Preparation, characterization, and in vitro bioactivity study of glutaraldehyde crosslinked chitosan/poly(vinyl alcohol)/ascorbic acid-MWCNTs bionanocomposites

Mallakpour, Shadpour; Rashidimoghadam, Shima

doi:10.1016/j.ijbiomac.2019.12.073

Cited by 54 publications

(28 citation statements)

References 50 publications

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“…The Ca/P ratio obtained is close to the ideal stoichiometric value of 1.667 80 and within the range of 1.2–2.2 indicates the amorphous calcium phosphate formation 81 . Similar Ca/P ratio value of 1.8 for the formation of hydroxyapatite was reported by Mallakpour and Rashidimoghadam 82 and Farah et al 83 Figure 12(a) depicts the FTIR spectra of the nanocomposite (C10) after submersion in SBF for different periods (3, 5, 10, and 15 days). The formation of crystalline phosphate was verified by a strong P‐O vibrational bond at 609 cm −1 84,85 .…”

Section: Resultssupporting

confidence: 87%

Fabrication and properties of polyhydroxybutyrate/kaolin nanocomposites and evaluation of their biocompatibility for biomedical applications

Ankush

Pugazhenthi

Vasanth

2021

J of Applied Polymer Sci

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The polyhydroxybutyrate biopolymer nanocomposites (C1–C10) were fabricated by solvent casting method with different loading of kaolin and polyethylene glycol. Scanning electron microscopy showed that the microstructure of the composites varied with different kaolin loading. X‐ray diffraction and Fourier transform infrared spectroscopy analysis confirm the presence of kaolin in the polymer matrix due to the intercalation and formation of hydrogen bond. The contact angle of the nanocomposites decreased with increasing kaolin loading indicating an improvement in wettability of the nanocomposites. Thermogravimetric and differential scanning calorimetry analysis showed that the Tmax and Tm of the nanocomposites increased with increasing kaolin loading. The mechanical property of the nanocomposite fabricated with 10 wt% kaolin (C10) was found to have identical mechanical property with natural bone that was selected as an optimum nanocomposite. The nanocomposite showed prolonged blood clotting time exhibiting anticoagulant nature of the nanocomposite. Moreover, low protein adsorption (168 ± 8 μg/cm2), suppressed platelet adhesion (75 ± 2 × 109 platelets/cm2) and less complement activation (118 ± 5 mg/dl for C3 and 658 ± 5 mg/dl for C4) showed the improvement in surface properties of the nanocomposite. In vitro bioactivity studies revealed the formation of hydroxyapatite layer on the surface of the nanocomposites. Eventually, the nanocomposites (C10) showed no cytotoxic effect on MG‐63 cells as tested through MTT assay and it is biologically safe.

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Section: Resultssupporting

confidence: 87%

Fabrication and properties of polyhydroxybutyrate/kaolin nanocomposites and evaluation of their biocompatibility for biomedical applications

Ankush

Pugazhenthi

Vasanth

2021

J of Applied Polymer Sci

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“…The peak at 1650 cm −1 is attributed to the stretching vibration of -OH groups that are sensitive to intermolecular interaction [ 39 ] or C-H bending vibration in PVA [ 40 ]. In addition, the peak at 1707 cm −1 denotes the stretching vibration of carbonyl (C=O) groups from the existence of acetate groups [ 41 ]. The characteristics vibration at 2860 and 2928 cm −1 attributed to the asymmetric and symmetric stretching vibration of C-H from alkyl groups [ 25 ].…”

Section: Resultsmentioning

confidence: 99%

Swelling-Resistant, Crosslinked Polyvinyl Alcohol Membranes with High ZIF-8 Nanofiller Loadings as Effective Solid Electrolytes for Alkaline Fuel Cells

Hsu

Kumar

et al. 2022

Nanomaterials

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The present work investigates the direct mixing of aqueous zeolitic imidazolate framework-8 (ZIF-8) suspension into a polyvinyl alcohol (PVA) and crosslinked with glutaraldehyde (GA) to form swelling-resistant, mechanically robust and conductivity retentive composite membranes. This drying-free nanofiller incorporation method enhances the homogeneous ZIF-8 distributions in the PVA/ZIF-8/GA composites to overcome the nanofiller aggregation problem in the mixed matrix membranes. Various ZIF-8 concentrations (25.4, 40.5 and 45.4 wt.%) are used to study the suitability of the resulting GA-crosslinked composites for direct alkaline methanol fuel cell (DAMFC). Surface morphological analysis confirmed homogeneous ZIF-8 particle distribution in the GA-crosslinked composites with a defect- and crack-free structure. The increased ionic conductivity (21% higher than the ZIF-free base material) and suppressed alcohol permeability (94% lower from the base material) of PVA/40.5%ZIF-8/GA resulted in the highest selectivity among the prepared composites. In addition, the GA-crosslinked composites’ selectivity increased to 1.5–2 times that of those without crosslink. Moreover, the ZIF-8 nanofillers improved the mechanical strength and alkaline stability of the composites. This was due to the negligible volume swelling ratio (<1.4%) of high (>40%) ZIF-8-loaded composites. After 168 h of alkaline treatment, the PVA/40.5%ZIF-8/GA composite had almost negligible ionic conductivity loss (0.19%) compared with the initial material. The maximum power density (Pmax) of PVA/40.5%ZIF-8/GA composite was 190.5 mW cm−2 at 60 °C, an increase of 181% from the PVA/GA membrane. Moreover, the Pmax of PVA/40.5%ZIF-8/GA was 10% higher than that without GA crosslinking. These swelling-resistant and stable solid electrolytes are promising in alkaline fuel cell applications.

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“…At the second stage, 140–250°C weight loss occurs due to degradation reaction and formation of volatile matter. [ 50 ] The third region was most important for maximum weight loss due to the decomposition of cellulose, hemicellulose, and lignin content in the prepared film samples. The weight loss was observed at 300–400°Cwith 68% of decomposition.…”

Section: Resultsmentioning

confidence: 99%

Influence of silver nanoparticles on mechanical, thermal and antibacterial properties of poly (vinyl alcohol)/rice hull powder hybrid biocomposite films

Babu¹,

Saravanakumar²,

Balaji

2022

Polymer Composites

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Earth produces 2.12 billion tons of total wastes annually and nearly 2 million tons of petroleum-based synthetic polymers each day. The majority of synthetic polymers were obtained by packaging applications. Biodegradable films(biofilms) can be a good alternative for pollution-creating synthetic polymers.Rice hull powder (RHP) as reinforcing fillers, polyvinyl alcohol (PVA) as matrix along with silver nanoparticles (AgNPs) were used to prepare the biofilms. By using the solution casting method, five samples of PVA/RHP (1-5 mM) AgNPs biofilms were fabricated and characterized using Fourier transform infrared (FT-IR), X-Ray Diffraction Analysis (XRD), field emission scanning electron microscope (FESEM), Thermogravimetric Analysis (TGA) and differential scanning calorimetry beyond testing for their mechanical and antibacterial activities. The small spherical shape elements in the FESEM images clarify the presence of AgNPs. The intensities of observed peaks in the FT-IR spectrum keep decreasing with the inclusion of AgNPs. The X-ray diffractogram confirms the strong peaks at 2θ = 38.2 , 49.1 , 60.8 , & 78.3 due to the presence of the AgNPs. The tensile strength and tensile modulus reached a maximum value of 35.5 and 871 MPa respectively. The presence of heat-stable metallic silver made the biofilms thermally stable up to 371 C and also improved the antibacterial activity exhibited by a better inhibition zone. The improved results clarified that biofilms can be suggested for packaging applications.

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Preparation, characterization, and in vitro bioactivity study of glutaraldehyde crosslinked chitosan/poly(vinyl alcohol)/ascorbic acid-MWCNTs bionanocomposites

Cited by 54 publications

References 50 publications

Fabrication and properties of polyhydroxybutyrate/kaolin nanocomposites and evaluation of their biocompatibility for biomedical applications

Fabrication and properties of polyhydroxybutyrate/kaolin nanocomposites and evaluation of their biocompatibility for biomedical applications

Swelling-Resistant, Crosslinked Polyvinyl Alcohol Membranes with High ZIF-8 Nanofiller Loadings as Effective Solid Electrolytes for Alkaline Fuel Cells

Influence of silver nanoparticles on mechanical, thermal and antibacterial properties of poly (vinyl alcohol)/rice hull powder hybrid biocomposite films

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