Carboxymethyl Tamarind-g-poly(acrylamide)/Silica: A High Performance Hybrid Nanocomposite for Adsorption of Methylene Blue Dye

Abstract

Here, synthesis of an efficient nanocomposite based on a polyacrylamide grafted carboxymethyl tamarind (CMT-g-PAM) and a SiO2 nanoparticle is presented. The synthesized nanocomposites are characterized using FT-IR, SEM, TEM, 13C NMR, elemental analysis, viscosity, rheological measurement, and molecular weight determination. Various characterizations reveal the existence of an excellent polymer matrix–nanoparticle interaction, which is at a maximum when 1.5 wt % of SiO2 is introduced in the polymer matrix (i.e., CMT-g-PAM/SiO2-3). Nanocomposites show tremendous methylene blue (MB) dye adsorption capacity, because of their higher hydrodynamic radius as well as hydrodynamic volume, which originates from proper polymer matrix–SiO2 nanoparticle interaction. CMT-g-PAM/SiO2-3 exhibited a maximum adsorption capacity (Q max) of 43.859 mg·g–1. The adsorption behavior of the nanocomposite shows that adsorption kinetics and isotherms are in good agreement with pseudo-second-order and Langmuir equations, respectively. Negative values of ΔG° confirmed the spontaneous nature of adsorption. Further, desorption experiments affirmed that the developed nanocomposite has excellent regenerative efficacy.

A study of effect of injection molding process parameters on the impact performance of plastic product fabricated by fine fillers filled LDPE

“…For the sake of acquiring better injection molding processing parameters, response surface methodology was used to further process the experimental data [13][14]. The factor of filling time was not considered during developing the model as it has the least effect on impact performance by means of orthogonal analyzing.…”

Evaluation of polyacrylamide-grafted-polyethylene glycol/silica nanocomposite as potential additive in water based drilling mud for reactive shale formation

“…When the amount of PEG (>1.8 g) was increased, the yield of product was found to be low. This may be due to improper grafting process in presence of excess PEG molecules in the solution (Ghorai et al, 2013;Ray and Bousmina, 2005;Pal et al, 2012). Finally, the synthesized nanocomposite having 0.125 wt% silica and 1.8 g PEG was used as an additive in the developed drilling mud system.…”

Core-Shell MnO2-SiO2 Nanorods for Catalyzing the Removal of Dyes from Water

“…Dye molecules can be entrapped in silica nanoparticles and films [11][12][13][14]. Silica-based materials, carboxylic acid-functionalized silica [15,16], silica-alumina oxide [17], silica hydrogels [18], mesoporous silica [19,20], and carboxymethyl tamarind-g-poly(acrylamide)/silica [21] have been investigated as adsorbents for removing dyes from wastewater. Except for the physical adsorption methods, removing dyes can be accomplished through oxidation, such as electrooxidation [22], photocatalytic degradation [23], and oxidation by graphene oxide nanosheet-based material [24].…”