scholarly journals Investigation of the Thermo-Mechanical Properties of Blend Films Based on Hemicelluloses and Cellulose

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
Hui Gao ◽  
Jun Rao ◽  
Ying Guan ◽  
Wen-qi Li ◽  
Mao-chao Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Testing ◽  
Electrostatic Interactions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Blend Films ◽  
Structural Relationships ◽  
Structures And Properties ◽  
Convenient Approach ◽  
Hydrogen Bondings

This study presents an effective and convenient approach to prepare blend films with enhanced mechanical and thermodynamic properties by incorporation of carboxymethyl cellulose (CMC) into quaternized hemicelluloses (QH). The structures and properties of films were analyzed by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and tensile testing, respectively. From the SEM pictures, tight, homogeneous, and smooth surfaces of films were obtained. In addition, the transparencies of the blend films were increased with the increasing of CMC content. The results of mechanical properties indicated that the blend film prepared from QH and CMC (1 : 2 m/m) had a tensile strength of 65.2 MPa. It suggested that the addition of CMC was contributed to mechanical properties by strong electrostatic interactions and the enhanced hydrogen bondings with QH. These results provide insights into the understanding of the structural relationships of bioblend films in coating and packaging application.

Effect of AlN on Microstructure and Mechanical Properties of Mg-Al-Zn Alloy

2011 ◽  
Vol 704-705 ◽  
pp. 1095-1099
Author(s):  
Peng Liu ◽  
Hao Ran Geng ◽  
Zhen Qing Wang ◽  
Jian Rong Zhu ◽  
Fu Sen Pan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Tensile Strength ◽  
Tensile Testing ◽  
Cast Alloy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Β Phase ◽  
Microstructure And Mechanical Properties ◽  
Zn Alloy

Effects of AlN addition on the microstructure and mechanical properties of as-cast Mg-Al-Zn magnesium alloy were investigated using optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD) and tensile testing. Five different samples were made with different amounts of AlN(0wt%, 0.12wt%, 0.30wt%, 0.48wt%, 0. 60wt%). The results show that the phases of as-cast alloy are composed of α-Mg,β-Mg17Al12. The addition of AlN suppressed the precipitation of the β-phase. And, with the increase of AlN content, the microstructure of β-phase was changed from the reticulum to fine grains. When AlN content was up to 0.48wt% in the alloy, the β-phase became most uniform distribution. After adding 0.3wt% AlN to Al-Mg-Zn alloy, the average alloy grain size reduced from 102μm to 35μm ,the tensile strength of alloy was the highest. The average tensile strength increased from 139MPa to 169.91MPa, the hardness increased from 77.7HB to 98.4HB, but the elongation changes indistinctively. However, when more amount of AlN was added, the average alloy grain size did not reduce sequentially and increased to 50μm by adding 0.6wt% AlN and the β-phase became a little more. Keywords: Al-Mg-Zn alloy; AlN; β-Mg17Al12; Tensile strength

Effect of the Ratio of Zn/Y on Microstructure and Mechanical Properties of As-Cast Mg-4Zn-xY Alloys

2013 ◽  
Vol 395-396 ◽  
pp. 201-204
Author(s):  
Feng Wang ◽  
Ji Bao Li ◽  
Ping Li Mao ◽  
Zheng Liu
Keyword(s):  
Mechanical Properties ◽  
Tensile Testing ◽  
Energy Dispersive Spectrum ◽  
X Ray Diffraction ◽  
Scanning Electronic Microscopy ◽  
Electronic Microscopy ◽  
X Ray ◽  
Uniformity Coefficient ◽  
Microstructure And Mechanical Properties ◽  
Second Phases

In order to investigate the ratio of Zn/Y on as-cast Mg-4Zn-xY (x=1, 2, 3 in wt. %), microstructure and mechanical properties are analyzed by scanning electronic microscopy (SEM), X-ray diffraction (XRD), energy dispersive spectrum (EDS) and tensile testing. The results indicate that with the decrease of the ratio of Zn/Y, microstructures are refined more greatly and the spheroidization and uniformity coefficient are improved obviously, and the morphologies of second phases are changed from diversity to unity, resulting in an improvement of mechanical properties of alloys.

Preparation of Transparent Water-Insoluble Silk Fibroin Films

2011 ◽  
Vol 175-176 ◽  
pp. 79-84
Author(s):  
Min Qing Luo ◽  
Cen Cen Zhang ◽  
Shen Zhou Lu
Keyword(s):  
Mechanical Properties ◽  
Silk Fibroin ◽  
Light Transmittance ◽  
Human Cornea ◽  
X Ray Diffraction ◽  
X Ray ◽  
Blend Films ◽  
Structure Surface ◽  
Ft Ir ◽  
Transparent Water

The transparent water-insoluble silk fibroin(SF) films were casted from the mixture solution of silk fibroin and xylitol/mannitol. The structure, surface morphology, solubility, mechanical properties and light transmittance of the blend films were measured. FT-IR, X-ray diffraction retuslts indicated that the films were mainly composed of Silk I structure. SEM showed the blend films with xylitol were miscible, whereas the blend films with mannitol had phase-separated structure. There were lots of nanopores in the blend films in the wet state. The insoluble SF /xylitol films had excellent mechanical properties while the SF / mannitol films were brittle. The mechanical property of SF/alcohol blend films were consistent with the human cornea in wet state.When the contents of xylitol were 10% and 20%, the blend films had high light transmittance which were similar to human cornea. In summary, the SF /xylitol film containing 10% xylitol provides a great potential to act as repairing materials for cornea.

Mechanical Properties of Thin Films and Nanometric Multilayers Using Tensile Testing and Synchrotron X-Ray Diffraction

2007 ◽  
Vol 4 (3) ◽  
pp. 311-317 ◽  
Author(s):  
Eric Le Bourhis ◽  
Damien Faurie ◽  
Baptiste Girault ◽  
Philippe Goudeau ◽  
Pierre-Olivier Renault ◽  
...  
Keyword(s):  
Thin Films ◽  
Mechanical Properties ◽  
Tensile Testing ◽  
X Ray Diffraction ◽  
X Ray

Effect of Mica Content on Mechanical Properties of Regenerated Cellulose Nanocomposites via Ionic Liquids

2015 ◽  
Vol 1112 ◽  
pp. 393-396
Author(s):  
Nurbaiti Abdul Hanid ◽  
Mat Uzir Wahit ◽  
Qi Peng Guo
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Tensile Testing ◽  
Mechanical Stability ◽  
Layered Silicate ◽  
Regenerated Cellulose ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cellulose Nanocomposites ◽  
Scanning Electron

A series of regenerated cellulose (RC) nanocomposites which were incorporated with the layered silicate mica were successfully prepared via ionic liquid. The effect of the mica loadings was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The mechanical properties which were investigated via tensile testing indicated that upon the introduction of the mica displayed a significant enhancement on the mechanical stability of the RC. The results showed the potential of mica to reinforce the RC polymers matrix.

scholarly journals Selective Laser Melting of Ti6Al4V-2%Hydroxyapatite Composites: Manufacturing Behavior and Microstructure Evolution

Metals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1295
Author(s):  
Hassanen Jaber ◽  
János Kónya ◽  
Tünde Anna Kovács
Keyword(s):  
Mechanical Properties ◽  
Tensile Properties ◽  
Selective Laser Melting ◽  
Tensile Testing ◽  
X Ray Diffraction ◽  
Laser Melting ◽  
Biological Fixation ◽  
X Ray ◽  
Composites Manufacturing ◽  
Scanning Electron

In this work, selective laser melting of Ti6Al4V (Ti64) and 2 wt.% hydroxyapatite (HA) composites was performed with the purpose of osseointegration enhancement and biological fixation between implants and bone tissue. The microstructural evolution and mechanical properties were analyzed by using X-ray diffraction (XRD), optical microscopy (OM), a scanning electron microscope (SEM) equipped with (EDX) and (EBSD) systems, microhardness, nanoindentation, and tensile testing. The results showed that the Ti64-2%HA composite components exhibited complicated manufacturing behavior, which could be correlated with the decomposition of HA. The microstructure was found to mainly consist of α Ti with a small amount of HA distributed along grain boundaries. Furthermore, the interaction between Ti64 and HA leading to the formation of Ti3P, TixO, P, and CaTiO3 phases, resulted in poor tensile properties, as compared to pure Ti64 components. Conversely, the tensile properties of SLM Ti64-2%HA composite components were significantly higher than human bone reported previously in the literature.

scholarly journals Efficient and Low-Cost Removal of Methylene Blue using Activated Natural Kaolinite Material

2021 ◽  
Vol 1 (2) ◽  
pp. 69-77
Author(s):  
Christyowati Primi Sagita ◽  
Limpat Nulandaya ◽  
Yehezkiel Steven Kurniawan
Keyword(s):  
Methylene Blue ◽  
Electrostatic Interactions ◽  
Adsorption Mechanism ◽  
Low Cost ◽  
Langmuir Model ◽  
X Ray Diffraction ◽  
Adsorption Experiment ◽  
Methylene Blue Adsorption ◽  
X Ray ◽  
Hydrogen Bondings

Clays are low-price and very useful material for water treatment purpose. In this work, we reported the application of activated natural kaolinite material which obtained from Wediombo beach, Yogyakarta for methylene blue adsorption. The natural kaolinite material was activated under an acidic condition to obtain the activated kaolinite material. The activated kaolinite material was characterized using Fourier transform infrared, X-ray diffraction, scanning electron microscope, and surface analysis. From the adsorption experiment, the activated kaolinite material gave moderate adsorption percentages for methylene blue. The adsorption kinetics followed the Ho and McKay kinetic model while the adsorption isotherm followed Langmuir model. The qmax value for methylene blue adsorption using activated natural kaolinite material was at a moderate level (3.40 mg g-1). The plausible adsorption mechanism of methylene blue on the surface of activated kaolinite material happened through hydrogen bondings and/or electrostatic interactions. These findings are important for a wastewater treatment using a low-cost adsorbent material.

scholarly journals STRUCTURES AND PROPERTIES OF NATURAL RUBBER/ORGANOCLAY NANOCOMPOSITES

2011 ◽  
Vol 14 (1) ◽  
pp. 30-38
Author(s):  
Hien Quang Pham ◽  
Son Thanh Thanh Do ◽  
Nieu Huu Nguyen
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Tensile Strength ◽  
Natural Rubber ◽  
Abrasion Resistance ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structures And Properties ◽  
Scanning Electron

Natural rubber (NR), 30% epoxidized natural rubber (ENR30) and organoclays (Nanomer I28E and I30E) are blended in Brabender. Dispersions of the organoclay in NR are investigated by X – ray diffraction (XRD) and scanning electron microscopy (SEM). The results revealed the increase of dispersion efficiency by the addition of ENR30 as a compatibilizer. The existence of organoclay I28E reduces the vulcanization time, while torque value increases slightly and mechanical properties (abrasion resistance, modulus M100, modulus M300, tensile strength, tear strength) are improved considerably.

Effect of Exercising Pressure during Solid Solution on Microstructure and Mechanical Properties of AM60 Magnesium Alloy

2012 ◽  
Vol 182-183 ◽  
pp. 311-314
Author(s):  
Wen Yan Duan
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Tensile Testing ◽  
Optical Microscope ◽  
Percentage Reduction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Elongation Percentage ◽  
Reduction Of Area ◽  
Microhardness Tester

As-cast AM60 magnesium alloy was solid dissolved with exercising different pressures to it. The microstructure of the products was characterized by optical microscope and X-ray diffraction. The mechanical properties of the products were investigated by microhardness tester and tensile testing. The results show that increasing the exercising pressure promotes the fracture and dissolution into the α-Mg matrix of the coarse β-Mg17Al12 phases distributed along the grain boundaries with a network appearance. With increasing the exercising pressure, the tensile strength, elongation percentage and percentage reduction of area of the alloy significantly increase, but its microhardness decreases.

Mechanical properties of FeAlSi powders prepared by mechanical alloying from different initial feedstock materials

2019 ◽  
Vol 107 (2) ◽  
pp. 207 ◽  
Author(s):  
Jaroslav Čech ◽  
Petr Haušild ◽  
Miroslav Karlík ◽  
Veronika Kadlecová ◽  
Jiří Čapek ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Alloying ◽  
Young’S Modulus ◽  
Milling Time ◽  
Young's Modulus ◽  
Element Model ◽  
X Ray Diffraction ◽  
X Ray ◽  
Powder Particles ◽  
Complete Homogenization

FeAl20Si20 (wt.%) powders prepared by mechanical alloying from different initial feedstock materials (Fe, Al, Si, FeAl27) were investigated in this study. Scanning electron microscopy, X-ray diffraction and nanoindentation techniques were used to analyze microstructure, phase composition and mechanical properties (hardness and Young’s modulus). Finite element model was developed to account for the decrease in measured values of mechanical properties of powder particles with increasing penetration depth caused by surrounding soft resin used for embedding powder particles. Progressive homogenization of the powders’ microstructure and an increase of hardness and Young’s modulus with milling time were observed and the time for complete homogenization was estimated.

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