Development of bioactive sodium alginate/sulfonated polyether ether ketone/hydroxyapatite nanocomposites: Synthesis and in-vitro studies

2021 ◽  
pp. 118236
Author(s):  
Esmaeil Salimi
Keyword(s):  
Sodium Alginate ◽  
In Vitro Studies ◽  
Polyether Ether Ketone ◽  
Sulfonated Polyether Ether Ketone ◽  
Ether Ketone

scholarly journals Interfacial Fracture Toughness Comparison of Three Indirect Resin Composites to Dentin and Polyether Ether Ketone Polymer

2020 ◽  
Vol 14 (03) ◽  
pp. 456-461
Author(s):  
Rayhaneh Khalesi ◽  
Mahdi Abbasi ◽  
Zahra Shahidi ◽  
Masoumeh Hasani Tabatabaei ◽  
Zohreh Moradi
Keyword(s):  
Fracture Toughness ◽  
Bond Strength ◽  
Testing Machine ◽  
Composite Resins ◽  
High Wear Resistance ◽  
Luting Cements ◽  
Anterior Teeth ◽  
Polyether Ether Ketone ◽  
Ether Ketone

Abstract Objectives Advances in laboratory composites and their high wear resistance and fracture toughness have resulted in their growing popularity and increasing use for dental restorations. This study sought to assess the fracture toughness of three indirect composites bonded to dental substrate and polyether ether ketone (PEEK) polymer. Materials and Methods This in vitro study was conducted on two groups of dental and polymer substrates. Each substrate was bonded to three indirect composite resins. Sixty blocks (3 × 3 × 12 mm) were made of sound bovine anterior teeth and PEEK polymer. Sixty blocks (3 × 3 × 12 mm) were fabricated of CRIOS (Coltene, Germany), high impact polymer composite (HIPC; Bredent, Germany), and GRADIA (Indirect; GC, Japan) composite resins. Composites were bonded to dentin using Panavia F 2.0 (Kuraray, Japan). For bonding to PEEK, Combo.lign (Bredent) and Visio.Link (Bredent) luting cements were used. In all samples, a single-edge notch was created by a no. 11 surgical blade at the interface. The samples were subjected to 3,500 thermal cycles, and their fracture toughness was measured in a universal testing machine (Zwick/Roell, Germany) by application of four-point flexural load. Statistical Analysis Data were analyzed using one-way analysis of variance, Kruskal–Wallis. Results The fracture toughness of CRIOS–PEEK interface was significantly higher than HIPC–PEEK. The fracture toughness of GRADIA–PEEK was not significantly different from that of HIPC and CRIOS. The fracture toughness of GRADIA–dentin was significantly higher than HIPC–dentin. Conclusion Considering the limitations of this study, GRADIA has the highest bond strength to dentin, while CRIOS shows the highest bond strength to PEEK.

scholarly journals Adhesion Behaviour of Primary Human Osteoblasts and Fibroblasts on Polyether Ether Ketone Compared with Titanium under In Vitro Lipopolysaccharide Incubation

Materials ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 2739 ◽  
Author(s):  
Korbinian Benz ◽  
Andreas Schöbel ◽  
Marisa Dietz ◽  
Peter Maurer ◽  
Jochen Jackowski
Keyword(s):  
Gene Expression ◽  
Protein Level ◽  
Binding Protein ◽  
Sem Images ◽  
Human Osteoblasts ◽  
Polyether Ether Ketone ◽  
Primary Human Osteoblasts ◽  
Titanium Surfaces ◽  
Ether Ketone

The aim of this in vitro pilot study was to analyse the adhesion behaviour of human osteoblasts and fibroblasts on polyether ether ketone (PEEK) when compared with titanium surfaces in an inflammatory environment under lipopolysaccharide (LPS) incubation. Scanning electron microscopy (SEM) images of primary human osteoblasts/fibroblasts on titanium/PEEK samples were created. The gene expression of the LPS-binding protein (LBP) and the LPS receptor (toll-like receptor 4; TLR4) was measured by real-time polymerase chain reaction (PCR). Immunocytochemistry was used to obtain evidence for the distribution of LBP/TLR4 at the protein level of the extra-cellular-matrix-binding protein vinculin and the actin cytoskeleton. SEM images revealed that the osteoblasts and fibroblasts on the PEEK surfaces had adhesion characteristics comparable to those of titanium. The osteoblasts contracted under LPS incubation and a significantly increased LBP gene expression were detected. This was discernible at the protein level on all the materials. Whereas no increase of TLR4 was detected with regard to mRNA concentrations, a considerable increase in the antibody reaction was detected on all the materials. As is the case with titanium, the colonisation of human osteoblasts and fibroblasts on PEEK samples is possible under pro-inflammatory environmental conditions and the cellular inflammation behaviour towards PEEK is lower than that of titanium.

Sulfonated polyether ether ketone/strontium zirconite@TiO2 nanocomposite membranes for direct methanol fuel cells

2017 ◽  
Vol 5 (38) ◽  
pp. 20497-20504 ◽  
Author(s):  
G. Gnana kumar ◽  
Arumugam Manthiram
Keyword(s):  
Fuel Cells ◽  
Power Density ◽  
Direct Methanol Fuel Cells ◽  
Inorganic Filler ◽  
Nanocomposite Membranes ◽  
Polyether Ether Ketone ◽  
Sulfonated Polyether Ether Ketone ◽  
Direct Methanol ◽  
Ether Ketone ◽  
Methanol Fuel Cells

The use of SrZrO3@TiO2 nanocuboids as an inorganic filler in SPEEK membranes enhances their performance in DMFCs with a power density higher than that achieved with a Nafion 117 membrane.

scholarly journals Proton conducting electrospun sulfonated polyether ether ketone graphene oxide composite membranes

RSC Advances ◽  
2017 ◽  
Vol 7 (84) ◽  
pp. 53481-53491 ◽  
Author(s):  
Jose Luis Reyes-Rodriguez ◽  
Jorge Escorihuela ◽  
Abel García-Bernabé ◽  
Enrique Giménez ◽  
Omar Solorza-Feria ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Composite Membranes ◽  
Proton Conducting ◽  
Oxide Composite ◽  
Polyether Ether Ketone ◽  
Sulfonated Polyether Ether Ketone ◽  
Ether Ketone ◽  
Sulfonated Poly

A series of novel composite membranes, based on sulfonated poly(ether ketone) (SPEEK) with a graphene oxide (GO) layer, were prepared.

PW9V3/rGO/SPEEK hybrid material: an excellent proton conductor

RSC Advances ◽  
2016 ◽  
Vol 6 (88) ◽  
pp. 84689-84693 ◽  
Author(s):  
Huaxue Cai ◽  
Xuefei Wu ◽  
Qingyin Wu ◽  
Fahe Cao ◽  
Wenfu Yan
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Hybrid Material ◽  
Proton Conductor ◽  
Proton Conduction ◽  
Polyether Ether Ketone ◽  
Reduced Graphene ◽  
Sulfonated Polyether Ether Ketone ◽  
Ether Ketone

Reduced graphene oxide (rGO) and sulfonated polyether ether ketone (SPEEK) were introduced into a tungstovanadophosphoric acid (H6PW9V3O40, abbreviated as PW9V3) to prepare a novel PW9V3/rGO/SPEEK hybrid proton conduction material.

Proton Conducting Electrolyte Membranes based on Tungsten Oxide and Sulfonated Polyether Ether Ketone Hybrid Composites

2005 ◽  
Vol 885 ◽  
Author(s):  
Barbara Mecheri ◽  
Alessandra D'Epifanio ◽  
Maria Luisa Di Vona ◽  
Enrico Traversa ◽  
Silvia Licoccia ◽  
...  
Keyword(s):  
Tungsten Oxide ◽  
Proton Conductivity ◽  
Electrochemical Impedance ◽  
Hybrid Composites ◽  
Composite Membranes ◽  
Proton Exchange ◽  
The Body ◽  
Polyether Ether Ketone ◽  
Sulfonated Polyether Ether Ketone ◽  
Ether Ketone

ABSTRACTComposite membranes, prepared by mixing sulfonated polyether ether ketone (SPEEK) and WO3·2H2O in dimethylacetamide, were characterized by Thermogravimetry, Electrochemical Impedance Spectroscopy and Water Uptake measurements to evaluate their possible performance as proton exchange membranes (PEM). The body of results indicated the existence of a coordinative interaction between the water molecules of tungsten oxide and the sulfonic acid (-SO3H) groups of SPEEK. Moreover, EIS data demonstrated that the proton conductivity of the composite membranes is higher than both that of pure SPEEK and pure tungsten oxide, suggesting the presence of ion-rich regions where the proton transfer is favored. The SO3H - H2O interaction not only lead to enhancement of the proton conductivity of the membranes but also to improvement of their heat resistance as well as to decrease their water solubility.

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