High-k Polymer Nanocomposites for Energy Storage Applications

Mahmood, Asad; Akhtar, Naeem; Mahmood, Tahira

doi:10.5772/65944

Cited by 12 publications

(8 citation statements)

References 52 publications

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“…Metal oxides are reported to possess a higher value of ε′ along with low

{normalε}^{″}

value [14]. The obtained result also substantiated that the dispersion of G‐ZnO in the polymeric system was uniform, without any aggregation, and thereby provided tunneling and lowered the dielectric strength of the as‐prepared polymer nanocomposite 48 …”

Section: Resultssupporting

confidence: 57%

“…The obtained result also substantiated that the dispersion of G-ZnO in the polymeric system was uniform, without any aggregation, and thereby provided tunneling and lowered the dielectric strength of the as-prepared polymer nanocomposite. 48 Figure 8B graphically represents the dielectric loss ε 00 , resulting from the failure of polarization process of the dipoles, to go along with the varying electric field oscillations. This relaxation mechanism or relaxation time could be explained as the time required for the molecules to reorient themselves to their original position.…”

Section: Studies On Dielectric Parameters and Conductivitymentioning

confidence: 99%

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Preparation and characterizations of antibacterial and electroactive polymeric composites for wound healing applications

Unnikrishnan,

Joy,

Megha

et al. 2023

Polymer Composites

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Polymer nanocomposites have been utilized for wound healing applications. Compared to the conventional polymer composites, conducting polymer nanocomposites comprising a blend of biocompatible polymers with electroconductive and antibacterial nanofillers such as graphene‐based nanomaterials and metal/metal oxides, have attracted great attention in this arena due to enhanced physical, electrical and biological characteristics. Herein, polyvinyl alcohol (PVA)/chitosan (CS)/graphene oxide/zinc oxide electroconductive and antibacterial composite hydrogel films were fabricated by solution casting technique, for wound healing applications. The physicochemical and conductivity studies were carried out for all the polymer samples. The successful incorporation of the nanofillers and their even distribution into the PVA‐CS matrix was validated by the scanning electron microscopy‐EDAX, x‐ray diffractometer, Fourier‐transform infrared, and Raman analytical results. An enhancement in the surface roughness of the nanofiller incorporated composite film was elucidated by the topographical images obtained from AFM analysis. The composite with higher concentration of nanofillers exhibited a maximum conductivity of 0.35 10−4 Scm−1 compared to the other fabricated composites. A good antibacterial efficacy, minimal hemolytic activity as well as better thrombogenicity were portrayed by the composite films. Additionally, the nanocomposite films exhibited no cytotoxicity and excellent cell attachment and proliferation of RAW 264.7 cells. Therefore, based on the obtained results, it can be concluded that the composite with higher particle concentration, is an ideal candidate for futuristic wound dressing applications with electroconductivity, antimicrobial activity, hemostatic ability, and biocompatibility.Highlights Fabrication of polyvinyl alcohol (PVA)/chitosan (CS)/GO‐ZnO hydrogel films by solvent‐casting A maximum conductivity of 0.35 10−4 S/cm obtained for the composite film Exhibited good antibacterial efficacy and minimal hemolytic activity Better thrombogenicity and cytocompatibility portrayed by the composite An ideal candidate for futuristic wound dressing applications

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“…Metal oxides are reported to possess a higher value of ε′ along with low

{normalε}^{″}

Section: Resultssupporting

confidence: 57%

Section: Studies On Dielectric Parameters and Conductivitymentioning

confidence: 99%

Preparation and characterizations of antibacterial and electroactive polymeric composites for wound healing applications

Unnikrishnan,

Joy,

Megha

et al. 2023

Polymer Composites

View full text Add to dashboard Cite

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“…Undeniably, the developed standards and assessment indicators of language textbooks in research and practice have established general rules that appear to be applicable to assess the digital and paper textbooks, with some of them specific to other subjects and users depending on developers' research interests (Bouzid, 2017;Cai, 2021;Mahmood, 2011). Combining with viewpoints of Liu (2002) and Zhao (2005), Wang (2008) proposed six major categories to be the basic structure for assessment indicators of Chinese textbooks for children of other languages (COL): background, specificity, practicality, scientific-ness, engagingness, and systematic-ness.…”

Section: Literature Reviewmentioning

confidence: 99%

A content analysis for Children’s Chinese Reader and its implications

Cai

Chao

2022

Preprint

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Chinese learning materials for children has yet to be explored. This study revises the assessment form in Chinese Learning Materials Design Prerequisites, developed by Wang in 2008, to evaluate Chinese learning materials for Children, with a focus on a book series entitled Children’s Chinese Reader published by the Overseas Community Affairs Council in Taipei, Taiwan. The purpose of this study is two-fold. The first attempt is to find out the potential merits and the drawbacks that need addressing urgently. The second attempt is to see the potentiality of using the same materials on different groups of children leaners such as children learning Chinese as a second language, instead of the target learners that the book series has set on. The finding from the initial evaluation indicated a low score of 91 in individually evaluated categories except one, which is being systematic. Categories in being specific, being practical, being scientific, and being intriguing all received a low score. The current surmise is that the then Children’s Chinese Reader is a synchronic product of its time that now calls for advancement in latest theoretical research and contemporary teaching principles if materials for children’s learning can play an appropriate role in modern-day teaching.

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“…Conventionally, titanate (TiO2), barium titanate (BaTiO3, BT) barium strontium titanate (BaSrTiO3, BST), lead zirconate titanate (PZT), magnesium oxide (MgO), barium zirconate titanate (BZT) ceramics and metal phenylphosphonates are commonly preferred due to their promising electrical properties [4]. Perovskite type ceramics (general stoichiometry of ABO3) show unique crystalline structures that leads to superior dielectric properties.…”

Section: Introductionmentioning

confidence: 99%