Effect of nano TiO2 particle size on mechanical properties of cured epoxy resin

2010 ◽  
Vol 69 (3) ◽  
pp. 241-246 ◽  
Author(s):  
Hamad A. Al-Turaif
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Epoxy Resin ◽  
Tio2 Particle ◽  
Nano Tio2

scholarly journals Effect of Particle Size on the Mechanical Properties of TiO2–Epoxy Nanocomposites

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2866
Author(s):  
Young-Min Choi ◽  
Seon-Ae Hwangbo ◽  
Tae-Geol Lee ◽  
Young-Bog Ham
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Tensile Strength ◽  
Epoxy Resin ◽  
Tio2 Nanoparticles ◽  
Strengthening Effect ◽  
Epoxy Nanocomposites ◽  
Nano Tio2 ◽  
Reinforcing Effect ◽  
Uniform Dispersion

This study investigated the effects of the packing density and particle size distribution of TiO2 nanoparticles on the mechanical properties of TiO2–epoxy nanocomposites (NCs). The uniform dispersion and good interfacial bonding of TiO2 in the epoxy resin resulted in improved mechanical properties with the addition of nanoparticles. Reinforcement nano-TiO2 particles dispersed in deionized water produced by three different ultrasonic dispersion methods were used; the ultrasonication effects were then compared. The nano-TiO2 suspension was added at 0.5–5.0 wt.%, and the mechanical and thermal properties of TiO2–epoxy NCs were compared using a universal testing machine, scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR), and differential scanning calorimetry (DSC). The tensile strength of the NCs was improved by the dispersion strengthening effect of the TiO2 nanoparticles, and focused sonication improved the tensile strength the most when nano-TiO2 suspensions with a particle size of 100 nm or smaller were used. Thus, the reinforcing effect of TiO2 nanoparticles on the epoxy resin was observed, and the nano-TiO2 suspension produced by focused sonication showed a more distinct reinforcing effect.

scholarly journals A Study on the utilization of coffee grounds for particle board

2021 ◽  
Vol 10 (2) ◽  
pp. 48-52
Author(s):  
Cut Rizka Maulida ◽  
Mursal Mursal ◽  
Ismail Ismail
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Compressive Strength ◽  
Physical Properties ◽  
Epoxy Resin ◽  
Particle Sizes ◽  
Particle Board ◽  
Thickness Swelling ◽  
Coffee Grounds ◽  
Coffee Ground

Abstrak. Penelitian ini bertujuan untuk membuat papan partikel dengan menggunakan limbah ampas kopi dan resin epoksi sebagai perekat. Komposisi resin epoksi divariasikan yaitu 5, 10, 15 dan 20 vol.% untuk masing-masing partikel ampas kopi berukuran 20 dan 40 mesh. Papan partikel dibuat dengan teknik pressing dengan beban sebesar 9 ton selama 30 menit. Sifat mekanik yang diuji adalah MOE, MOR, dan kuat tekan. Sifat fisis papan partikel yang diuji adalah kerapatan dan pengembangan tebal. Hasil menunjukkan bahwa nilai MOE tertinggi yaitu 20,910 kgf/cm2 pada komposisi 95 vol.% ampas kopi dan 5 vol.% resin epoksi dengan ukuran ampas kopi 40 mesh. MOR tertinggi yaitu 167 kgf/cm2 pada ukuran partikel 40 mesh dengan komposisi ampas kopi 90 vol.% dan resin epoksi 10 vol.%. Nilai kuat tekan tertinggi diperoleh 220 kgf/cm2 pada 20 mesh, dengan komposisi 85 vol.% ampas kopi dan 15 vol.% resin epoksi. Kerapatan dan pengembangan tebal papan partikel yang tertinggi masing-masing adalah 1,16 g/cm3 dan 0,85%. Secara umum, sifat mekanis papan partikel ampas kopi tergantung pada komposisi dan ukuran partikel ampas kopi. Namun, sifat fisisnya tidak berubah secara signifikan untuk ukuran partikel dan komposisi yang berbeda. Papan partikel yang diperoleh dari penelitian ini memenuhi standar ANSI sehingga berpotensi untuk dijadikan sebagai papan partikel atau komposit. Abstract.. This study aims to make a particle board using coffee ground waste and epoxy resin as an adhesive. The composition of the epoxy resin was varied, namely 5, 10, 15 and 20 vol.% for 20 mesh and 40 mesh of coffee grounds particles. Particle board is made by pressing technique with a load of 9 tons for 30 minutes. The mechanical properties tested were MOE, MOR, and compressive strength. The physical properties of the particle board tested were density and thickness swelling. The results showed that the highest MOE particle board was 20.910 kgf/cm2 (95 vol.% coffee grounds:5 vol.% epoxy resin; 40 mesh). The highest MOR was 167 kgf/cm2 (90 vol.% coffee grounds:10 vol.% epoxy resin;40 mesh). The hihgest compressive strength values was 220 kgf/cm2 (85 vol.% coffee grounds:15 vol.% epoxy resin;20 mesh). The highest density and thickness expansion were 1.16 g/cm3 and 0.85%, respectively. In general, the mechanical properties of coffee grounds particleboard depend on the composition and particle size of coffee grounds. However, their physical properties do not change significantly for different particle sizes and compositions. The particle board obtained from this study meets the standard of ANSI. Thus, coffee grounds have the potential to be used as particle board or composite. Keywords particle board, coffee grounds, epoxy resin, mechanical properties, physical properties

Effect of particle size on mechanical properties of epoxy resin filled with angular-shaped silica

1992 ◽  
Vol 44 (1) ◽  
pp. 151-158 ◽  
Author(s):  
Yoshinobu Nakamura ◽  
Miho Yamaguchi ◽  
Masayoshi Okubo ◽  
Tsunetaka Matsumoto
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Epoxy Resin ◽  
Effect Of Particle Size

scholarly journals Evaluation the Mechanical Properties of Kaolin Particulate Reinforced Epoxy Composites

2018 ◽  
Vol 14 (1) ◽  
pp. 29-38
Author(s):  
Jabbar Hussein Mohmmed
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Epoxy Resin ◽  
Flexural Modulus ◽  
Epoxy Composites ◽  
Elongation At Break ◽  
Crack Propagation Resistance ◽  
Brittle Behavior ◽  
Accuracy Of Prediction ◽  
Particulate Reinforced

Epoxy resin has many chemical features and mechanical properties, but it has a small elongation at break, low impact strength and crack propagation resistance, i.e. it exhibits a brittle behavior. In the current study, the influence of adding kaolin with variable particle size on the mechanical properties (flexural modulus E, toughness Gc, fracture toughness Kc, hardness HB, and Wear rate WR) of epoxy resin was evaluated. Composites of epoxy with varying concentrations (0, 10, 20, 30, 40 weights %) of kaolin were prepared by hand-out method. The composites showed improved (E, Gc, Kc, HB, and WR) properties with the addition of filler. Also, similar results were observed with the decrease in particle size. In addition, in this study, multiple regression models were developed by utilizing (SPSS) package to predict the properties of kaolin reinforced epoxy composites. Good agreement was obtained between the predicted and the experimental results. The accuracy of prediction was (89.71%, 80.58%, 85.82%, 92.27%, and 94.49%) for E, Gc, Kc, HB, and WR, respectively.    

scholarly journals Mechanical properties of coconut shell particle board using epoxy resin adhesive

2021 ◽  
Vol 10 (2) ◽  
pp. 36-40
Author(s):  
Zia Nurkhalida Hatta ◽  
Mursal Mursal ◽  
Ismail Ismail
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Epoxy Resin ◽  
Modulus Of Elasticity ◽  
Elasticity Modulus ◽  
Agricultural Waste ◽  
Coconut Shell ◽  
Modulus Of Rupture ◽  
Particle Board ◽  
Shell Composition

Abstrak. Papan partikel merupakan komposit yang tersusun dari filler (penguat) dan matriks (pengikat). Papan partikel dapat dibuat dari bahan limbah pertanian yang mengandung selulosa seperti tempurung kelapa. Penelitian ini menggunakan limbah tempurung kelapa sebagai filler dan resin epoksi (RE) sebagai matriks. Penelitian dilakukan dengan memvariasikan ukuran partikel tempurung kelapa (60, 80, 100 dan 120 mesh) dan komposisi filler tempurung kelapa:perekat RE (70:30, 75:25, 80:20, dan 85:15 vol.%) untuk memperoleh sifat mekanik yang terbaik. Sifat mekanik yang diuji adalah modulus of elasticity, modulus of rupture, dan kuat tekan. Sifat mekanik papan partikel diuji sesuai standar ASTM. Hasil penelitian menunjukkan bahwa sifat mekanik menurun dengan bertambahnya komposisi tempurung kelapa. Namun sifat mekanik meningkat dengan mengecilnya ukuran partikel dari 60 ke 120 mesh. Papan partikel yang dihasilkan memenuhi persyaratan ANSI untuk ukuran partikel 120 mesh, komposisi tempurung kelapa 80 vol.%, dan RE 20 vol.%.Abstract. Particle board is a composite composed of filler (reinforcement) and a matrix (binder). Particle board can be made of agricultural waste material containing cellulose such as a coconut shell. This study used coconut shell particles as a filler and epoxy resin (RE) as a matrix. The research was conducted by varying the particle size of coconut shells (60, 80, 100 and 120 mesh) and the composition of coconut shell fillers:RE adhesive (70:30, 75:25, 80:20, and 85:15 vol.%) to obtain the best mechanical properties. The mechanical properties tested were modulus of elasticity, modulus of rupture, and compressive strength. Particleboard was tested according to ASTM standards. The results showed that the mechanical properties decreased with increasing coconut shell composition. However, the mechanical properties increased as the particle size decreased from 60 to 120 mesh. The resulting particle board meets ANSI requirements for a particle size of 120 mesh, 80 vol.% of coconut shell composition, and 20 vol.% of RE. Keywords: Coconut Shell, Epoxy Resin, Mechanical Properties, Particle Board

scholarly journals Automobile Exhaust Removal Performance of Pervious Concrete with Nano TiO2 under Photocatalysis

Nanomaterials ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 2088
Author(s):  
Guobao Luo ◽  
Hanbing Liu ◽  
Wenjun Li ◽  
Xiang Lyu
Keyword(s):  
Particle Size ◽  
Redox Potential ◽  
Photocatalytic Performance ◽  
Tio2 Particle ◽  
Pervious Concrete ◽  
Distribution Area ◽  
Light Sources ◽  
Nano Tio2 ◽  
Automobile Exhaust ◽  
The Government

The urban environment is facing serious problems caused by automobile exhaust pollution, which has led to a great impact on human health and climate, and aroused widespread concern of the government and the public. Nano titanium dioxide (TiO2), as a photocatalyst, can be activated by ultraviolet irradiation and then form a strong REDOX potential on the surface of the nano TiO2 particles. The REDOX potential can degrade the automobile exhaust, such as nitrogen oxides (NOx) and hydrocarbons (HC). In this paper, a photocatalytic environmentally friendly pervious concrete (PEFPC) was manufactured by spraying nano TiO2 on the surface of it and the photocatalytic performance of PEFPC was researched. The nano TiO2 particle size, TiO2 dosage, TiO2 spraying amount, and dispersant dosage were selected as factors to investigate the efficiency of photocatalytic degradation of automobile exhaust by PEFPC. Moreover, the environmental scanning electron microscope (ESEM) was used to evaluate the distribution of nano TiO2 on the surface of the pervious concrete, the distribution area of nano TiO2 was obtained through Image-Pro Plus, and the area ratio of nano TiO2 to the surface of the pervious concrete was calculated. The results showed that the recommended nano TiO2 particle size is 25 nm. The optimum TiO2 dosage was 10% and the optimum dispersant dosage was 5.0%. The photocatalytic performance of PEFPC was best when the TiO2 spraying amount was 333.3 g/m2. The change in the photocatalytic ratio of HC and NOx is consistent with the distribution area of nano TiO2 on the surface of the pervious concrete. In addition, the photocatalytic performance of PEFPC under two light sources (ultraviolet light and sunlight) was compared. The results indicated that both light sources were able to stimulate the photocatalytic performance of PEFPC. The research provided a reference for the evaluation of automobile exhaust removal performance of PEFPC.

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