Development and Material Properties of Chitosan and Phosphomolybdic Acid-based Composites

Abstract

This work reports the development and characterization of chitosan/ phosphomolybdic acid-based composite membranes. The prepared composite membranes were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), differential scanning calorimetry (DSC), tensile strength test, and thermogravimetric analysis (TGA). FTIR spectroscopy indicated the proper molecular interactions between chitosan and PMA. XRD spectroscopy indicated the semi crystalline nature of the composite membranes. DSC study showed the presence of single glass transition temperature (T g ) at 156 C in the 20% PMA-doped membrane, which indicates the miscible nature of chitosan and PMA blend. TGA study indicates increase in thermal stability of the composite membranes as compared to pure chitosan. Mechanical properties of the composite membranes were found to be enhanced significantly.

Facile synthesis of chitosan derivatives and Arthrobacter sp. biomass for the removal of europium(III) ions from aqueous solution through biosorption

“…The final degradation of the chitosan biosorbents occurs between the range of 575e785 C, and this stage was indicative of the degree of deacetylation of chitosan (Okuyama et al, 2000;Kittur et al, 2002;Hall, 2006). In R iii this final degradation resulted in higher char yields for the chitosan beads than the chitosan powder, indicating that the crosslinking and subsequent bead formation stage increased the thermal stability of chitosan by~4 wt% (Bhat et al, 2011).…”

“…Chitin can be isolated from the crustacean composition and subjected to deacetylation to produce chitosan. Chitosan is the second most abundant biopolymer, which is environmentally friendly, biodegradable and non-toxic (Kittur et al, 2002;Bhat et al, 2011;Ngah et al, 2011). The chemical composition of chitosan enables it to be modified chemically, through available functional groups, which allow chitosan to be tailored in a variety of morphologies including membranes, gels, beads and powder etc.…”

Novel Improvements in Thermal and Hydrophobic Properties of Chitosan Reinforced by Rice Husk Ash

“…In this pH range the amine groups mainly exist in the form of NH 3 + and convert chitosan into a polycationic chain. The degree of deacetylation (DA) is referred to as the ratio of glucosamine to N-acetylglucosamine, which can vary from 0 to 1 [1,2].…”

Fabrication of Eco-Friendly Polyelectrolyte Membranes Based on Sulfonate Grafted Sodium Alginate for Drug Delivery, Toxic Metal Ion Removal and Fuel Cell Applications

“…Prestine PEMs have exhibited semi crysttaline peaks at 2θ of 20° [ 49 ]. From Figure 2 A, PMA exhibitted characteristic crystalline peaks at 22, 27, 33 and 37 for (210), (221), (311) and (321), respectively [ 50 ]. However, PMA incorporated PEMs are not shown such crysttaline peaks, which indicates that PMA is molecularly dispersed in PEMs.…”