturi rutil je mogoča zaradi prilagojenih pogojev površinske obdelave pigmentiranih nanodelcev z nanosom površinsko aktivnih substanc ter načina in pogojev dispergiranja površinsko aktivnih substanc v stabilne in transparentne disperzije.The efficient utilization of the properties of pigmented nanocrystalline titanium (IV) oxide in the crystalline structure of rutile is possible due to the adapted surface treatment conditions of the pigmented nanoparticles with the application of surfactants and the mode and conditions of dispersing the surfactants in stable and transparent dispersions.
Po standardni patentni klasifikaciji sodi izum v 01. razred - kemični proizvodi za industrijo in znanost.According to the standard patent classification, the invention belongs to the 1st class - chemical products for industry and science.
Tehnični problem, ki ga omenjeni izum rešuje, je sinteza disperzij na osnovi pigmentiranega nanokristaliničnega titanovega (IV) oksida v kristalnih rutil, ki vključuje postopke hidrolize komercialno dostopne 12 % - 15 % raztopine titanilovega sulfata (TiOSO4), z gostoto 1,4 g/ml in pH vrednostjo < 1, obarjanja netopnega hidratiziranega titanovega dioksida (TiO2’xH2O’ySO3) z dialkilamidnim obaijalnim reagentom v koncentracijskem območju od 1,0 mol/1 do 3,0 mol/1, pigmentacijo oboijenih nanodelcev hidratiziranega titanovega dioksida z vodno raztopino pigmenta (ZnFe2O4) spinelne kristalne strukture,, sedimentacijo oboijenih pigmentiranih hidratiziranih nanodelcev z dodatkom vodne raztopine anionskega poliakrilamidnega flokulacij skega sredstva v koncentracijskem območju med 0,01 ut.% in 0,5 ut.%, ter procesnih parametrov obaijanja (pHvrednost, temperatura in čas obaijanja), visoko temperaturne termične obdelave pigmentiranih nanodelcev hidratiziranega titanovega (IV) oksida v zračni atmosferi v temperaturnem območju med 500 °C in 1000 °C ter zadrževalnim časom od 1 ure do 3 ur pri maksimalni temperaturi, dvostopenjskega visoko energetskega mletja v horizontalnem atritorskem cirkonijevem mlinu s fazo dezintegracije termično obdelanih pigmentiranih nano delcev titanovega (IV) oksida v kristalni obliki rutil v območju od 1 do 20 ur pri pH vrednosti v območju med 6,0 in 11,5 s cirkonijevimi krogelnimi mlevnimi telesi dimenzije v območju Φ = 2 mm do 6 mm, ter fazo površinske obdelave pigmentiranih nano delcev titanovega (IV) oksida v kristalni obliki rutil z organskimi površinskimi snovmi v razmeiju suha snov/organska komponenta 1: 1,5-5 v visokoenergetskem atritorskem cirkonijevem mlinu s cirkonijevimi krogelnimi mlevnimi telesi dimenzije v območju Φ = 0,2 mm do 2 mm, časa homogenizacije v območju med 0,5 ure do 4 ure, pri pH vrednosti v območju od 5 do 9, ki zagotavljajo stabilnost in transparentnost končnega disperzij skega sistema v območju pH vrednosti med 5 in 9 in zeta potencialom manjšim od - 30 eV.A technical problem solved by the present invention is the synthesis of dispersions based on pigmented nanocrystalline titanium (IV) oxide in crystalline rutile, which includes the hydrolysis processes of a commercially available 12% - 15% solution of titanyl sulfate (TiOSO 4 ), with a density of 1.4 g / ml and pH value <1, precipitation of insoluble hydrated titanium dioxide (TiO2'xH 2 O'ySO3) with dialkylamide oblique reagent in a concentration range from 1.0 mol / 1 to 3.0 mol / 1, pigmentation of colored hydrated titanium dioxide nanoparticles with an aqueous solution of pigment (ZnFe2O 4 ) spinel crystal structure, sedimentation of colored pigmented hydrated nanoparticles with the addition of an aqueous solution of anionic polyacrylamide flocculation agent in a concentration range between 0.01% and 0.5% by weight, and the process parameters of both ( pH value, temperature and time of curing), high temperature thermal treatment of pigmented titanium (IV) oxide nanoparticles in an atmospheric atmosphere in the temperature range between 500 ° C and 1000 ° C and a holding time of 1 hour to 3 hours at maximum temperature, two-stage high-energy grinding in a horizontal zirconia mill with the disintegration phase of thermally treated pigmented titanium (IV) oxide nanoparticles in crystalline rutile in the range of 1 to 20 hours at a pH in the range of 6.0 to 11.5 with zirconium ball mills with dimensions in the range of Φ = 2 mm to 6 mm, and the surface treatment of pigmented titanium (IV) nano particles crystalline oxide of rutile with organic surfactants in the dry matter / organic component ratio 1: 1.5-5 in a high-energy zirconia grinder with zirconia ball mills with dimensions in the range Φ = 0.2 mm to 2 mm, homogenization time in the range between 0.5 hours and 4 hours, at pH values in the range of 5 to 9, which ensure the stability and transparency of the final dispersion system in the range having a pH value between 5 and 9 and a zeta potential of less than - 30 eV.
Način in pogoji priprave pigmentiranega nanokristaliničnega titanovega (IV) oksida v kristalni obliki rutil v veliki meri določajo končne uporabne lastnosti, ki so odvisne od oblike in velikosti, kristalne strukture in kemijske sestave. Razvoj na področju sinteze pigmentiranega nanokristaliničnega titanovega (IV) oksida, se usmeija v tehnologije priprave sferičnih nanodelcev z visoko specifično površino in ozko porazdelitvijo velikosti.The method and conditions of preparation of pigmented nanocrystalline titanium (IV) oxide in the crystalline form of rutile largely determine the end-use properties, which depend on the shape and size, crystalline structure and chemical composition. Developments in the synthesis of pigmented nanocrystalline titanium (IV) oxide are being mooted into technologies for the preparation of spherical nanoparticles with a highly specific surface area and a narrow size distribution.
Po doslej znanih literaturnih podatkih, poteka priprava titanovega (IV) oksida v svetu v dveh glavnih komercialnih oblikah. Starejša in količinsko bistvena je proizvodnja mikronskega pigmenta, medtem ko je proizvodnja ultrafinega oziroma nano pigmenta predmet intenzivnih razvojnih raziskav.According to the literature available to date, the preparation of titanium (IV) oxide is underway in two major commercial forms. The production of micron pigment is of older and quantitative importance, while the production of ultrafine or nano pigment is the subject of intensive developmental research.
Priprava mikronskega pigmentnega titanovega (IV) oksida v kristalni obliki rutil, poteka po komercialno najbolj uveljavljenem sulfatnem in kloridnem postopku. Sulfatni postopek priprave titanovega (IV) oksida se prične z razklopom rud, obogatenih s titanom, z žvepleno (VI) kislino. Nastane titanilov sulfat (TiOSO4), ki se večstopenjsko čisti in hidrolizira, da se dobi hidratiziran gel, ki se mu pred fazo kalcinacije dodajo ustrezne snovi za usmeijeno rast kristalov v želeno kristalno obliko (anatas, rutil). Sledi postopek površinske obdelave primarnih delcev titanovega (IV) oksida, da se izboljšajo končne pigmentne lastnosti.The preparation of micron pigment titanium (IV) oxide in the crystalline form of rutile is carried out by the most commercially available sulfate and chloride process. The sulfate process for the preparation of titanium (IV) oxide begins with the decomposition of titanium-enriched ores with sulfuric acid. Titanyl sulphate (TiOSO 4 ) is formed, which is purified and hydrolyzed in several stages to give a hydrated gel, which is added to the crystalline form (anatas, rutile) by suitable crystalline substances prior to the calcination phase. The process of surface treatment of primary titanium (IV) oxide particles is followed to improve the final pigment properties.
Kloridni postopek, ki je novejši in zahtevnejši od sulfatnega, temelji na kloriranju ustreznih, s titanom obogatenih surovin, v temperaturnem območju med 700 °C in 1200 °C. Nastane titanov tetraklorid (TiCl4), ki ga po fazi čiščenja z neposredno oksidacijo v temperaturnem območju med 900 °C in 1400 °C v kisikovi atmosferiThe chloride process, which is newer and more demanding than sulfate, is based on the chlorination of suitable titanium-enriched raw materials in the temperature range between 700 ° C and 1200 ° C. Titanium tetrachloride (TiCl 4 ) is formed, which is purified by direct oxidation in the temperature range between 900 ° C and 1400 ° C in an oxygen atmosphere after the purification phase.
ali s postopkom termične hidrolize, prevedejo v titanov (IV) oksid v kristalno strukturo rutil.or by thermal hydrolysis process, they are converted into titanium (IV) oxide into the crystalline structure of rutile.
Skupno obema postopkoma je nastanek odpadnih stranskih produktov, kar zahteva ustrezno deponiranje, pojavljajo se problemi visokih temperatur, korozije in toksičnosti, zaradi česar sta lahko postopka tudi ekološko sporna in ne omogočata priprave titanovega (IV) oksida v obliki nanodelcev, zahtevane oblike, velikosti in porazdelitve velikosti.Common to both processes is the generation of waste by-products, which requires proper disposal, high temperature, corrosion and toxicity problems, which can also be environmentally controversial and do not allow the preparation of titanium (IV) oxide in the form of nanoparticles, the required shape, size, and size distributions.
V primeijavi z doslej znanimi postopki priprave disperzij na osnovi pigmentiranega nanokristaliničnega titanovega (IV) oksida v kristalni obliki rutil, se predmet izuma od njih razlikuje v postopku priprave pigmentiranih nanodelcev hidratiziranega titanovega dioksida (TiO2'xH2OySO3), visoko-temperaturni termični obdelavi pigmentiranega hidratiziranega titanovega (IV) oksida, načinu in pogojih homogeniziranja in mletja termično obdelanega pigmentiranega nanokristaliničnega titanovega (IV) oksida ter površinski obdelavi z različnimi anorganskimi in organskimi površinsko aktivnimi snovmi, ki vplivajo na končne fizikalno-kemijske lastnosti pigmentiranega nanokristaliničnega titanovega (IV) oksida v kristalni strukturi rutil, ter zagotavljajo stabilnost in transparentnost končnih disperznih za lesne premazne sisteme.In comparison with the known methods of preparing dispersions based on pigmented nanocrystalline titanium (IV) oxide in the crystalline form of rutile, the object of the invention differs from them in the process of preparing pigmented nanoparticles of hydrated titanium dioxide (TiO2'xH 2 OySO3), a high-temperature thermal treatment pigment of hydrated titanium (IV) oxide, method and conditions of homogenization and milling of thermally treated pigmented nanocrystalline titanium (IV) oxide and surface treatment with various inorganic and organic surfactants affecting the final physicochemical properties of pigmented nanocrystalline IV crystalline structure of rutile, and provide stability and transparency of the final dispersions for wood coating systems.
Izum se nanaša na uporabljene vhodne surovine in kemijske sestave, tehnologijo termične obdelave pigmentiranega hidratiziranega nano titanovega dioksida dvostopenjske obdelave termično obdelanega pigmentiranega nano titanovega (IV) oksida v kristalni obliki rutil, tehnologijo deaglomeriranja termično obdelanega nano titanovega (IV) oksida v kristalni obliki rutil v visoko energetskem horizontalnem kontinuirnem atritorskem mlinu z uporabo cirkonijevih krogelnih mlevnih teles ter tehnologijo površinske obdelave pigmentiranih nano delcev titanovega (IV) oksida v kristalni obliki rutil z različnimi organskimi površinsko aktivnimi snovmi, ki zagotavljajo stabilnost in transparentnost končnega disperzij skega sistema v območju pH vrednosti med 5 in 9 in zeta potencialom manjšim kot - 30 eV.The invention relates to the input materials and chemical compositions used, thermal treatment technology of pigmented hydrated nano titanium dioxide two-stage treatment of thermally treated pigmented nano titanium (IV) oxide in rutile crystalline form, deagglomeration technology of thermally treated nano titanium (IV) crystalline oxide high energy continuous continuous grinding mill using zirconium ball mills and surface treatment of pigmented titanium (IV) oxide in rutile crystalline form with various organic surfactants providing stability and transparency of the final dispersion system in the pH range between 5 and 9 and zeta potentials less than - 30 eV.
Po izumu je naloga rešena z izdelavo disperznij na osnovi pigmentiranega nanokristaliničnega titanovega (IV) oksida v kristalni obliki rutil, iz:According to the invention, the problem is solved by making dispersions based on pigmented nanocrystalline titanium (IV) oxide in the crystalline form of rutile from:
• 12 - 15 % raztopine titanilovega sulfata (TiOSCL), z gostoto 1,4 g/ml in pH vrednostjo < 1.• 12-15% titanium sulfate solution (TiOSCL), with a density of 1.4 g / ml and a pH value of <1.
• Vodne raztopine dialkilamida kot obaijalni reagent v koncentracijskem območju med 1,0 mol/1 in 3,0 mol/1.• Aqueous dialkylamide solutions as an abiotic reagent in a concentration range between 1.0 mol / l and 3.0 mol / l.
• Homogene vodne suspenzije pigmenta (ZnFe2O4) spinelne kristalne strukture v koncentracijskem območju med 1 ut% in 10 ut% • Vodne raztopine anionskega poliakrilamidnega flokulacijskega sredstva v koncentracijskem območju med 0,01 ut% in 0,5 ut%.• Homogeneous aqueous pigment suspensions (ZnFe2O4) of the spinel crystal structure in the concentration range between 1 wt% and 10 wt% • Aqueous solutions of the anionic polyacrylamide flocculation agent in the concentration range between 0.01 wt% and 0.5 wt%.
• Organske površinsko aktivnih snovi z eno ali več primernimi funkcionalnimi hidroksilnimi, karboksilnimi, amino in tiolnimi skupinami v koncentracijskem območju med 0,1 ut.% in 50 ut.% • Procesnih parametrov postopka obarjanja pigmentiranega hidratiziranega titanovega (IV) oksida v temperaturnem območju (100 ± 2) °C ter 3 do 7 ur zadrževanja na maksimalni temperaturi, termične obdelave pigmentiranega hidratiziranega titanovega (IV) oksida v temperaturnem območju med 500 °C in 1000 °C v zračni atmosferi ter 1 do 3 urnem zadrževanjem na maksimalni temperaturi, dvostopenjskega visoko energetskega mletja v horizontalnem atritorskem cirkonijevem mlinu s fazo dezintegracije • · ·• Organic surfactants with one or more suitable functional hydroxyl, carboxyl, amino and thiol groups in a concentration range between 0.1 wt.% And 50 wt.% • Process parameters of the pigmented hydrated titanium (IV) oxide precipitation process in the temperature range ( 100 ± 2) ° C and 3 to 7 hours of maximum temperature holding, thermal treatment of pigmented hydrated titanium (IV) oxide in the temperature range between 500 ° C and 1000 ° C in the air atmosphere, and 1 to 3 hours of maximum temperature, two-stage of high-energy grinding in a horizontal zirconia grinder with a disintegration phase • · ·
termično obdelanih pigmentiranih nano delcev titanovega (IV) oksida v kristalni obliki rutil v območju od 1 do 20 ur pri pH vrednosti v območju med 6,0 in 11,5 s cirkonijevimi krogelnimi mlevnimi telesi dimenzije v območju Φ = 2 mm do 6 mm, ter fazo površinske obdelave pigmentiranih nano delcev titanovega (IV) oksida v kristalni obliki rutil z organskimi površinskimi snovmi v razmeiju suha snov/organska komponenta 1: 1,5-5 v visokoenergetskem atritorskem cirkonijevem mlinu s cirkonijevimi krogelnimi mlevnimi telesi dimenzije v območju Φ = 0,2 mm do 2 mm, časa homogenizacije v območju med 0,5 ure do 4 ure, pri pH vrednosti v območju od 5 do 9.thermally treated pigmented nano-particles of titanium (IV) oxide in rutile crystalline form in the range of 1 to 20 hours at a pH in the range of 6.0 to 11.5 with zirconium ball milling bodies in the range Φ = 2 mm to 6 mm, and the surface treatment phase of pigmented titanium (IV) oxide crystals in rutile crystalline form with organic surfactants in a dry matter / organic component ratio of 1: 1.5-5 in a high-energy zirconium grinding mill with zirconium ball milling bodies with dimensions in the range Φ = 0 , 2 mm to 2 mm, homogenization time in the range of 0.5 hours to 4 hours, at pH values in the range of 5 to 9.
Natančna razmeija posameznih komponent ter pripadajoči procesni parametri sinteze so navedeni v izvedbenem primeru.The exact delineations of the individual components and the corresponding process parameters of the synthesis are given in the embodiment.
IZVEDBENI PRIMEREXECUTIVE EXAMPLE
V reakcijsko posodo, opremljeno z mešalom, odmerimo 450 ml 10 - 12 % raztopine titanilovega sulfata (TiOSO4), z gostoto 1,4 g/ml in pH vrednostjo < 1, 450 ml destilirane vode ter 2250 ml 2,4 molarne vodne raztopine obaijalnega reagenta dialkilamida. Sinteza poteka 5 ur pri konstantni temperaturi (100 ± 2) °C in hitrosti mešanja 150 vrt./minuto. Po zaključku sinteze dodamo 7% vodne raztopine pigmenta (ZnFe2O4) spinelne kristalne strukture, pri hitrosti mešanja 150 vrt./minuto. Oboijene pigmentirane delce hidratiziranega titanovega (IV) oksida (TiO2xH2OySO3) sedimentiramo z dodatkom 0,4g 0,33 % vodne raztopine anionskega poliakriamidnega flokulanta in filtrat ločimo z dekantiranjem. Sediment pigmentiranih nanodelcev hidratiziranega titanovega (IV) oksida, ki vsebuje cca 15% vlage termično obdelamo pri temperaturi 900 °C v zračni atmosferi z zadrževalnim časom 2 uri na maksimalni temperaturi, da se formira kristalna oblika rutil.Pour 450 ml of 10-12% titanium sulphate solution (TiOSO 4 ), with a density of 1.4 g / ml and a pH value <1, 450 ml of distilled water and 2250 ml of 2.4 molar aqueous solution into the reaction vessel equipped with the agitator. of the dialkylamide oblique reagent. The synthesis is carried out for 5 hours at a constant temperature (100 ± 2) ° C and a stirring speed of 150 rpm. Upon completion of the synthesis, 7% aqueous pigment solution (ZnFe 2 O 4 ) of the spinel crystal structure was added at a stirring speed of 150 rpm. The colored pigmented particles of hydrated titanium (IV) oxide (TiO 2 xH 2 OySO 3 ) were sedimented with the addition of 0.4g 0.33% aqueous anionic polyacriamide flocculant and the filtrate was separated by decantation. Sediment of pigmented hydrated titanium (IV) oxide nanoparticles containing approximately 15% moisture is thermally treated at 900 ° C in an air atmosphere with a holding time of 2 hours at maximum temperature to form the crystalline form of rutile.
Termično obdelane pigmentirane nanodelce titanovega (IV) oksida v kristalni obliki rutil v prvi fazi deaglomeriramo v visokoenergetskem horizontalnem kontinuirnem atritorskem mlevnem agregatu z uporabo cirkonijevih krogelnih mlevnih teles velikosti Φ = 2 mm, 150 minut pri sledečem mlevskem razmerju: 1 masni delež pigmentiranih nanodelcev titanovega (IV) dioksida v kristalni strukturi rutil, 2,33 masnega deleža destilirane vode z dodatkom amoniaka (pH = 11 ±0,5) ter 6,45 masnega deleža cirkonijevih krogelnih mlevnih teles dimenzije Φ = 2 mm. V fazo deaglomeracije dodamo površinsko aktivne organske komponente: 15 ut.% propilenglikola (računano na masni delež nano delcev pigmentiranega titanovega (IV) oksida), 10 ut.% dispergirnega sredstva polidimetilsiloksana modificiranega s polietrom ter 1 ut.% antipenilca polisiloksana s hidrofobnimi delci v poliglikolu (računano na masni delež nano delcev pigmentiranega titanovega (IV) oksida). Med fazo deaglomeracije vzdržujemo pH vrednost med 8 in 9 (alkalimo z NH4OH). Po zaključku faze deaglomeracije zamenjamo cirkonijeva krogelna mlevna telesa Φ = 2 mm z cirkonijevimi krogelnimi mlevnimi telesi Φ = 0,5mm in meljemo 120 minut do končne stabilne in transparentne pigmentirane disperzije nano titanovega (IV) oksida v kristalni obliki rutil.The thermally treated pigmented titanium (IV) oxide nanoparticles in the crystalline rutile form in the first stage are deagglomerated in a high-energy horizontal continuous attractor grinding unit using zirconium spherical grinding bodies of size 2 = 2 mm for 150 minutes at the following grinding ratio: 1 mass fraction of pigmented titanium nanoparticles IV) dioxide in the crystalline structure of rutile, 2.33% by weight of distilled water with the addition of ammonia (pH = 11 ± 0.5) and 6.45% by weight of zirconium ball milling bodies of dimension Φ = 2 mm. To the deagglomeration phase, surfactant organic components are added: 15% by weight of propylene glycol (calculated on the mass fraction of nano particles of pigmented titanium (IV) oxide), 10% by weight of a polyether dimethylsiloxane modified dispersant, and 1% by weight of polysiloxane antifoam with hydrophobic deletions polyglycol (calculated on the mass fraction of nano particles of pigmented titanium (IV) oxide). During the deagglomeration phase, a pH between 8 and 9 is maintained (alkalized with NH4OH). After the deagglomeration phase is completed, the zirconium ball mills Φ = 2 mm are replaced with the zirconia ball mills Φ = 0.5mm and milled for 120 minutes to a final stable and transparent pigmented dispersion of nano titanium (IV) oxide in crystalline rutile form.
Pigmentirane nanodelce titanovega (IV) oksida v kristalni obliki rutil karakteriziramo z rentgensko praškovno difrakcijo (XRD), določimo specifično površino in velikost delcev z metodo BET, pH vrednost in zeta potencial.Pigmented titanium (IV) oxide nanoparticles in rutile crystalline form are characterized by X-ray powder diffraction (XRD), specific surface area and particle size are determined using the BET method, pH value and zeta potential.
Po izumu je problem rešen z določitvijo fazne sestave z rentgensko praškovno difrakcijo (XRD), specifično površino delcev (ABET) in velikostjo delcev (DBet) z metodo BET, pH vrednostjo in zeta potencialom stabilne in transparentne disperzije pigmentiranega nano titanovega (IV) oksida v kristalni obliki rutil.According to the invention, the problem is solved by determining the phase composition by X-ray powder diffraction (XRD), specific particle surface (A BET ) and particle size (D B et) by the BET method, pH value and zeta potential of stable and transparent dispersion of pigmented nano titanium (IV ) of the oxide in the crystalline form of rutile.
Andrej ŽnidaršičAndrej Znidarsic
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