Barrier, rheological, and antimicrobial properties of sustainable nanocomposites based on gellan gum/polyacrylamide/zinc oxide

Rukmanikrishnan, Balasubramanian; Ramalingam, Srinivasan; Lee, Jaewoong

doi:10.1002/pen.25773

Cited by 21 publications

(12 citation statements)

References 53 publications

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“…Regarding rheological properties, it was noticed that all adhesives in our study demonstrated a reduced viscosity at higher angular frequencies (Figure 3). A previous study showed similar findings and reported that ZnO nanoparticles containing composites also displayed shear-thinning behavior [32]. Another similar study echoed our findings and reported that the adhesives containing nanoparticles show reduced viscosity at higher angular frequencies [33].…”

Section: Discussionsupporting

confidence: 91%

Adhesive Bond Integrity of Experimental Zinc Oxide Nanoparticles Incorporated Dentin Adhesive: An SEM, EDX, μTBS, and Rheometric Analysis

et al. 2022

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Objective. Our study is aimed at preparing an experimental adhesive (EA) and assessing the influence of adding 5-10 wt.% concentrations of zinc oxide (ZnO) nanoparticles on the adhesive’s mechanical properties. Methods. Field emission scanning electron microscopy (FESEM) and energy dispersive X-ray (EDX) spectroscopy were employed to investigate the morphology and elemental distribution of the filler nanoparticles. To examine the adhesive properties, microtensile bond strength (μTBS) testing, an investigation of the rheological properties, degree of conversion (DC), and analysis of the interface between the adhesive and dentin were carried out. Results. The SEM micrographs of ZnO nanoparticles demonstrated spherical agglomerates. The EDX plotting confirmed the incidence of Zn and oxygen (O) in the ZnO nanoparticles. The highest μTBS was observed for nonthermocycled (NTC) 5 wt.% ZnO group ( 32.11 ± 3.60 MPa), followed by the NTC-10 wt.% ZnO group ( 30.04 ± 3.24 MPa). Most of the failures observed were adhesive in nature. A gradual reduction in the viscosity was observed at higher angular frequencies, and the addition of 5 and 10 wt.% ZnO to the composition of the EA lowered its viscosity. The 5 wt.% ZnO group demonstrated suitable dentin interaction by showing the formation of resin tags, while for the 10 wt.% ZnO group, compromised resin tag formation was detected. DC was significantly higher in the 0% ZnO (EA) group. Conclusion. The reinforcement of the EA with 5 and 10 wt.% concentrations of ZnO nanoparticles produced an improvement in the adhesive’s μTBS. However, a reduced viscosity was observed for both nanoparticle-reinforced adhesives, and a negotiated dentin interaction was seen for 10 wt.% ZnO adhesive group. Further research exploring the influence of more filler concentrations on diverse adhesive properties is recommended.

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Section: Discussionsupporting

confidence: 91%

Adhesive Bond Integrity of Experimental Zinc Oxide Nanoparticles Incorporated Dentin Adhesive: An SEM, EDX, μTBS, and Rheometric Analysis

et al. 2022

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“…[30] Polymer nanocomposites based on ZnO nanoparticles are extensively studied due to their unique structural, rheological, thermal, electrical, energy harvesting, mechanical, and antimicrobial properties. [31][32][33] Shanshool et al studied the optical properties of ZnO nanoparticles reinforced polymers such as poly(methyl methacrylate), poly(vinylidene fluoride), polyvinyl alcohol and polystyrene. [34] Sen et al reported the methane detection capability of PANI/ZnO nanocomposites at room temperature.…”

Section: Introductionmentioning

confidence: 99%

High performance optical and electrical properties of zinc oxide reinforced poly(diphenylamine) nanocomposites for optoelectronic applications

Furhan

Ramesan

2022

Polymer Engineering & Sci

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Polymer nanocomposites with good optical, crystalline, morphological, thermal, dielectric, and electrical properties were synthesized using poly(diphenylamine) (PDPA) and zinc oxide (ZnO) nanoparticles. The redshift in the UV absorption edges of composites indicates that ZnO nanoparticles have been successfully incorporated into the PDPA matrix. The lowest optical bandgap energy and maximum refractive indices were observed in 7 wt% loadings. The narrowing of the avearge chain spacing detected by X-ray diffraction (XRD) proved that ZnO had an impact on the structure of PDPA. Scanning electron microscopy (SEM) images show homogeneous dispersion of spherically shaped ZnO nanoparticles at lower filler loadings. The glass transition temperature of the nanocomposites was greatly enhanced with the addition of nanoparticles analyzed by differential scanning calorimetry. The electrical and dielectric properties improved with temperature and nanoparticle loadings up to 7 wt%. The analysis of impedance spectra and the decreasing radius of semi-circular arcs in the Nyquist plot manifests the existence of temperature-dependent conductivity and relaxation phenomenon. The experimental values of DC conductivities were correlated with different theoretical conductivity models and the McCullough model was found to be the most promising one to explain the increased DC conductivity of the PDPA/ZnO nanocomposites.

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“…As a control, the strength of C=O bond in the grafted-PET molecules decreased at 1710 cm À1 Apart from that, other characteristic peaks of PET fibers were remained similar. It can be clearly seen that new absorption bands amide I and amide II appeared after grafting at 1650 cm À1 and 1580 cm À1 , 19,20 which is characteristic for C=O stretching vibration and N-H in-plane bending vibration of amide groups from PAM. 17,21,22 It illustrate that acrylamide was successfully grafted on the PET fibers surface by UV-irradiation.…”

Section: Ftir Resultsmentioning

confidence: 98%

Preparation and properties of polyester fibers with polyacrylamide hydrogel grafted by UV‐irradiation

Zhang,

Qiang,

et al. 2023

Polymer Engineering & Sci

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It is widely recognized that polyester (PET) fibers with swelling properties are necessary for advanced applications of PET fibers in waterproof fabrics. This study presented the UV‐initiated methods to graft polyacrylamide (PAM) hydrogel on the surface of PET fibers. In the one‐step method, PET fibers are impregnated with a mixed solution of the photoinitiator benzophenone (BP) and the monomer acrylalkylamine (AM). Then, the PET fiber was directly exposed to UV light. In the two‐step method, PET fibers were first impregnated with a photoinitiator solution to generate BP radicals. Then, the fibers impregnated with a monomer solution before being grafted by UV light. Both two methods ultimately achieve PAM gelation‐modified PET fibers. The chemical composition and surface structure were detected by Fourier transform infrared spectroscopy and scanning electron microscope. The findings demonstrate that the PAM hydrogel was successfully grafted on the PET fibers through one‐step method or a two‐step method. In addition, the properties of the grafted PET fibers were evaluated by grafting yield, contact angle, and swelling test. The study indicated that the modified PET fibers via a two‐step method exhibited a superior grafting yield up to 29.3% (PET‐2n) and 54% (PET‐2) compared to the one‐step technique (PET‐1). It was shown that the grafting efficacy of PET fibers modified by two‐step method is better than one‐step method. The static contact angles of PET fibers by UV‐Induced were all reduced. For instance, the contact angles of PET‐2n were decreased from 115° to 62.9°; and the two‐step modified PET fiber after acetone cleaning (PET‐2) decreased from 115° to 60°. It was suggested that the hydrophilicity of the modified PET fibers significantly increased. In addition, the research shows that the gelation‐modified fibers were all possessed swelling properties.

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Barrier, rheological, and antimicrobial properties of sustainable nanocomposites based on gellan gum/polyacrylamide/zinc oxide

Cited by 21 publications

References 53 publications

Adhesive Bond Integrity of Experimental Zinc Oxide Nanoparticles Incorporated Dentin Adhesive: An SEM, EDX, μTBS, and Rheometric Analysis

Adhesive Bond Integrity of Experimental Zinc Oxide Nanoparticles Incorporated Dentin Adhesive: An SEM, EDX, μTBS, and Rheometric Analysis

High performance optical and electrical properties of zinc oxide reinforced poly(diphenylamine) nanocomposites for optoelectronic applications

Preparation and properties of polyester fibers with polyacrylamide hydrogel grafted by UV‐irradiation

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