Fabrication of functionally graded nano‐TiO₂‐reinforced epoxy matrix composites

Abstract

Functionally graded nano‐TiO2 epoxy matrix composites were successfully fabricated using a centrifugal method. In the preparation of the composite, the aggregation of nano‐TiO2 occurred during curing, which had a negative effect on the composite performance. To solve this problem, we introduced a silane coupling agent to modify the surface of the nano‐TiO2, thereby improving the performance and mechanical properties simultaneously. The modified nano‐TiO2 (s‐TiO2) had better dispersion in the epoxy resin, making it possible to produce depth gradients of the mechanical properties of functionally graded materials (FGMs). The s‐TiO2 was characterized with respect to functional groups, morphology, and chemical elements using transmission electron microscopy, X‐ray photoelectron spectroscopy, and Fourier‐transform infrared spectroscopy. The results show that a silane layer was successfully coated on the surface. Also, the gradients of the mechanical and permittivity properties of the FGM indicated that by modifying the surface of the nano‐filler, it is possible to fabricate nano‐filler‐reinforced epoxy matrix FGMs using a centrifugal method. POLYM. COMPOS., 35:557–563, 2014. © 2013 Society of Plastics Engineers

Repercussion of manufacturing techniques on mechanical and wear peculiarity of zno particulate‐filled polyester composites

“…Epoxy graded composites have better mechanical properties and wear resistance as compared to homogeneous composites . The same result is also observed with nano‐ TiO 2 filled epoxy graded composites . Industrial waste called cement kiln dust (CKD) has been used by Siddhartha et al as filler material to fabricate FGMs.…”

In-plane thermal loading effects on vibrational characteristics of functionally graded nanobeams

“…They concluded that the electrical and thermal properties of nanocomposites could be manipulated by changing the gradient patterns. Also, Wang et al [21] utilized centrifugal method to fabricate the functionally graded nano composites. Therefore, establishing an accurate model of FG nanobeams is a key issue for successful NEMS design.…”

Titanium dioxide nanoparticles surface modified with imine as fillers for epoxy resin

“…Especially, the incorporation of different inorganic nanoparticles as reinforcing agents in epoxy resins is proved to be a powerful tool to achieve remarkable improvement of various properties of epoxy resins, and consequently to accommodate feature requirements for specific applications. It has been shown that the addition of nanoparticles such as TiO 2 [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16], SiO 2 [17,18], nanodiamonds [19,20], graphene [21][22][23], carbon nanotube [24][25][26], clay [27,28], ZnO [29,30], etc. can enhance tensile strength, elongation at break, tensile, storage, and flexural modulus, toughness, impact and compression strength, scratch resistance, hardness, adhesive strength, reduce creep rate, improve rheological properties, enhance thermal stability, thermal and electrical conductivity, flame retardancy, dielectric, barrier, anticorrosion, optical and shielding properties of epoxy resins.…”

“…Although various nanoparticles are applied as fillers for epoxy resins, special attention has been given to the epoxy nanocomposites based on TiO 2 nanoparticles [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. This is not surprising since TiO 2 nanoparticles exhibit good optical, catalytic, anticorrosion, dielectric and mechanical properties, high stability, low cost, etc.…”

“…In addition, by the adequate treatment of the surface of nanoparticles, the compatibility and interfacial in-teractions between nanofiller and polymer matrix may be enhanced as well. Wang et al have shown that aggregation of TiO 2 nanoparticles in epoxy resin can be prevented by their surface modification with a silane coupling agent [9]. Rubab et al have used TiO 2 nanoparticles surface modified with γ-aminopropyltriethoxysilane to prepare epoxy resin (ER)/ TiO 2 nanocomposites with noticeable improved mechanical properties and glass transition temperature (Tg), compared to the pure epoxy resin [3].…”