Nanotexturing of PC/n-HA nanocomposites by innovative and advanced spray system

Abstract

Nanoscale texturing of a nano-hydroxyapatite (n-HA) filler on a polycarbonate (PC) matrix is ameliorated by advanced engineered spray techniques viz. spray gun and centrifuged spray drying, concerned with modifying topographical properties for biomedical grade screw/plate coating application. Mathematical evaluation of the factors affecting the texture of the thin film PC/n-HA nanocomposite has been modelled for the centrifuged spray dryer concerning homogeneity and symmetric dispersion of n-HA pitching on the PC medium. FTIR illustrates the functional group vibration peaks of 1093 cm À1 and 603 cm À1 of PC/n-HA nanocomposites due to the presence of PO 4 3À . XRD infers the average crystal size of n-HA #20 nm in the PC/n-HA nanocomposite, which possesses consistency in the FESEM micrograph, confirming the various dispersion comparisons between spray gun film and centrifuged spray dried film. Topographical analysis of PC/n-HA film acquired by the two modes of spraying exemplifies surface roughness of 81.4 nm by the spray gun and 132 nm by the centrifuged spray dryer technique, with increasing spikes affirming the uniform scaffold structure of the n-HA embedment over the PC medium, thus, providing the hydrophobic trait needed for corrosion resistant application. Contact angle analysis shows the wettability and adhesive property of the PC/n-HA nanocomposite and delivers a 131.7 contact angle for innovative centrifuged spray dryer technique. Hence, the modelled parameters emphasize the applicability of the innovative designed centrifuged spray dryer technique for biomedical coating applications.Fig. 6 Topographical analysis of PC/n-HA (a) spray gun dried film. (b) Centrifuged spray dried film. (c) Cross-sectional view of n-HA filler over PC matrix.This journal is

Polycarbonate and activated charcoal-engineered electrospun nanofibers for selective recovery of oil/solvent from oily wastewater

“…Peak at 1223 cm −1 corresponds to asymmetric O-C-O carbonate stretching, while adjacent peaks at 1187 cm −1 , and 1156 cm −1 correspond to stretching of C-O present in polycarbonate structure. The last peak at 824 cm −1 is attributed to the para-substituted phenol rings present in the back bone of the PC polymer structure [17][18][19][20][21][22]35].…”

“…The modification via surface chemistry requires regulation of surface tension between oils (30 mN/m), and organic solvents (18.4 mN/m), and water (72.8 mN/m), thereby allowing only oil/solvent absorption but avoiding water wetting [2,10,12,16]. In present study, the authors have utilized engineering polycarbonate (PC) polymer for oil recovery, as it is mechanically strong (izod impact strength = 600-850 J/m), thermal stability (up to 350 °C), ability to facilitate solution formation, and maintaining its structural rigidity up to its high glass transition temperature (140 °C) [17][18][19][20][21][22]. The activated charcoal was utilized in conjunction with PC polymer, since it exhibits functionalized surface encompassing functional groups like C=O, -CO 3 , O-H, and C-O which facilitates bonding with polymer matrix, and is readily available in commercial market at low cost [23,24].…”

Functionalized Aramid Fibers and Composites for Protective Applications: A Review

“…Aramid fiber reinforced composites are primarily used in high end engineering applications such as protective composites for ballistics, defense, aerospace, automobiles, where it requires precision fabricated composite laminates having intact fiber matrix bonding, dimension specified designs, and optimum quantity of resins. ,,,− Apart from aramid fiber reinforced composites, researchers have explored various processes and techniques for the fabrication of composites in different engineering applications. − However, for mitigating the critical requirements of ballistics, defense, and aerospace applications, techniques such as resin film infusion and resin transfer molding have been necessarily used by the industries during the fabrication of such engineered composites.…”

Shock Wave-Assisted Exfoliation of 2D-Material-Based Polymer Nanocomposites: A Breakthrough in Nanotechnology

“…High-performance multifaceted and structural nanocomposites − are attained by dispersing lower fractions of nanosized fillers within the matrix phase. , Polymeric nanocomposites are explicated as polymer matrix composites incorporating nanofillers with at least one of the dimensions spanning within the extent of 100 nm. As opposed to the customary polymer composites with higher micrometer-sized filler loadings, polymer nanocomposites are eventuated at very low filler loadings (<5 volume %) .…”