Effects of surface-modified silica nanoparticles attached graphene oxide using isocyanate-terminated flexible polymer chains on the mechanical properties of epoxy composites

Jiang, Tongwu; Kuila, Tapas; Kim, Nam Hoon; Lee, Joong Hee

doi:10.1039/c4ta00584h

Cited by 81 publications

(41 citation statements)

References 58 publications

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“…Among different studied polymer composites, epoxy‐based composites have been widely explored due to the excellent properties associated with its highly crosslinked microstructure. Epoxy resins, one of the structural polymers are known for their good mechanical and thermal properties, high adhesive strength and electrical insulation, low shrinkage, chemical and corrosion resistance . However, severe brittleness and poor resistance to crack propagation has narrow down the applicability of epoxy‐based materials for various fields.…”

Section: Introductionmentioning

confidence: 99%

Interface engineering for the improvement of mechanical and thermal properties of covalent functionalized graphene/epoxy composites

Chhetri

Adak

Samanta

et al. 2017

J of Applied Polymer Sci

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Functionalized reduced graphene oxide (GO)/epoxy composites are fabricated through solution mixing. GO is functionalized using 3-amino-1,2,4-triazole (TZ) in presence of potassium hydroxide (KOH). KOH is expected to serve dual role as catalyst for nucleophilic addition reaction between GO and TZ, and also as reducing agent. The grafting of TZ moiety on GO is confirmed by Fourier transform infrared spectroscopy, X-ray diffraction, and thermogravimetric analysis. The prepared composites show remarkable improvement in mechanical and thermal stability. The fracture toughness of the composites (critical stress intensity factor, K IC ) achieved from single edge notched bending testing is improved by 111% against pure epoxy at 0.1 wt % loading of TZ functionalized GO. Further, the tensile strength and Young's modulus are improved by 30.5% and 35%, respectively. Thermal stability of the composites as investigated by thermogravimetric analysis showed 29 8C rise in onset degradation temperature for 0.1 wt % TZ functionalized GO incorporated composite.

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Section: Introductionmentioning

confidence: 99%

Interface engineering for the improvement of mechanical and thermal properties of covalent functionalized graphene/epoxy composites

Chhetri

Adak

Samanta

et al. 2017

J of Applied Polymer Sci

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“…The groups marked in red represented the active groups in each stage. The methoxyl groups of MPTMS were hydrolyzed to form silanol groups, and then the silanol groups were condensed with the hydroxyl groups on the RBC surface, by dehydration during the drying process or hot‐pressing process . After mixing with NBR latex, the mercapto groups on the other side of MPTMS molecule reacted with the CC bonds on the NBR macromolecular chains, during hot‐pressing.…”

Section: Resultsmentioning

confidence: 99%

Section: Effect Of Silane Coupling Agent On the Performances Of Rbc/nmentioning

confidence: 99%

The properties of rice bran carbon/nitrile‐butadiene rubber composites fabricated by latex compounding method

Zhang

et al. 2016

Polymer Composites

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Nitrile‐butadiene rubber (NBR) composites incorporated with four kinds of rice bran carbon (RBC), with different particle sizes, were fabricated by latex compounding method based on the superior dispersion ability of RBCs in NBR latex. Field emission scanning electron microscopy was employed to confirm the uniform dispersion of filler in the matrix. The mechanical property and oxygen transmission rates of the vulcanizates were studied. The RBC with smallest particle size exhibited best reinforcing performance. Then RBC/NBR composites, with different concentration of (3‐mercaptopropyl) trimethoxysilane (MPTMS), were prepared by a facile process. MPTMS, for the purpose of enhancing the compatibility between the filler and matrix, was incorporated into the rubber by an in situ method. Morphological analysis, Raman spectroscopy, and dynamic mechanical analysis tests confirmed the improvement of the interfacial interactions between the RBC and NBR matrix. The incorporation of MPTMS significantly enhanced the mechanical and oxygen barrier properties of the RBC/NBR composites. Both, the mechanical property and oxygen barrier abilities increased as the loading of the MPTMS increased, within a range of 0–9 phr. POLYM. COMPOS., 2016. © 2016 Society of Plastics Engineers

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“…Many hydroxyl groups of SiO 2 surface not only possess good hydrophilic and compatible with polymer resin, but also provide the reactive sites for further surface modification. Many researchers have reported that the addition of SiO 2 in matrix resin leaded to the obvious enhancements of interfacial strength and bulk performance . Moreover, compared with CNTs or GO, SiO 2 are readily obtainable, much cheaper and possessing of special structure, showing unique advantages for large‐scale industrial production.…”

Section: Introductionmentioning

confidence: 99%

Enhancing interfacial strength and hydrothermal aging resistance of silicone resin composites by different modification of carbon fibers with silica nanoparticles

Zhang

2018

Polymer Composites

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Besides the well‐designed combination of the fibers and matrix resin, the fiber‐matrix interface plays a key role in bulk properties of composites. Here, the chemical grafting of silica nanoparticle (SiO2) onto fiber surface (CF‐g‐SiO2) using the bridging toluene‐2,4‐diisocyanate has been achieved and compared with the physical adsorption one (CF‐ad‐SiO2). Fourier transform infrared spectroscopy and X‐ray photoelectron spectroscopy confirmed the covalent bonding nature between SiO2 and CF. By atomic force microscopy observation, coating or grafting SiO2 on the surface of CFs also enhanced fiber surface polarity and roughness. However, CF‐g‐SiO2 showed a better uniform distribution of SiO2 on the fiber surface compared with CF‐ad‐SiO2 with the serious agglomeration of SiO2. These results of dynamic contact angle measurements indicated that CF‐ad‐SiO2 and CF‐g‐SiO2 had the similar increase degree of surface free energy, which contributed to improve the wettability between CFs and matrix resin. Interfacial shear strength (IFSS) and interlaminar shear strength (ILSS) showed great enhancements, especially for CF‐g‐SiO2 composites, which increased 10.92% in ILSS and 10.71% in IFSS compared with those of CF‐ad‐SiO2 composites. Moreover, the interfacial reinforcing mechanisms have also been studied. Additionally, the introduced Si‐O‐Si bonds at the interface by SiO2 coating or grafting resulted in the different improved degree of the hydrothermal aging resistance. The results showed that the quality of fiber‐matrix interface could be tuned by varying the bonding natures between CFs and the modifiers, and chemically grafting SiO2 onto the fiber surface is the promising multifunctional reinforcement. POLYM. COMPOS., 40:E975–E982, 2019. © 2018 Society of Plastics Engineers

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Effects of surface-modified silica nanoparticles attached graphene oxide using isocyanate-terminated flexible polymer chains on the mechanical properties of epoxy composites

Abstract: Surface modified silica nanoparticles attached to graphene oxide using isocyanate terminated flexible chains were used for toughening epoxy.

Cited by 81 publications

References 58 publications

Interface engineering for the improvement of mechanical and thermal properties of covalent functionalized graphene/epoxy composites

Interface engineering for the improvement of mechanical and thermal properties of covalent functionalized graphene/epoxy composites

The properties of rice bran carbon/nitrile‐butadiene rubber composites fabricated by latex compounding method

Enhancing interfacial strength and hydrothermal aging resistance of silicone resin composites by different modification of carbon fibers with silica nanoparticles

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