Ionic desorption in PMMA–gamma-Fe2O3 hybrid materials induced by fast electrons: An experimental and theoretical investigation

Rocha, Marcus V. J.; Carvalho, Hudson Wallace Pereira de; Lacerda, Lívia C. T.; Simões, Grazieli; Souza, G. G. B. de; Ramalho, Teodorico C.

doi:10.1016/j.saa.2013.08.029

Cited by 18 publications

(5 citation statements)

References 25 publications

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“…The stabilization of radical species delays the decomposition, as it has been verified in the TG curves displayed in Figure . These theoretical conclusions reinforce the hypothesis of trapping of radical species and ionic desorption by electron impacts derived from previous results .…”

Section: Resultssupporting

confidence: 91%

Structural characterization, thermal properties, and density functional theory studies of PMMA‐maghemite hybrid material

et al. 2014

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Maghemite (g-Fe 2 O 3 )-poly(methyl methacrylate) (PMMA) nanocomposites were prepared by grafting 3-(trimethoxy-silyl) propyl methacrylate on the surface of maghemite nanoparticles, this process being followed by methyl methacrylate radical polymerization. Three different hybrids with 0.1, 0.5, and 2.5 wt% of maghemite nanoparticles were studied. The results indicate that these nanocomposites consist of a homogeneous PMMA matrix in which maghemite nanoparticles with a bimodal size distribution are embedded. The existence of covalent bonding between silane monomers and atoms on the maghemite surface was evidenced. AFM images showed a clear increase in surface roughness for increasing maghemite content. The thermal stability of PMMA-maghemite nanocomposites is higher than that of pure PMMA and increases for increasing maghemite content. The results of our theoretical studies indicate that the electron density in the maghemite nanoparticle is not homogenous,

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Section: Resultssupporting

confidence: 91%

Structural characterization, thermal properties, and density functional theory studies of PMMA‐maghemite hybrid material

et al. 2014

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“…The bond strength of the interface directly affects the stress-transfer capability between the fiber and the matrix, which plays a decisive role in the macroscopic mechanical properties of the composite. 24,25 The ILSS (Z-direction bonding strength) obtained by pulling CF from Z to two layers can be used to measure the interfacial adhesion of CF-based materials from macroscopic mechanical properties. [26][27][28] It can be clearly found that when the CNT content is 20%, the interlayer bonding strength of the composite fiber reaches 1.66 times that of the base fiber.…”

Section: Surface Morphology and Surface Roughness Of Cfmentioning

confidence: 99%

Effect of surface treatment on enhancing interfacial strength of carbon fiber/polyimide composites

2020

Journal of Thermoplastic Composite Materials

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The practical application of carbon fiber (CF)-reinforced polyimide (PI) resin composite was hampered seriously by the poor interfacial adhesion property. In this work, a novel surface treatment agent was designed and prepared to improve the interfacial strength by covalently bonding CF with PI matrix, which is beneficial to the uniform dispersion and impregnation of PI between CF, thereby improving the mechanical properties of CF/PI composites to some extent. The CF was characterized by high surface roughness, which means better wettability by PI. As a result, the interfacial shear strength and interlaminar shear strength of CF/PI composites were enhanced, benefited mainly from the strong and tough interphase.

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“…19 Then, coating PMMA onto the mag-MWCNTs can prepare multifunctional nanoparticles with both the magnetic property of the inner magnetite core and the specic function of the outer polymer shell. 20 Finally, the mag-MWCNTs-MIP composite material was fabricated by a thermal polymerization method using erythromycin as the template molecule, MAA as the functional monomer and EGDMA as the cross-linker. Attachment of Fe 3 O 4 nanoparticles onto the MWCNT surface was achieved by hydrothermal treatment, which resulted in the obtained MWCNTs having outstanding superparamagnetism in this paper.…”

Section: Synthesis Of the Mag-mwcnts-mipsmentioning

confidence: 99%

Fast separation and determination of erythromycin with magnetic imprinted solid extraction coupled with high performance liquid chromatography

et al. 2014

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Ionic desorption in PMMA–gamma-Fe2O3 hybrid materials induced by fast electrons: An experimental and theoretical investigation

Cited by 18 publications

References 25 publications

Structural characterization, thermal properties, and density functional theory studies of PMMA‐maghemite hybrid material

Structural characterization, thermal properties, and density functional theory studies of PMMA‐maghemite hybrid material

Effect of surface treatment on enhancing interfacial strength of carbon fiber/polyimide composites

Fast separation and determination of erythromycin with magnetic imprinted solid extraction coupled with high performance liquid chromatography

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