Elaboration of novel polyaniline@Almond shell biocomposite for effective removal of hexavalent chromium ions and Orange G dye from aqueous solutions

The fabrication of biocompatible and antibacterial coatings on metallic implants remains a significant challenge for load‐bearing orthopedic implants. This study focuses on the electrophoretic deposition of chitosan/gelatin/Ag‐Mn doped mesoporous bioactive glass nanoparticles (Ag‐Mn MBGNs) composite on the PEEK/bioactive glass layer (called as multi‐structured coatings), which had been deposited electrophoretically on 316L stainless steel. The EPD parameters for the deposition of the chitosan/gelatin/Ag‐Mn MBGNs coatings were optimized via Taguchi design of experiment approach. Scanning electron microscopy images confirmed that the chitosan/gelatin/Ag‐Mn MBGNS layer was deposited on the PEEK/BG layer. The addition of biologically active metallic ions (Mn and Ag) and molecules (chitosan) showed a strong effect on the growth of bacteria. Moreover, the inclusion of Mn and Ag showed a negligible toxic effect on the bioactivity (the ability of the coating to form a bond with the natural bone) of the coatings. Furthermore, the multi‐structured coatings presented appropriate wettability and surface roughness for orthopedic applications. Overall, this study provides a direct solution to improve the bioactivity, antibacterial activity, and surface properties of deposited chitosan/gelatin coatings on orthopedic implants that are more manufacturable and translational from research to an industrial scale.

Section: Introductionmentioning

confidence: 89%

Chitosan/gelatin‐based bioactive and antibacterial coatings deposited via electrophoretic deposition

Nawaz

Rehman

2020

“…The degradation products of most organic dyes are far more toxic than parent compounds demanding the urgent need for innovative technological solutions 10–14 . Photocatalytic/photoassisted degradation is considered as an acceptable alternative route for the removal of organic dyes and pesticides from water 15,16 and plethora of works are available in this relation 17,18 . Most of the materials reported so far are highly expensive and their fabrication/synthesis require complex procedures combined with time‐consuming steps 16,19,20 .…”

Section: Introductionmentioning

confidence: 99%

Photoassisted degradation of rhodamine B using poly(ε‐caprolactone) based nanocomposites: Mechanistic and kinetic features

Elias

Sarathchandran

Joseph

et al. 2021

The efficiency of poly (ε‐caprolactone)‐cloisite 10A nanocomposite membrane in removing/degrading of an amphoteric dye (rhodamine B) from aqueous samples under visible light is investigated in detail. Nanocomposite membranes were prepared by electrospinning technique using acetone‐chloroform mixture as solvent. The synthesized nanocomposites were used to degrade rhodamine B from aqueous samples under visible light conditions using a 50 W light‐emitting diode lamb. Samples were withdrawn at definite intervals of 30 min and analyzed using UV–vis spectroscopy, LC‐Q‐ToF/MS‐MS, and antibacterial studies. Detailed chemistry of the rhodamine B degradation is reported by interpreting experimental results and using first‐principles density functional theory calculations. Cytotoxicity tests confirm the eco‐friendly nature of end product obtained. Nanocomposite with 9 wt% of cloisite 10A, effectively converts rhodamine B to eco‐friendly products within almost 3 h. To the best of our knowledge, no work has been reported on the use of poly(ε‐caprolactone)‐cloisite 10A nanocomposites for dye removal from water samples.

“…), lignocellulosic shells of almond, apricot, walnut, coconut, hazelnut, have been utilized as the filling material in various types of polymeric composites 1–7 . They have also been used as adsorbents in the form of hybrid composites with conducting polymers for wastewater treatment 8,9 . The widespread utilization of bio‐degradable polymers may contribute to create an eco‐friendly environment 10 .…”

Section: Introductionmentioning

confidence: 99%

Application of various carboxylic acids modified walnut shell waste as natural filler for epoxy‐based composites

Albaker

Kocaman

Martı

et al. 2021

In this study, chemically modified walnut shells (WS) were used as the filling material for synthesis of bio‐based epoxy composites and added to the matrix at varied mass ratios (10%–50%). The shells were initially treated with alkali and then modified with three different organic acids (citric acid [CA], oxalic acid [OA], and formic acid [FA]). The WS were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy (SEM)/energy‐dispersive X‐ray spectroscopy (EDX) and thermo gravimetric analyzer. The SEM and X‐ray diffraction were employed to observe the morphology of the composites. The influences of acid type and WS percentages on the mechanical, thermal and water sorption properties were investigated. The maximum tensile strength (124.8 MPa) was obtained with CA‐treated shells (CA‐WS) and followed by OA‐treated shells (OA‐WS) (117 MPa) and FA‐treated shells (FA‐WS) (96.5 MPa). Acid modification had a positive effect on Young's modulus as that of epoxy resins increased by 5.45%–50.91%. The treatment did not significantly affect hardness. The optimum amount of modified shells in the composites was found to be 20 wt%. Water sorption values changed in the range of 2.78%–3.42% for composites with 20 wt% WS and observed to increase with the filler amount in the composite. However, this trend and the slight decrease in thermal properties are not critical obstacles for the use of modified WS in the manufacture of inexpensive epoxy‐ and bio‐based eco‐friendly products.