MgO whiskers reinforced poly(vinylidene fluoride) scaffolds

RSC Advances ◽  
2016 ◽  
Vol 6 (110) ◽  
pp. 108196-108202 ◽  
Author(s):  
Wei Huang ◽  
Ping Wu ◽  
Pei Feng ◽  
Youwen Yang ◽  
Wang Guo ◽  
...  
Keyword(s):  
Vinylidene Fluoride ◽  
Selective Laser Sintering ◽  
Biological Properties ◽  
Laser Sintering ◽  
Poly Vinylidene Fluoride

In this study, poly(vinylidene fluoride) (PVDF) scaffolds with MgO whiskers were prepared through selective laser sintering, and their properties were studied in terms of mechanical and biological properties.

scholarly journals Microstructure, Mechanical, and Biological Properties of Porous Poly(vinylidene fluoride) Scaffolds Fabricated by Selective Laser Sintering

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Wei Huang ◽  
Pei Feng ◽  
Chengde Gao ◽  
Xiong Shuai ◽  
Tao Xiao ◽  
...  
Keyword(s):  
Energy Density ◽  
Vinylidene Fluoride ◽  
Laser Energy ◽  
Selective Laser Sintering ◽  
Biological Properties ◽  
Laser Sintering ◽  
Light Yellow ◽  
Mg63 Cells ◽  
Poly Vinylidene Fluoride ◽  
Porous Poly

Porous poly(vinylidene fluoride) (PVDF) scaffolds were prepared by selective laser sintering. The effects of laser energy density, ranging from 0.66 to 2.16 J/mm2, on microstructure and mechanical properties were investigated. At low energy density levels, PVDF particles could fuse well and the structure becomes dense with the increase of the energy density. Smoke and defects (such as holes) were observed when the energy density increased above 1.56 J/mm2which indicated decomposition of the PVDF powder. The scaffolds appeared to be light yellow and there was a reduction in tensile strength. The fabricated scaffolds were immersed into simulated body fluid for different time to evaluate biostability. In addition, MG63 cells were seeded and cultured for different days on the scaffolds. The testing results showed that the cells grew and spread well, indicating that PVDF scaffolds had good biocompatibility.

Evaluation of poly(vinylidene fluoride)/carbon black composites, manufactured by selective laser sintering

2021 ◽  
Author(s):  
Joffre Luis Brito Guaricela ◽  
Carlos Henrique Ahrens ◽  
Guilherme Mariz Oliveira Barra ◽  
Claudia Merlini
Keyword(s):  
Carbon Black ◽  
Vinylidene Fluoride ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Poly Vinylidene Fluoride

Diopside modified porous polyglycolide scaffolds with improved properties

RSC Advances ◽  
2015 ◽  
Vol 5 (68) ◽  
pp. 54822-54829 ◽  
Author(s):  
Pei Feng ◽  
Xiaoning Guo ◽  
Chengde Gao ◽  
Dan Gao ◽  
Tao Xiao ◽  
...  
Keyword(s):  
Selective Laser Sintering ◽  
Biological Properties ◽  
Laser Sintering ◽  
Porous Scaffolds

In this research, diopside was incorporated into PGA scaffolds for enhancing mechanical and biological properties. The porous scaffolds were fabricated via selective laser sintering.

Processing and Characterization of Apatite-Wollastonite Porous Scaffolds for Bone Tissue Engineering

2007 ◽  
Vol 361-363 ◽  
pp. 923-926 ◽  
Author(s):  
David J. Wood ◽  
J. Dyson ◽  
K. Xiao ◽  
Kenny W. Dalgarno ◽  
P. Genever
Keyword(s):  
Selective Laser Sintering ◽  
Glass Ceramics ◽  
Human Mesenchymal Stem Cells ◽  
Biological Properties ◽  
Laser Sintering ◽  
Porous Scaffolds ◽  
Allogenic Bone ◽  
Static Seeding ◽  
Economic Need

There is a clinical and socio-economic need to produce synthetic alternatives to autologous or allogenic bone grafts. Bioactive glasses and glass-ceramics offer great potential in this area. The aims of this study were to optimise production of apatite-wollastonite (A-W) glassceramic scaffolds produced by selective laser sintering, in terms of their physical and biological properties and to look at how human Mesenchymal Stem Cells (MSCs) responded to these 3-D scaffolds in vitro. An indirect selective laser sintering process successfully produced strong, porous scaffolds. Depending upon particle size(s) and infiltration of the porous structure, flexural strengths between 35 MPa and 100 MPa were obtained. Following static seeding of A-W scaffolds with MSCs, fluoresecent actin and nuclei staining, as observed by confocal microscopy, showed that these scaffolds supported the adherence of human MSC’s at time periods of up to 21 days. As such these seeded scaffolds show great potential for use in bone regenerative medicine.

Manufacture and Characterisation of Bioceramic Tissue Engineering Scaffolds Produced by Selective Laser Sintering

2007 ◽  
Author(s):  
K. Xiao ◽  
J. A. Dyson ◽  
K. W. Dalgarno ◽  
P. Genever ◽  
D. J. Wood ◽  
...  
Keyword(s):  
Glass Ceramic ◽  
Selective Laser Sintering ◽  
Human Mesenchymal Stem Cells ◽  
Biological Properties ◽  
Laser Sintering ◽  
Process Conditions ◽  
Tissue Engineering Scaffolds ◽  
Process Maps ◽  
Bone Replacement ◽  
Porous Bioceramic

Currently there is no adequate bone replacement available that combines a long implant life with complete integration and appropriate mechanical properties. This paper reports on the use of human mesenchymal stem cells (MSCs) to populate porous bioceramic scaffolds produced by selective laser sintering (SLS) to create bespoke bioactive bone replacement structures. Apatite-wollastonite glass ceramic was chosen for use in this study because of its combination of excellent mechanical and biological properties, and has been processed using an indirect SLS approach. Process maps have been developed to identify process conditions for the SLS stage of manufacture and an optimised furnace cycle for the material has been developed to ensure that the required material phases for bioactivity are present in the manufactured scaffold. Results from tissue culture with the MSC’s on the scaffolds (using confocal and scanning electron microscopy) show that MSCs adhere, spread and retain viability on the surface, and penetrate into the pores of apatite wollastonite (A-W) glass ceramic scaffolds over a 21 day culture period. The MSC’s also show strong indications of osteogenesis, indicating that the MSC’s are differentiating to osteoblasts. These results indicate good biocompatibility and osteo supportive capacity of SLS generated A-W scaffolds and excellent potential in bone replacement applications.

scholarly journals Indirect selective laser sintering of apatite—wollostonite glass—ceramic

2008 ◽  
Vol 222 (7) ◽  
pp. 1107-1114 ◽  
Author(s):  
K Xiao ◽  
K W Dalgarno ◽  
D J Wood ◽  
R D Goodridge ◽  
C Ohtsuki
Keyword(s):  
Glass Ceramic ◽  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Biological Properties ◽  
Laser Sintering ◽  
Bending Test ◽  
Processing Route ◽  
Test Results ◽  
Infiltration Process ◽  
Three Point Bending

This paper develops an indirect selective laser sintering (SLS) processing route for apatite—wollastonite (A—W) glass—ceramic, and shows that the processing route, which can create porous three-dimensional products suitable for bone implants or scaffolds, does not affect the excellent mechanical and biological properties of the glass—ceramic. ‘Green parts’ with fine integrity and well-defined shape have been produced from glass particles of single-size range or mixed-size ranges with acrylic binder in various ratios by weight. A subsequent heat treatment process has been developed to optimize the crystallization process, and an infiltration process has been explored to enhance mechanical strength. Three-point bending test results show flexural strengths of up to 102 MPa, dependent on porosity, and simulated body fluid (SBF) tests show that the laser sintered porous A—W has comparable biological properties to that of conventionally produced A—W.

Piezoelectric β-polymorph formation of new textiles by surface modification with coating process based on interfacial interaction on the conformational variation of poly (vinylidene fluoride) (PVDF) chains

2020 ◽  
Vol 91 (3) ◽  
pp. 31301
Author(s):  
Nabil Chakhchaoui ◽  
Rida Farhan ◽  
Meriem Boutaldat ◽  
Marwane Rouway ◽  
Adil Eddiai ◽  
...  
Keyword(s):  
High Efficiency ◽  
Vinylidene Fluoride ◽  
Research Work ◽  
Research Area ◽  
Interfacial Interaction ◽  
Tetraethyl Orthosilicate ◽  
Poly Vinylidene Fluoride ◽  
Carbon Nanofillers ◽  
The Impact ◽  
Advanced Applications

Novel textiles have received a lot of attention from researchers in the last decade due to some of their unique features. The introduction of intelligent materials into textile structures offers an opportunity to develop multifunctional textiles, such as sensing, reacting, conducting electricity and performing energy conversion operations. In this research work nanocomposite-based highly piezoelectric and electroactive β-phase new textile has been developed using the pad-dry-cure method. The deposition of poly (vinylidene fluoride) (PVDF) − carbon nanofillers (CNF) − tetraethyl orthosilicate (TEOS), Si(OCH2CH3)4 was acquired on a treated textile substrate using coating technique followed by evaporation to transform the passive (non-functional) textile into a dynamic textile with an enhanced piezoelectric β-phase. The aim of the study is the investigation of the impact the coating of textile via piezoelectric nanocomposites based PVDF-CNF (by optimizing piezoelectric crystalline phase). The chemical composition of CT/PVDF-CNC-TEOS textile was detected by qualitative elemental analysis (SEM/EDX). The added of 0.5% of CNF during the process provides material textiles with a piezoelectric β-phase of up to 50% has been measured by FTIR experiments. These results indicated that CNF has high efficiency in transforming the phase α introduced in the unloaded PVDF, to the β-phase in the case of nanocomposites. Consequently, this fabricated new textile exhibits glorious piezoelectric β-phase even with relatively low coating content of PVDF-CNF-TEOS. The study demonstrates that the pad-dry-cure method can potentially be used for the development of piezoelectric nanocomposite-coated wearable new textiles for sensors and energy harvesting applications. We believe that our study may inspire the research area for future advanced applications.

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