Synthesis and investigation of SiO2-MgO coated MWCNTs and their potential application

Abstract

In the present publication, multiwalled carbon nanotubes (MWCNT) coated with SiO2–MgO nanoparticles were successfully fabricated via sol–gel method to facilitate their incorporation into polymer matrices. Magnesium acetate tetrahydrate and tetraethyl orthosilicate were used as precursors. The coated MWCNTs were characterized by transmission electron microscopy (TEM), X–ray diffraction (XRD) and Raman spectroscopy methods. These investigation techniques verified the presence of the inorganic nanoparticles on the surface of MWCNTs. Surface coated MWCNTs were incorporated into polyamide (PA), polyethylene (PE) and polypropylene (PP) matrices via melt blending. Tensile test and differential scanning calorimetry (DSC) investigations were performed on SiO2–MgO/MWCNT polymer composites to study the reinforcement effect on the mechanical and thermal properties of the products. The obtained results indicate that depending on the type of polymer, the nanoparticles differently influenced the Young’s modulus of polymers. Generally, the results demonstrated that polymers treated with SiO2-MgO/MWCNT nanoparticles have higher modulus than neat polymers. DSC results showed that nanoparticles do not change the melting and crystallization behavior of PP significantly. According to the obtained results, coated MWCNTs are promising fillers to enhance mechanical properties of polymers.

Review of Characteristics and Properties of Fe2o3/Sio2 as Water Pollution Prevention

“…These observations indicate that the MWCNT dispersion increases in the polymer matrix. It verifies our proposition that different types of fillers have different effects on mechanical properties [80] SiO2 nanocubes Two-step hardtemplate growth…”

Surface-mediated twin polymerisation of 2,2′-spirobi[4H-1,3,2-benzodioxasiline] on multi-walled carbon nanotubes, polyacrylonitrile particles and copper particles

“…6–17 This process offers the possibility for avoiding phase separation and it is well suited for surface coating, 18–23 thus providing a complementary process to the simultaneous polymerization of common monomers in combination with established sol–gel processes or related procedures. 24–30…”

Tribological Characteristics of Carbon Nanotubes‐Reinforced Plasma‐Sprayed Al2O3‐TiO2 Ceramic Coatings

“…Agglomeration of powders during blending is avoided using hardened steel balls in the ball milling chamber. It has been learned that up to 5 wt% SiO 2 -MgO-coated MWCNTs were added with polymer for coating purposes [27].…”