scholarly journals SbSI Composites Based on Epoxy Resin and Cellulose for Energy Harvesting and Sensors—The Influence of SBSI Nanowires Conglomeration on Piezoelectric Properties

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 902 ◽  
Author(s):  
Bartłomiej Toroń ◽  
Piotr Szperlich ◽  
Mateusz Kozioł
Keyword(s):  
Energy Harvesting ◽  
Epoxy Resin ◽  
Piezoelectric Properties ◽  
Piezoelectric Sensor ◽  
Device Fabrication ◽  
Fiber Reinforced Polymer ◽  
Piezoelectric Response ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Antimony Sulfoiodide

In this paper, ferroelectric antimony sulfoiodide (SbSI) nanowires have been used to produce composites for device fabrication, which can be used for energy harvesting and sensors. SbSI is a very useful material for nanogenerators and nanosensors in which the high values of the piezoelectric coefficient (d33 = 650 pC/N) and the electromechanical coefficient (k33 = 0.9) are essential. Alternatively, cellulose and epoxy resin were matrix materials in these composites, whereas SbSI nanowires fill the matrix. Piezoelectric response induced by vibrations has been presented. Then, a composite with an epoxy resin has been used as an element to construct a fiber-reinforced polymer piezoelectric sensor. For the first time, comparison of piezoelectric properties of cellulose/SbSI and epoxy resin/SbSI nanocomposite has been presented. The influence of concentration of SbSI nanowires for properties of epoxy resin/SbSI nanocomposite and in a fiber-reinforced polymer based on them has also been shown. Results of aligning the SbSI nanowires in the epoxy matrix during a curing process have been presented as well.

scholarly journals Durability of an Epoxy Resin and Its Carbon Fiber- Reinforced Polymer Composite upon Immersion in Water, Acidic, and Alkaline Solutions

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 614 ◽  
Author(s):  
Arya Uthaman ◽  
Guijun Xian ◽  
Sabu Thomas ◽  
Yunjia Wang ◽  
Qiang Zheng ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Epoxy Resin ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Alkaline Solutions ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Cfrp Composites ◽  
Carbon Fiber Reinforced

The usage of polymer composites in various engineering fields has increased. However, the long-term service performance of such materials under aggressive conditions is still poorly understood, which limits the development of safe and economically effective designs. In this study, the aging of an epoxy resin and its carbon fiber-reinforced polymer (CFRP) composites upon immersion in water, acidic, and alkaline solutions was evaluated at different temperatures. The service life of the CFRP composites under various conditions could be predicted by the Arrhenius theory. The thermal and mechanical analysis results indicated that the CFRP composites were more vulnerable to HCl owing to the higher moisture absorption and diffusion of HCl into their cracks. The scanning electron microscopy results showed that the polymer matrix was damaged and degraded. Therefore, to allow long-term application, CFRP composites must be protected from acidic environments.

Durability Performances of Aramid Fiber Reinforced Polymer as Reinforcement Material for Concrete Structures in Cold Regions

2020 ◽  
Vol 853 ◽  
pp. 171-176
Author(s):  
Shuo Zhang ◽  
Chun Lin Liu ◽  
Wen Zhu ◽  
Meng Xiong Tang ◽  
He Song Hu ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Elastic Modulus ◽  
Epoxy Resin ◽  
Aramid Fiber ◽  
Fiber Reinforced Polymer ◽  
Resin Matrix ◽  
Fiber Reinforced ◽  
Freeze Thaw ◽  
Dry Air ◽  
Reinforced Polymer

A series of tests were conducted to investigate the mechanical performances of aramid fiber reinforced polymer (AFRP) and its epoxy resin matrix after 0, 20, 40, 60 and 80 freeze-thaw cycles in the dry air, respectively. After a given number of freeze-thaw cycles, the residual tensile strength and elastic modulus of AFRP specimens were measured, and the lap-shear strength of epoxy resin adhesive specimens was gained. Test results show that: (1) Variation of the elastic modulus of AFRP with the increasing of the freeze-thaw cycles exhibits the same tendency as the tensile strength did. They increase in the first 20 to 40 cycles and then decrease till the end of 80 cycles; (2) The tensile strength and elastic modulus of AFRP decreases by 5.1% and 8.2%, respectively, after 80 cycles as compared with that kept in the laboratory environments. However, the effect of the freeze-thaw cycling in the dry air on the tensile properties of CFRP is very limited within 80 cycles; (3) The freeze-thaw cycling in the dry air of this study has an adverse effect on the adhesive property of the epoxy resin, which could be regarded as the evidence for the degradation of the interface between aramid/carbon fiber and matrix.

Epoxy resin with exchangeable disulfide crosslinks to obtain reprocessable, repairable and recyclable fiber-reinforced thermoset composites

2016 ◽  
Vol 3 (3) ◽  
pp. 241-247 ◽  
Author(s):  
Alaitz Ruiz de Luzuriaga ◽  
Roberto Martin ◽  
Nerea Markaide ◽  
Alaitz Rekondo ◽  
Germán Cabañero ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Polymer Composites ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Thermoset Composites ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites

Thermoset fiber-reinforced polymer composites can now be reprocessed, recycled and repaired, thanks to a dynamic epoxy resin.

scholarly journals Comparative Failure Study of Different Bonded Basalt Fiber-Reinforced Polymer (BFRP)-AL Joints in a Humid and Hot Environment

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2593
Author(s):  
Yisa Fan ◽  
Jinzhan Guo ◽  
Xiaopeng Wang ◽  
Yu Xia ◽  
Peng Han ◽  
...  
Keyword(s):  
High Temperature ◽  
Epoxy Resin ◽  
Pure Water ◽  
Water Environment ◽  
Basalt Fiber ◽  
Lap Joints ◽  
Fiber Reinforced Polymer ◽  
Displacement Curve ◽  
Fiber Reinforced ◽  
Reinforced Polymer

Fiber-reinforced polymer (FRP) materials are increasingly used in automotive industrial fields to achieve lightweight. In order to study the influence of high temperature and high humidity on the bonding structure between different materials, this paper selects basalt fiber-reinforced resin composite materials (BFRP) and aluminum alloy (Al), and uses Araldite® 2012 and Araldite® 2014, two adhesives, to make single lap joints (SLJs). The aging test was carried out for 0 (unaged), 10, 20, and 30 days under the environment of 80 °C/95% relative humidity (RH) and 80 °C/pure water. In this work, simple Fickian law was used to simulate the hygroscopic change law of dumbbell specimens of two adhesives and BFRP in a pure water environment. It was discovered that Araldite® 2012 is most affected by moisture, but the time to reach the maximum water absorption in Araldite® 2014 was shorter than in Araldite® 2012. The failure strength of the joint was obtained through a quasi-static tensile experiment, and it was found that the Araldite® 2014 adhesive joint first increased and then decreased in a high temperature environment. The strength increased by 11.63% after 20 days of aging under an 80 °C/95%RH environment, and increased by 16.66% after 10 days of aging under an 80 °C/pure water environment, which indicates that post-curing reaction occurred. The strength of Araldite® 2012 joints showed a downward trend. After 30 days of aging, it reduced by 40.38% under an 80 °C/95%RH environment and 41.11% under an 80 °C/pure water environment. By observing the load-displacement curve, it was found that, as time increased, the slope of the curve decreased, indicating that the stiffness of the bonded joint decreased with time. The failure modes of the joints were analyzed by macroscopic images and microscopic SEM methods, and the results showed that the surface failure transitions from a mixed failure to a complete tear failure over time. The failure of the basalt fiber/resin interface was because the interaction between the epoxy resin in the adhesive and the epoxy resin in BFRP was greater than the force between the basalt fiber layer and the epoxy resin layer in the BFRP sheet.

Review of Durability of Fiber Reinforced Polymer (FRP) Reinforced Concrete Structure

2014 ◽  
Vol 548-549 ◽  
pp. 1651-1654 ◽  
Author(s):  
Yao Hong Huang ◽  
Yong Chang Guo
Keyword(s):  
Reinforced Concrete ◽  
Epoxy Resin ◽  
Concrete Structure ◽  
Concrete Structures ◽  
Fiber Reinforced Polymer ◽  
Reinforced Concrete Structures ◽  
Fiber Reinforced ◽  
Reinforced Concrete Structure ◽  
Reinforced Polymer ◽  
Research Situation

With the wide application of FRP reinforced concrete structure, the durability of FRP reinforced concrete structure causing more and more attention . This paper introduce domestic and foreign research situation of durability of FRP reinforced concrete structure in three aspects including FRP material, epoxy resin and FRP reinforced concrete structures .

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