preparation and evaluation of mechanical and thermal properties of epoxy/silica nanocomposites

Subject Areas : journal of New Materials

lمحمدرضا Safavi ¹ (دانشجوی کارشناسی ارشد مهندسی مواد دانشگاه شیراز)
رحیم Eqra ² (استادیار پژوهشکده مکانیک، پژوهشگاه فضایی ایران)
حبیب Daneshmanesh ³ (استاد دانشگاه شیراز)

Received: 2017-04-10 Accepted : 2018-05-08 Published : 2018-04-21

Keywords: mechanical properties, thermal properties, epoxy resin, nanosilica,

Abstract :

The most recent studies have shown, due to high specific strength, and modulus, low density, low fabrication cost, and easy production processes, the raw material used is polymer. Thermosets are the most studied polymers during recent researches, they generally have higher chemical and thermal resistance than thermoplastics. Despite theseimportantadvantages, there are also some disadvantages, the most important imperfection of thermosetting polymers is their brittleness. In this study Epoxy/(up to 1.5 wt%)silica nanocomposites fabricated by casting method and then mechanical and thermal properties of nanocomposites are evaluated  and Fourier Transform Infrared Spectroscopy (FT-IR) was implemented to study molecular bonding . Mechanical tests results showed 43%, 12% and, 40 % increase in strength, flexural strength and, toughness, respectively. Thermal gravimetric analysis results showed 22% decrease in Reduction of mass and Dynamic mechanical analysis results illustrated an increase in Glass transition temperature of Epoxy/0.3 wt% nanosilica from 74.5 ^◦C to 75.4 ^◦C, and an increase in storage modulus from 1.8Gpa to 2.3Gpa at 30^◦C.

References:

1-         Boyle, Maureen A., Cary J. Martin, and John D. Neuner. "Epoxy resins." ASM Handbook Volume 21 Composites (2001): 78-89.

2-         Paul, D. R., and Lioyd M. Robeson. "Polymer nanotechnology: nanocomposites." Polymer 49.15 (2008): 3187-3204.

3-         Matthews, Frank L., and Rees D. Rawlings. Composite materials: engineering and science. Elsevier, 1999.

4-         Sarkar, Sudipta, et al. "Polymer-supported metals and metal oxide nanoparticles: synthesis, characterization, and applications." Journal of Nanoparticle Research 14.2 (2012): 715.

5-         Eqra, Rahim, Kamal Janghorban, and Habib Daneshmanesh. "Mechanical properties and toughening mechanisms of epoxy/graphene nanocomposites." Journal of Polymer Engineering 35.3 (2015): 257-266.

6-         Jiang, Tongwu, et al. "Enhanced mechanical properties of silanized silica nanoparticle attached graphene oxide/epoxy composites." Composites Science and Technology 79 (2013): 115-125.

7-         Chen, Chenggang, et al. "Highly dispersed nanosilica–epoxy resins with enhanced mechanical properties." Polymer 49.17 (2008): 3805-3815.

8-         Ma, Jun, et al. "Effect of inorganic nanoparticles on mechanical property, fracture toughness and toughening mechanism of two epoxy systems." Polymer 49.16 (2008): 3510-3523.

9-         Liang, Y. L., and R. A. Pearson. "Toughening mechanisms in epoxy–silica nanocomposites (ESNs)." Polymer 50.20 (2009): 4895-4905.

10-       Barabanova, A. I., et al. "Transparent epoxy/silica nanocomposites with increased glass transition temperatures." Procedia Chemistry 4 (2012): 352-359.

11-       Kothmann, M. H., et al. "Fatigue crack propagation behaviour of epoxy resins modified with silica-nanoparticles." Polymer 60 (2015): 157-163.

12-       Zappalorto, M., et al. "Mechanical behaviour of epoxy/silica nanocomposites: experiments and modelling." Composites Part A: Applied Science and Manufacturing 72 (2015): 58-64.

13-       Dmitriev, Andrey I., et al. "Modeling of the stress–strain behavior of an epoxy-based nanocomposite filled with silica nanoparticles." Materials & Design 89 (2016): 950-956.

14-       Abenojar, J., et al. "Erosion-wear, mechanical and thermal properties of silica filled epoxy nanocomposites." Composites Part B: Engineering 120 (2017): 42-53

 

15-       Dittanet, Peerapan, Raymond A. Pearson, and Paisan Kongkachuichay. "Thermo-mechanical behaviors and moisture absorption of silica nanoparticle reinforcement in epoxy resins." International Journal of Adhesion and Adhesives 78 (2017): 74-82.

16-       Roenner, Nils, et al. "Simultaneous improvements in flammability and mechanical toughening of epoxy resins through nano-silica addition." Fire Safety Journal (2017).

17-       Battistella, M., et al. "Fracture behaviour of fumed silica/epoxy nanocomposites." Composites Part A: Applied Science and Manufacturing 39.12 (2008): 1851-1858.

18-       Dittanet, Peerapan, and Raymond A. Pearson. "Effect of silica nanoparticle size on toughening mechanisms of filled epoxy." Polymer 53.9 (2012): 1890-1905.

19-       Hsiao, Min-Chien, et al. "Thermally conductive and electrically insulating epoxy nanocomposites with thermally reduced graphene oxide–silica hybrid nanosheets." Nanoscale 5.13 (2013): 5863-5871.

20-       Chen, Li, et al. "Enhanced epoxy/silica composites mechanical properties by introducing graphene oxide to the interface." ACS applied materials & interfaces 4.8 (2012): 4398-4404.

21-       Bao, Chenlu, et al. "In situ preparation of functionalized graphene oxide/epoxy nanocomposites with effective reinforcements." Journal of Materials Chemistry 21.35 (2011): 13290-13298.

22-       Li, Jiani, et al. "The situ preparation of silica nanoparticles on the surface of functionalized graphene nanoplatelets." Nanoscale Research Letters 9.1 (2014): 172.

23-       Gudarzi, M. Moazzami, and F. Sharif. "Enhancement of dispersion and bonding of graphene-polymer through wet transfer of functionalized graphene oxide." Express Polymer Letters 6.12 (2012).

24-       Hsu, Chien‐Hua, et al. "Physical study of room‐temperature‐cured epoxy/thermally reduced graphene oxides with various contents of oxygen‐containing groups." Polymer International 63.10 (2014): 1765-1770.