A study of structuring of a microdisperse filler in oligomer formulations in a flow

Tselishchev, Yu. G.; Вальцифер, В. А.; Стрельников, В. Н.

doi:10.1134/s1070427210080124

Russ J Appl Chem

2010

DOI: 10.1134/s1070427210080124

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A study of structuring of a microdisperse filler in oligomer formulations in a flow

Yu. G. Tselishchev

В. А. Вальцифер

В. Н. Стрельников

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2016

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“…21 shows that type of «contact» of particles has a significant effect on the magnitude of the capillary force. Its influence increases with increasing volume of «bridge».On the basis of the proposed models the rheological properties of organo-mineral nanodispersions and the possibility of obtaining on their basis the conductive polymer composites experimentally have been described and tested [162,163]. …”

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Nanocomposite organomineral hybrid materials. Part 3

Kudryavtsev¹,

Figovsky²

2016

Nanotehnol. stroit.

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PART III ExtEndEd AbstrAct:The paper addresses the issues of alkoxide method of sol-gel synthesis and non-hydrolytic method of sol-gel synthesis and colloidal method of sol-gel synthesis. The authors also consider an alternative approach based on the use of soluble silicates as precursors in the sol-gel technology, of nanocomposites. It was shown that nanocomposites can be produced through aerogels. The paper also analyzes the mixing technologies of nanocomposites preparation. It has been demonstrated the possibility to change the types of nano-phase which is used for obtaining nanocomposites in different approaches. Various models of packaging spherical, fibrous and layered nanoparticles, introduced into the structure of the nanocomposite, in the preparation thereof were examined.Key words: Nanocomposites, sol-gel synthesis, soluble silicates, metal alkoxide, sols, gels, aerogels, packing of spherical nanoparticles, packing of fibrous nanoparticles. THE RESULTS OF THE SPECIALISTS' AND SCIENTISTS' RESEARCHES MAchinE-rEAdAblE inforMAtion on cc-licEnsEs (htMl-codE) in MEtAdAtA of thE pApErThe first and the second parts of the paper are published in the issues 1/2016 and 2/2016. INFLUENCE OF VARIOUS FACTORS ON STRUCTURE AND PROPERTIES OF HYBRID MATERIALS Packing of spherical nanoparticles of the fillerThe system of pores in a solid is entirely determined by the nature of the packing of the primary particles. For example, when the hexagonal closest packing of spherical particles between disposed in a plane, the three nearest tetrahedral cavities is octahedral cavity. In subsequent accretions over the octahedral cavity occurs again octahedral cavity. Superimposed on top of each other octahedral cavities form channels that permeate the whole body of matter in the orthogonal directions [151]. In cubic structures of the closest packing may also indicate the formation of interconnected channels. In the package of this type the void volume is 25.95%. From here it is possible to calculate the bulk density of the material (ρ):, where: ρ k -crystallographic density of the material used as a basis. L -void fraction in the structure of the package. INTERNATIONAL EXPERIENCE 18http://nanobuild.ruIf the lightest of refractory materials has crystallographic density close to 3 g/cm 3 , the bulk density of the product with the densest packing is 2.2 g/cm 3 . From here, to obtain a materials with a bulk density less than 0.5 g/cm 3 , it is necessary to achieve a greater porosity of 83%.Let's try to analyze what kind of particle packing can achieve the desired porosity.Typically with decrease in the coordination of number of particles packed in the packaging structures of particles increases the pore volume. In the case of the densest packings, the coordination number of the package is 12. Consider the following options for the coordination numbers of the package. Classically, such a packing density was 74%, respectively; the porosity of such package is 26%. For monodisperse materials denser packaging does not happen.The coordination...

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confidence: 99%

“…On the basis of the proposed models the rheological properties of organo-mineral nanodispersions and the possibility of obtaining on their basis the conductive polymer composites experimentally have been described and tested [162,163].…”

mentioning

confidence: 99%

Nanocomposite organomineral hybrid materials. Part 3

Kudryavtsev¹,

Figovsky²

2016

Nanotehnol. stroit.

View full text Add to dashboard Cite

show abstract

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A study of structuring of a microdisperse filler in oligomer formulations in a flow

Cited by 1 publication

References 3 publications

Nanocomposite organomineral hybrid materials. Part 3

Nanocomposite organomineral hybrid materials. Part 3

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