Facile Approach for Superparamagnetic CNT-Fe₃O₄/Polystyrene Tricomponent Nanocomposite via Synergetic Dispersion

Abstract

A facile one-pot in-situ radical bulk polymerization strategy was developed for preparation of the superparamagnetic multiwalled carbon nanotubes-Fe 3 O 4 /polystyrene (CNT-Fe 3 O 4 /PS) tricomponent nanocomposite by the synergetic dispersion strategy via the multiwalled carbon nanotubes (CNT) immobilized Fe 3 O 4 nanoparticles (CNT-Fe 3 O 4 ) with oleic acid (OA) as surface modifier. Compared with the tricomponent nanocomposite prepared with the multiwalled carbon nanotubes and Fe 3 O 4 nanoparticles added separately, immobilization of Fe 3 O 4 nanoparticles on multiwalled carbon nanotubes could avoid efficiently aggregation of the Fe 3 O 4 nanoparticles in polymer matrices. OA molecules adsorb onto the surfaces of the Fe 3 O 4 nanoparticles immobilized on the multiwalled carbon nanotubes, improving efficiently the dispersibility of the multiwalled carbon nanotubes in styrene, which resulted in the well-dispersed CNT-Fe 3 O 4 /PS tricomponent nanocomposite.

Fabrication and electromagnetic properties of flowerbud-like CNT-CuPc/Fe 3 O 4

“…19-0629 [27]. Therefore, the above analyses indicate that the product is composed of two phases: cubic Fe 3 O 4 and CNT-CuPc, which accords with the results of FT-IR [21]. To further demonstrate the chemical composition, XPS survey scan in Fig.…”

“…But most final products have analogous morphology and the relative poor electromagnetic properties [17,18]. For example, the previous work shows that CNT/ Fe 3 O 4 has been fabricated successfully and reveals good morphology [19][20][21][22][23]. Nevertheless, the electromagnetic properties are still relative poor such as the narrow absorption bandwidth and low absorption intensity.…”

Green and facile approach for enhancing the inherent magnetic properties of carbon nanotubes for water treatment applications

“…The spectroscopic analysis shows that the particles responsible for the magnetic response are in the interior of tubes, sequestered from degradation as the material is recycled. Thus, the adsorption capacity and collection efficiency of our MCNTs, as prepared in this work, are not degraded with time as in other synthesis methods reported in the literature [61–63]. This finding suggests that MCNT’s with internally decorated magnetic particles show great potential for use in large scale processes because they are easily recycled.…”

Low temperature one‐step synthesis of poly(barbituric acid) functionalized magnetic nanoparticles for removal of heavy metal ions

“…For the PBA‐MNPs, there is a decrease in the magnetization, which is related to the decrease in the content of the MNPs in the nanocomposite. The mass radio of Fe 2 O 3 MNPs content in PBA‐MNPs is calculated from the equation: where σ nanocomposite is the magnetization of PBA‐MNPs and σ MNPs is the magnetization of bare Fe 2 O 3 MNPs at 5 kOe and room temperature. The amount of magnetic material is found to be about 26.9 wt % calculated from the saturation magnetization of PBA‐MNPs.…”