Infrared Spectroscopy of Bismuth-Containing Composites Based on Porous High-Silica Glass

Гирсова, М. А.; Головина, Г. Ф.; Куриленко, Л. Н.; Анфимова, И. Н.

doi:10.1134/s1087659620020042

Cited by 6 publications

(5 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Silica group was also detected at 640 cm −1 in addition to a silanol group that might be part of the calcium silicate hydrate layer (CSH) at 956 cm −1 . [ 21 22 23 24 ] The carbonate group of calcite appeared at 875 cm −1 and about 1458 cm −1 . [ 25 ] A band at 3,465 cm −1 indicated the presence of Ca(OH) 2 .…”

Section: Resultsmentioning

confidence: 99%

In vitrobioactivity of newly introduced dual-cured resin-modified calcium silicate cement

2022

View full text Add to dashboard Cite

Background: This study was designed to investigate the in vitro bioactivity of a new dual cured calcium silicate cement (TheraCal PT) compared to its light cured (TheraCal LC) and chemically set (Biodentine) counterparts. Materials and Methods: The study is an in vitro original research article. Prepared cements discs were immersed in deionized water. Ca 2 + release was evaluated using inductively coupled plasma-optical emission spectrometry while pH was assessed using a pH meter after 1, 14, and 28 days. Discs for surface characterization were immersed in phosphate-buffered saline (PBS) and were examined using an environmental scanning electron microscope with energy dispersive X-ray (ESEM/EDX), immediately after setting and at 1, 14, and 28 days intervals after that. Attenuated total reflectance (ATR)/Fourier transform infrared (FTIR) and Raman spectroscopy analyses were performed after setting and after 28 days storage in PBS. Statistical analysis was performed using the two-way repeated measure analysis of variance test followed by Bonferroni test for multiple comparisons ( P < 0.05). Results: Biodentine exhibited the highest mean values for Ca 2 + release (792,639,278 ppm) and pH (10.99, 12.7, 11.54) at all time intervals. ESEM/EDX displayed a continuous layer of calcium phosphate formed by Biodentine and TheraCal LC while TheraCal PT developed scarce interrupted precipitates after immersion in PBS. ATR/FTIR and Raman spectroscopy for the formed precipitates confirmed the presence of phosphate and Ca (OH) 2 in Biodentine, TheraCal LC and TheraCal PT. Conclusion: TheraCal PT exhibited limited in vitro bioactivity which may limit its prognosis in clinical applications for vital pulp therapy. TheraCal LC is considered a potential bioactive calcium silicate cement despite its lower Ca 2 + release compared to Biodentine. Highest bioactivity was observed in Biodentine.

show abstract

Section: Resultsmentioning

confidence: 99%

In vitrobioactivity of newly introduced dual-cured resin-modified calcium silicate cement

2022

View full text Add to dashboard Cite

show abstract

“…57 at 2066 cm À1 corresponding to the vibrations of metal carbonyl group, peak at 1628 cm À1 is due to O─H bending and the peak at 521 cm À1 is assigned to the stretching frequency of Bi─O bond of Bi 2 O 3 nanofillers. [60][61][62] The presence of O─H stretching vibrational peak exhibited by A2 nanocomposite, thus, confirms the interaction of nanofiller with silicone polymer via hydrogen bonding at the interface. 63 The peak at 2360 cm À1 exhibited by both the samples is attributed to the presence of atmospheric carbon dioxide.…”

Section: Resultsmentioning

confidence: 82%

“…The pre-irradiated A4 nanocomposite exhibits all the characteristic peaks of silicone polymer at 1586, 1269, 1188, 1100, 1019, 802, 681, and at 539 cm À1 assigned to Bi─O or Bi─O─Si bond vibrations. 62 Similarly, the post-irradiated A4 nanocomposite also exhibits all the characteristic peaks of pre-irradiated A4 polymer but with a shift in peak position towards higher wavenumber. This may be attributed to changes in polymer-nanofiller interface as a result of excitation of bismuth nanofillers and photoelectric effect due to X-ray irradiation.…”

Section: Resultsmentioning

confidence: 94%

“…The FTIR spectrum of pre-irradiated A13 nanocomposite exhibits the characteristic peaks of silicone polymer at 1358, 1263, 1183, 1108, 1020, 804, 669, 608 cm À1 corresponding to the vibrational peaks of silicone polymer and the peak at 540 cm À1 is assigned to Gd─O bond and Bi─O or Bi─O─Si bond vibrational frequency. 61,62 It also exhibits a broad peak between 3662 and 3046 cm À1 corresponding to O─H bond which is attributed to hydrogen bonding between Gd─O and hydroxyl/silanol group of silicone polymer. The FTIR spectrum of post-irradiated A13 nanocomposite exhibits similar behavior as that of pre-irradiated A13 nanocomposite, with a reduction in intensity of vibrational peak between 3679 and 3213 cm À1 corresponding to hydrogen bonding.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Multifiller nanocomposites containing gadolinium oxide and bismuth nanoparticles with enhanced X‐ray attenuation property

Jayakumar

Mani

Saravanan

et al. 2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

We report here the development of multifiller nanocomposite containing gadolinium oxide and bismuth nanofillers with enhanced X-ray attenuation property. The mass attenuation coefficient of the nanocomposite is found to be 5.26 (X-ray attenuation: 95%) and 2.22 cm 2 /g (X-ray attenuation: 71%), respectively, under dental and lung X-ray scan conditions. Fourier transform infrared spectroscopy confirms the interfacial interaction between Gd 2 O 3 nanofillers and the polymer matrix through hydrogen bonding. Atomic force microscopy images of the nanocomposite show a smooth and uniform topography with an average surface roughness of~19 nm. Thermogravimetric analysis confirms the thermal stability of the nanocomposite upto 384 C. The enhanced X-ray attenuation property of the nanocomposite is attributed to the good interfacial bonding, dual k-edge effect of nanofillers and their uniform distribution within the polymeric matrix. Therefore, this nanocomposite is a promising material for diagnostic X-ray shielding, especially as, thyroid collar, gonad shield, aprons, gloves, and so on.

show abstract

“…A decrease in intensity of the absorption bands characteristic of sodium alginate between 2000–450 cm −1 was also observed with increase in Bi 2 O 3 loading. Three new bands were observed in the FTIR spectra at 845, 611, and 543 cm −1 corresponding to BiOBi and BiO bonds respectively and intensity of these bands increased with loading 59,60 . These observations indicate weak hydrogen bonding between sodium alginate matrix and Bi 2 O 3 fillers, which could further affect mechanical properties, chemical and biodegradability of the composites.…”

Section: Resultsmentioning

confidence: 93%

Sodium alginate/bismuth (III) oxide composites for γ‐ray shielding applications

Prabhu

Bubbly

Gudennavar

2020

J of Applied Polymer Sci

View full text Add to dashboard Cite

In the present work, we have explored the efficacy of bismuth (III) oxide (Bi2O3) loaded, calcium ion cross‐linked solution cast sodium alginate composite films for radioprotective applications. Calcium ion cross‐linking increased the water and chemical resistance, which further improved on introduction of Bi2O3 into the composites. The 40 wt% Bi2O3 loaded films showed good heat resistance with the peak degradation temperature reaching as high as 251°C. The Bi2O3 loaded composites showed enhanced tensile strength (TS) and Youngs modulus (YM). Compared to high‐modulus polymers like epoxy, high‐density polyethylene (HDPE) and poly (vinyl chloride) (PVC), these exhibit relatively greater extent of stretching before breaking. The γ‐ray attenuation experiments showed that mass attenuation coefficients of the composites at various γ‐ray energies increased with filler loading. These composites are effective in shielding γ‐rays from radioactive sources like 137Cs, 22Na, 133Ba, and 60Co that are widely employed in several medical and industrial applications. The overall enhancement in thermal, mechanical, and radiation shielding characteristics of the composites may be attributed to the uniform distribution of the fillers in alginate matrix. These nontoxic sodium alginate/Bi2O3 composites can be used as soft and biodegradable radiation shields, which may be processed to wearable forms.

show abstract

Infrared Spectroscopy of Bismuth-Containing Composites Based on Porous High-Silica Glass

Cited by 6 publications

References 20 publications

In vitrobioactivity of newly introduced dual-cured resin-modified calcium silicate cement

In vitrobioactivity of newly introduced dual-cured resin-modified calcium silicate cement

Multifiller nanocomposites containing gadolinium oxide and bismuth nanoparticles with enhanced X‐ray attenuation property

Sodium alginate/bismuth (III) oxide composites for γ‐ray shielding applications

Contact Info

Product

Resources

About