Nanohybrids of novolac phenolic resin and carbon nanotube-containing silica network

Noparvar-Qarebagh, Akbar; Roghani‐Mamaqani, Hossein; Salami‐Kalajahi, Mehdi; Kariminejad, Bahareh

doi:10.1007/s10973-016-5970-0

Cited by 29 publications

(16 citation statements)

References 40 publications

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“…In the spectrum of NR, asymmetric bending vibration of C-H units, stretching vibration of C=C groups, and C-O vibration of phenol groups appear at 1511, 1611, 1098 cm -1 , respectively. Appearance of Si-O vibration in the spectrum of MNR at 1048 cm -1 confirms successful grafting of GPTMS to NR backbone [14,29]. In the spectra of hybrid composites, all distinctive peaks of MER, MNR, and SFGO are observed.…”

Section: Resultsmentioning

confidence: 71%

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Modification of graphene with silica nanoparticles for use in hybrid network formation from epoxy, novolac, and epoxidized novolac resins by sol-gel method: Investigation of thermal properties

Mousavi¹,

Roghani‐Mamaqani²,

Salami‐Kalajahi³

et al. 2018

Express Polym. Lett.

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Section: Resultsmentioning

confidence: 71%

“…(3-glycidyloxypropyl)trimethoxysilane (GPTMS) to obtain MNR Novolac resin modification was carried out by a ring opening reaction between epoxy groups of GPTMS and hydroxyl groups of novolac resin, as reported previously [29]. Novolac resin (5 g) was dissolved in THF (5 mL) in a 100 mL round-bottom flask.…”

Section: Modification Of Novolac Resin Withmentioning

confidence: 99%

Modification of graphene with silica nanoparticles for use in hybrid network formation from epoxy, novolac, and epoxidized novolac resins by sol-gel method: Investigation of thermal properties

Mousavi¹,

Roghani‐Mamaqani²,

Salami‐Kalajahi³

et al. 2018

Express Polym. Lett.

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“…CNTFA shows an extra degradation step at temperatures higher than 300°C which is related to degradation of furfuryl alcohol moieties. CNTFA reaches to char residue of 91.5 at 600°C, which shows that about 3.3 wt% of CNTFA is composed of furfuryl alcohol moieties (the difference between the char residues for CNTCOOH and CNTFA) . In the case of cured ENR and its composites, the most considerable mass loss occurred in 250–400°C, which results from methylene bridges decomposition into methyl, phenol, and cresol groups .…”

Section: Resultsmentioning

confidence: 97%

Preparation of Furfuryl Alcohol‐Functionalized Carbon Nanotube and Epoxidized Novolac Resin Composites with High Char Yield

et al. 2018

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Epoxidized novolac resin (ENR) composites with high thermal stability and char residue were prepared by incorporation of furfuryl alcohol‐modified carbon nanotubes (CNTFA). Modification of oxidized carbon nanotubes (CNTs) with furfuryl alcohol resulted in their improved dispersion in the resin matrix. After curing of ENR in the presence of CNTFA with ethylenediamine, thermally stable composites were obtained. Successful modification of CNTs with furfuryl alcohol was confirmed using Fourier‐transform infrared spectroscopy and thermogravimetric analysis (TGA). TGA results showed that degradation temperature and char residue of cured ENR were considerably increased by incorporation of CNTFA. CNTFA reached to char residue of 91.5% at 600°C, which shows that about 3.3 wt% of CNTFA is composed of furfuryl alcohol. Addition of 2 and 4 wt% of CNTFA into the ENR matrix results in increase of char content from 44.7% for to 45.4 and 49.4%, respectively. X‐ray diffraction showed that CNTFA was uniquely dispersed in the ENR matrix. Scanning electron microscopy and transmission electron microscopy images showed tubular and entangled structure of CNTFA. Finally, these results show that this approach can be considered in production of thermal‐resistant composites. POLYM. COMPOS., 39:E1231–E1236, 2018. © 2018 Society of Plastics Engineers

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“…For preparation of CNTOH, CNTCOOH (0.5 g) and DMF (100 mL) were mixed and sonicated for 30 min. After addition of ethylene glycol (20 mL), DCC (6.0 g) and DMAP (0.45 g) were added and stirred for 24 h. Finally, the product was obtained by filtration, washing with ethanol and drying at 65°C .…”

Section: Methodsmentioning

confidence: 99%

Preparation of carbon nanotube and polyurethane‐imide hybrid composites by sol–gel reaction

2018

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Polyurethane (PU) and carbon nanotube (CNT) hybrid composites with improved thermal stability were prepared by sol–gel reaction. Here, pyromellitic dianhydride (PMDA) and butanediol (BD) were used as two different chain extenders and the products were end‐functionalized with (3‐aminopropyl) triethoxysilane (APTES) to obtain PUI and PUBD, respectively. By incorporation of 3‐(trimethoxysilyl)propyl methacrylate (MPS)‐functionalized CNT and PU samples into the silica/siloxane network, two different hybrid composites were obtained and compared in degradation temperature and char residues. Fourier‐transform infrared (FT‐IR) spectroscopy and thermogravimetric analysis (TGA) confirmed successful modification of CNT with MPS. Absence of FT‐IR band of isocyanate groups confirms successful reaction of APTES with isocyanate groups in both PUBD and PUI. According to TGA results, the PUI hybrid composites with 4 wt% of CNTS showed char contents of 22.5%. Addition of 4 wt% of CNTS into the PUBD hybrid resulted in char residue of 21.2%. Therefore, the hybrid composites formed from PMDA showed higher degradation temperature and char residues. X‐ray diffraction showed an amorphous peak for crosslinked PU at near 2θ = 21.7°. The tubular structure of CNTS was confirmed by scanning and transmission electron microscopies. POLYM. COMPOS., 40:E1903–E1909, 2019. © 2018 Society of Plastics Engineers

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Nanohybrids of novolac phenolic resin and carbon nanotube-containing silica network

Cited by 29 publications

References 40 publications

Modification of graphene with silica nanoparticles for use in hybrid network formation from epoxy, novolac, and epoxidized novolac resins by sol-gel method: Investigation of thermal properties

Modification of graphene with silica nanoparticles for use in hybrid network formation from epoxy, novolac, and epoxidized novolac resins by sol-gel method: Investigation of thermal properties

Preparation of Furfuryl Alcohol‐Functionalized Carbon Nanotube and Epoxidized Novolac Resin Composites with High Char Yield

Preparation of carbon nanotube and polyurethane‐imide hybrid composites by sol–gel reaction

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