CN1405236A - Nano CaCo3/TiO2 composite particle and its preparation method - Google Patents

Nano CaCo3/TiO2 composite particle and its preparation method Download PDF

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CN1405236A
CN1405236A CN02135086.8A CN02135086A CN1405236A CN 1405236 A CN1405236 A CN 1405236A CN 02135086 A CN02135086 A CN 02135086A CN 1405236 A CN1405236 A CN 1405236A
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tio
composite particles
nanometer caco
caco
particle
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CN1239635C (en
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曾汉民
刘国军
胡傲
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Sun Yat Sen University
National Sun Yat Sen University
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National Sun Yat Sen University
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Abstract

The invention refers to a kind of nano CaCO3/TiO2 compound particles and the manufacturing method. It is nano compound particles with core and shell structure formed by covering a layer of TiO2 on the surface of nano CaCO3 particles. The manufacturing method is: at first, Ti(OH)4 gum solvent with excellent dispersant is produced, then the gum solvent is added into nano CaCO3 suspension which uses dude-alkyl natrium benezene sulfonic acid as dispersant; it destroys the stability of Ti(OH)4 gum particles by changing the temperature and pH value of the systme, then the Ti(OH)4 gum particles deposits on the surface of nano CaCO3, thus the nano CaCO3/TiO2 compound particles with core and shell structure come into being.

Description

Nanometer CaCO 3/ TiO 2Composite particles and preparation method thereof
Technical field
The present invention relates to a kind of nanometer CaCO with nucleocapsid structure 3/ TiO 2Composite particles and preparation method thereof.
Background technology
CaCO 3Be usually used in as weighting agent in the industry such as coating, rubber, plastics and papermaking, its purpose mainly is to reduce the cost of material.The development of nanosecond science and technology makes nano level CaCO 3The a large amount of appearance, and the continuous progress of nanometer composite technology makes nanometer CaCO 3Being used for traditional industries such as plastics, rubber becomes possibility, and it acts on except that reducing cost, and bibliographical information nanometer CaCO is also arranged 3Also can play and strengthen toughness reinforcing effect.Nanometer CaCO 3Be used for coatings industry as loading pigment,, the bigger zinc sulfide white of density in the system had living space steric effect and plays the anti-settling effect though have exquisiteness, even, high, the good in optical property of whiteness; The paint film whiteness increases in system lacquer back, the gloss height, and opacifying power such as does not but reduce at advantage, but studies carefully its essential nanometer CaCO 3Still use as inert pigment.How at CaCO 3On the basis of nanoscale super-refinement advantage, also have some function when reducing cost, then not only can widen nanometer CaCO 3The application space, and when substituting the higher auxiliary agents such as titanium dioxide, silicon-dioxide and iron oxide red of price, material property is not reduced as pigment.
In the at present relevant Research on Surface Modification of inorganic powder material (comprising nano material), mainly based on organic coating modification research, comprise tensio-active agent processings, coupling agent technology, plasma technique, radiation grafting technology, introduce azo, peroxide, mistake ester etc. by esterification, hydroxylating at powder surface and have the free yl graft polymerization modification technology of functional group of trigger monomer polymerization and redox technology etc.; The inorganic powder material especially inorganic coating modification research on nano-powder material surface is then less relatively, and is mostly with TiO 2The inorganic coating modification research of particle surface is main, for example at nano-TiO 2Particle surface coated Si O 2
With nano-TiO 2Compare nanometer CaCO on the market 3Selling price want considerably cheaper.At nanometer CaCO 3Particle surface coats one deck TiO 2Thereby prepare nanometer CaCO with nucleocapsid structure 3/ TiO 2Composite particles not only can improve nanometer CaCO 3Surface properties, give nanometer CaCO 3New function is widened nanometer CaCO 3The application space, and with nanometer CaCO 3/ TiO 2Composite particles replaces nano-TiO wholly or in part 2Be applied to industries such as coating, plastics, rubber and pottery, electronics, catalysis, can also significantly reduce the cost of material, increase economic efficiency.In addition, at nanometer CaCO 3Particle surface coats one deck TiO 2Can also improve its surfactivity, increase the active reaction point of organic modification, improve nanometer CaCO 3The effect of particle surface organic hybrid modification.At present relevant nanometer CaCO 3The inorganic coating modification research on surface is also at the experimental stage, and nanometer CaCO 3The surface coats TiO 2Research also do not have bibliographical information.
Summary of the invention
The purpose of this invention is to provide a kind of nanometer CaCO with nucleocapsid structure 3/ TiO 2Composite particles and preparation method thereof.To solve the existing the problems referred to above of prior art.
Nanometer CaCO of the present invention 3/ TiO 2Composite particles is at nanometer CaCO 3Particle surface coats one deck TiO 2And the nano-complex particle with nucleocapsid structure that constitutes; This particle is based on spherical or subsphaeroidal, and median size is 50～80nm.
This nanometer CaCO 3/ TiO 2TiO in the composite particles 2Mass ratio be generally 2%～25%.The TiO of surface coating layer in this composite particles 2Grain size is mainly 5～8nm.
Nanometer CaCO of the present invention 3/ TiO 2The preparation method of composite particles comprises Ti (OH) 4The preparation of colloidal solution and have the nanometer CaCO of nucleocapsid structure 3/ TiO 2Two step of the preparation process of composite particles.At first prepare Ti (OH) with good distribution performance 4Colloidal solution, colloidal solution being joined with the Sodium dodecylbenzene sulfonate then is the nanometer CaCO of dispersion agent 3In the waterborne suspension; Parameter destruction Ti (OH) such as the temperature by changing system, pH value 4The stability of colloidal particle, thus Ti (OH) caused 4Colloidal particle is deposited on nanometer CaCO 3The surface forms the nanometer CaCO with nucleocapsid structure 3/ TiO 2Composite particles, nanometer CaCO in the deposition process 3Play the nucleator effect.By regulating Ti (OH) 4The concentration of colloidal particle, volume and nanometer CaCO 3The concentration of waterborne suspension, may command composite particles mesexine TiO 2Mass ratio in 2%～25% scope.Concrete technology is as follows:
(1) drip strong aqua in the titanium sulfate solution of 0.05mol/L～0.45mol/L, the pH value of regulation system is 6～9; Filter and with deionized water wash sulphate-containing ion not to the system; Filter cake is scattered in obtains Ti (OH) in the deionized water 4Colloidal solution, colloidal concentration are 0.05mol/L～0.45mol/L.
(2) with the Ti (OH) of gained in the step (1) 4Colloidal solution joins mass concentration under 2000 commentaries on classics/min～4000 commentaries on classics/min agitation conditions be 1%～20% nanometer CaCO 3In the slurries, behind the ultra-sonic dispersion 30min, heating and adding CaCO in 40～90 ℃ of water-baths 3The Sodium dodecylbenzene sulfonate of quality 0.05%～0.2%, the pH value with the NaOH solution regulation system of 0.5mol/L～4.5mol/L is 7.5～13 then, ageing 2 hours; Product after filtration, washing, 120 ℃ of drying treatment promptly obtain having the nanometer CaCO of nucleocapsid structure 3/ TiO 2Composite particles.
The nanometer CaCO that the present invention is prepared 3/ TiO 2Composite particles shows that through TG, SEM, XPS and X-ray diffraction analysis composite particles is of a size of nanometer scale, and homogeneous grain diameter is based on spherical or subsphaeroidal; And thereby coated by titanium dioxide forms inorganic coating layer and has nucleocapsid structure on nano-sized carbon calcium particle surface, and shell TiO 2The size of particle is mainly 5～8nm.
The present invention adopts the titanium source of titanium sulfate aqueous solution as the modification of nano-calcium carbonate surface inorganic, with the dispersion agent of Sodium dodecylbenzene sulfonate as the nano-calcium carbonate dispersion system, both can guarantee Nano particles of calcium carbonate dispersive stability and homogeneity, the introducing that can avoid organic solvent again is to pollution that environment caused.Nano particles of calcium carbonate surface cladding titanium dioxide not only can improve nanometer CaCO 3Surface properties, make particle surface contain the higher titanium alcohol radical functional group of a large amount of reactive behavioies, for the organic active modification lays the foundation, also can partially or completely replace nano-TiO 2Be applied to industries such as coating, plastics, rubber and pottery, electronics, catalysis, reduce the cost of material, increase economic efficiency.
The invention will be further described below by way of embodiments and drawings.
Description of drawings
Fig. 1 is pure nanometer CaCO 3The SEM photo;
Fig. 2 is Ti (OH) 4The SEM photo:
Fig. 3 is nanometer CaCO 3/ TiO 2(TiO 2Wt% is 6.8) the SEM photo of composite particles;
Fig. 4 is nanometer CaCO 3XPS spectrum before and after coating, wherein curve 1 is pure nanometer CaCO 3, curve 2 is nanometer CaCO 3/ TiO 2Composite particles;
Fig. 5 is nanometer CaCO 3/ TiO 2(TiO 2Wt% is 9.8) the SEM photo of composite particles;
Fig. 6 is nanometer CaCO 3/ TiO 2(TiO 2Wt% is 13.6) the SEM photo of composite particles.
Embodiment
Embodiment 1
Drip strong aqua in the titanium sulfate solution of 0.1mol/L, the pH value of regulation system is 6; Filter and wash to the system not sulphate-containing ion; Filter cake is scattered in obtains Ti (OH) in the deionized water 4Colloidal solution, colloidal concentration are 0.1mol/L.Under 2000 commentaries on classics/min～4000 commentaries on classics/min agitation conditions colloidal solution joined mass concentration and is 20% nanometer CaCO 3In the slurries, behind the ultra-sonic dispersion 30min, heating and adding CaCO in 40 ℃ of water-baths 3The Sodium dodecylbenzene sulfonate of quality 0.2%, the pH value with the NaOH solution regulation system of 4.5mol/L is 13 then.Ageing 2 hours, product are after filtration, washing, 120C drying treatment promptly obtain nanometer CaCO 3/ TiO 2Composite particles.Its size, composition, structure and performance characterization are as follows:
The size of composite particles and surface topography:
From accompanying drawing 1 pure nanometer CaCO 3The electromicroscopic photograph of particle as can be seen, unmodified nanometer CaCO 3The shape of particle is based on cubes, and size is 40～60nm, and smooth surface is evenly distributed.Ti in the accompanying drawing 2 (OH) 4The median size of colloidal particle is 5～8nm, is evenly distributed, and does not have obvious agglomeration.Accompanying drawing 3 nanometer CaCO of the present invention 3/ TiO 2In the electromicroscopic photograph of composite particles, nanometer CaCO 3The size of particle does not have considerable change, and shape is based on circle or subcircular, the unmodified nanometer CaCO of surface ratio 3Particle is coarse, exists particle diameter a large amount of, that arrange densification to be about the particulate of 5～8nm, is strawberry crust shape.The shape of these particulates and size and Ti (OH) 4Colloidal particle are quite similar, and TiO is described 2Be coated on nanometer CaCO 3The surface of particle.
The surface composition of composite particles and structure:
To pure nanometer CaCO 3With nanometer CaCO 3/ TiO 2Composite particles is made XPS surface analysis of components, the results are shown in accompanying drawing 4. as can be seen, pure nanometer CaCO 3Have only C peak, O peak and Ca peak, and nanometer CaCO 3/ TiO 2Composite particles the Ti peak also occurred near 458eV except C peak, O peak and Ca peak are arranged.XPS surface atom composition quantitative analysis results shows nanometer CaCO 3/ TiO 2The mol ratio of element ti/Ca is 0.41 in the complex body, and the Ti/Ca mol ratio that Theoretical Calculation and TG analyze is 0.09, and 0.41 much smaller than XPS analysis illustrates the nanometer CaCO that the present invention is prepared 3/ TiO 2TiO in the composite particles 2Be not simply with physical blending mode and nanometer CaCO 3Coexistence, but be coated on nanometer CaCO 3The surface forms the composite particles with nucleocapsid structure.This composite particles mesexine TiO 2Mass ratio be 6.8%.
The thing phase composite of composite particles:
To pure nanometer CaCO 3, nanometer CaCO 3/ TiO 2Composite particles, by Ti (OH) 4Colloid is respectively through 120 ℃ of dryings, 600 ℃ of TiO that calcination processing obtains 2, and nanometer CaCO 3/ TiO 2Composite particles etches away CaCO with dilute hydrochloric acid 3After more respectively through 120 ℃ of dryings, 600 ℃ of TiO that calcination processing obtains 2Make X-ray diffraction (XRD) analysis revealed, pure nanometer CaCO 3With nanometer CaCO 3/ TiO 2CaCO in the composite particles 3The peak position of its XRD diffraction peak and d value match with Mineral Powder Diffraction file Data Book ICDD No.5-586, are isometric system calcite crystal formations.By Ti (OH) 4The TiO that colloid obtains through 120 ℃ of drying treatment 2There is not diffraction peak to occur, and nanometer CaCO 3/ TiO 2Composite particles etches away CaCO with dilute hydrochloric acid 3After the TiO that obtains through 120 ℃ of drying treatment again 2The anatase titanium dioxide diffraction peak then appears.
Calculate nanometer CaCO with the Scherrer formula 3, CaCO 3/ TiO 2CaCO in the composite particles 3, and by Ti (OH) 4Colloid is through 600 ℃ of calcinings and nanometer CaCO 3/ TiO 2Composite particles etches away CaCO with dilute hydrochloric acid 3After the TiO that obtains through 600 ℃ of calcination processing again 2Average crystal grain be respectively 42.52nm, 42.53nm, 16.77nm, 8.21nm.As seen nanometer CaCO 3/ TiO 2CaCO in the composite particles 3Median size and pure nanometer CaCO 3Very close, show that the coating process is to nanometer CaCO 3Not influence of particle diameter; And by nanometer CaCO 3/ TiO 2Composite particles etches away CaCO with dilute hydrochloric acid 3After the TiO that obtains through 600 ℃ of calcination processing again 2Average crystal grain than by Ti (OH) 4The TiO that colloid obtains through 600 ℃ of calcination processing 2Average crystal grain little about 1 times, show at preparation nanometer CaCO 3/ TiO 2In the process of composite particles, nanometer CaCO 3Played the effect of nucleator, Ti (OH) 4Micelle is deposited on nanometer CaCO earlier 3The surface of particle is gelation and crystallization again.
Embodiment 2
Drip strong aqua in the titanium sulfate solution of 0.2mol/L, the pH value of regulation system is 7.5; Filter and wash to the system not sulphate-containing ion; Filter cake is scattered in obtains Ti (OH) in the deionized water 4Colloidal solution, colloidal concentration are 0.2mol/L.Under 2000 commentaries on classics/min～4000 commentaries on classics/min agitation conditions colloidal solution joined mass concentration and is 10% nanometer CaCO 3In the slurries, behind the ultra-sonic dispersion 30min, heating and adding CaCO in 70 ℃ of water-baths 3The Sodium dodecylbenzene sulfonate of quality 0.1%, the pH value with the NaOH solution regulation system of 2.5mol/L is 10 then.Ageing 2 hours, product are after filtration, washing, 120 ℃ of drying treatment promptly obtain nanometer CaCO 3/ TiO 2Composite particles.Its size and surface topography are seen shown in Figure 5.As can be seen, the shape of Nano particles of calcium carbonate takes place obviously to change before and after coating, and coats the back particle surface and becomes coarse, exists and arranges the particulate that fine and close particle diameter is about 5～8nm.This composite particles mesexine TiO 2Mass ratio be 9.8%.
Embodiment 3
Drip strong aqua in the titanium sulfate solution of 0.4mol/L, the pH value of regulation system is 9; Filter and wash to the system not sulphate-containing ion; Filter cake is scattered in obtains Ti (OH) in the deionized water 4Colloidal solution, colloidal concentration are 0.4mol/L.Under 2000 commentaries on classics/min～4000 commentaries on classics/min agitation conditions colloidal solution joined mass concentration and is 5% nanometer CaCO 3In the slurries, behind the ultra-sonic dispersion 30min, heating and adding CaCO in 90 ℃ of water-baths 3The Sodium dodecylbenzene sulfonate of quality 0.05%, the pH value with the NaOH solution regulation system of 0.5mol/L is 8 then.Ageing 2 hours, product are after filtration, washing, 120 ℃ of drying treatment promptly obtain nanometer CaCO 3/ TiO 2Composite particles.Its size and surface topography are seen shown in Figure 6.Nanometer CaCO 3The size variation of particle is not obvious, and shape is based on circle or subcircular, the unmodified nanometer CaCO of surface ratio 3Particle is coarse, exists particle diameter a large amount of, that arrange densification to be about the particulate of 5～8nm, is strawberry crust shape.This composite particles mesexine TiO 2Mass ratio be 13.6%.

Claims (4)

1. nanometer CaCO 3/ TiO 2Composite particles is characterized in that this particle is at nanometer CaCO 3Particle surface coats one deck TiO 2And the nano-complex particle with nucleocapsid structure that constitutes: this particle is based on spherical or subsphaeroidal, and median size is 50～80nm.
2. according to the described composite particles of claim 1, it is characterized in that TiO in this composite particles 2Mass ratio be 2%～25%.
3. according to claim 1 or 2 described composite particless, it is characterized in that the TiO of surface coating layer in this composite particles 2Grain size is mainly 5～8nm.
4. the described nanometer CaCO of claim 1 3/ TiO 2The preparation method of composite particles is characterized in that: drip strong aqua in the titanium sulfate solution of 0.05mol/L～0.45mol/L, the pH value of regulation system is 6～9; Filter and with deionized water wash sulphate-containing ion not to the system; Filter cake is scattered in obtains Ti (OH) in the deionized water 4Colloidal solution, colloidal concentration are 0.05mol/L～0.45mol/L; Under 2000 commentaries on classics/min～4000 commentaries on classics/min agitation conditions colloidal solution joined mass concentration and is 1%～20% nanometer CaCO 3In the slurries, behind the ultra-sonic dispersion 30min, heating and adding CaCO in 40～90 ℃ of water-baths 3The Sodium dodecylbenzene sulfonate of quality 0.05%～0.2%, the pH value with the NaOH solution regulation system of 0.5mol/L～4.5mol/L is 7.5～13 then; Ageing 2 hours; Product after filtration, deionized water wash, 120 ℃ of drying treatment promptly obtain the required nanometer CaCO with nucleocapsid structure 3/ TiO 2Composite particles.
CN02135086.8A 2002-11-06 2002-11-06 Nano CaCo3/TiO2 composite particle and its preparation method Expired - Fee Related CN1239635C (en)

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CN1297518C (en) * 2003-10-09 2007-01-31 商静一 Nano foam sound absorption material
CZ300735B6 (en) * 2007-12-11 2009-07-29 Advanced Materials - Jtj, S. R. O. Multifunctional coat of paint with photocatalytic and sanitary effect and process for preparing thereof
CZ303366B6 (en) * 2011-06-30 2012-08-15 Advanced Materials-Jtj, S.R.O. Composition with extremely photocatalytic and sanitary effect for surface treatment
CN102634240A (en) * 2012-04-28 2012-08-15 安徽江东科技粉业有限公司 Preparation method of calcium carbonate based reinforcing agent for PVC (polyvinyl chloride) advertising film
CN102733255A (en) * 2011-04-07 2012-10-17 南京林业大学 Surface modification method of titanium dioxide-PCC mixed filling material
CN103450713A (en) * 2013-08-22 2013-12-18 丹东亿龙高科技材料有限公司 Chlorite-based composite titanium dioxide powder and preparation method thereof
CN104387807A (en) * 2014-10-31 2015-03-04 天津市欣德泰铁粉有限公司 Preparation method of composite titanium dioxide
CN106380082A (en) * 2016-08-22 2017-02-08 孟玲 An antifog coating based on a core-shell structure
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CN112876878A (en) * 2021-01-26 2021-06-01 江西势通钙业有限公司 Ultrahigh-whiteness pigment-grade core-shell structure type nano calcium carbonate and preparation method thereof
CN115109437A (en) * 2022-07-12 2022-09-27 龙佰禄丰钛业有限公司 Preparation method of composite titanium dioxide
CN115260850A (en) * 2022-06-30 2022-11-01 湖南景呈包装有限公司 Wear-resistant anti-slip carton glazing oil and preparation method and application thereof

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1297518C (en) * 2003-10-09 2007-01-31 商静一 Nano foam sound absorption material
US8647565B2 (en) 2007-12-11 2014-02-11 Advanced Materials—JTJ S.R.O. Multifunctional photocatalytic paint coat and method of preparation thereof
CZ300735B6 (en) * 2007-12-11 2009-07-29 Advanced Materials - Jtj, S. R. O. Multifunctional coat of paint with photocatalytic and sanitary effect and process for preparing thereof
CN102733255A (en) * 2011-04-07 2012-10-17 南京林业大学 Surface modification method of titanium dioxide-PCC mixed filling material
CZ303366B6 (en) * 2011-06-30 2012-08-15 Advanced Materials-Jtj, S.R.O. Composition with extremely photocatalytic and sanitary effect for surface treatment
CN102634240A (en) * 2012-04-28 2012-08-15 安徽江东科技粉业有限公司 Preparation method of calcium carbonate based reinforcing agent for PVC (polyvinyl chloride) advertising film
CN103450713A (en) * 2013-08-22 2013-12-18 丹东亿龙高科技材料有限公司 Chlorite-based composite titanium dioxide powder and preparation method thereof
CN104387807A (en) * 2014-10-31 2015-03-04 天津市欣德泰铁粉有限公司 Preparation method of composite titanium dioxide
CN106380082A (en) * 2016-08-22 2017-02-08 孟玲 An antifog coating based on a core-shell structure
CN106380082B (en) * 2016-08-22 2018-12-07 江苏晶联水漆有限公司 A kind of anti-fog coating based on core-shell structure
CN108084721A (en) * 2017-12-20 2018-05-29 山东星火科学技术研究院 A kind of road nano-compound modified asphalt material and preparation method thereof
CN112876878A (en) * 2021-01-26 2021-06-01 江西势通钙业有限公司 Ultrahigh-whiteness pigment-grade core-shell structure type nano calcium carbonate and preparation method thereof
CN115260850A (en) * 2022-06-30 2022-11-01 湖南景呈包装有限公司 Wear-resistant anti-slip carton glazing oil and preparation method and application thereof
CN115109437A (en) * 2022-07-12 2022-09-27 龙佰禄丰钛业有限公司 Preparation method of composite titanium dioxide

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