Facile preparation of carbon nanotube aerogels with controlled hierarchical microstructures and versatile performance

Dong, Liubing; Yang, Qian; Xu, Chengjun; Li, Yang; Yang, Deming; Hou, Feng; Yin, Hongfeng; Kang, Feiyu

doi:10.1016/j.carbon.2015.04.004

Cited by 53 publications

(26 citation statements)

References 46 publications

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“…According to IUPAC, pores are categorized in macropores with diameters larger than 50 nm, mesopores with diameters in range of 2-50 nm, and micropores with diameters less than 2 nm [68]. The rapid increase of N 2 adsorption at low relative pressures is attributed to the presence of micropores in the hybrid structure of GX [69]. Cumulative pore volume and also .…”

Section: Resultsmentioning

confidence: 99%

Incorporation of epoxy resin and graphene nanolayers into silica xerogel network: an insight into thermal improvement of resin

Najafi-Shoa

Roghani‐Mamaqani

Salami‐Kalajahi

2016

J Sol-Gel Sci Technol

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Three well-tuned procedures were used for thermal improvement of epoxy resin (E). Accordingly, graphene xerogel (GX) was used as nanofiller in the matrix of E. Additionally, (3-isocyanatopropyl)triethoxysilanemodified E (IE) or tetraethyl orthosilicate (TEOS) oligomer-modified E (TE) was incorporated into a hybrid structure of graphene-containing silica/siloxane network. For this purpose, a bifunctional silane coupling agent of 1,1 0 -(hexane-1,6-diyl)bis(3-(3-(trimethoxysilyl)propyl)urea) (HDBTMSPU) was synthesized. GX was obtained by incorporation of HDBTMSPU-modified graphene oxide (FGO) into xerogel structure using HDBTMSPU and TEOS. Modified resins, FGO, HDBTMSPU, and TEOS were also used in preparation of hybrid products. Thermal stability and char residue of the composites were compared. GO modification was approved by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, Raman, X-ray diffraction, and thermogravimetric analysis results. Hybrid composite of IE, FGO, and silica/siloxane network shows higher thermal properties. Char residue is increased by 16.93 % by loading of only 1 wt% of FGO in this hybrid product. Graphical Abstract

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Section: Resultsmentioning

confidence: 99%

Incorporation of epoxy resin and graphene nanolayers into silica xerogel network: an insight into thermal improvement of resin

Najafi-Shoa

Roghani‐Mamaqani

Salami‐Kalajahi

2016

J Sol-Gel Sci Technol

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show abstract

“…According to IUPAC, pores with diameters larger than 50 nm are macropores, pores with diameters in range of 2-50 nm are mesopores, and pores with diameters less than 2 nm are micropores [67]. The fast rise of isotherm at lower relative pressures (P/P 0 \ 0.01) can be ascribed to micropores in CNTX hybrid structure [68]. Cumulative pore volume and pore size distribution plots, obtained from Barrett-Joyner-Halenda (BJH) method [69], as a function of pore diameter for CNTX, are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Incorporation of epoxy resin and carbon nanotube into silica/siloxane network for improving thermal properties

et al. 2016

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Thermal properties of epoxy resin (E) were improved by its incorporation into silica/siloxane network in the presence of carbon nanotube (CNT). At first, CNT xerogel (CNTX)/E composite was prepared by curing E in the presence of CNTX. Then, E is modified with (3-isocyanatopropyl)triethoxysilane (IE) or tetraethyl orthosilicate (TEOS) oligomer (TE) for its incorporation into a hybrid network of CNT-containing silica/siloxane network. For this purpose, a bifunctional modifier of 1,1 0 -(hexane-1,6-diyl)bis(3-(3-(trimethoxysilyl)propyl)urea) (HDBTMSPU) was synthesized. CNTX was prepared by incorporation of HDBTMSPU-modified CNT (FCNT) into silica/siloxane network by using HDBTMSPU and TEOS. IE (TE), FGO, HDBTMSPU, and TEOS were also used in the preparation of hybrid products. Three types of composites were compared in their thermal degradation temperature and char content. Functionalization of CNT was confirmed by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, Raman, X-ray diffraction (XRD), and thermogravimetric analysis (TGA) results. Xerogel formation was proved by Raman, XRD, and N 2 adsorption and desorption isotherms. TGA results showed that the hybrid of IE, FCNT, and silica/ siloxane network shows higher thermal properties. Char residue is increased 17.54 % by only 4 wt% loading of FCNT in IE resin (IEGX1). Formation of xerogel network around CNT was observed by scanning and transmission electron microscopies.

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“…1). High porosity (95~97%), strong strength and robust microstructures of the aerogels [8] are conducive to the effective infusion of epoxy and the keep of CNT frameworks in composites. The electrical conductivity of neat epoxy (EP) is only about 10 -11 S/m, while it is improved by 7~8 orders of magnitude for CNTs/epoxy composites.…”

Section: Resultsmentioning

confidence: 99%

“…[8] reported method. When the weight ratio of CMC to CNT is 0, 0.1, 0.2, 0.3 and 0.4, the prepared aerogel is noted as CA0, CA1, CA2, CA3 and CA4, respectively.…”

Section: Methodsmentioning

confidence: 99%

Preparation of carbon nanotubes/epoxy composites using novel aerogel substrates

Dong

Zhang

et al. 2015

Materials Letters

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Facile preparation of carbon nanotube aerogels with controlled hierarchical microstructures and versatile performance

Cited by 53 publications

References 46 publications

Incorporation of epoxy resin and graphene nanolayers into silica xerogel network: an insight into thermal improvement of resin

Incorporation of epoxy resin and graphene nanolayers into silica xerogel network: an insight into thermal improvement of resin

Incorporation of epoxy resin and carbon nanotube into silica/siloxane network for improving thermal properties

Preparation of carbon nanotubes/epoxy composites using novel aerogel substrates

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