Fabrication, spectral characterization, XRD and SEM studies on some organic acids doped polyaniline thin films on glass substrate

Devi, Meenakshi; Saranya, A.; Jeyaprakash, P.; Dharmaraja, Jeyaprakash; Prithivikumaran, N.; Jeyakumaran, N.

doi:10.1016/j.jksus.2018.02.008

Cited by 26 publications

(9 citation statements)

References 19 publications

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“…The PVC (blank) surface had noticeable damage compared to the damage seen in the PVC films containing bases 1 – 5 . The cross-linking and evolution of hydrogen chloride and other volatile products leads to the formation of an ice-rock-like structure [55,56,57]. Incidentally, the SEM image for the irradiated PVC/ 1 film showed the least surface damage.…”

Section: Resultsmentioning

confidence: 99%

The Morphology and Performance of Poly(Vinyl Chloride) Containing Melamine Schiff Bases against Ultraviolet Light

et al. 2019

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Five Schiff bases derived from melamine have been used as efficient additives to reduce the process of photodegradation of poly(vinyl chloride) films. The performance of Schiff bases has been investigated using various techniques. Poly(vinyl chloride) films containing Schiff bases were irradiated with ultraviolet light and any changes in their infrared spectra, weight, and the viscosity of their average molecular weight were investigated. In addition, the surface morphology of the films was inspected using a light microscope, atomic force microscopy, and a scanning electron micrograph. The additives enhanced the films resistance against irradiation and the polymeric surface was much smoother in the presence of the Schiff bases compared with the blank film. Schiff bases containing an ortho-hydroxyl group on the aryl rings showed the greatest photostabilization effect, which may possibly have been due to the direct absorption of ultraviolet light. This phenomenon seems to involve the transfer of a proton as well as several intersystem crossing processes.

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Section: Resultsmentioning

confidence: 99%

The Morphology and Performance of Poly(Vinyl Chloride) Containing Melamine Schiff Bases against Ultraviolet Light

et al. 2019

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“…Meanwhile, the FESEM image of the surface of an irradiated PVC film, blended with a trimethoprim-Sn complex, showed rod-like particles ( Figure 10 ) [ 93 ]. It is believed that the crosslinking and elimination of volatiles and hydrogen chloride at a slow rate are the reasons for the formation of the particles that have such shapes [ 113 , 114 ].…”

Section: Morphological Study Of the Surface Of Irradiated Polymers In The Presence Of Additivesmentioning

confidence: 99%

Modifications of Polymers through the Addition of Ultraviolet Absorbers to Reduce the Aging Effect of Accelerated and Natural Irradiation

et al. 2021

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The photooxidative degradation process of plastics caused by ultraviolet irradiation leads to bond breaking, crosslinking, the elimination of volatiles, formation of free radicals, and decreases in weight and molecular weight. Photodegradation deteriorates both the mechanical and physical properties of plastics and affects their predicted life use, in particular for applications in harsh environments. Plastics have many benefits, while on the other hand, they have numerous disadvantages, such as photodegradation and photooxidation in harsh environments and the release of toxic substances due to the leaching of some components, which have a negative effect on living organisms. Therefore, attention is paid to the design and use of safe, plastic, ultraviolet stabilizers that do not pose a danger to the environment if released. Plastic ultraviolet photostabilizers act as efficient light screeners (absorbers or pigments), excited-state deactivators (quenchers), hydroperoxide decomposers, and radical scavengers. Ultraviolet absorbers are cheap to produce, can be used in low concentrations, mix well with polymers to produce a homogenous matrix, and do not alter the color of polymers. Recently, polyphosphates, Schiff bases, and organometallic complexes were synthesized and used as potential ultraviolet absorbers for polymeric materials. They reduced the damage caused by accelerated and natural ultraviolet aging, which was confirmed by inspecting the surface morphology of irradiated polymeric films. For example, atomic force microscopy revealed that the roughness factor of polymers’ irradiated surfaces was improved significantly in the presence of ultraviolet absorbers. In addition, the investigation of the surface of irradiated polymers using scanning electron microscopy showed a high degree of homogeneity and the appearance of pores that were different in size and shape. The current work surveys for the first time the use of newly synthesized, ultraviolet absorbers as additives to enhance the photostability of polymeric materials and, in particular, polyvinyl chloride and polystyrene, based mainly on our own recent work in the field.

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“…The polymer blend exhibits three peaks at 2θ = 16.6°, 18.9°, and 24.4°. 32 The peaks of aloe vera also appeared at 2θ = 26° and 30°. 33 These peak values indicate the incorporation of aloe vera onto the polymer.…”

Section: Resultsmentioning

confidence: 95%

Anticancer potential of poly(2-aminobenzoic acid)-blend-Aloe vera against the human breast cancer cell line MDA-MB-231

Sebastian¹,

Mary

2022

Journal of Bioactive and Compatible Polymers

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Breast cancer in women is amongst the most significant concerns from time immemorial in the field of oncology. This study proposes an anticancerous polymeric material based on an electroactive substituted polyaniline blend, poly(2-aminobenzoic acid)-blend-Aloe vera (PABA/AV) synthesized by the emulsion polymerization method. The structural, thermal, and morphological characteristics determined using FT-IR and UV-Visible Spectroscopy, XRD, TGA, DTA, and SEM-EDX validated the thermally stable, semi-crystalline, emeraldine salt structure. The material is semi-conducting, and the electrical conductivity measured is 1.86 × 10−3 S/cm. It shows bactericidal efficacy against Enterococcus faecalis at a minimum inhibitory and minimum bactericidal concentration of 50 μg/mL. The radical cations in the emeraldine polymer chain reduce the 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical and exhibit a significant % of DPPH scavenging (89.85%) at 20 μL. The polymer blend is active against the human breast cancer cell line MDA-MB-231 and causes 78.65% cytotoxicity at a concentration of 125 μg/mL. The synergistic effect of the ancient healing Aloe vera plant and the electroactive biocompatible poly(2-aminobenzoic acid) certainly opens up new developments in the field of cancer therapy.

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Fabrication, spectral characterization, XRD and SEM studies on some organic acids doped polyaniline thin films on glass substrate

Cited by 26 publications

References 19 publications

The Morphology and Performance of Poly(Vinyl Chloride) Containing Melamine Schiff Bases against Ultraviolet Light

The Morphology and Performance of Poly(Vinyl Chloride) Containing Melamine Schiff Bases against Ultraviolet Light

Modifications of Polymers through the Addition of Ultraviolet Absorbers to Reduce the Aging Effect of Accelerated and Natural Irradiation

Anticancer potential of poly(2-aminobenzoic acid)-blend-Aloe vera against the human breast cancer cell line MDA-MB-231

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