Surface modification of multi-walled carbon nanotubes using 3-aminopropyltriethoxysilane

The effect of the surface modification of carbon nanotubes on their dispersion in the epoxy matrix Functionalization of multi-walled carbon nanotubes (MWCNTs) has an effect on the dispersion of MWCNT in the epoxy matrix. Samples based on two kinds of epoxy resin and different weight percentage of MWCNTs (functionalized and non-functionalized) were prepared. Epoxy/carbon nanotubes composites were prepared by different mixing methods (ultrasounds and a combination of ultrasounds and mechanical mixing). CNTs modified with different functional groups were investigated. Surfactants were used to lower the surface tension of the liquid, which enabled easier spreading and reducing the interfacial tension. Solvents were also used to reduce the liquid viscosity. Some of them facilitate homogeneous dispersion of nanotubes in the resin. The properties of epoxy/nanotubes composites strongly depend on a uniform distribution of carbon nanotubes in the epoxy matrix. The type of epoxy resin, solvent, surfactant and mixing method for homogeneous dispersion of CNTs in the epoxy matrix was evaluated. The effect of CNTs functionalization type on their dispersion in the epoxy resins was evaluated on the basis of viscosity and microstructure studies.

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High Cycling Stability of the LiNi 0.8 Co 0.1 Mn 0.1 O 2 Cathode via Surface Modification with Polyimide/Multi‐Walled Carbon Nanotubes Composite Coating

Small ◽

10.1002/smll.202102981 ◽

2021 ◽

pp. 2102981

Author(s):

Guojun Zha ◽

Chuying Ouyang ◽

Shungao Yin ◽

Kaiqing Yao ◽

Seema Agarwal ◽

...

Keyword(s):

Carbon Nanotubes ◽

Surface Modification ◽

Composite Coating ◽

Cycling Stability ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes

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Surface modification and application of multi-walled carbon nanotubes in fire-retardant coatings

Carbon ◽

10.1016/j.carbon.2009.12.015 ◽

2010 ◽

Vol 48 (5) ◽

pp. 1694-1695 ◽

Cited By ~ 2

Author(s):

Jun Qiu ◽

Shi-hong Zhang ◽

Guo-jian Wang ◽

Yi-lei Gong

Keyword(s):

Carbon Nanotubes ◽

Surface Modification ◽

Fire Retardant ◽

Multi Walled Carbon Nanotubes ◽

In Fire ◽

Walled Carbon Nanotubes

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Surface modification of multi-walled carbon nanotubes by O2 plasma

Applied Surface Science ◽

10.1016/j.apsusc.2007.05.028 ◽

2007 ◽

Vol 253 (22) ◽

pp. 8945-8951 ◽

Cited By ~ 109

Author(s):

Tao Xu ◽

Jinghui Yang ◽

Jiwei Liu ◽

Qiang Fu

Keyword(s):

Carbon Nanotubes ◽

Surface Modification ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes ◽

O2 Plasma

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One-step surface modification of multi-walled carbon nanotubes by pyrrole

Materials Letters ◽

10.1016/j.matlet.2014.07.011 ◽

2014 ◽

Vol 134 ◽

pp. 91-94 ◽

Cited By ~ 8

Author(s):

Shinian Liu ◽

Cheng Wang ◽

Zengfu Wei ◽

Wangyan Lv ◽

Shengping Fan ◽

...

Keyword(s):

Carbon Nanotubes ◽

Surface Modification ◽

Multi Walled Carbon Nanotubes ◽

One Step ◽

Walled Carbon Nanotubes

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Chemical Surface Modification of CNTs via Three Oxidative Acid Treatments

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1107.320 ◽

2015 ◽

Vol 1107 ◽

pp. 320-325

Author(s):

Bryan Gindana ◽

Arvyvie Abie Jamil ◽

Brian Brandon Bernard ◽

Florinna Tan ◽

M.A. Siti Aishah ◽

...

Keyword(s):

Carbon Nanotubes ◽

Surface Modification ◽

Carbon Nanotube ◽

Chemical Surface ◽

Stable Dispersion ◽

Chemical Surface Modification ◽

Multi Walled Carbon Nanotubes ◽

Dispersing Ability ◽

Walled Carbon Nanotubes ◽

Acid Treatments

Carbon nanotubes are commonly used to create polymer-nanotube composite for various applications. To suffice the needs of the emerging interest in utilizing nanotube, a great concern in creating a stable dispersion of the nanotube in solvent emerged. There is a paramount need to enhance the adhesion between the polymer and carbon nanotube to give a homogenous and stable dispersion throughout the polymer matrix. Thus, oxidative acid treatments are often chosen to chemically functionalize carbon nanotube in order to give such dispersing ability to the nanomaterials. In this study, purified multi-walled carbon nanotubes (MWCNTs) is oxidized under the influence of three types of oxidants i) hydrogen peroxide, ii) citric acid monohydrate and iii) mixture of 3:1 sulphuric and nitric acid. All the MWCNTs suspensions ultrasonicated for 8 hours to create opening defects on the MWCNTs to allow the surface modification to occur. In this comparative study of chemically surface modification using oxidative acid treatments, FTIR was used to examine the formation of -OH, -COOH and -C=O groups on the surface of the MWCNTs, TGA and XRD used to determine the thermal behaviour and the crystal structure studies of the modified MWCNTs respectively.

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