Effect of silver nanoparticles on structural, thermal, electrical, and mechanical properties of poly(vinyl alcohol) polymer nanocomposites

Abstract

This paper presents the in‐situ chemical synthesis of silver nanoparticles (AgNPs) with glycerol embedded in poly(vinyl alcohol) (PVA) to synthesize (PVA/AgNPs) polymer nanocomposites with different volume percentages of AgNPs (2, 4, and 6) %v/v. X‐ray diffractometer shows the (200) plane of AgNPs, which appeared at 44.82° in PVA/(2, 4, and 6) %v/v AgNPs films. However, the (111), (220), and (311) planes at 2θ (37.55°, 65.08°, and 77.45°) respectively appeared in PVA with 6%v/v AgNPs only. Fourier transform infrared spectroscopy spectrum of AgNPs shows a COC peak at 1273 cm−1 which is attributed to the stronger affinity of AgNPs on the COC bonds in the PVA matrix. The scanning electron microscope confirmed that all nanoparticles are open‐spherical or near‐spherical in shape. Differential scanning calorimetry shows the decrease in glass transition and melting temperature of pure PVA from 64.62° and 185.54° to 53.09° and 182.35° after the incorporation of AgNPs. Thermogravimetric analysis shows the reduction of thermal stability of PVA/AgNPs films when compared to pure PVA. The electrical conductivity of PVA/AgNPs films increased with the addition of AgNPs. From Mechanical studies, the values of Young's modulus, yield strength, and ultimate tensile strength decreased with increasing AgNPs volume percentage.

Hybrid polymer nanocomposites with tailored band gaps and UV absorption for advanced applications in optoelectronics and UV protection

“…As revealed by Figure 3C, upon irradiation with fast neutrons at a fluence of 6.48 × 10 9 cm −2 , the diminished peak corresponding to PVA indicates structural variations in the polymeric network of NCs. Furthermore, one can notice the appearance of new peaks at 2θ = 9.34° (GO) 33 and 38.28°(Ag) 34 due to the enhanced orderly arrangement of GO and Ag as a result of neutron irradiation. This might also be due to decrease in the crystallinity of the polymeric matrix, enhancing the crystallite structure of fillers and enabling them to produce diffraction peaks.…”

Optical transparency of electrospun nanofibrous membranes: A study on influencing parameters

“…8 Furthermore, the transparent nanofibers can be applied as an anti-reflective coating layer in the outer surface of a solar cell which maximize incoming light by reducing reflections for enhancing the energy conversion efficiency. [9][10][11][12] In general, the strategies of fabricating transparent electrospun nanofibrous membrane include (1) using polymers with intrinsic transparency as precursor;…”

Preparation and characterization of novel boron containing nanocomposites with neutron radiation shielding properties

“…6,7 In the literature, PVA/PVP/PEG (polyethylene glycol) blends are mostly used in applications such as optoelectronics and photonics with different metal compounds, oxides, or complexes. 8,9 However, with the use of highermolecular-weight PEO instead of PEG, it is quite possible to use this mixture in the field of nuclear radiation, which has proven itself with its superior properties such as high miscibility, biocompatibility, film-forming ability, mechanical and thermal stability, and workability. As it is well known, with the rapid increase in the application areas such as energy, medicine therapy, and military of nuclear technology, the demand for radiation shielding is increasing day by day.…”