This article presents one of the promising ways of wear resistance improvement of nanoadditives  modification coatings. The protective and decorative coating, composed of nanoadditives, was used to  make samples. Testing samples showed that the use of nanoadditives improves coating operational characteristics, or wear resistance in this case. The dependence of wear resistance coatings on the flow nanoadditives was studied

Ignatovich, L. V.

Romanova, A. M.

Utgof, S. S.

This article presents one of the promising ways of wear resistance improvement of nanoadditives modification coatings. The protective and decorative coating, composed of nanoadditives, was used to make samples. Testing samples showed that the use of nanoadditives improves coating operational characteristics, or wear resistance in this case. The dependence of wear resistance coatings on the flow nanoadditives was studied

Belarusian State Technological University

ISSN 1683-0377. Proceedings of BSTU. 2012. Issue 4. Chemistry, Organic Substances Technology and Biotechnology 100УДК 692.53+811 S. S. Utgof, PhD student (BSTU); L. V. Ignatovich, PhD (Engineering), assistant professor (BSTU);  A. M. Romanova, PhD (Pedagogy), senior lecturer (BSTU) APPLICATION OF NANOADDITIVES  FOR WEAR RESISTANCE IMPROVEMENT  OF PARQUET PROTECTIVE AND DECORATIVE COATINGS This article presents one of the promising ways of wear resistance improvement of nanoadditives modification coatings. The protective and decorative coating, composed of nanoadditives, was used to make samples. Testing samples showed that the use of nanoadditives improves coating operational cha-racteristics, or wear resistance in this case. The dependence of wear resistance coatings on the flow na-noadditives was studied. Introduction. Nowadays it becomes important to find and develop new technological solutions for floor coverings manufacture, making it possible to reduce the use of expensive materials significantly, including application of high-quality wood in the parquet floors production. The most perspective and effective method of improving the flooring service characteristics is to use the modified pro-tective and decorative coatings.  Improving the coatings wear resistance is asso-ciated with an increase in flooring service life, as-sociated with caretaking of wood as a whole. Main part. In this article we investigate sev-eral ways of modifying and testing coatings ob-tained with the use of modified materials.  Parquet lacquer should be selected on the ba-sis of the actual load coming to the floor for the apartments where it will go to a small number of people. Such flooring requires parquet lacquer (or floor) with a normal load. For non-residential pre-mises (where there will be a lot of people) parquet lacquer with increased load should be selected. For such areas as museums, theaters, restaurants, and shops (where there is always a huge flow of peo-ple) the varnish for parquet doesn’t suit unlike rub wax pastes or oil impregnation, as in this case a useful layer of parquet is not pre-polished and serves longer. The coating quality includes a set of service properties, providing durability and the decorative, protective or special characteristics. While the basic level of operational coating properties is determined by the chemical nature and structure of the film former (which forms the coating matrix), all other paint material compo-nents can be regarded as modifiers. Modification is any improvement in the char-acteristics specific to the surface, carried out by adding the functional additives to the current for-mulation.  Different modifier additives of parquet floors are designed to improve its operational characteris-tics, such as adhesive strength, durability, and re-sistance to scratching. Nowadays, nanotechnology is one of the most perspective areas of science, and research and de-velopment at the nanoscale are widely used in var-ious industries. The metal and metal-oxide powders, as well as carbon nanotubes make up majority of the total production of nonmaterial. Mixed metal oxides, non-oxide materials and silicates come next. Most of these materials are not “new” and have been already widely used in industry, while carbon nanotubes (fullerene) are relatively new [1]. Every day a variety of nanoparticles applica-tions increases. Nanoparticles are widely used as special additives or raw materials for the manufac-ture of emulsions, composites and coatings. For example, in 2003 the global market of polymer-nanocomposites was 90 million USD.  And in 2008 this figure was 210 million USD. Nanofillers can improve some properties of po-lymeric materials: • Mechanical properties (strength, dimensional stability, and modular); • Resistance to various surroundings (gas, wa-ter and carbon); • Thermal stability and heat resistance; • Resistance to combustion and reduced smoke discharge; • Chemical resistance; • Appearance; • Electrical conductivity and optical trans-parency; • Resistance to sunlight. It should be noted that nanomaterials have been long used for the paints. These are primarily natural materials used as fillers, such as talc, mica, asbestos, and products based on clay (bentonite). Liquid glass, ethyl silicate, and microgel film for-mers are used as film-forming materials. The price of the product is greatly imports for industrial application. In most cases, nanomaterials are more expensive than conventional materials. However, when the consumer gets a product with unique properties, that allow us to solve some im-portant tasks, the question of price is secondary. Usually economically successful application of Chemistry, Technology of Organic Substances, Materials and Goods 101nanomaterials requires a small amount of material with enhanced properties.  The main idea of the nanomaterials use is their application for paint systems, not as common fill-ers, but as additives significantly improving safety and operational characteristics of coatings. Such inorganic nanoparticles as nanopowders are widely used in paint industry. Characteristics of some nanoparticles are given in Table 1. For the tests, we selected three batches of specimens with different structure of the coat-ing. At an average, complete protective and deco-rative coating requires application of 13–14 layers of coating materials: pigments, primers, and var-nish. The UV-curing coating materials have shown the best strength characteristics. The coating characteristics were the subject of tests. Each coating layer performs a separate func-tion: soils improve wetting, adhesion, elasticity, wear resistance, and hardness; while lacquer im-proves elasticity, abrasion resistance, durability, and chemical resistance. Main focus of the study was given on such coating characteristic as wear resistance. As de-fined above, nanoadditives (metalnanopowders) are used to improve wear resistance, additives are put in the soil. We have exposed dependence of wear resis-tance on the soil rate with the addition of alumi-num oxide. To change the flow rate we used a dif-ferent number of soil layers. Samples were pre-pared at the “Coswick” factory with the industrial materials application.  The purpose of the work was to determine im-provement of operational characteristics of parquet hardwood products, to study the strength character-istics of protective and decorative coatings for the parquet production. These types of coating possess good abrasion resistance, scratch, hardness, and elasticity. The object of the study is coating used in the parquet production. Coatings were tested in accordance to the EN438-2: 2005 [2]. Testing required electronic scales, thinner, con-trast fluid, 100×100 mm coated samples with the hole in the center (7 mm in diameter), rags, and taber test. Test execution order is described below.  We prepared strips of sandpaper grit P180, coated with aluminum oxide (for Taber Test S42 or its equivalent). Samples were kept at a temperature (23 ± 2)°C and relative humidity (50 ± 5)%. Then three sam-ples of one type of coatings were tested and, as a result, the average value was taken. Samples were wiped with the organic solvent, installed and fas-tened on a rotating disk with abrasive wheels. Checking up the test sample every 25 turns, we just checked the sanding paper for sanding dust clog-ging. Then paper was replaced as it became clogged after every 500 revolutions. The test was kept on until we reached the point of deterioration beginning (IP). The IP came when there were clearly identified first worn coat-ings with an area of 0.6 mm2 in three-quarters of  a circle. Tests were carried out before the end deteriora-tion point (FP). The FP came when 95% coatings erased. Wear resistance (WR), revolving (rev), are determined by the formula IP FPWR , rev.2+= Table 1 Characteristics of Nanoparticles Name Function Designation Silicon dioxide SiO2 Filling pores Increased resistance to scratching and cor-rosion action Titanite dioxide TiO2 UV-absorbance UV absorber, achieving the optical effects and improving the resistance to scratching Aluminum oxide Al2O3 Filling pores Increased resistance to scratching and cor-rosion protection Aluminum hydroxide γ-AlO(OH) Filling pores Increased resistance to scratching and cor-rosion protection Cerium oxide CeO2 UV-absorbance, catalysis Increased resistance to scratching, corrosion protection, and thermal catalysis Zirconium dioxide ZrO2 Filling pores, catalysis Increased resistance to scratching corrosion protection, and catalysis ISSN 1683-0377. Proceedings of BSTU. 2012. Issue 4. Chemistry, Organic Substances Technology and Biotechnology 102Table 2 The Results of the Tests Value, rev. Batch number Type  of coating Flow rate of soil with the addition of  aluminum oxide, g/m2 Sample number IP FP WR Wear resistance, rev. 1 700 850 775 2 700 820 760 1 Standard finish with the top layer of varnish 28 3 700 920 810 782 1 700 880 790 2 500 630 565 2 Standard coating with-out layer of varnish 28 3 550 870 710 688 1 1,360 1,510 1,435 2 1,390 1,520 1,455 3 Enhanced coating with-out varnish layer 46 3 1,410 1,610 1,510 1,467  The test samples wiped with a contrast liquid to make it easier to determine the extent of coat-ings grated. The test results are given in Table 2. The obtained study results confirm the efficacy of nanoadditives in the woodworking industry. Also the experiment helped to study coatings, imparting greater strength and durability. Conclusion. We studied coatings structure in composition of nanoadditives (like aluminum ox-ide) and analyzed patent study to come to the fol-lowing conclusion: • Coatings durability increased at the increase of soil (with aluminum oxide) consumption; • Coating obtained from the UV-curing mate-rials possesses more hardness and strength; • Coating applied at the factory is more durable; • Each separate type of soil improves the indi-vidual coatings quality, and all used materials make film flexible; • Coatings durability increased to increase soil consumption with aluminum oxide; • Application of a large number of layers in-creases the adhesion of soil material. The results confirm the efficiency of nanoaddi-tives for the woodworking industry. A large number of different materials, used as additives, enables to search modifiers improving the coatings quality without its cost changing. Na-nopowders are considered to be most promising material, used in small quantities that significantly affect the product price. The work is of undeniable economic impor-tance as it helps to improve operational character-istics of flooring. These operational characteristics contribute to the rational use of forest resources of the Republic of Belarus. It is advisable to continue the search modifiers to improve operational char-acteristics of floor covering (and its durability in particularly). References 1. Мир материалов и технологий. Наност-руктурные материалы / под ред. Р. Ханнинка. – М.: Техносфера, 2009. – 488 с. 2. High-pressure decorative laminates (HPL) – Sheets based on thermosetting resins (usually called laminates) – Part 2: Determination of prop-erties: DIN EN 438-2:2005. – Введ. 01.01.2005. –Foreign Standard, 2005. – 57 p. Received 16.03.2012

Application of nanoadditives for wear resistance improvement of parquet protective and decorative coatings

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Application of nanoadditives for wear resistance improvement of parquet protective and decorative coatings

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