Thermal Characterization of Polyester Composites Reinforced with Ramie Fibers

2014 ◽  
Vol 775-776 ◽  
pp. 272-277 ◽  
Author(s):  
Sergio Neves Monteiro ◽  
Frederico Muylaert Margem ◽  
Alice Bevitori ◽  
Isabela Leão Amaral da Silva ◽  
Michel Picanço Oliveira
Keyword(s):  
Low Cost ◽  
Physical And Mechanical Properties ◽  
Thermal Characterization ◽  
Ramie Fiber ◽  
Lignocellulosic Fibers ◽  
Ramie Fibers ◽  
Polyester Composites ◽  
Tg And Dtg ◽  
Increasing Temperature

Polyester composites reinforced with natural lignocellulosic fibers have attracted interest in several engineering areas due to their low cost, low energy consumption during fabrication in association with a number of possible applications. One of these applications is the replacement of traditional composites such as the fiberglass. Characterization of polyester composites incorporated with ramie fiber has recently been conducted for physical and mechanical properties. However, the effect of increasing temperature on these composites has not yet been fully investigated. Therefore, the objective of this study was to evaluate the thermogravimetric behavior of polyester composites reinforced with up to 30 vol% of ramie fibers. The analysis was conducted by TG and DTG techniques. The presence of ramie fibers induces sensible changes in the thermal stability of the polyester composites, showing a significant effect of the ramie fibers by reducing their temperatures of degradation.

Characterization of particleboard made from oil heat-treated rubberwood particles at different mixing ratios

BioResources ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 6795-6810
Author(s):  
Nurul Fatiha Osman ◽  
Paimon Bawon ◽  
Seng Hua Lee ◽  
Pakhriazad Hassan Zaki ◽  
Syeed SaifulAzry Osman Al-Eldrus ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Oil Content ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Thermal Characterization ◽  
High Dimensional ◽  
Mixing Ratios ◽  
Uf Resin ◽  
Heat Treated

Particleboard was produced by mixing oil heat-treated rubberwood particles at different ratios, with the goal of achieving high dimensional stability. Rubberwood particles were soaked in palm oil for 2 h and heat treated at 200 °C for 2 h. The treated particles were soaked in boiling water for 30 min to remove oil and were tested for chemical alteration and thermal characterization via Fourier-transform infrared spectroscopy and thermogravimetric analysis. Particleboard was fabricated by mixing treated rubberwood particles (30%, 50%, and 70%) with untreated particles (70%, 50%, and 30%, respective to previous percentages) and bonded with urea-formaldehyde (UF) resin. The results revealed that oil-heat treated particles had greater thermal stability than the untreated particles. The addition of oil heat treated particles improved the physical properties of the particleboard with no significant reduction in mechanical strength. However, this was only valid for ratios of 70% untreated to 30% treated and 50% untreated to 50% treated. When a ratio of 70% oil heat treated particles was used, both the physical and mechanical properties were reduced drastically, due to bonding interference caused by excessive oil content. Particleboard made with a ratio of 5:5 (treated to untreated) exhibited the best physical and mechanical properties.

Low-cost optical instrumentation for thermal characterization of MEMS

2005 ◽  
Vol 16 (9) ◽  
pp. 1833-1840 ◽  
Author(s):  
S Jorez ◽  
J Laconte ◽  
A Cornet ◽  
J-P Raskin
Keyword(s):  
Low Cost ◽  
Thermal Characterization ◽  
Optical Instrumentation

scholarly journals MECHANICAL, MORPHOLOGICAL AND THERMAL CHARACTERIZATION OF HYBRID BAMBOO/GLASS FIBER REINFORCED POLYESTER COMPOSITES

2018 ◽  
Vol 11 (3) ◽  
pp. 990-998 ◽  
Author(s):  
Bino Prince Raja D ◽  
B. Stanly Jones Retnam ◽  
Antony Samuel Prabu G ◽  
Alagu Sundaram A.
Keyword(s):  
Glass Fiber ◽  
Thermal Characterization ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
Polyester Composites

Thermal Photoacoustic Characterization of Polyester Composites Reinforced Ramie Fibers

2014 ◽  
pp. 507-513
Author(s):  
Caroline Gomes de Oliveira ◽  
Alice Barreto Bevitori ◽  
Isabela Leão Amaral da Silva ◽  
Frederico Muylaert Margem ◽  
Giulio Rodrigues Altoé ◽  
...  
Keyword(s):  
Ramie Fibers ◽  
Polyester Composites

Flexural Mechanical Characterization of Polyester Composites Reinforced with Ramie Fibers

2016 ◽  
pp. 385-390
Author(s):  
Lucas Almeida de Pontes ◽  
Pedro Amoy Netto ◽  
Jordana B. Ferreira ◽  
Frederico Muylaert Margem ◽  
Sergio N. Monteiro
Keyword(s):  
Mechanical Characterization ◽  
Ramie Fibers ◽  
Polyester Composites

Characterization of Raw and Treated Curaua Fibers to be Applied as Reinforcement in Composites

2012 ◽  
Vol 730-732 ◽  
pp. 283-288
Author(s):  
Ana.L.F.S. d'Almeida ◽  
João A. Melo Filho ◽  
José R.M. d'Almeida
Keyword(s):  
Mechanical Properties ◽  
Low Cost ◽  
Surface Characteristics ◽  
Surface Modifications ◽  
Deformation Capacity ◽  
Synthetic Fibers ◽  
Lignocellulosic Fibers ◽  
Curaua Fibers ◽  
Weibull Statistical Distribution

Lignocellulosic fibers present several advantages over synthetic fibers, such as low cost and biodegradability. In this work the tensile mechanical behavior of as-received and surface treated curaua fibers was analyzed. Mercerization and three different enzyme surface treatments were used. The tensile stress data were analyzed using the Weibull statistical distribution, and SEM was used to characterize the surface modifications caused by the treatments. The results show that mercerization causes an increase of the deformation capacity of the fibers. This result was attributed to the removal of hemicellulose, and to an increase of mobility of the internal fibrils. The increase of NaOH concentration at the alkali solution affects both the surface characteristics and the tensile properties. Solutions with more than 5%wt NaOH degraded the fibers. The enzyme treatments increase the tensile mechanical properties, but also increase their brittleness.

Flexural Mechanical Characterization of Polyester Composites Reinforced with Ramie Fibers

2016 ◽  
pp. 385-390
Author(s):  
Lucas de Almeida Pontes ◽  
Pedro Amoy Netto ◽  
Jordana B. Ferreira ◽  
Frederico Muylaert Margem ◽  
Sergio N. Monteiro
Keyword(s):  
Mechanical Characterization ◽  
Ramie Fibers ◽  
Polyester Composites

scholarly journals Characterization of textile-grade carbon fiber polypropylene composites

2020 ◽  
pp. 096739112093010 ◽  
Author(s):  
Pritesh Yeole ◽  
Shailesh Alwekar ◽  
N Krishnan P Veluswamy ◽  
Surbhi Kore ◽  
Nitilaksha Hiremath ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Low Cost ◽  
Length Distribution ◽  
Thermal Characterization ◽  
Polypropylene Composites ◽  
Fiber Length Distribution ◽  
Twin Screw ◽  
Good Potential ◽  
The Impact

In this work, we consider low-cost carbon fiber produced with a textile-grade precursor. The objective of the study is to investigate textile-grade carbon-fiber-reinforced-polypropylene composites (TCF-PP) from compounded pellets for mechanical and thermal characterization. Four sets of pellets with 1%, 5%, 10%, and 15% reinforcement were manufactured using textile-grade carbon fiber (TCF) and polypropylene (PP) by twin-screw compounding. The addition of TCFs through gravimetric feeder directly in the extruder resulted in lower fiber content; however, side feeder has shown good potential. The pellets were further processed in extrusion compression molding to manufacture plaques. An increase in fiber loading has a negligible effect on fiber attrition as fiber length distribution variation between 1% and 15% reinforced pellets was very small. The addition of TCFs in PP showed a significant improvement in mechanical properties. The tensile strength and modulus of the composite were 26% and 161%, respectively, improved by the addition of 10 wt% TCF. Similar results were observed in the flexure test. However, the impact properties were reduced by 25.54% by the addition of 15% TCF.

scholarly journals Thermal Characterization of New 3D-Printed Bendable, Coplanar Capacitive Sensors

Sensors ◽  
2021 ◽  
Vol 21 (19) ◽  
pp. 6324
Author(s):  
Mattia Alessandro Ragolia ◽  
Anna M. L. Lanzolla ◽  
Gianluca Percoco ◽  
Gianni Stano ◽  
Attilio Di Nisio
Keyword(s):  
Sunflower Oil ◽  
Low Cost ◽  
Thermoplastic Polyurethane ◽  
Thermal Characterization ◽  
Capacitive Sensor ◽  
Fused Filament Fabrication ◽  
Level Measurement ◽  
3D Printed ◽  
Good Repeatability

In this paper a new low-cost stretchable coplanar capacitive sensor for liquid level sensing is presented. It has been 3D-printed by employing commercial thermoplastic polyurethane (TPU) and conductive materials and using a fused filament fabrication (FFF) process for monolithic fabrication. The sensor presents high linearity and good repeatability when measuring sunflower oil level. Experiments were performed to analyse the behaviour of the developed sensor when applying bending stimuli, in order to verify its flexibility, and a thermal characterization was performed in the temperature range from 10 °C to 40 °C to evaluate its effect on sunflower oil level measurement. The experimental results showed negligible sensitivity of the sensor to bending stimuli, whereas the thermal characterization produced a model describing the relationship between capacitance, temperature, and oil level, allowing temperature compensation in oil level measurement. The different temperature cycles allowed to quantify the main sources of uncertainty, and their effect on level measurement was evaluated.

Sign in / Sign up

Export Citation Format

Share Document