scholarly journals SYNTHESIS AND INVESTIGATION OF PROPERTIES OF NANODISPERSED SYSTEMS BASED ON VINYL ACETATE

2020 ◽  
Vol 63 (9) ◽  
pp. 56-62
Author(s):  
Raisa V. Rodionova
Keyword(s):  
Emulsion Polymerization ◽  
Vinyl Acetate ◽  
Raw Materials ◽  
State Standards ◽  
Spectrophotometric Analysis ◽  
Main Role ◽  
Surface Active ◽  
The Stability ◽  
Technology Of Production

A method of producing nanodispersed systems, stabilized by the solvation mechanism, which consists of carrying out the emulsion polymerization with surface-active monomers – alkyletoksimaleinata, is developed. The influence of temperature, the ratio of monomers, the hydrocarbon radical length and number of ethoxy functional groups on the rate of the process of obtaining nanodispersions is analyzed. The study of the properties of synthesized nanodispersed systems and aggregate storage stability showed that all indicators are within certain State Standards. The spectrophotometric analysis of nanodispersions showed that emulsion polymerization occurred in all cases. Kinetics of decomposition of the initiator in aqueous solutions in the presence of surface-active monomer showed that alkyletoksimaleinata activates the stage of initiation of obtaining nanodispersed systems. Alkyletoksimaleinata proved to be more effective than widely used in emulsion polymerization the emulsifier OP-10. It is established that nanodispersed systems are stable during storage. The use of nanodispersed systems, modified by surface-active monomers, makes it possible to exclude the stage of plasticization by low-molecular compounds that degrade the electrical properties of the product. This leads to a reduction in the material and energy costs, to an increase in the life of the product, since in this case there is no exudation of the plasticizer, which worsens the quality of the product and causes environmental pollution. It is established that the main role in the stability of nanodispersed systems, modified by surface-active monomers, plays the hydration of particles. The technology of production of modified nanodispersed systems based on vinyl acetate and surface-active monomer is developed. The technological scheme of production of modified nanodispersed systems is arranged, the binding of the main apparatus is made. Rational use of raw materials will allow to obtain a higher yield of the product. The nanodispersed systems, modified by surface-active monomers, can be used in all areas where systems with conventional emulsifiers are used.

The issue of "oil shrinkage" during the compounding of oils in the processes of production, collection, preparation and transportation of hydrocarbon raw materials

2021 ◽  
pp. 104-113
Author(s):  
O. P. Deryugina ◽  
E. A. Trapeznikov
Keyword(s):  
Raw Materials ◽  
Raw Material ◽  
Colloidal System ◽  
Main Pipelines ◽  
Different Types ◽  
Preliminary Study ◽  
The Stability ◽  
Mixed Oil

The article discusses the issue of industrial compounding, which improves the quality of the raw materials supplied to the main pipelines. Compounding from "to compound" (English) - to mix. When mixing different types of oil obtained, "incompatibility" is possible, which is expressed in the precipitation of a solid sediment and violation of the stability of the colloidal system and due to the differing properties of oils. Attention to this problem is due to the tightening of requirements for the quality of raw materials that must comply with modern standards. The article discusses the causes of the problem of "incompatibility" of oil during compounding and effective ways of solving it, substantiates the need for a preliminary study of the properties of mixed oil in order to identify possible incompatibility of various types of oil. The standard tests for determination of incompatibility indices characterizing the ability of raw materials to mix are considered. The article substantiates the need to develop methods for diagnosing the incompatibility of oils as the most important task of modern chemical science, the solution of which will improve the quality of the raw material obtained and solve many technological problems in the compounding process.

Evaluation and Application of Recipe for Binding Materials in Self-Compacting Concrete

2014 ◽  
Vol 629-630 ◽  
pp. 405-416
Author(s):  
Wei Chung Yeih ◽  
Jiang Jhy Chang ◽  
Mao Chieh Chi ◽  
Cheng Chin Chang ◽  
Ran Huang
Keyword(s):  
Raw Materials ◽  
Setting Time ◽  
Cementitious Materials ◽  
Heat Of Hydration ◽  
Test Results ◽  
New Era ◽  
Materials Research ◽  
Hardened Properties ◽  
The Stability

Concrete consists of many kinds of raw materials, the safety and quality of construction are greatly influenced by the stability of concrete. Thus, how to improve the performance of concrete and construction method, i.e. avoid the bleeding, segregation and honeycomb, etc, becomes a very important issue and imminent mission. This study discusses the different mixing designs of SCC with the amounts of cementitious materials ( OPC, GGBFS, and FA) ranged from 400 - 500 kg/m3. Meanwhile, the fresh and hardened properties of SCC, such as the slump flow, setting time, heat of hydration, and compressive strength were also determined. Test results indicate SCC binding materials can be classified by its compacting ratio. For instance, to pass the boxing test of R1/R2 within and without hindrance, the minimum binding materials should be 500kg/m3, 450kg/m3 and 400kg/m3. The optimum binding materials research shows if use cement, GGBFS and FA at the same time , it can increase the initial and final setting time and decrease the heat of hydration. The SCC binding materials’ concept will meet the requirement of " Safety, Durability, Workability and Ecology " for the new era. Thus, the amount of cement was at least 250kg/m3 or more for SCC mix design and the adding of GGBFS and FA was recommended to maintain 20 - 40 % of all cementitious materials based on the test results.

scholarly journals ANALYSIS OF THE EFFECT OF METHODS OF INTRODUCTION OF ORGANOMINERAL ADDITIVES INTO MORTARS ON FINE SANDS

2021 ◽  
Vol 4 (4) ◽  
pp. 32-40
Author(s):  
A. Uspanova ◽  
M. Hadzhiev ◽  
Z. Ismailov ◽  
I. Basnukaev
Keyword(s):  
Construction Projects ◽  
Building Materials ◽  
Raw Materials ◽  
Anthropogenic Activities ◽  
Mineralogical Composition ◽  
Environmental Safety ◽  
Technogenic Raw Materials ◽  
Technology Of Production ◽  
Natural Reserves

the use of technogenic raw materials in the production of building composites is an urgent direction in the technology of production of building materials in view of its economic efficiency, environmental effect and wide possibilities of their application. Recently, the issues of environmental safety in the production of building materials, the possibility of their processing and disposal have come to the fore. All this is dictated by the need for energy and resource conservation, the massive depletion of natural reserves and the progres-sive pollution of the environment due to anthropogenic activities. Construction composites provide ample opportunities for recycling of secondary raw materials, as their structure allows them to be used not only as a filler, but also in some cases as additives for regulating certain properties. More studied and widely used are ash and slag mixtures on the basis of which various organomineral additives are developed. So, on the territory of the Chechen Republic there are dumps of ash and slag mixtures, which, according to their chem-ical and mineralogical composition, are suitable for the design of organomineral additives and fillers in con-struction concretes and solutions. Building solutions are widely used for interior and exterior finishing works during the construction of construction projects in the Chechen Republic, which is characterized by high humidity in the winter, which provokes deformations of the plaster layer on facades. In this article, the de-velopment of an organomineral additive based on an ash-slag mixture is considered to improve the quality of mortar mixtures resistant to such conditions.

scholarly journals DRY MIXTURES AND MIXING EQUIPMENT FOR THEIR PRODUCTION

2021 ◽  
Vol 5 (12) ◽  
pp. 145-150
Author(s):  
Y. Fadin ◽  
O. Shemetova
Keyword(s):  
Building Materials ◽  
Raw Materials ◽  
Mixing Process ◽  
Chemical Additives ◽  
High Quality ◽  
Main Indicator ◽  
History Of ◽  
The Creation ◽  
The Stability

Today’s economic situation creates conditions for revising the existing base of materials and raw materials in construction, as well as for transforming and using it in the future. One of the ways to achieve this goal is the creation of new types of building materials, more effective and low in the price category compared to the classic ones. Dry building mixtures belongs to such materials. The high quality of dry building mixes is guaranteed by the stability of their composition and the properties of the ingredients used. Saving time when using high-quality dry building mixes will allow to get an irreproachable end result. A necessary component in the manufacture of dry building mixtures is the mixing process, which includes the preparation of raw materials, dosing and the distribution of chemical additives. The main indicator of the quality of the finished product in the production of dry mixes is its uniformity. Therefore, special attention is paid to the mixing section in the production line. The variety of bulk materials and their properties contributes to the creation of various types of mixers for high-quality mixing of components. The article discusses the history of the emergence of dry building mixes and mixing equipment for production.

scholarly journals THE USE OF FOOD ADDITIVE "MAHNETOFООD" IN THE TECHNOLOGY OF FORMED JELLY MARMELADE

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
I. Tsykhanovska ◽  
V. Yevlash ◽  
R. Trishch ◽  
T. Lazarieva ◽  
A. Alexandrov
Keyword(s):  
Aqueous Suspension ◽  
Food Additives ◽  
Food Additive ◽  
Gelling Agent ◽  
Technological Potential ◽  
Wide Range ◽  
Surface Active ◽  
The Stability ◽  
Physical And Chemical

Expansion and improvement of production of jelly and marmalade products requires the search for simplified resource- and energy-saving technology, increasing the stability of a colloidals dispersed system and improving the quality of finished products. Promising technological applications have food additives in the nanometer range, due to unique physical and chemical parameters and a wide range of functional and technological properties. The paper proposes a solution to the problem of stabilizing the colloidal structure of jelly marmalade products and the formation of their quality by using a food additive "Magnetofood" (based on oxides of divalent and trivalent iron: FeO·Fe2O3). "Magnetofood" – ultrafine powder with a particle size of ~80 nm, which has a high functional and technological potential: large specific surface area, surface-active, complexing, sorption, stabilizing properties. This allows us to recommend "Magnetofood" as a food additive of complex action to improve the quality and extend the shelf life of jelly marmalade products, in particular molded jelly marmalade. It is established that the addition of food additive "Magnetofood" in the form of an aqueous suspension at the stage of "swelling-dissolution" of the gelling agent improves the shape, surface and consistency; increases the moisture content by 1,15–1,16 times in agar samples and 1,13–1,14 times in pectin samples; reduces the total acidity by 1,05–1,08 times in agar samples and 1,06–1,09 times in pectin samples; inhibits microbial contamination of the surface of marmalade samples. In addition, the rational content of food additive "Magnetofood" – 0,15% by weight of the prescription mixture and the optimal conditions of temperature and humidity during storage of molded jelly marmalade for 90 days: relative humidity φ=(75±2)%, temperature (18±2)oC.

scholarly journals TECHNOLOGICAL PROPERTIES OF FLOUR AND THEIR EFFECT ON QUALITY INDICATORS OF SUGAR COOKIES

Food systems ◽  
2019 ◽  
Vol 2 (2) ◽  
pp. 13-19
Author(s):  
T. V. Savenkova ◽  
E. A. Soldatova ◽  
S. Yu. Misteneva ◽  
M. A. Taleysnik
Keyword(s):  
Quality Indicators ◽  
Wheat Flour ◽  
Raw Materials ◽  
Rheological Parameters ◽  
Technological Properties ◽  
Russian Scientific ◽  
Russian Scientific Research Institute ◽  
Confectionery Products ◽  
The Stability

The main recipe component of most types of flour confectionery is wheat flour, the technological properties of which largely effect not only the quality indicators of the finished product, but also the stability of the technological flow of its production. However, today, in Russia there are no specialized requirements for the quality of wheat flour for confectionery, in contrast to the requirements for the baking wheat flour. The article lists the main problems and features of the quality of Russian wheat flour consisting in the absence of target classifications of grain and a decrease in its qualitative potential, in particular, a decrease in the amount of gluten and improvement of its quality. As part of the work, the influence of the technological properties of wheat flour on the rheological parameters of the dough and the quality of sugar cookies, which are traditionally in high demand of population groups of every age, was studied, while the share of domestic products is more than 85%. The work was performed in the laboratory of flour confectionery products of All-Russian Scientific Research Institute of Confectionery Industry. The determination of organoleptic, physical and chemical, structural and mechanical indicators of raw materials, semi-finished products and finished products was carried out by standard methods.

scholarly journals Devising barrier technologies to ensure the stability of microbiological and organoleptic quality indicators of meat semi-finished products

2021 ◽  
Vol 6 (11 (114)) ◽  
pp. 84-89
Author(s):  
Sultan Sabraly ◽  
Irina Glotova ◽  
Sergey Shakhov ◽  
Alla Kutsova ◽  
Sholpan Abzhanova
Keyword(s):  
Shelf Life ◽  
Quality Indicators ◽  
Raw Materials ◽  
Meat Products ◽  
Meat Processing ◽  
Large Piece ◽  
Film Coatings ◽  
Different Temperatures ◽  
The Stability

Ways to ensure the quality and safety of meat processing products are being devised at an intensive pace. To solve these tasks, various "barriers" are used: chemical, physical, microbiological, as well as their combinations. When performing this research, a critical analysis of existing "barriers" as techniques to stabilize the quality of meat products with long shelf life was carried out. It has been revealed that the main preferences of consumers are associated with natural additives that ensure the safety of products. The introduction of modern barrier technologies is a relevant issue as it could ensure the stability of quality indicators during storage. An important task is to use natural raw materials as barriers. To this end, an analysis of the antioxidant activity of extracts from various plant-based raw materials was carried out. The results make it possible to devise technologies for creating film coatings with bioprotective properties. The dynamics of changes in the microbiological contamination of large-piece semi-finished products from beef in the process of storage at different temperatures were studied. It was found that the use of film barrier coatings leads to a restraining of the growth of microflora and has a bacteriostatic effect, which helps extend the shelf life of semi-finished products compared to control samples. The implementation of this study's results could significantly prolong the shelf life of meat semi-finished products, including at positive temperatures, without the risk of microbiological spoilage and loss of quality and functional-technological characteristics.

The Research on Comprehensive Utilization of Phosphogypsum

2013 ◽  
Vol 850-851 ◽  
pp. 1368-1371
Author(s):  
Bing Xin Du ◽  
Kun Huang
Keyword(s):  
Calcium Sulfate ◽  
Building Materials ◽  
Raw Materials ◽  
Soil Improvement ◽  
Comprehensive Utilization ◽  
Wet Process ◽  
Surface Active Agents ◽  
Surface Active ◽  
Calcium Sulfate Whisker

Introduce several examples of surface active agents used in wet-process phosphoric acid (WPPA) to show its effect on the quality of phosphogypsum. Summarized both domestic and foreign methods of comprehensive utilization of phosphogypsum, such as being made into calcium sulfate whisker, building materials, soil improvement agent, chemical raw materials and etc. Some problems of resources utilization of phosphogypsum in China are summarized, and reasonable suggestions are put forward.

Criteria for evaluation of the coordinate measurements quality of parts geometric parameters at pilot-experimental production

2019 ◽  
pp. 3-8
Author(s):  
N.Yu. Bobrovskaya ◽  
M.F. Danilov
Keyword(s):  
Quality Indicators ◽  
Quality Management System ◽  
Technical Specification ◽  
Experimental Production ◽  
Technological Heredity ◽  
Coordinate Measurements ◽  
Reasonable Choice ◽  
The Stability ◽  
Geometric Elements

The criteria of the coordinate measurements quality at pilot-experimental production based on contemporary methods of quality management system and traditional methods of the measurements quality in Metrology are considered. As an additional criterion for quality of measurements, their duration is proposed. Analyzing the problem of assessing the quality of measurements, the authors pay particular attention to the role of technological heredity in the analysis of the sources of uncertainty of coordinate measurements, including not only the process of manufacturing the part, but all stages of the development of design and technological documentation. Along with such criteria as the degree of confidence in the results of measurements; the accuracy, convergence, reproducibility and speed of the results must take into account the correctness of technical specification, and such characteristics of the shape of the geometric elements to be controlled, such as flatness, roundness, cylindrical. It is noted that one of the main methods to reduce the uncertainty of coordinate measurements is to reduce the uncertainty in the initial data and measurement conditions, as well as to increase the stability of the tasks due to the reasonable choice of the basic geometric elements (measuring bases) of the part. A prerequisite for obtaining reliable quality indicators is a quantitative assessment of the conditions and organization of the measurement process. To plan and normalize the time of measurements, the authors propose to use analytical formulas, on the basis of which it is possible to perform quantitative analysis and optimization of quality indicators, including the speed of measurements.

FUNDAMENTAL CAPITAL FINANCING OF PRODUCTION

2020 ◽  
Vol 8 (3) ◽  
pp. 74-78
Author(s):  
Farrux Zulfiyev ◽  
Keyword(s):  
Raw Materials ◽  
Economic Reforms ◽  
Equity Financing ◽  
Capital Financing ◽  
The Republic ◽  
The Stability

This article is based on the principles of shared financing of the production of raw materials. The article is aimed at financing the production of capital on the basis of equity in order to further strengthen the stability of economic reforms in the republic. At the same time, the essence of equity financing, the risks associated with it, and the efficiency of raw materials are covered

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