High-Performance Aminated Poly(phenylene sulfide)/ZnO Nanocomposites for Medical Applications

Abstract

An aminated poly­(phenylene sulfide) derivative (PPS-NH2) has been melt-blended with different contents of ZnO nanoparticles, and the morphology, thermal, mechanical, tribological, antibacterial, and dielectric properties of the resulting nanocomposites have been investigated. The nanoparticles were dispersed within the matrix without the need for surfactants or coupling agents. A gradual rise in the crystallization temperature and the degree of crystallinity was found with increasing ZnO loading, confirming that the nanoparticles act as nucleating agents for PPS-NH2 crystallization. The nanoparticles reduced the water absorption and strongly increased the thermal stability of the matrix, leading to an extraordinary increase in the initial degradation temperature of 80 °C at 8.0 wt % nanoparticle content. The results showed that the stiffness, strength, toughness, glass transition, and heat distortion temperature were remarkably enhanced, whereas the coefficient of thermal expansion decreased upon addition of ZnO, ascribed to strong hydrogen bonding interactions between the amino groups of the matrix and the hydroxyl moieties of the nanoparticles. Moreover, the nanocomposites retained the tensile properties after being exposed to several cycles of steam sterilization. More importantly, an unprecedented drop in wear rate of nearly 100-fold was attained in the nanocomposite with the highest loading, demonstrating the suitability of these nanoparticles for providing wear resistance to the matrix. All the nanocomposites displayed low dielectric constant and dielectric loss, hence can be employed as insulating materials in electrosurgical applications. They also exhibited active inhibition against both Gram-positive and Gram-negative bacteria, which was gradually enhanced with increasing ZnO content. These nanocomposites are suitable as lightweight high-performance materials in the field of medicine and dentistry.

Polypropylene/Polyaniline Nanofiber/Reduced Graphene Oxide Nanocomposite with Enhanced Electrical, Dielectric, and Ferroelectric Properties for a High Energy Density Capacitor

“…[4][5][6][7][8][9][10][11][12]14,16 In particular, the inorganic fillers, including BaTiO 3 , 4−7,15 SrTiO 3 , 16−18 Pb(Zr x Ti 1−x )O 3 −PbTiO 3 , 19 AlTiO 3 , 20,21 Al 2 O 3 , 10,11,22 ZrO 2 , 10,23 MgO, 10,11 and their mixtures, 10,11,19,24 have been extensively used as dielectric capacitors owing to their high dielectric permittivity of several hundreds. Marks et al reported that the BaTiO 3 − and ZrO 2 − Al 2 O 3 nanoparticles can significantly improve the dielectric permittivity and energy density of the PP nanocomposites.…”

Magnetite nanoparticles surface-modified with a zinc(II)-carboxylate Schiff base ligand as a sorbent for solid-phase extraction of organochlorine pesticides from seawater

“…1c) contains the characteristic peaks of the imine base ligand such as C = N, C = C and C = O stretching vibration peak at 1598, 1555 and 1647 cm −1 , respectively. The peak at 450 cm −1 corresponded to Zn-O stretching [29]. The surface morphology and particle size of Fe 3 O 4 @MAA@IBL nanostructure were studied by SEM and TEM images.…”

Effect of polyphenylene sulfide containing amino unit on thermal and mechanical properties of polyphenylene sulfide/glass fiber composites

“…Poly(1,4‐phenylene sulfide) (PPS) is widely applied in food industry, mechanical and chemical engineering, automobile, electronics, aerospace engineering, and so on nowadays as a special kind of semicrystalline engineering thermoplastic, due to its excellent chemical resistance, good thermal property, and low toxicity . However, the pure PPS cannot be used widely in the world because of its brittleness .…”