Improvement of the mechanical properties of a glass multifilament yarn reinforced ettringitic matrix using an innovative pre-impregnation process

2020 ◽  
pp. 1-16 ◽  
Author(s):  
O. Homoro ◽  
M. Michel ◽  
T. N. Baranger
Keyword(s):  
Mechanical Properties ◽  
Impregnation Process ◽  
Multifilament Yarn

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.

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.

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 Plywood Made from Plasma-Treated Veneers: Investigation of Performance Differences between Plasma-Pretreated and Untreated Beech Veneers at Comparable Melamine Resin Load

Forests ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1423
Author(s):  
Richard Wascher ◽  
Georg Avramidis ◽  
Wolfgang Viöl
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Bending Strength ◽  
Melamine Resin ◽  
Impregnation Process ◽  
Impregnation Time ◽  
Dipping Process ◽  
Resin Loading ◽  
Moduli Of Elasticity

In this study, the dimensional stability and mechanical properties of plywood made from untreated and plasma-pretreated beech veneers were compared. The wood veneers used (native and thermally modified) were impregnated with melamine resin in a simple dipping process prior to plywood production. The duration of the impregnation process was adjusted to give the same melamine resin loading for the different veneer types, with the plasma-pretreated veneers requiring only a fraction of the impregnation time compared with non-plasma-pretreated veneers. With comparable melamine loading, testing of the mechanical properties of the plywood for the different specimen collectives showed significant differences in some cases with respect to compressive strength, bending strength and tensile strength (with the associated moduli of elasticity). For example, it was shown that plywood made from plasma-pretreated native beech veneers shows an increase in bending strength of about 8%, and from plasma-pretreated and thermally modified beech veneers, there is an increase of about 10% compared to the reference.

Mechanical properties and fracture behaviour of agave fibers bio-based epoxy laminates reinforced with zinc oxide

2020 ◽  
pp. 152808372096568
Author(s):  
Mauricio Torres ◽  
Victoria Renteria Rodriguez ◽  
Perla Itzel Alcantara ◽  
Edgar Franco-Urquiza
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Fracture Behavior ◽  
Filler Content ◽  
Fracture Behaviour ◽  
Natural Fibers ◽  
Mode I ◽  
Resin Infusion ◽  
Impregnation Process ◽  
Low Concentrations

Biolaminates of Ixtle and Henequen natural fibers reinforced bio-based epoxy resin were prepared using Vacuum Assisted Resin Infusion process. ZnO nanoparticles were added to the bio-based epoxy resin at 1, 2 and 3 wt. % content before impregnation process. The viscoelastic and mechanical properties, as well as the fracture behavior, were evaluated and related to the nature of the fibers and filler content. The viscoelastic results indicated the ZnO particles are effective fillers just at low concentrations, and induce different reinforcement mechanisms attributed to the interaction between the nature of fibers and nanoparticles. The mechanical properties of the Ixtle biolaminates decreased at higher filler concentrations, while Henequen biolaminates showed better mechanical properties just above the 2 wt. % of ZnO. The fracture behavior in mode I registered moderate changes in toughness, related to the ZnO fraction, which promoted different behaviors on the interlaminar adherence of the layers. The results point to the need to continue evaluating the potential application of these green composites for their use in construction and automotive industries.

Electrical and mechanical properties of phenoxy/multiwalled carbon nanotubes multifilament yarn processed by melt spinning

2012 ◽  
Vol 82 (20) ◽  
pp. 2106-2115 ◽  
Author(s):  
Jonas Bouchard ◽  
Aurélie Cayla ◽  
Vincent Lutz ◽  
Christine Campagne ◽  
Eric Devaux
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Melt Spinning ◽  
Rheological Behaviour ◽  
Melt Flow Index ◽  
Flow Index ◽  
Electrical Measurements ◽  
Multiwalled Carbon ◽  
Multifilament Yarn

Nanocomposites based on Poly ((hydroxy ether) of bisphenol A) (Phenoxy) filled with multiwalled carbon nanotubes has been prepared by extrusion. Rheological behaviour and thermal degradation of these nanocomposites have been studied by melt flow index and thermogravimetric analysis. The results show that the addition of carbon nanotubes up to 2wt% increases the viscosity but does not modify significantly the spinnability of the compounds. Moreover, incorporation of these nanofillers allows an improvement of the thermal decomposition. In a second step, these nanocomposites have been processed by melt spinning to produce multifilament yarn. Transmission electron microscopy observations have been done to study carbon nanotubes dispersion and orientation. Nanocomposite morphology correlated with electrical measurements reveal an electrical percolation around 1.5 wt.% without decreasing significantly mechanical properties.

A Hot-Melt Thermosetting Phenolic Prepreg and its Composites

2010 ◽  
Vol 150-151 ◽  
pp. 1049-1053
Author(s):  
Bin Liang ◽  
Li Xin Chen ◽  
Jian Na Dong ◽  
Hui Xin Zhao ◽  
Feng Fei Liang
Keyword(s):  
Mechanical Properties ◽  
High Speed ◽  
Phenolic Resin ◽  
Reaction Process ◽  
Gel Properties ◽  
Impregnation Process ◽  
High Speed Trains ◽  
Melt Impregnation ◽  
Hot Melt

A novel phenolic resin suitable for hot-melt impregnation process was developed through copolymerization. The curing reactivity, gel properties and viscosity of the resin were tested to evaluate the resin reaction process. A prepreg of this resin and glass fabrics was developed with hot-melt process. The cured phenolic prepreg laminates havebalanced mechanical properties. It can be used to manufacture interior structures for airplanes and high-speed trains or other applications with flame retard requirement.

scholarly journals Pine wood modification via an antifungal oil – Heat treatment and its effect on annual wood rings

BioResources ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. 4731-4742
Author(s):  
Gonca Düzkale Sözbir ◽  
İbrahim Bektaş ◽  
Ayşenur Kiliç Ak ◽  
Saniye Erkan
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Antibacterial Properties ◽  
Physical And Mechanical Properties ◽  
Annual Number ◽  
Annual Rings ◽  
Combined Process ◽  
Impregnation Process ◽  
Thyme Oil ◽  
Wood Protection

Thyme oil, which is an anti-fungicide, was used to increase the physical and mechanical properties of wood as well as improve its strength, especially in outdoor conditions. For this purpose, Stone pine (Pinus pinea L.) wood samples classified according to the annual number of rings were exposed to either the impregnation process or the combined process, which was comprised of impregnation followed by heat treatment. As a result of the study, it was determined that the wood had different physical and mechanical properties based upon the number of annual rings. In addition, it was specified that the thyme oil used in the impregnation process improved the physical properties of the wood and also reduced the water absorption during the combined process. As a general conclusion, the impregnation process and the combined process increased the mechanical properties of the wood in parallel with an increase in the number of annual rings. The process of impregnation of wood materials with thyme oil is promising due to its anti-fungal and antibacterial properties, its ability to be used in small amounts in on-site impregnation, and it being an environmentally friendly product for the wood protection industry.

Phase Transformations in Ti-7w/oMo-3w/oMe Alloy

1974 ◽  
Vol 32 ◽  
pp. 514-515
Author(s):  
S. Fujishiro
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Transmission Electron Microscopy ◽  
Tensile Strength ◽  
Mechanical Processing ◽  
Ray Method ◽  
X Ray ◽  
Transmission Electron ◽  
Water Quench ◽  
Alpha Beta

The mechanical properties of three titanium alloys (Ti-7Mo-3Al, Ti-7Mo- 3Cu and Ti-7Mo-3Ta) were evaluated as function of: 1) Solutionizing in the beta field and aging, 2) Thermal Mechanical Processing in the beta field and aging, 3) Solutionizing in the alpha + beta field and aging. The samples were isothermally aged in the temperature range 300° to 700*C for 4 to 24 hours, followed by a water quench. Transmission electron microscopy and X-ray method were used to identify the phase formed. All three alloys solutionized at 1050°C (beta field) transformed to martensitic alpha (alpha prime) upon being water quenched. Despite this heavily strained alpha prime, which is characterized by microtwins the tensile strength of the as-quenched alloys is relatively low and the elongation is as high as 30%.

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