Carbon Nanotube-Adsorbed Polystyrene and Poly(methyl methacrylate) Microspheres

Jin, Hyoung‐Joon; Choi, Hyoung Jin; Yoon, Seok Ho; Myung, and Seung Jun; Shim, Sang Eun

doi:10.1021/cm050500x

Cited by 148 publications

(105 citation statements)

References 58 publications

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“…When the PU was added to the nanotubes, the surfactant molecules could serve as a link between the nanotubes and polymers, providing hydrophobic interactions that can enhance the contact at the interface. [36] The stress-strain profiles for pure PU and PU/MWNTs composites are illustrated in Figure 11. The tensile strength and modulus were calculated from the stressstrain profiles and are shown in Figure 12.…”

Section: Resultsmentioning

confidence: 99%

Effect of Functionalized Carbon Nanotubes on Molecular Interaction and Properties of Polyurethane Composites

Sahoo

Jung

Yoo

et al. 2006

Macro Chemistry & Physics

166

121

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Summary: Functionalized MWNTs were incorporated into PU by solution mixing to improve the mechanical and thermal properties of composites. A homogeneous dispersion of MWNTs was successfully achieved in PU matrix as evidenced by scanning electron microscopy. It may be attributed to the hydrogen bonds existing between CO groups of hard segments of PU chains and COOH groups of the MWNT‐COOH. The incorporation of the MWNTs effectively enhanced the crystallization of the PU matrix through heterogeneous nucleation, and the nucleation effect was more evident at 10 wt.‐% functionalized MWNTs as compared to other composite systems. Mechanical properties of the PU‐MWNTs composites were assessed as a function of MWNT concentration and dispersion of MWNT in PU matrix. The most significant improvement in mechanical properties was obtained, e.g., 740% increase in modulus and 180% increase in tensile strength over pure PU with 20% MWNT content. The thermal stability of composites due to thermal gravimetric measurements was significantly improved.A possible interaction of H‐bonding existed between PU chain and MWNT‐COOH.magnified imageA possible interaction of H‐bonding existed between PU chain and MWNT‐COOH.

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Section: Resultsmentioning

confidence: 99%

Effect of Functionalized Carbon Nanotubes on Molecular Interaction and Properties of Polyurethane Composites

Sahoo

Jung

Yoo

et al. 2006

Macro Chemistry & Physics

166

121

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“…The results of Table 2 showed that the element of P, N still remains in the final chars after combustion, indicating the excellent carbonization ability of PDSPB. Comparing other functionalized carbon nanotubes by organic substance such as PS [23] and PMMA [39] which are easy to burn out after combustion, the grafting of intumescent flame retardant (PDSPB) can improve dispersion and also flame retardancy. …”

Section: Flammabilitymentioning

confidence: 99%

Functionalizing Carbon Nanotubes by Grafting on Intumescent Flame Retardant: Nanocomposite Synthesis, Morphology, Rheology, and Flammability

Tong

et al. 2008

Adv Funct Materials

234

150

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An intumescent flame retardant, poly(diaminodiphenyl methane spirocyclic pentaerythritol bisphosphonate) (PDSPB) has been covalently grafted onto the surfaces of multiwalled carbon nanotubes (MWNTs) to obtain MWNT‐PDSPB and according nanocomposites were prepared via melt blending. After high density PDSPB (65 wt %) were attached to the MWNTs, core‐shell nanostructures with MWNTs as the hard core and PDSPB as the soft shell were formed. The resultant MWNT‐PDSPB was soluble and stable in polar solvents, such as DMF. The optical microscopy and TEM results showed that the functionalized MWNTs can achieve better dispersion in ABS matrix. The linear viscoelastic behavior indicated that MWNT‐PDSPB can form network structure at very low nanotube loading than un‐functionalized MWNTs. The results of flammability showed that better flame retardancy was obtained for ABS/MWNT‐PDSPB nanocomposites due to the better dispersion of MWNT‐PDSPB in ABS matrix. The flammability of the composites is strongly dependent on the network structure of nanotubes which reduces the diffusion of volatile combustible fragments generated by polymer degradation which diffuse towards the surface of the burning polymer to evaporate to feed the flame. The grafting of intumescent flame retardant of PDSPB can improve both the dispersion of nanotubes in polymer matrix and flame retardancy of the nanocomposites.

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“…[12][13][14][15] In the traditional ''graft to'' method, sonochemical treatment is used to introduce reactive sites on the SWNTs surface.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of PEGylated single wall carbon nanotubes by a photoinitiated graft from polymerization

Zhang

Henthorn

2009

AIChE Journal

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A considerable amount of research has been devoted to carbon nanotubes because of their unique electrical, mechanical, optical, and chemical properties. Here, in this report, we introduce a novel, simple ultraviolet initiated ''graft from'' polymerization method to synthesize PEGylated carbon nanotubes. This grafting procedure significantly enhanced nanotube aqueous dispersibility and long term stability in solution. Mass of grafted polymer chains was easily modulated by adjusting polymerization reaction time, and nanomaterials containing up to 80% polymer by weight were synthesized. Nanotube morphology was characterized by SEM, TEM before and after the functionalization. In addition, the covalent bonding of polymer chains to the nanotubes structure was elucidated by Raman, ATR-FTIR, and XPS spectroscopy.

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Carbon Nanotube-Adsorbed Polystyrene and Poly(methyl methacrylate) Microspheres

Abstract: Monodisperse and spherical PS and PMMA microspheres, which are only conducting on the surface by the adsorption of carbon nanotubes, were used as the dispersed phase of electrorheological fluids.

Cited by 148 publications

References 58 publications

Effect of Functionalized Carbon Nanotubes on Molecular Interaction and Properties of Polyurethane Composites

Effect of Functionalized Carbon Nanotubes on Molecular Interaction and Properties of Polyurethane Composites

Functionalizing Carbon Nanotubes by Grafting on Intumescent Flame Retardant: Nanocomposite Synthesis, Morphology, Rheology, and Flammability

Synthesis of PEGylated single wall carbon nanotubes by a photoinitiated graft from polymerization

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