Influence of Organoclay on the Physical Properties of Polyethylene Nanocomposites

2006 ◽  
Vol 530-531 ◽  
pp. 709-714 ◽  
Author(s):  
Edcleide Maria Araújo ◽  
Amanda D. de Oliveira ◽  
Renata Barbosa ◽  
Tomás Jefférson Alves de Mélo
Keyword(s):  
Mechanical Properties ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Clay Nanocomposites ◽  
X Ray Diffraction ◽  
Polyethylene Matrix ◽  
X Ray ◽  
Ft Ir

In this work, polyethylene/montmorillonite clay nanocomposites were produced by melt intercalation. The clays were treated with quaternary ammonium salts and then treated and untreated clays were introduced in polyethylene. The clays were characterized by X-Ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FT-IR). The nanocomposites were characterized by mechanical and flammability properties. The results showed that the mechanical properties were improved by introduction of organoclay in polyethylene matrix. By adding only 3wt% montmorillonite, the burning rate of the nanocomposites was reduced by 17% in relation to PE matrix.

Physical Properties of Nylon 66/Organoclay Nanocomposites

2006 ◽  
Vol 530-531 ◽  
pp. 702-708 ◽  
Author(s):  
Edcleide Maria Araújo ◽  
K.D. Araujo ◽  
Taciana Regina de Gouveia Silva
Keyword(s):  
Mechanical Properties ◽  
Infrared Spectroscopy ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
X Ray Diffraction ◽  
Rheological Characterization ◽  
Nylon 66 ◽  
X Ray ◽  
Organically Modified

Nanocomposites containing nylon 66 and montmorillonite clay organically modified with quaternary ammonium salts were obtained via direct melt intercalation. A montmorillonite sample from Boa Vista/PB, Northeast of Brazil, was treated with three types of quaternary ammonium salts such as Genamin, Praepagen and Cetremide. After the treatment, the powder was characterized by X-ray diffraction (XRD). The produced nanocomposites were characterized by Torque Rheometer, Infrared Spectroscopy (FTIR), mechanical properties and HDT. The obtained results for rheological characterization showed that the nanocomposites did not present deterioration with the presence of modified clay. Generally, the mechanical properties of tensile of the systems presented superior values compared to that of pure Ny 66. HDT's properties presented very interesting values for the nanocomposites and significantly larger than for pure nylon 66.

Dissolution and Regeneration of Reed Leaf Fibers in Imidazole-Based Ionic Liquids

2013 ◽  
Vol 652-654 ◽  
pp. 1539-1542
Author(s):  
Hou Jie Zhao ◽  
Chun Yan Wei ◽  
Yong Zhu Cui ◽  
Li Hua Lv ◽  
Xiao Wang
Keyword(s):  
Fourier Transform ◽  
Ionic Liquids ◽  
Infrared Spectroscopy ◽  
Chloride Solution ◽  
X Ray Diffraction ◽  
Cellulose I ◽  
X Ray ◽  
High Temperature And Pressure ◽  
Ft Ir ◽  
Temperature And Pressure

In this paper, regeneration of reed leaf fibers that have been degummed pretreatment in high temperature and pressure dissolved in 1-butyl-3-methylimidazolium chloride ionic liquids was studied. The samples containing 5% or 10%(wt/wt)reed leaf fibers in the ionic liquids, at 90°C for 7h.The dissolution process was viewed by polarizing microscope. Fourier-transform infrared spectroscopy(FT-IR) and X-ray diffraction were used to visualize the crystalline of reed leaf fiber transformed completely from cellulose I to cellulose Ⅱ after regenerated directly from 1-butyl-3-methylimidazolium chloride solution.

scholarly journals Effect of Silica Addition on Mechanical Properties of Eggshell-Derived Hydroxyapatite

2021 ◽  
Vol 10 (2) ◽  
pp. 129-138
Author(s):  
. Fatma ◽  
. Desnelli ◽  
Fahma Riyanti ◽  
Mustafa Kamal ◽  
Muhammad Ramdan Abdul Mannan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Crystallite Size ◽  
Fourier Transform Infrared Spectroscopy ◽  
Biomedical Applications ◽  
X Ray Diffraction ◽  
X Ray ◽  
Silica Addition

Eggshell is a solid waste that is available in abundance but is being left unused. Eggshell containing calcium in a high amount. Calcium can be used as a precursor for hydroxyapatite (HAp). Modification of HAp with SiO2 is expected to improve its low mechanical properties for biomedical applications. In this study, HAp is synthesized from the eggshell. Then, it was modified by adding SiO2 utilizing the coprecipitation method with concentrations of 10%, 20%, 30%, and 40%, respectively. The HAp and HAp/SiO2 were characterized using; X-ray diffraction and Fourier transform infrared spectroscopy. The analysis HAp and HAp/SiO2 were density, compressive strength, and hardness. The best mechanical properties of HAp/SiO2 were characterized using SEM-EDS. The HAp were prepared successfully with a ratio of Ca/P was 1.673, close to the theoretical 1.67. The addition of SiO2 caused a decrease in crystallite size and density but increased compressive strength and hardness. The best mechanical properties of HAp/SiO2 were obtained with SiO2 of 30% and 40% with similar values.

scholarly journals Effects of removal of extractives on the chemical composition and mechanical properties of wood

BioResources ◽  
2020 ◽  
Vol 15 (4) ◽  
pp. 8631-8647
Author(s):  
Dongliang Zhao ◽  
Haibiao Yu ◽  
Xiuchun Bao ◽  
Jinwei Liu ◽  
Haoqiang Yuan ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Mechanical Properties ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Great Influence ◽  
Wood Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Extraction Treatment ◽  
Adsorption Of N2

Poplar and pine wood were extracted with water, 1% NaOH (wt%) solution, and benzene:ethanol solution (V1 : V2, 2 : 1) to investigate the governing factors and mechanism by which extractives affect wood structure and mechanical properties. The structure, pore distribution, crystal structure, and mechanical properties of samples were analyzed by Fourier transform infrared spectroscopy (FTIR), adsorption of N2 gas, X-ray diffraction (XRD), and mechanical testing, respectively. The results demonstrated that cellulose, hemicellulose, and lignin were degraded to some extent in the course of the dissolution of the extractives. This degradation had a great influence on the structure and quantity of pores. The extraction treatment did not change the crystallization type of the wood, but it increased the crystallinity of the wood, and the length and width of the crystallization area changed. In addition, the mechanical properties of wood were changed when the content of the extractives was reduced.

Tensile and flexural properties of Tampico fibres and E-glass fibre composites reinforced with epoxy resin

2021 ◽  
pp. 146442072110357
Author(s):  
T Narendiranath Babu ◽  
E Rajkumar ◽  
George George ◽  
Jefferson Jobai ◽  
D Rama Prabha
Keyword(s):  
Mechanical Properties ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Bending Strength ◽  
Lattice Structure ◽  
Natural Fibre ◽  
Flexural Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Fibre Composites

The focus of our study was to evaluate and compare the mechanical properties, namely tensile and bending strength of natural fibre composites. Natural fibre composites are composites consisting of fibres made from plants and animals. The natural fibre chosen for this study was Tampico fibre. The moulds were made according to ASTM D638 and D790 standards for both tensile and bending specimens. The first set of composites were arranged in three different orientations namely uniaxial, biaxial and criss-cross. The moulds were prepared using the hand-lay-up technique. These fibres were combined with Epoxy LY-556 pitch and Hardener HY-951 in a specific proportion to make the composite. The second set of composites included an additional variant in the form of biaxial E-glass fibres of 270GSM density, to compare the differences in the mechanical strength. The X-ray diffraction and Fourier-transform infrared spectroscopy were performed on the specimen to understand the lattice structure and prevalent bonds formed within the composites.

Optimization of ammonia nitrogen removal by SO42− intercalated hydrotalcite using response surface methodology

RSC Advances ◽  
2016 ◽  
Vol 6 (54) ◽  
pp. 48329-48335 ◽  
Author(s):  
Heng-Zhi Duan ◽  
Hong-Yan Zeng ◽  
Hua-Miao Xiao ◽  
Chao-Rong Chen ◽  
Gao-Fei Xiao ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Response Surface Methodology ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Ammonia Nitrogen ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir ◽  
Scanning Electron

SO42− intercalated Mg–Al hydrotalcite (S-LDH) was prepared under microwave irradiation and characterized by powder X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM).

scholarly journals Preparation of PEO/Clay Nanocomposites Using Organoclay Produced via Micellar Adsorption of CTAB

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Ahmet Gürses ◽  
Mehtap Ejder-Korucu ◽  
Çetin Doğar
Keyword(s):  
Mechanical Properties ◽  
Ir Spectra ◽  
Polyethylene Oxide ◽  
Clay Content ◽  
Ammonium Bromide ◽  
Clay Nanocomposites ◽  
X Ray Diffraction ◽  
X Ray ◽  
Basal Distance ◽  
Ft Ir

The aim of this study was the preparation of polyethylene oxide (PEO)/clay nanocomposites using organoclay produced via micellar adsorption of cethyltrimethyl ammonium bromide (CTAB) and their characterisation by X-ray diffraction (XRD), and Fourier transform infrared (FT-IR) spectra, and the investigation of certain mechanical properties of the composites. The results show that the basal distance between the layers increased with the increasing CTAB/clay ratio as parallel with the zeta potential values of particles. By considering the aggregation number of CTAB micelles and interlayer distances of organo-clay, it could be suggested that the predominant micelle geometry at lower CTAB/clay ratios is an ellipsoidal oblate, whereas, at higher CTAB/clay ratios, sphere-ellipsoid transition occurs. The increasing tendency of the exfoliation degree with an increase in clay content may be attributed to easier diffusion of PEO chains to interlayer regions. FT-IR spectra show that the intensity of Si-O stretching vibrations of the organoclays (1050 cm−1) increased, especially in the ratios of 1.0 g/g clay and 1.5 g/g clay with the increasing CTAB content. It was observed that the mechanical properties of the composites are dependent on both the CTAB/clay ratios and clay content of the composites.

Preparation of 2 wt% ZnFe2O4/HAp Ceramic for Future Biomedical Applications

2015 ◽  
Vol 804 ◽  
pp. 167-170
Author(s):  
Pattarinee Klumdoung ◽  
Piyapong Pankaew
Keyword(s):  
Composite Material ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Biomedical Applications ◽  
Stoichiometric Ratio ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir

In this study, 2 wt% ZnFe2O4/HAp ceramic was prepared to form a promising composite material for future biomedical applications. Firstly, HAp powder was synthesized by precipitation using Ca(NO3)2 as the Ca source, (NH4)2HPO4 as the P source and ammonia as a pH adjuster. To prepare 2 wt% of ZnFe2O4, ZnO and Fe2O3 powders were mixed in ethanol with sequent dehydration and then calcination (using stoichiometric ratio). Finally, 2 wt% of ZnFe2O4 powder was milled with 98 wt% of HAp powder for 10 minutes before uniaxial pressing and then sintering at 1200 °C for 3 hours to form 2 wt% ZnFe2O4/HAp ceramic. The prepared ceramic was characterized by X- ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and vibrating sample magnetometer (VSM). The XRD results revealed the ZnFe2O4/HAp ceramic with only HAp and ZnFe2O4 phases obtained, indicating that no impurities phases occurred. The FT-IR results revealed vibration bands of standard HAp and indicated the interaction between ZnFe2O4 and HAp. For the VSM results, the magnetization of composite was 0.05 emu/g and its coercivity was 44 Oe. These results could lead us to the development of a method for ZnFe2O4/HAp ceramic optimized for specific biomedical applications.

scholarly journals Synthesis of NiO nanoparticles by sol-gel technique

2018 ◽  
Vol 36 (4) ◽  
pp. 547-552 ◽  
Author(s):  
Zohra Nazir Kayani ◽  
Mahek Zaheen Butt ◽  
Saira Riaz ◽  
Shahzad Naseem
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Crystallite Size ◽  
Fourier Transform Infrared Spectroscopy ◽  
Sol Gel ◽  
Fourier Transform Infrared ◽  
Nio Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir

AbstractNiO nanoparticles were fabricated by sol-gel route using ammonium hydroxide and nickel nitrate as precursors. The NiO nanoparticles were calcinated at 400 °C and 1000 °C. The nanoparticles were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), vibrating sample magnetometer (VSM), thermogravimetry analysis/differential thermal analysis (TGA/DTA). The structural properties were evaluated by X-ray diffraction (XRD). XRD confirmed the formation of well-crystallized and high purity NiO phase. The XRD showed that the peaks were sharpened and the crystallite size increased as the calcination temperature increased. The average crystallite size ranged from 12 nm to 20 nm, when calcined at temperatures 400 °C and 1000 °C, respectively. Fourier transform infrared spectroscopy (FT-IR) revealed the chemical composition and confirmed the formation of NiO nanoparticles. The nanoparticles showed paramagnetic behavior.

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