Multiwalled carbon nanotubes grafted with polyamidoamine (PAMAM) dendrimers and their influence on polystyrene supercritical carbon dioxide foaming

Yang, Jintao; Huang, Linqi; Zhou, Yunguo; Chen, Feng; Zhong, Ming

doi:10.1016/j.supflu.2013.06.001

Cited by 13 publications

(7 citation statements)

References 35 publications

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“…

Δ H_{m}^{0}

is the enthalpy of 100% crystalline UHMWPE sample, which is 291 J/g for the UHMWPE sample used in this study. Table indicates that the crystallinity of UHMWPE matrix was promoted with the addition of PAMAM dendrimer (G1) and its QASs, this may attributed to the effect of heterogeneous nucleation . However, when the CTAB was added, there was no obvious difference in crystallinity.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Improved crystallizability and processability of ultra high molecular weight polyethylene modified by poly(amido amine) dendrimers

Kuang

Chang

et al. 2016

Polym Eng Sci

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Ultrahigh molecular weight polyethylene (UHMWPE) is usually difficult to be melt processed due to severe intermolecular entanglement in its melt. In this work, we reported the development of a poly(amido amine) (PAMAM) dendrimer (G1) and its derivatives with different terminal groups which showed promising feasibility for aiding UHMWPE melt processing. The rheological, crystalline, and mechanical properties of the blends were investigated comprehensively. The addition of the dendritic modifiers to the UHMWPE matrix resulted in a significant decrease in melt viscosity, thus an obvious enhancement of the processability. The dynamic analysis of the mechanical properties and rotation‐rheological test indicated a disentanglement effect of the UHMWPE melt molecules was generated by the PAMAM dendrimer (G1) and its derivatives. Furthermore, the PAMAM dendrimer (G1), as an internal lubricant, was uniformly distributed in the UHMWPE matrix. The heteronucleation effect of the PAMAM dendrimer (G1) with its derivatives led to a higher degree of crystallinity, smaller crystallites in the matrix and enhanced tensile strength in the UHMWPE blends. POLYM. ENG. SCI., 57:153–160, 2017. © 2016 Society of Plastics Engineers

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“…

Δ H_{m}^{0}

Section: Resultsmentioning

confidence: 99%

“…PAMAM dendrimer and PAMAM dendrimer‐quaternary ammonium salt (QAS, include lauryl and stearyl) were prepared by the method described in our previous reports (Supporting Information Figs. S1 and S2) . The chemical structures of the PAMAM dendrimer (G1) and its derivatives, and CTAB, are shown in Scheme .…”

Section: Methodsmentioning

confidence: 99%

Improved crystallizability and processability of ultra high molecular weight polyethylene modified by poly(amido amine) dendrimers

Kuang

Chang

et al. 2016

Polym Eng Sci

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“…9,10 Consequently, foam density and cell morphology are more difficult to control, and this has an unfavorable inuence on nal properties of the foaming products. [11][12][13] Presently, several methods for CO 2 as a physical blowing agent have been developed to improve foam performance by controlling the foaming processes: (1) employing a co-blowing agent, 14 (2) adding inorganic particles, 15 (3) graing groups, 16 (4) inducing two or more foaming stage processes, 17 (5) generating a particular cellular structure, 18 and (6) using a polymer blending system. 19 Richard et al studied the PS foaming process with a mixture of CO 2 and ethanol (EtOH).…”

Section: Introductionmentioning

confidence: 99%

Fine dispersion morphology of polystyrene/poly(ethylene terephthalate glycol) blending generation for controlled foaming behavior

Wang

Jiao

et al. 2017

RSC Adv.

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“…This study aims to syntheze CdS nanoparticles (NPs) by using SC CO 2 . [15][16][17][18][19][20][21][22] This paper reports that CdS NPs can be synthesized using SC CO 2 and discusses the effects of experimental conditions, such as cadmium and sulfide source, on the morphology and dimension of the products. Raman and photoluminescence (PL) spectra were used to examine the optical properties of the nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Photoelectrochemical Properties of CdS Nanoparticles Using Supercritical Carbon Dioxide

Yan¹,

Liu²,

Wei³

et al. 2016

j nanosci nanotechnol

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Cadmium sulfide nanoparticles (CdS NPs) that have gas-like diffusivity, low viscosity, and near-zero surface tension were synthesized using supercritical CO 2 (SC CO 2 . The resulting CdS NPs were characterized via field-emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy, and photoluminescence spectroscopy. This paper reports the effects of experimental conditions (e.g., cadmium source and sulfide source) on the morphology and dimension of the products. The photo-current density of CdS NPs increased by at least three times when the same voltage used in photoelectrochemical water splitting was applied. The capability of making highly photoactive CdS NPs opens up new opportunities in various areas, including photoelectrochemical (PEC) water splitting, dye-sensitized solar cells, and photocatalysis.

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Multiwalled carbon nanotubes grafted with polyamidoamine (PAMAM) dendrimers and their influence on polystyrene supercritical carbon dioxide foaming

Cited by 13 publications

References 35 publications

Improved crystallizability and processability of ultra high molecular weight polyethylene modified by poly(amido amine) dendrimers

Improved crystallizability and processability of ultra high molecular weight polyethylene modified by poly(amido amine) dendrimers

Fine dispersion morphology of polystyrene/poly(ethylene terephthalate glycol) blending generation for controlled foaming behavior

Preparation and Photoelectrochemical Properties of CdS Nanoparticles Using Supercritical Carbon Dioxide

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