Facile hydroxylation of halloysite nanotubes for epoxy nanocomposite applications

Zeng, Songshan; Reyes, Christopher; Liu, Jingjing; Rodgers, Paul; Wentworth, Samuel H.; Sun, Luyi

doi:10.1016/j.polymer.2014.10.044

Cited by 125 publications

(74 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the influences of the dispersal schemes and MWCNT loadings on the storage modulus are pronounced that the epoxy system is stiffened with the higher MWCNT concentrations. The reinforcing effect of nanomaterials on epoxy has been commonly reported in the literature . The epoxy system with 1 wt% MWCNTs dispersed by Scheme 2 possessed the highest storage modulus, followed by the one with the 0.1 wt% loading by Scheme 2.…”

Section: Resultsmentioning

confidence: 68%

Effect of the addition of multi-walled carbon nanotubes on the thermomechanical properties of epoxy resin

2015

View full text Add to dashboard Cite

The influence of multi‐walled carbon nanotubes (MWCNTs) on thermosetting epoxy is examined using dynamic mechanical analysis, thermogravimetric analysis, and differential scanning calorimetry (DSC). Specimens are prepared with loadings of 0.1 and 1 wt% MWCNTs which are dispersed in the resin using two different dispersion methods. While the storage modulus of the specimens is improved, both the glass transition temperature and the thermal stability are reduced by the addition of MWCNTs with both effects being greater for the higher MWCNT loading, for both dispersion systems. The DSC results additionally indicate that the level of residual unreacted epoxy increases progressively with the addition of the nanotubes. This finding is considered as confirmation that the MWCNTs obstruct crosslinking of the epoxy resin. POLYM. COMPOS., 38:1873–1880, 2017. © 2015 Society of Plastics Engineers

show abstract

Section: Resultsmentioning

confidence: 68%

Effect of the addition of multi-walled carbon nanotubes on the thermomechanical properties of epoxy resin

2015

View full text Add to dashboard Cite

show abstract

“…However, it is clearly illustrated that further addition (more than 0.3 wt%) of GO and FGOs cannot considerably improve tensile strength. This could be explained by the agglomeration of nanoparticles [22]. The GO reinforced epoxy composites show the obviously enhanced tensile strength due to the fact that the interfacial bonding between CFs and epoxy has been improved by the GO addition.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Preparation and characterization of functionalized graphene oxide/carbon fiber/epoxy nanocomposites

2015

View full text Add to dashboard Cite

a b s t r a c tGraphene oxide (GO) was functionalized using three different diamines, namely ethylenediamine (EDA), 4,4 0 -diaminodiphenyl sulfone (DDS) and p-phenylenediamine (PPD) to reinforce an epoxy adhesive, with the aim of improving the bonding strength of carbon fiber/epoxy composite. The chemical structure of the functionalized GO (FGO) nanosheets was characterized by elemental analysis, FT-IR and XRD. Hand lay-up, as a simple method, was applied for 3-ply composite fabrication. In the sample preparation, the fiber-to-resin ratio of 40:60 (w:w) and fiber orientations of 0 , 90 , and 0 were used. The GO and FGO nanoparticles were first dispersed in the epoxy resin, and then the GO and FGO reinforced epoxy (GO-or FGO-epoxy) were directly introduced into the carbon fiber layers to improve the mechanical properties. The GO and FGO contents varied in the range of 0.1e0.5 wt%. Results showed that the mechanical properties, in terms of tensile and flexural properties, were mainly dependent on the type of GO functionalization followed by the percentage of modified GO. As a result, both the tensile and flexural strengths are effectively enhanced by the FGOs addition. The tensile and flexural moduli are also increased by the FGO filling in the epoxy resin due to the excellent elastic modulus of FGO. The optimal FGO content for effectively improving the overall composite mechanical performance was found to be 0.3 wt%. Scanning electron microscopy (SEM) revealed that the failure mechanism of carbon fibers pulled out from the epoxy matrix contributed to the enhancement of the mechanical performance of the epoxy. These results show that diamine FGOs can strengthen the interfacial bonding between the carbon fibers and the epoxy adhesive.

show abstract

“…During the preparation of HNTs-polymeric nanocomposites, the interfacial adhesion between the HNT phase and polymer is not ideal due to the low concentration of polar functional groups on the external surface of HNTs, since the density of hydroxyl groups on the external surface of HNTs is much lower than that of alumina lumen. Thus, the surface functionalized by alkali treatment with sodium hydroxide, creating a high density of hydroxyl groups on the external surface of HNTs leading to a much higher level of dispersion of HNTs in water and organic polar solvents [39]. Many applications for HNTs are constrained by the size of the lumen.…”

Section: [Tabela II -Exemplos De Processos De Purificação Modificaçãmentioning

confidence: 99%

Halloysite nanotubes-polymeric nanocomposites: characteristics, modifications and controlled drug delivery approaches

2017

View full text Add to dashboard Cite

Halloysite nanotubes (HNTs) are aluminosilicate nanoclay mineral which have a hollow tubular structure and occurs naturally. They are biocompatible and viable carrier for inclusion of biologically active molecules due to the empty space inside the tubular structure. In this article, the HNTs main characteristics, and the HNTs-polymeric nanocomposite formation and their potential application as improvement of the mechanical performance of polymers and entrapment of hydrophilic and lipophilic substances are summarized. Recent works covering the increment of HNTs-polymeric nanocomposites and presenting promising employment of these systems as nanosized carrier, being suitable for pharmaceutical and biomedical applications, based on earlier evidence in literature of its nature to sustain the release of loaded drugs, presenting low cytotoxicity, and providing evidence for controlled drug delivery are reviewed. Keywords: nanoclay, bio-nanocomposites, functionalization, sustained drug release, nanotechnology. Resumo Nanotubos de haloisita (NTH) são nanoargilas de silicato de alumínio com estrutura naturalmente tubular. Eles são biocompatíveis e apresentam viabilidade como carreador de moléculas biologicamente ativas devido ao seu espaço interno na estrutura tubular. Neste artigo as principais características dos NTH e a obtenção de nanocompósitos poliméricos com NTH, e suas potenciais aplicações para o aperfeiçoamento das propriedades mecânicas dos polímeros

show abstract

Facile hydroxylation of halloysite nanotubes for epoxy nanocomposite applications

Cited by 125 publications

References 69 publications

Effect of the addition of multi-walled carbon nanotubes on the thermomechanical properties of epoxy resin

Effect of the addition of multi-walled carbon nanotubes on the thermomechanical properties of epoxy resin

Preparation and characterization of functionalized graphene oxide/carbon fiber/epoxy nanocomposites

Halloysite nanotubes-polymeric nanocomposites: characteristics, modifications and controlled drug delivery approaches

Contact Info

Product

Resources

About