Application of ultrasonic irradiation as a benign method for production of glycerol plasticized-starch/ascorbic acid functionalized MWCNTs nanocomposites: Investigation of methylene blue adsorption and electrical properties

Abstract

A solution mixing and ultrasonic dispersion method as a green, the fast, inexpensive and effective technique was utilized to prepare glycerol plasticized-starch (GPS)/ascorbic acid (AA)-MWCNTs nanocomposites (NCs) via the introduction of various amounts of AA-MWCNTs (3, 6 and 9wt%) as filler into GPS matrix. The GPS was synthesized by addition of glycerol (50%) as a plasticizer to starch which enhances its flexibility. Characterization of the obtained GPS/AA-MWCNTs NCs was accomplished by different techniques. The optimum filler content for the generation of fine electrical conductivity and good mechanical properties was found to be about 3wt%. The distribution of AA-MWCNTs at the low content (3wt%) in the GPS matrix was better due to the strong linkage between nanofiller and GPS in GPS/AA-MWCNTs NC. The results of adsorption studies showed that the fabricated NC can be a good adsorbent for removal of methylene blue (MB) dye from aqueous solutions.

Characterization of PVC/MWCNTs Nanocomposite: Solvent Blend

“…The spectra showed the main characteristic band of PVC (listed in Table 2), and two characteristic bands (D band and G band) for MWCNTs are also presented. As mentioned in many references [23], the G band is due to the sp2-bond vibration emitted by the carbon atoms in the In Figure 2, C-Cl vibration of PVC presented at 694 and 635 nm. Also, Alkyl (CHn) and D band indicted in 1431 and 1330 cm −1 , respectively.…”

“…This also must be verified without affecting the properties of the filler or the host material. However, this problem can be solved with different techniques, such as the chemical functionalization of CNTs [19][20][21], ultrasonic oscillation [22][23][24], surfactants [22,25,26] and immiscible polymer blends [27][28][29]. Some other techniques such as non-covalent functionalization can be used to modify carbon nanotubes.…”

Effectiveness of six different methods in green synthesis of selenium nanoparticles using propolis extract: Screening and characterization

“…It seems that in the microwave accelerated technique; NPs are mainly produced via heat effect. While, ultrasounication, heat, and high pressure affect the synthesis of inorganic NPs [27,28]. In fact, by passing ultrasonic wave through a solution, a lot of bubbles are generated, grown, and finally collapsed, which cause acoustic cavitation.…”

Graphene Derivatives in Biopolymer-Based Composites for Food Packaging Applications

“…The preparation of biopolymers nanocomposites with GNP [ 152 , 173 , 178 , 179 ], chemically modified rGO [ 145 , 167 , 180 , 181 ], or CNT [ 172 , 174 , 175 , 182 ] reinforcement has exhibited significant enhancements in the mechanical properties of chitosan, PLA, alginate, PHBV, cellulose nanofibers, and starch even at very low concentrations (<5%), as described in Table 1 . The Young’s modulus, tensile strength, and elongation at break are increased with the incorporation of the diverse graphene derivatives as fillers.…”