Effect of chemical functionalization of multi-walled carbon nanotubes with 3-aminopropyltriethoxysilane on mechanical and morphological properties of epoxy nanocomposites

Kathi, John; Rhee, Kyong-Yop; Lee, Joong Hee

doi:10.1016/j.compositesa.2009.04.001

Cited by 186 publications

(100 citation statements)

References 29 publications

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“…promotes the formation of functional groups at the nanotube surface, which may react with the functional groups of the organic polymer forming permanent bonds [4,5,[15][16][17]. Among the most frequent functionalization techniques reported to improve mechanical properties of CNT-thermosetting polymer composites are oxidations [5,[15][16][17][18] and amine based treatments [5,13,19,20], while CNT silanization has been less reported in the open literature [21][22][23][24][25]. Although silane treatments are quite common for micron-size fiber-reinforced polymers, such treatments have not been thoroughly examined for CNTs.…”

Section: Introductionmentioning

confidence: 99%

“…Although silane treatments are quite common for micron-size fiber-reinforced polymers, such treatments have not been thoroughly examined for CNTs. Pioneering efforts on CNT silanization for epoxy nanocomposites have been conducted by the groups of Ma and coworkers [22,25] and Kathi and Rhee and coworkers [23,24,26]. Ma et al [25] reported a three-step procedure to functionalize multi-wall carbon nanotubes (MWCNTs) based on oxidation by UV light, reduction with LiAlH 4 and finally nanotube silanization.…”

Section: Introductionmentioning

confidence: 99%

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Oxidation and silanization of MWCNTs for MWCNT/vinyl ester composites

Avilés¹,

Cauich-Rodríguez

Rodríguez‐González

et al. 2011

Express Polym. Lett.

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Abstract. Chemical functionalization of multi-wall carbon nanotubes (MWCNTs) is conducted by means of acid oxidation, direct silanization of the as-received MWCNTs and a sequential treatment based on oxidation and silanization. Polymer composites made from the functionalized MWCNTs and a vinyl ester resin are fabricated and tested in compression. It is found that although silanization could be achieved without the assistance of a previous oxidative treatment, oxidizing the MWCNTs by HNO 3 /H 2 O 2 prior to silanization yields significantly better attachment of the silane molecules to the CNT surface and hence, better mechanical performance of the resulting composite. The limited improvements in mechanical properties found are discussed in light of the reduction of the nanotube length after MWCNT oxidation and composite processing.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Oxidation and silanization of MWCNTs for MWCNT/vinyl ester composites

Avilés¹,

Cauich-Rodríguez

Rodríguez‐González

et al. 2011

Express Polym. Lett.

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“…A flexible organic layer was introduced on the surfaces of MWCNTs by combining Si-O-C bonds with Si-O-Si bonds. Thus, a large stereo-hindrance effect between the nanotubes was induced to prevent the aggregation of MWCNTs [22]. As shown in Fig.…”

Section: Morphology Of Unmodified and Modified Mwcntsmentioning

confidence: 93%

The effects of surface modifications of multiwalled carbon nanotubes on their dispersibility in different solvents and poly(ether ether ketone)

et al. 2014

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The effects of surface modifications of multi-walled carbon nanotubes (MWCNTs) on their dispersibility in different solvents and poly (ether ether ketone) (PEEK) have been studied. MWCNTs were treated by mixed acids to obtain acid-functionalized MWCNTs. The acid-functionalized MWCNTs were modified with six different chemical agents separately, 1,6-diaminohexane, hexadecyl trimethyl ammonium bromide, silane coupling agent 3-aminopropyltriethoxysilane, anhydrous sulfanilic acid and ethanolamine. MWCNT/PEEK composite films were fabricated in order to explore systematically the dispersibility of differently modified MWCNTs in PEEK as well as in different solvents. The morphology and structures of MWCNTs and the compatibility between MWCNTs and PEEK have been investigated. It was observed that the MWCNTs modified with anhydrous sulfanilic acid have an excellent dispersion in the PEEK grafted by sulfonic acid groups and that the MWCNTs modified with ethanolamine are also dispersed well in pure PEEK. The results herein provide useful insights into the development of MWCNT/PEEK composites for a wide variety of applications.

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“…Silanized or silica-coated nanotubes can not only improve the interfacial adhesion between the CNTs and matrix and the resulting dispersion of CNTs in epoxy matrix,but also improve the composite's mechanical properties [25][26][27]. Although these studies showed a functional layer on the CNTs surface, providing a predicted reinforcement and improvement of thermal conductivity and electrical resistivity, the influence of the silica coating at the CNT surface on the curing behavior is still not well understood.…”

Section: Introductionmentioning

confidence: 99%

“…The common advantage of CNTs being electrically conductive is no longer desired. A facile method for improving thermal conductivity while retaining high electrical resistivity is to incorporate silica-coated carbon nanotubes (CNTs@SiO 2 ) into the epoxy system [9,[24][25]. Silica has been widely used as a filler in electronic packaging material.…”

Section: Introductionmentioning

confidence: 99%