CdS-silica xerogel nanocomposites: Processing-induced textural changes

1994 ◽  
Vol 9 (11) ◽  
pp. 2873-2877 ◽  
Author(s):  
E. Blanco ◽  
R. Litrán ◽  
M. Ramírez-del-Solar ◽  
N. de la Rosa-Fox ◽  
L. Esquivias
Keyword(s):  
Mechanical Properties ◽  
Salt Content ◽  
Gas Diffusion ◽  
Silica Xerogel ◽  
Acidic Water ◽  
Impregnation Process ◽  
Nanocrystal Growth ◽  
Textural Parameters ◽  
Textural Changes ◽  
Composite Protection

CdS-silica xerogel composites were prepared from tetramethoxysilane, acidic water, and formamide mixtures homogenized by high power ultrasounds. Different concentrations of Cd(NO3)2 were added. CdS semiconductor nanoparticles were precipitated by H2S gas diffusion through the sonogel porous structure. Composite mechanical properties were enhanced by an impregnation process by the gel soaking in the same sol as-prepared. Textural parameters evolution is compared to the salt content in order to find the best performance to CdS nanocrystal growth. The impregnation process allows a better composite protection.

scholarly journals CRUDE CATHEPSIN ACTIVITY AND QUALITY CHARACTERISTIC OF SMOKED CATFISH [Pangasius pangasius (Hamilton, 1882)] PROCESSED BY DIFFERENT SMOKING TEMPERATURE

2016 ◽  
Vol 78 (4-2) ◽  
Author(s):  
Fronthea Swastawati ◽  
Ahmad Ni’matullah Al Baarri ◽  
Tri Winarni Agustini ◽  
Eko Nurcahya Dewi ◽  
Ima Wijayanti ◽  
...  
Keyword(s):  
Moisture Content ◽  
Ph Value ◽  
Protein Solubility ◽  
Salt Content ◽  
Quality Characteristic ◽  
Cathepsin Activity ◽  
Textural Changes

The aim of this research was to investigate the effect of smoking temperature towards crude cathepsin activity and quality characteristic of smoked catfish [Pangasius pangasius (Hamilton, 1882)]. Different smoking temperature had  significant  effect (p < 0.05) on crude cathepsin activity, texture, pH, moisture content, salt content and protein solubility. The significant decreasing (30.13 %) of crude cathepsin activity was at P3 (80 °C) from P1 (40 °C to 50 °C). Many factors were correlated to the textural changes of smoked catfish such as changes of crude cathepsin activity, reduction of protein solubility and pH value. 

Effect of SNCR on the Properties of Fly Ash in Terms of its Applicability to Concrete

2018 ◽  
Vol 272 ◽  
pp. 107-114 ◽  
Author(s):  
Rudolf Hela ◽  
Martin Ťažký
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Fly Ash ◽  
Nitrogen Oxide ◽  
Catalytic Reduction ◽  
Salt Content ◽  
Reduction Process ◽  
Efficiency Index ◽  
Negative Impacts ◽  
The Impact

At the beginning of 2016, the legislation for regulating and reducing the emission of exhaust gases with regard to reducing nitrogen oxides came into force. The articles published to date point to the possibility of increased ammonium salt content in fly ash that has undergone a selective non-catalytic reduction process. This paper addresses other possible negative impacts of the reduction process for nitrogen oxide on the physico-mechanical properties of high-temperature fly ash, especially the morphology of its grains and its impact on the rheology of the composite and the impact on the efficiency index.

Effect of Impregnation Process Parameters on the Mechanical Properties of Carbon Fabric Reinforced Thermoplastic Composites

2020 ◽  
Vol 858 ◽  
pp. 78-83
Author(s):  
Dae Won Kim ◽  
Jun Park ◽  
Chul Kyu Jin ◽  
Hyung Yoon Seo ◽  
Chung Gil Kang
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Carbon Fiber ◽  
Process Parameters ◽  
Polymeric Materials ◽  
Thermoplastic Composite ◽  
Thermoplastic Composites ◽  
Body Parts ◽  
Carbon Fabric ◽  
Impregnation Process

Carbon fabric-reinforced thermoplastic (CFRP) composites, fortified with carbon fiber prepreg and epoxy base materials, have been mainly used for body parts for weight lightening, advanced high strength, and impact absorption In the current automotive industry However, as recycling of the composite material is required, attempts have been made to manufacture body parts using a thermoplastic polymeric material as a base substance. In order to produce various types of body parts by impregnating a liquid thermoplastic material into carbon fabric preform in methods of manufacturing a carbon fiber-reinforced thermoplastic composite material (CFRTP), it is important to understand the effect of the impregnation process parameters (time, temperature, pressing force) on the mechanical properties of the composite material. Therefore, in this study, the influence of impregnation process parameters on the mechanical properties of CFRTP is proposed. In addition, this paper presents the problems and solutions when polymeric materials are impregnated in carbon fabric.

The Effect of Impregnation Process on the Performance of Veneer Composite Plank

2011 ◽  
Vol 239-242 ◽  
pp. 2411-2414
Author(s):  
Xing Zhen ◽  
Jiu Yin Pang ◽  
Shi Cheng Zhang ◽  
Ya Zhe Jiang
Keyword(s):  
Mechanical Properties ◽  
Drug Absorption ◽  
Modulus Of Elasticity ◽  
Absorption Rate ◽  
Normal Pressure ◽  
Modulus Of Rupture ◽  
Impregnation Process ◽  
Impregnation Time ◽  
Peak Value

This study focuses on the effect of impregnation process on the main mechanical properties in the production of veneer composite plank. The results showed that:①Under the normal pressure and temperature the drug absorption of impregnated veneer shall extend the volume with the growth in impregnation time, but growing faster early, the later change slowly. In the impregnation process under pressure, its absorption rate and speed are greatly increased. ②The Modulus of rupture (MOR) and modulus of elasticity (MOE) of veneer composite plank are gradually increased with the drug absorption increased, but after reached a certain peak value they gradually decrease, and the variation of MOE is smaller than MOR.

Preparation and Mechanical Properties of a Novel Biomedical Magnesium-Based Scaffold

2013 ◽  
Vol 544 ◽  
pp. 276-280 ◽  
Author(s):  
Xue Zhang ◽  
Xiao Wu Li ◽  
Ji Guang Li ◽  
Xu Dong Sun
Keyword(s):  
Mechanical Properties ◽  
Bone Substitute ◽  
Layer Structure ◽  
Salt Content ◽  
Current Method ◽  
Mechanical Tests ◽  
Compact Structure ◽  
Biodegradable Metal ◽  
Powder Metallurgical Process ◽  
Structural Characterizations

Magnesium has been recently recognized as a biodegradable metal for bone substitute applications. In the present work, a novel magnesium based scaffold with a specific two-layer structure was prepared for powder metallurgical process. The outer layer of the scaffold shows an interconnected porous structure, so that the fresh fluid can be easily sent into the material, allowing the ingrowth of new bone tissue. The inner compact structure reinforced by the salt particles can increase the strength of the material. Structural characterizations and mechanical tests of the materials demonstrate that the structural and mechanical properties of the magnesium-based scaffold with an appropriate salt content prepared by the current method are quite comparable to those of cancellous bone. Therefore, the magnesium-based scaffold with such a two-layer structure has the potential to serve as degradable implants for bone substitute applications.

scholarly journals Obtaining Active Polylactide (PLA) and Polyhydroxybutyrate (PHB) Blends Based Bionanocomposites Modified with Graphene Oxide and Supercritical Carbon Dioxide (scCO2)-Assisted Cinnamaldehyde: Effect on Thermal-Mechanical, Disintegration and Mass Transport Properties

Polymers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3968
Author(s):  
Carolina Villegas ◽  
Alejandra Torres ◽  
Julio Bruna ◽  
María Ignacia Bustos ◽  
Alvaro Díaz-Barrera ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Dioxide ◽  
Graphene Oxide ◽  
Supercritical Carbon Dioxide ◽  
Mass Transport ◽  
Transport Properties ◽  
Active Compound ◽  
Supercritical Co2 ◽  
Impregnation Process ◽  
Elongation Percentage

Bionanocomposites based on Polylactide (PLA) and Polyhydroxybutyrate (PHB) blends were successfully obtained through a combined extrusion and impregnation process using supercritical CO2 (scCO2). Graphene oxide (GO) and cinnamaldehyde (Ci) were incorporated into the blends as nano-reinforcement and an active compound, respectively, separately, and simultaneously. From the results, cinnamaldehyde quantification values varied between 5.7% and 6.1% (w/w). When GO and Ci were incorporated, elongation percentage increased up to 16%, and, therefore, the mechanical properties were improved, with respect to neat PLA. The results indicated that the Ci diffusion through the blends and bionanocomposites was influenced by the nano-reinforcing incorporation. The disintegration capacity of the developed materials decreased with the incorporation of GO and PHB, up to 14 and 23 days of testing, respectively, without compromising the biodegradability characteristics of the final material.

On Crystallographic Texture of As-Drawn Doped-W Wires

2005 ◽  
Vol 495-497 ◽  
pp. 913-918 ◽  
Author(s):  
S.K. Yerra ◽  
Bert Verlinden ◽  
Paul van Houtte
Keyword(s):  
Mechanical Properties ◽  
Mechanical Behaviour ◽  
Crystallographic Texture ◽  
Deformation Zone ◽  
Room Temperature ◽  
Volume Fraction ◽  
Wire Diameter ◽  
Texture Characteristics ◽  
The Wire ◽  
Textural Changes

Industrially processed doped-tungsten wires in the as-drawn condition have essentially a <110>-fibre texture with attractive mechanical properties. The main objectives of the present work are to investigate (I) if any textural changes occur as the wire diameter decreases and (II) if such changes influence the mechanical behaviour of the wire. A wire of about ∅1.5mm is drawn to about ∅0.15mm following a standard industrial route and samples were collected from five intermediate drawing passes. Bulk texture measurements using X-radiations were then carried on the transverse sections of the wires and texture characteristics such as volume fraction of textural components and sharpness index were quantified with respect to the wire diameter. It was observed that the texture in the as-drawn wires remains chiefly the same <110>-fibre as the wire diameter decreases. However, the sharpness of texture reaches a maximum at a certain diameter and decreases with further decrease in the wire diameter. An explanation is offered based on the concept of deformation zone geometry. An attempt was also made to determine if texture weakening has any effect on the mechanical properties of the wire at room temperature.

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