Reinforcement of Protective Coatings Based on Powder Paints with Alumina Nanofibers

2022 ◽  
Vol 1049 ◽  
pp. 138-143
Author(s):  
Mikhail M. Simunin ◽  
D.Yu. Chirkov ◽  
A.N. Zaloga ◽  
A.A. Kuular ◽  
Yury V. Fadeev ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Composite Materials ◽  
Polymer Composite ◽  
Polymer Matrix ◽  
Protective Coatings ◽  
Surface States ◽  
Effective Solution ◽  
Nanocomposite Powder ◽  
Alumina Nanofibers

The paper deals with the production and study of nanocomposite powder paints based on alumina nanofibers. For nanodispersed fillers, the nature of the surface states on the filler particles is important. The problem of introducing nanomaterials into a polymer matrix cannot provide an effective solution without matching the surface states of the nanomaterial filler and the polymer matrix for the resulting composite materials. The consistency of the surface states of the nanomaterial filler and the polymer matrix determines the quality of transfer of the necessary properties to the resulting polymer composite. In order to increase the affinity of alumina nanofibers with a matrix of powder paint, the nanofibers were treated with 3-glycidyloxypropyltrimethoxysilane (GLYMO) in toluene. It is shown in the work that the addition of alumina nanofibers leads to a hardening of the coating, an increase in its elasticity, and an increase in corrosion resistance. Finishing of alumina nanofibers in a solution of silane in toluene leads to its functionalization, which is sufficient for the distribution of nanofibers in the polymer matrix of the paint and improvement of its operational properties.

scholarly journals Rheological properties of dispersion-filled thermoplastics with different types of structures at various processing temperatures

2020 ◽  
pp. 19-22
Author(s):  
D. D. Krechetov ◽  
A. N. Kovaleva ◽  
I. D. Simonov-Emelianov
Keyword(s):  
Composite Materials ◽  
Rheological Properties ◽  
Polymer Composite ◽  
Polymer Matrix ◽  
Polymer Composite Materials ◽  
Dispersed Phase ◽  
Density Parameter ◽  
Wide Range ◽  
Different Types ◽  
Generalized Parameters

The article presents the results of a study of the rheological characteristics of dispersion-fi lled polymer composite materials (DFPCM) based on LDPE and glass balls of the ШСО-30 brand in a wide range of processing temperatures. For the fi rst time, the rheological properties of dispersion-fi lled polymer composite materials are considered from the standpoint of the formation of the dispersed phase with diff erent types of lattices, functional division of the polymer matrix (φp = Θ + В + М) and the construction of dispersed systems with diff erent types of structures (DS, LFS, MFS, HFS) in terms of generalized parameters (Θ, amid/d). This approach allows us to predict and describe the rheological properties for all DFPCMs with diff erent types of dispersed structures, using a dispersed phase (fi ller) with known geometric dimensions (d), packing density (parameter kpacking and φm) based on this polymer matrix. The infl uence of temperature on the processing technology of DFPCM with diff erent types of structures into products by injection molding has been established.

scholarly journals MODIFICATION OF THE METHOD FOR DETERMINING THE WETTABILITY OF CELLULOSE FIBROUS RAW MATERIALS FOR POLYMER COMPOSITE MATERIALS

2021 ◽  
pp. 111-117
Author(s):  
Д.В. Чащилов ◽  
А.А. Генина
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Raw Materials ◽  
Standard Procedure ◽  
Polymer Composite Materials ◽  
Test Material ◽  
Plant Fibers ◽  
Modified Method ◽  
Cellulose Materials

Для полимерных композиционных материалов (ПКМ) с армирующим наполнителем из натуральных волокон одними из проблем являются оценка качества подготовки волокон и определение динамики взаимодействия волокон и полимерной матрицы. Актуальность проблем обусловлена расширяющимся объёмом исследований ПКМ с растительными волокнами и разнообразными видами и глубиной предварительной обработки растительных волокон. Предметом исследования выступил стандартный метод определения смачиваемости целлюлозных материалов. Цель экспериментального исследования – предложить модифицированный метод определения смачиваемости, потенциально пригодный для оценки качества подготовки армирующих наполнителей ПКМ из растительных волокон. Использован стандартный по ГОСТ и модифицированный метод определения смачиваемости. В качестве пробного материала использовали целлюлозу древесную, полубелёную сульфитную из хвойной древесины в форме целлюлозной папки. Образцы целлюлозы механически разрыхляли до элементарных волокон и испытывали на смачиваемость. Использовали три схемы испытаний – взвешивание стаканчика с навеской, погруженного в воду (схема 1), взвешивание сосуда с водой (схема 2), стандартную методику по ГОСТ (схема 3). По схемам 1 и 2 измерения проводили в течение до 120 секунд, по схеме 3 – 30 секунд. Эксперименты проводили в трёхкратной повторности. Сущность модифицированного метода определения смачиваемости основана на постоянном контроле массы навески по мере сорбции водной влаги. Полученные закономерности кинетики процесса показали, что количество водной влаги, впитываемой образцами, нелинейно меняется во времени. Величины смачиваемости, определённых по различным схемам, с учётом отклонений, соответствуют друг другу. Определение смачиваемости по модифицированному методу предложено проводить в течение 120 секунд, периодически контролируя показания весов. Предложенный модифицированный метод может быть использован в исследовательских целях для изучения динамики впитывания воды и сравнения поведения различных целлюлозных материалов для ПКМ с матрице на основе гидрофильных полимеров. For polymer composite materials (PCM) with a reinforcing filler made of natural fibers, one of the problems is to assess the quality of fiber preparation and determine the dynamics of the interaction of fibers and a poly-dimensional matrix. The urgency of the problems is due to the expanding volume of research on PCM with plant fibers and various types and depth of pretreatment of plant fibers. The subject of the study was a standard method for determining the wettability of cellulose materials. The purpose of the experimental study is to propose a modified method for determining wettability, potentially suitable for assessing the quality of preparation of reinforcing fillers of PCM from plant fibers. The standard GOST and modified method for determining wettability were used. As a test material, wood cellulose, semi-green sulfite from coniferous wood in the form of a cellulose folder was used. Cellulose samples were mechanically loosened to elementary fibers and tested for wettability. Three test schemes were used – weighing a cup with a suspension immersed in water (scheme 1), weighing a vessel with water (scheme 2), standard procedure according to GOST (scheme 3). According to schemes 1 and 2, measurements were carried out for up to 120 seconds, according to scheme 3 – 30 seconds. The experiments were carried out in threefold repetition. The essence of the modified method for determining the permeability is based on the constant control of the weight of the suspension as the sorption of water moisture. The obtained laws of the kinetics of the process showed that the amount of water moisture absorbed by the samples varies non-linearly over time. The wettability values determined according to various schemes, taking into account deviations, correspond to each other. The determination of wettability by the modified method is proposed to be carried out within 120 seconds, periodically monitoring the readings of the scales. The proposed modified method can be used for research purposes to study the dynamics of water absorption and compare the behavior of various cellulose materials for PCM with a matrix based on hydrophilic polymers.

scholarly journals Mechanical Properties of GFR & Graphite Epoxy Polymer Composites

2020 ◽  
Vol 5 (6) ◽  
pp. 560-565
Author(s):  
A. Aakash ◽  
S. Selvaraj
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Composite Materials ◽  
Polymer Composite ◽  
Epoxy Polymer ◽  
Significant Degree ◽  
Polymer Composite Material ◽  
Water Ingestion ◽  
Selection Of

Composite materials have the great potential and widely used as building material in numerous applications. Polymer composite material obtains the necessary properties in a controlled significant degree by the selection of strands and lattice. The properties of the materials have been selected by choosing the correct proportion of matrix and reinforcements. To build the quality of the material by expanding the fiber substance of the material. In this current examination, the mechanical properties of the glass fiber and graphite is strengthened with epoxy polymer composite were considered. Here the open embellishment method was received for the manufacture of the polymer composite The mechanical properties, for example, rigidity, compression quality, sway quality and water ingestion test was resolved according to the ASTM norms. The mechanical properties were improved as the filaments support content expanded in the grid material.

scholarly journals РОЗРОБЛЕННЯ ПРОГРАМНОГО ЗАБЕЗПЕЧЕННЯ ДЛЯ ОЦІНЮВАННЯ ОДНОРІДНОСТІ РОЗПОДІЛУ НАПОВНЮВАЧА В ПОЛІМЕРНІЙ МАТРИЦІ

2022 ◽  
pp. 37-44
Author(s):  
DMІTRIY NOVAK ◽  
KATERYNA MARYNIAKA
Keyword(s):  
Composite Materials ◽  
Polymer Matrix ◽  
Colloidal Particles ◽  
Polyethylene Matrix ◽  
Colloidal Graphite ◽  
Graphite Content ◽  
Python Programming Language ◽  
Two Stages ◽  
Python Programming

Purpose. Creation of software for evaluating the uniformity of distribution of the filler in a polyethylene matrix.Methodology. Software development was carried out using the Python programming language and libraries: PIL, Numpy, Matplotlib, Xlsxwriter. The suitability of the developed software for use was determined by verifying it. During this verification, polyethylene compositions filled with colloidal graphite in the form of compressed films were evaluated. To obtain these compositions, we chose P6006AD grade polyethylene and C-1 colloidal graphite. Samples of polyethylene compositions were obtained in two stages: 1) obtaining a strand by extrusion; 2) additional mixing of the composition on a disc mixer and pressing the obtained compositions into a film.Findings. The software has been developed to assess the uniformity of the distribution of the filler in the polyethylene matrix. The data were established on the dependence of the coefficient of heterogeneity of polyethylene compositions on the content of colloidal graphite with use of the developed software. The increase in the content of the filler leads to a decrease in its heterogeneity. It is shown that this effect can be explained by the structuring of the filler in the polyethylene matrix. Despite the formation of aggregates in polyethylene compositions, a significant amount of small colloidal particles of graphite is located between the aggregate space. This leads to a certain leveling of the concentration in the film and reduces its inhomogeneity.Scientific novelty. The influence of the content of colloidal graphite on the homogeneity of polyethylene compositions is determined. It is shown that with an increase in the graphite content from 0 to 20% vol. the coefficient of heterogeneity of the composition decreases from 5.3% to 3.9%, which is due to the structuring of the filler in the polyethylene matrix.Practical value. Software that makes it possible to evaluate the uniformity of the distribution of filler particles in a polymer matrix, and can be used to study the quality of mixing of polymer composite materials has been developed.

Research of Hardness of Polymer Composite Materials Based on Silicone and Aluminium Hydroxide with Various Mechanical-Chemical Processing

2021 ◽  
Vol 316 ◽  
pp. 9-15
Author(s):  
N.Y. Efremov ◽  
O.A. Oreshina ◽  
V.D. Mushenko
Keyword(s):  
Composite Materials ◽  
Polymer Composites ◽  
Polymer Composite ◽  
Polymer Matrix ◽  
Aluminium Hydroxide ◽  
Functional Materials ◽  
Polymer Composite Materials ◽  
Chemical Processing ◽  
Fluid State ◽  
Powder Filler

Polymer composites are one of the types of modern functional materials. This class includes many different in structure and field of application materials, including dispersed-filled polymer composites [1]. Such materials are made by mixing a polymer matrix in a fluid state with a powder filler and then curing. The properties of the resulting materials are influenced by a variety of factors, including the nature of the preliminary (prior to addition to the mixture with the polymer) mechanical-chemical processing of the filler.

Ensuring the quality of the surface in the processing of hardened steels, titanium alloys and polymer composite materials

2021 ◽  
pp. 263-268
Author(s):  
P.A. Sablin ◽  
V.S. Shchetinin
Keyword(s):  
Composite Materials ◽  
Titanium Alloys ◽  
Polymer Composite ◽  
Output Parameter ◽  
Cutting Process ◽  
Polymer Composite Materials ◽  
Machined Surface ◽  
Multifactorial Approach ◽  
Required Quality

A multifactorial approach to ensuring the required quality of the machined surface of difficult-to-machine and hardened materials is considered, which takes into account a wide combination of controllable parameters of machining. A scheme of multifactorial influence on the output parameter of the cutting process — roughness is proposed.

Development of Composite Materials Based on Ultrahigh-Molecular Weight Polyethylene and Thermally Expanded Graphite

2019 ◽  
Vol 945 ◽  
pp. 374-378
Author(s):  
O.V. Gogoleva
Keyword(s):  
Molecular Weight ◽  
Composite Materials ◽  
High Molecular Weight ◽  
Polymer Composite ◽  
Polymer Matrix ◽  
Expanded Graphite ◽  
Necessary Condition ◽  
Thermally Expanded Graphite ◽  
Stress Strain ◽  
Ultra High Molecular Weight

In connection with the huge range of ultra-high molecular weight polyethylene (UHMWPE) grades, the choice of a particular brand is a difficult task. Rational choice of the polymer matrix is a necessary condition for the increase in reliability and service life of products, and consequently, for the efficiency of using these composite materials. The given article presents the results of tests on stress-strain properties of GUR-2122, 4113, 4120, 4130, 4150, 4170 and GHR-8020 ultra-high molecular weight polyethylene grades. GUR-4150 UHMWPE is chosen as the polymer matrix on the base of the test results. It is shown that the friction coefficient of the polymer composite material is reduced even with the modification of UHMWPE with nanodispersed thermally expanded graphite (TEG) in amount of 0.001-0.5 mass%. It is established that the rate of mass wear decreases by 3-4.3 while maintaining the stress-strain properties of the composites at the level of the initial UHMWPE. Polymer composite materials with an improved set of performance indicators are developed.

Corrosion resistance tests of strained rods from polymer composite materials

2011 ◽  
Vol 47 (15) ◽  
pp. 1713-1716 ◽  
Author(s):  
A. V. Markova ◽  
V. F. Savin ◽  
Yu. B. Zharinov ◽  
A. N. Blaznov
Keyword(s):  
Corrosion Resistance ◽  
Composite Materials ◽  
Polymer Composite ◽  
Polymer Composite Materials ◽  
Resistance Tests

Sherardizing and Characteristic of Zinc Protective Coating on High-Strength Steel Bridge Cable Wires

2010 ◽  
Vol 97-101 ◽  
pp. 1368-1372 ◽  
Author(s):  
Jing Hua Jiang ◽  
Ai Bin Ma ◽  
Xin Du Fan ◽  
Ming Zi Gong ◽  
Liu Yan Zhang
Keyword(s):  
Corrosion Resistance ◽  
High Strength Steel ◽  
Protective Coatings ◽  
Steel Wire ◽  
High Strength ◽  
Steel Bridge ◽  
X Ray Diffraction ◽  
High Carbon ◽  
Bridge Cable

Zinc protective coatings on high carbon SWRH82B-1 steel were sherardized to markedly improve corrosion resistance of the high-strength steel bridge cable wires (SBCW). Sherardizing parameters have been optimized by optical microscopy (OM) /scanning electron microscopy (SEM), X-ray diffraction (XRD) and potentiodynamic polarization tests. The sherardizing coatings are composed of the loose outer layer (§-FeZn13 phase) and the dense inner layer (δ- FeZn7 phase) with higher hardness. Addition of Y2O3 activator slightly increases the corrosion resistance of sherardized steel wire in comparison with CeO2. A thicker coating corresponds to a higher sherardizing temperature or a longer heating duration, but an extra thick coating is unfavorable for thru-microcrack existed in the inner layer. Good quality of sherardized wires ( higher corrosion resistance and longer duration than conditional hot-dip-galvanized one) can be produced with the zinc-rich powder containing 7.5wt.% CeO2 activator and 25wt. % SiO2 filler under 400°Cfor 6h.

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