Epoxy

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1 - Theoretical Predictions on Mechanical Properties of Functionally Graded Epoxy/Clay Nanocomposites
Mahdi Karami Khorramabadi

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Open Access Article

2 - Thermomechanical Properties of the Polymeric Nanocomposite Predicted by Molecular Dynamics
Majid Hadipeykani farshid Aghadavoudi Davood Toghraie

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3 - Fabrication, Testing and Analysis of Composite Lattice Panels Under Three-Point Bending Load
Mahdi Farhadi Ali Davar Mohsen Heydari Beni Jafar Eskandari Jam

10.30486/admt.2021.1908801.1217

Thanks to their high strength-to-weight ratio, lightweightness, and excellent energy absorption, composite lattice panels can be used in the aerospace, marine, automotive, and other industries. These structures can be used as an alternative to string-reinforced structur More

Thanks to their high strength-to-weight ratio, lightweightness, and excellent energy absorption, composite lattice panels can be used in the aerospace, marine, automotive, and other industries. These structures can be used as an alternative to string-reinforced structures, honeycomb (core) sandwich panels, and aluminum grid structures. In this paper, a composite lattice panel is first fabricated from glass/epoxy by hand lay-up method using a silicon rubber mold. In this method, a Kagome composite lattice panel with twelve layers of resin-impregnated fibers was fabricated during a continuous process. After fabrication, the test panel was shown under three-point bending and failure modes. Also, a numerical simulation of three-point bending was performed in ABAQUS software. Then, the simulation results were compared with those of the experimental test, indicating a good convergence between the experimental test results and the finite element ones up to the point of failure. Due to changes in directions of force, these structures have a high ability to withstand damage, and therefore, continue to withstand the load after the failure of one or more ribs. Also, there is no sudden and sharp drop in the load-bearing capacity of the structure despite the force being maximized, which can be attributed to the high energy absorption of such structures. Instead, the force decreases slowly with fluctuations, and the structure continues to absorb energy until final failure. Therefore, such lightweight structures can be used in applications where energy absorption is of great importance. Manuscript profile

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4 - Comparison of thermal stability of cured epoxy resins with benzylidene bis-(4-hydroxycoumarin) derivatives
Ghasem Rahpaima Jalil Khezri

In this research, benzylidene bis-(4-hydroxycoumarin) derivatives were used as a curing agent to prepare epoxy resin with high performance and excellent thermal stability. For this purpose,4- benzylidene bis 4-hydroxycoumarin derivatives were synthesized using 2-aminoph More

In this research, benzylidene bis-(4-hydroxycoumarin) derivatives were used as a curing agent to prepare epoxy resin with high performance and excellent thermal stability. For this purpose,4- benzylidene bis 4-hydroxycoumarin derivatives were synthesized using 2-aminophenol/phoenix dactylifera polymer nanocomposite catalyst. Scanning Electron Microscope (SEM) technique was used to investigate the morphology of cured epoxy resin. The comparison of parameters of degradation start temperature, residual carbon yield and kinetic parameters was done to evaluate the thermal stability of cured epoxy resin using thermogravimetric analysis (TGA). The results showed that the epoxy resin cured with 3,'3-(4-nitrobenzylidene)bis(4-hydroxy-coumarin) have a high degradation start temperature and good carbon efficiency rather than other derivatives. After the 4-nitro derivative, the 4-chloro, 4-fluoro and 4-methyl derivatives have higher thermal stability. So it can be said that the nitro group has provided higher thermal stability rather than chloro, fluoro and methyl groups for cured epoxy resin. As a result, benzylidene 4-hydroxycoumarin derivatives bring high thermal stability to cured epoxy resin due to having aromatic rings Manuscript profile

Open Access Article

5 - Investigating the use of TiO2 and TiO2 microparticles waterproofed with nanotechnology in epoxy paint composite coatings on X52 steel
Amir Kazemi Ahmad Menshi Mehdi Boroujerdnia

In this research, two types of composite coatings based on epoxy paint reinforced by TiO2 nano and micro particles and TiO2 particles hydrophobicized by polysiloxane were prepared separately with concentrations of 1, 2, 3, 4 and 5% by weight to improve the properties of More

In this research, two types of composite coatings based on epoxy paint reinforced by TiO2 nano and micro particles and TiO2 particles hydrophobicized by polysiloxane were prepared separately with concentrations of 1, 2, 3, 4 and 5% by weight to improve the properties of epoxy paint. and in order to investigate their behavior, they were applied on API 5L X52 steel and then their properties were investigated by conducting corrosion and wear tests. The thickness of the coatings was checked by a digital thickness gauge. The corrosion resistance behavior of the coatings was evaluated using the polarization method in 3.5% NaCl solution. The results of the corrosion test showed that by adding and increasing the concentration of reinforcing particles in the coatings, the corrosion resistance was improved, and also the composite coating of epoxy paint with 5% by weight of the hydrophobic TiO2 reinforcement showed better corrosion resistance than other samples. A scanning electron microscope (SEM) equipped with EDX was used to examine the morphological properties of the surface. In order to check the dispersion of micro particles in the field of coating, Map analysis was taken from the samples. The results obtained from Map analysis have shown the appropriate and uniform distribution of hydrophobic particles in the field of epoxy coating. The wear resistance of the coatings was performed by the bullet test machine on the disc. The results of the abrasion test showed that by adding and increasing the concentration of reinforcing particles in the coating, the abrasion resistance of the coating increased, but by comparing the epoxy composite samples, it was found that the hydrophobicity of the reinforcing particles had no effect on the abrasion resistance. Manuscript profile

Open Access Article

6 - Preparation of surfactant modified inorganic nanofibers for the removal of oily compounds from water
Elnaz Doshanbeh pour

10.30495/ijtnbm.2023.1986087.1021

Oily compounds threat people’s health and aquatic life due to their toxic nature. In this project, surfactant grafted functionalized mesoporous silica nanofiber with the aim of separating the oil spillage was synthesized. Firstly, the electrospun mesoporous silica More

Oily compounds threat people’s health and aquatic life due to their toxic nature. In this project, surfactant grafted functionalized mesoporous silica nanofiber with the aim of separating the oil spillage was synthesized. Firstly, the electrospun mesoporous silica nanofiber was functionalized by [3-(2, 3- Epoxypropoxy)-propyl]-trimethoxysilane in an alkali condition. Secondly, the 4-nonylphenol as a surfactant was grafted onto the surface of functionalized mesoporous silica nanofiber. The grafting yield of surfactant on the surface of functionalized mesoporous silica nanofiber was evaluated. Then by using the BET analysis, the nanofibre surface area was investigated, and finally, optimum conditions with respect to the grafting yield of 4-nonylphenol and BET analysis were reported. In order to characterize the synthesized nanofibers, FTIR, SEM, and AFM analyses were used. The pore size distribution of synthesized nanofibers was investigated by the BJH method.The results showed that the [3-(2, 3- Epoxypropoxy)-propyl]-trimethoxysilane and surfactant were attached to the nanofiber surface through the covalent linkages. SEM images exhibited the deposition of a dense layer on the surface of grafted nanofibers. Moreover, AFM analysis revealed that the surface of the nanofiber became rough after the functionalization and grafting processes. In order to evaluate the superhydrophobic properties of nanofibers, contact angle analyses were investigated. The synthesized absorbent showed a high absorption capacity of 128.1 and 102.3 g/g for heavy motor oil and diesel fuel, respectively. The absorbed oil was easily removed by vacuum filtration and the nanofiber could be reused for several cycles while keeping high absorption capacity Manuscript profile

Open Access Article

7 - Electromagnetic Waves Absorption of the Epoxy Resin-MWCNT Composite Synthesis via Ultrasonic Bath and Milling Process
Sadegh Shahriyari Mahdi Omidi Seyyed Ali Hassanzadeh Tabrizi Mahdi Yeganeh Hamid Reza Bakhsheshi-Rad

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8 - Using of Thermoplastic Polyurethane Granule (TPU) as a Reinforcing Phase and Self-Healing Agent in a Polymer Composite Resin Epoxy to Exhibit Mechanical Properties Recovery
Mostafa Hosseini Aazam Ghassemi

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9 - Thermal and corrosion behavior of epoxy resin cured by poly(xanthone-amide) with functionalized magnetic nanoparticle
ghasem rahpaima

10.30495/jacr.2022.691484

Due to the desirable properties of poly xanthones, the present research investigates curing, thermal degradation and anticorrosion behavior of epoxy resin with poly(xanthone-amide) (PXAO) as curing agent, with melamine-functionalized Fe3O4 (m-Fe3O4) nanoparticles. Curin More

Due to the desirable properties of poly xanthones, the present research investigates curing, thermal degradation and anticorrosion behavior of epoxy resin with poly(xanthone-amide) (PXAO) as curing agent, with melamine-functionalized Fe3O4 (m-Fe3O4) nanoparticles. Curing kinetics of the systems were dynamically studied using differential scanning calorimetry (DSC). Kinetic parameters including activation energy (Ea) and rate constant (K) were calculated using Kissinger’s method and Ozawa-Flynn-Wall equation. Mass reduction behavior (including mass reduction temperatures and Ea) and thermal stability were characterized using thermogravimetric analysis (TGA). The results indicated higher activation energy and residual degradation (from 35% to 43%) at 750℃ in nitrogen atmosphere in the systems containing nanoparticles, as compared to the systems without the m-Fe3O4 nanoparticles. Results of potentiodynamic polarization tests to evaluate corrosion performance of the resin epoxy-coated stainless steel, showed that the PXAO had improved the anticorrosion activity of epoxy resin. Moreover, introduction of the m-Fe3O4 nanoparticles to the curing mixture significantly increased anticorrosion behavior of the epoxy resin by enhancing the paths through which water and oxygen could diffuse. Manuscript profile

Open Access Article

10 - Influence of nano graphene on water absorption in polyester/vinylester blend gel coats
Zeinab Rajabtabar Morteza Ehsani Azam Ghadami Yasser Amani

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11 - Effect of Reinforcer Percentage and Its Distribution on Mechanical Behavior of Alumina Reinforced Epoxy Composite
محمدحسین بینا کوروش شیروانی حمید رضا سلیمی جزی

In this paper, the shear and tensile properties of alumina reinforced epoxy composite have been studied. For this purpose, the composite samples were first produced with different weight percentages of alumina particles (10 to 50 percent). Then, the shear punching test More

In this paper, the shear and tensile properties of alumina reinforced epoxy composite have been studied. For this purpose, the composite samples were first produced with different weight percentages of alumina particles (10 to 50 percent). Then, the shear punching test was used for the evaluation of the shear and tensile properties of composite samples; the dispersion and distribution of alumina particles, interface of particles/ matrix, and the fracture surface of the samples were examined by the scanning electron microscope (SEM) equipped with EDS analyzer. The results of the tests showed that by the addition of alumina up to 30 percent resulted in homogenous and uniform distribution as well as more shear strength of composites. But, when the rate of the reinforcer exceeds 30 percent, the rate of the aggregation of the particles increases and consequently the composite strength is reduced. Also, a significant difference was observed between the fracture surface of pure epoxy and that of composites. Unlike pure polymers, the fracture surface of the composites reinforced with alumina (up to 30 percent) was more uneven, denoting an increase in the surface roughness due to the crack path deflection. Fracture in the reinforced composites with a percentage higher than 30 percent has again taken place due to the rate of low wetting of alumina particles with epoxy resin in particle-particle contacts. Manuscript profile

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12 - Evaluation of anti-corrosion performance of epoxy ester coating in the presence of a new generation of hybrid pigments based on Echium amoenum extract and zinc acetate
Amirsalar Dehghani Mahdi Tabatabaei, Mahdi Vahid Abouei Mehrizi

The impact of hybrid organic/inorganic pigments based on the herbal extract of Echium amoenum and zinc acetate on the corrosion protection performance of epoxy ester coating was investigated in this paper. The electrochemical impedance spectroscopy (EIS) measurement sho More

The impact of hybrid organic/inorganic pigments based on the herbal extract of Echium amoenum and zinc acetate on the corrosion protection performance of epoxy ester coating was investigated in this paper. The electrochemical impedance spectroscopy (EIS) measurement showed that the presence of hybrid pigment can expressively prevent the corrosion of steel in saline solution. The results of scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR), visible ultraviolet (UV-Vis) spectroscopy and static contact angle proved the formation of chelates and protective complexes in the pigment structure. The inhibition efficiency of 89.3% shows the same point. The low-frequency impedance value of epoxy coating increased in the absence and presence of the hybrid pigment from 344 MΩ cm2 to 6056MΩ cm2. This parameter was calculated after 45 days for the blank coating and the one containing pigment 4.2 MΩ cm2 and 200 MΩ cm2, respectively, which indicates the role of pigment in increasing the barrier performance of the coating. Increasing the overall resistance values equivalent to 16343 Ω.cm2 in the epoxy coating containing pigments with synthetic scratches shows the active inhibitory role of hybrid pigments. Manuscript profile

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13 - رفتارسنجی خمشی کامپوزیت الیاف کربن/اپوکسی توسط روش نشرآوایی
نیما بهشتی زاده امیر مصطفی پور

کامپوزیت الیاف کربن/اپوکسی یکی از پرکاربردترین کامپوزیت‌های زمینه پلیمری می-باشد که به دلیل خواص ویژه‌ای از قبیل استحکام بالا نسبت به وزن، سفتی ویژه بالا، مقاومت خوردگی بالا و مقاومت در برابر تابش اتمی، مصرف بالایی در صنایع مختلف از جمله صنایع هوافضا دارد. به همین جهت م More

کامپوزیت الیاف کربن/اپوکسی یکی از پرکاربردترین کامپوزیت‌های زمینه پلیمری می-باشد که به دلیل خواص ویژه‌ای از قبیل استحکام بالا نسبت به وزن، سفتی ویژه بالا، مقاومت خوردگی بالا و مقاومت در برابر تابش اتمی، مصرف بالایی در صنایع مختلف از جمله صنایع هوافضا دارد. به همین جهت مانیتورینگ بارگذاری این نوع کامپوزیت امری مهم است. به منظور شناسایی مکانیزم‌های خرابی کامپوزیت‌ها، روش آکوستیک امیشن کارایی بهتری در مقایسه با آزمون‌های غیر مخرب دیگر دارد. در این پژوهش از روش آکوستیک امیشن برای مانیتورینگ بارگذاری خمشی کامپوزیت الیاف کربن در زمینه اپوکسی استفاده شد. بدین منظور رفتار خمشی کامپوزیت و ارتباط آن با سیگنال‌های ساطع شده از نمونه تحت بارگذاری بررسی گردید. بکارگیری هر دو روش‌ تبدیل فوریه زمان کوتاه و تبدیل موجک در این پژوهش، نتیجه یکسان آن‌ها را در پی داشت. با استفاده از تبدیل فوریه زمان کوتاه، فرکانس بیشینه در این بارگذاری در حدود 140 کیلوهرتز تعیین شد که روش تبدیل موجک نیز همین محدوده را تایید کرد. محدوده زمانی رویدادهای رخ داده در نمونه تحت بارگذاری توسط نمودارهای برخط به دست آمده از سیستم آکوستیکی مانیتور گردید و در نهایت مکانیزم‌های شکست کامپوزیت با تصاویر میکروسکوپ الکترونی روبشی تایید شد. محدوده‌های زمانی و روند صعودی نمودارها، صحت سنجی خوبی با نمودار خمشی بر جای گذاشت. Manuscript profile

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14 - بررسی تأثیر استراتژیهای فرزکاری در ماشینکاری سطوح محدب از جنس کامپوزیت شیشه/اپوکسی
هادی محمدی هادی اسکندری ایمان دانایی

  در این تحقیق تأثیر پارامترهای مختلف ماشینکاری مانند سرعت برشی، پیشروی، قطر ابزار و عمق ماشینکاری بر استراتژیهای مختلف فرزکاری مانند آفست سه بعدی، مارپیچ، خطوط موازی و شعاعی برای ایجاد سطوح محدب قطعاتی از جنس کامپوزیت شیشه/اپوکسی مورد بررسی و اثر پذیری پارامترهای More

  در این تحقیق تأثیر پارامترهای مختلف ماشینکاری مانند سرعت برشی، پیشروی، قطر ابزار و عمق ماشینکاری بر استراتژیهای مختلف فرزکاری مانند آفست سه بعدی، مارپیچ، خطوط موازی و شعاعی برای ایجاد سطوح محدب قطعاتی از جنس کامپوزیت شیشه/اپوکسی مورد بررسی و اثر پذیری پارامترهای خروجی مانند صافی سطح و نرخ براده برداری نیز مورد مطالعه قرار گرفته است. نتایج به خوبی نشان می دهند که خروجی استراتژی رادیال دارای کمترین مقدار زبری و بالاترین کیفیت سطح می‌باشد و درمقابل استراتژی خطوط موازی با بیشترین مقدار زبری و نازل ترین کیفیت سطح همراه می باشد. بیشترین نرخ براده برداری و کوتاهترین زمان ماشینکاری مربوط به استراتژی آفست سه‌ بعدی می‌باشد. در این تحقیق بهینه‌ترین پارامترهای ماشینکاری جهت دستیابی به بالاترین صافی سطح همراه با بیشترین نرخ براده ‌برداری نیز مورد مطالعه قرار گرفته است. نتایج این کار تحقیقاتی می تواند در واحدهای پژوهش و توسعه بسیاری از صنایع بزرگ مورد استفاده و عملیاتی گردد. Manuscript profile

Open Access Article

15 - Synthesis of polymer matrix nanocomposite with carbon fibers and analysis of its strength properties
S.M.M. Shafiei

In polymer-based nanocomposites, carbon nanofibers have been used to improve mechanical properties in various applications. In this research, the tensile properties of carbon nanofibers have been used to create carbon-epoxy nanocomposite and improve the mechanical prope More

In polymer-based nanocomposites, carbon nanofibers have been used to improve mechanical properties in various applications. In this research, the tensile properties of carbon nanofibers have been used to create carbon-epoxy nanocomposite and improve the mechanical properties of epoxy nanocomposite, and the effect of the weight percentage of carbon nanofibers on the mechanical properties of epoxy nanocomposite has been investigated. Epoxy with weight percentages of 1.0, 5.0 and 1.5 carbon nanofibers were produced and their mechanical properties were investigated. The results showed that the use of even a small percentage of carbon nanofibers can lead to the improvement of mechanical properties. Manuscript profile

Open Access Article

16 - Tit Synthesis of polymer matrix nanocomposite with carbon fibers and analysis of its strength properties
seyed mohammad shafiei

In polymer-based nanocomposites, carbon nanofibers have been used to improve mechanical properties in various applications. In this research, the tensile properties of carbon nanofibers have been used to create carbon-epoxy nanocomposite and improve the mechanical prope More

In polymer-based nanocomposites, carbon nanofibers have been used to improve mechanical properties in various applications. In this research, the tensile properties of carbon nanofibers have been used to create carbon-epoxy nanocomposite and improve the mechanical properties of epoxy nanocomposite, and the effect of the weight percentage of carbon nanofibers on the mechanical properties of epoxy nanocomposite has been investigated. Epoxy with weight percentages of 1.0, 0.5 and 1.5 carbon nanofibers was produced and their mechanical properties were investigated. The results showed that the use of even a small percentage of carbon nanofibers can lead to the improvement of mechanical properties. Considering the fact that the non-uniform distribution of these nano-fibers in the epoxy matrix on the one hand and also the lack of acceptable adhesion between these two phases are critical issues that lead to the formation of lumps in the matrix and finally the loss of mechanical properties in will find. Manuscript profile

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