Flexoelectricity and piezoelectric effects in poly (vinyl alcohol)-SrTiO3 nanocomposites

Prokhorov, E.; Luna-Bárcenas, Gabriel; Limón, J. M. Yáñez; Muñoz-Saldaña, J.

doi:10.1016/j.materresbull.2023.112361

“…Основным основанием анализа рентгенограммы стронции титана является подтверждение кубической структуры SrTiO 3 . Уточненное значение периода элементарной ячейки составило а = 3,905 Å и совпадает с литературными данными (Prokhorov et al, 2023). Характерные пики образцов SrTiO 3 появляются при 2θ, 32,4 0 , 40,5 0 , 46,5 0 , 58,5 0 и 68,5 0 и приписываются ((110), ( 111), ( 200), ( 211 На рисунке 3 (а-ж) показаны СЭМ-изображения нановолокон, полученные методом электроспиннинга при напряжении 18 кВ и расстоянии между иглой и электродом 15 см.…”

Section: результаты и обсуждениеunclassified

Comparative Analysis of the Characteristics of Onedimensional Fibers With Different Compositions and Structures

Serik,

Kuspanov,

Idrisov

et al. 2023

Reports

0

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“…Основным основанием анализа рентгенограммы стронции титана является подтверждение кубической структуры SrTiO 3 . Уточненное значение периода элементарной ячейки составило а = 3,905 Å и совпадает с литературными данными (Prokhorov et al, 2023). Характерные пики образцов SrTiO 3 появляются при 2θ, 32,4 0 , 40,5 0 , 46,5 0 , 58,5 0 и 68,5 0 и приписываются ((110), ( 111), ( 200), ( 211 На рисунке 3 (а-ж) показаны СЭМ-изображения нановолокон, полученные методом электроспиннинга при напряжении 18 кВ и расстоянии между иглой и электродом 15 см.…”

Section: результаты и обсуждениеunclassified

Developing Student Research Proficiency in the Context of the Digital Transformation of Physics Education

Sandibayeva,

Akhmetova,

Baiymbetova

2023

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0

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“…Strontium Titanate nanoparticles are perovskites with a high dielectric constant that may exhibit piezoelectricity and flexoelectricity. Recent studies have demonstrated that PVA-SrTiO 3 nanocomposite films can be prepared with a significant flexoelectric response [ 10 ]. The properties of the nanocomposite films have proved to be highly dependent on the nanoparticle concentration, aggregation within the matrix, and the nanoparticle/matrix interface interactions [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

PVA-Based Films with Strontium Titanate Nanoparticles Dedicated to Wound Dressing Application

Kaczmarek-Szczepańska,

Zasada,

Wekwejt

et al. 2024

Polymers

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Bioactive materials may be applied in tissue regeneration, and an example of such materials are wound dressings, which are used to accelerate skin healing, especially after trauma. Here, we proposed a novel dressing enriched by a bioactive component. The aim of our study was to prepare and characterize poly(vinyl alcohol) films modified with strontium titanate nanoparticles. The physicochemical properties of films were studied, such as surface free energy and surface roughness, as well as the mechanical properties of materials. Moreover, different biological studies were carried out, like in vitro hemo- and cyto-compatibility, biocidal activity, and anti-biofilm formation. Also, the degradation of the materials’ utilization possibilities and enzymatic activity in compost were checked. The decrease of surface free energy, increase of roughness, and improvement of mechanical strength were found after the addition of nanoparticles. All developed films were cyto-compatible, and did not induce a hemolytic effect on the human erythrocytes. The PVA films containing the highest concentration of STO (20%) reduced the proliferation of Eschericha coli, Pseudomonas aeruginosa, and Staphylococcus aureus significantly. Also, all films were characterized by surface anti-biofilm activity, as they significantly lowered the bacterial biofilm abundance and its dehydrogenase activity. The films were degraded by the compost microorganism. However, PVA with the addition of 20%STO was more difficult to degrade. Based on our results, for wound dressing application, we suggest using bioactive films based on PVA + 20%STO, as they were characterized by high antibacterial properties, favorable physicochemical characteristics, and good biocompatibility with human cells.

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Flexoelectricity and piezoelectric effects in poly (vinyl alcohol)-SrTiO3 nanocomposites

Cited by 6 publications

References 74 publications

Comparative Analysis of the Characteristics of Onedimensional Fibers With Different Compositions and Structures

Comparative Analysis of the Characteristics of Onedimensional Fibers With Different Compositions and Structures

Developing Student Research Proficiency in the Context of the Digital Transformation of Physics Education

PVA-Based Films with Strontium Titanate Nanoparticles Dedicated to Wound Dressing Application

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