Fabrication of polytetrafluoroethylene nanofibrous membranes for guided bone regeneration

Park, Jin‐Young; Lee, Jung‐Hee; Kim, Chun-Ho; Kim, Young‐Jin

doi:10.1039/c8ra05637d

Cited by 27 publications

(18 citation statements)

References 21 publications

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“…The C−C bond belongs to the carbon-based materials and PTFE chain. 28 The CF α and CF β indicate the different structures of PTFE in samples. Because the XPS spectra were collected on the surface of the macroporous substrate, in this region, the PTFE was mainly connected with carbon fibers.…”

Section: Resultsmentioning

confidence: 99%

Optimizing the Mass-Transfer Efficiency of a Microporous Layer for High-Performance Proton Exchange Membrane Fuel Cells

et al. 2021

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To facilitate mass transfer in proton exchange membrane fuel cells (PEMFCs), carbon-based gel was used to fabricate micron-scale ordered indentations on the surface of the microporous layer (MPL). The high viscosity of carbon-based gel prevented the intrusion of slurry into the pores of macroporous substrate (MPS), providing more space for rapid mass transfer in the gas diffusion layer (GDL). The direction of ordered indentations was perpendicular to the direction of gas channels, working as an additional flow field at the interface of the catalyst layer and MPL. Besides, the indentations reduced the distance for water removal, providing an excellent water management efficiency. From measurements, the maximum power density of membrane electrode assembly (MEA) containing homemade GDL was 8.5% higher than that of MEA containing commercial GDL. Cyclic compressive loading on MEAs was carried out to in situ evaluate the correlation between mechanical degradation and mass-transfer efficiency. After being compressed five times, the mass-transfer efficiency of MEA containing homemade GDL was stable, but the MEA containing commercial GDL degraded seriously. From the structure and composition analysis, it is that commercial GDL revealed deformation of structure and a serious loss of hydrophobic materials after cyclic compressive loading. In contrast, the homemade GDL revealed high mechanical stability. In summary, this structural design of GDL is a promising strategy to improve the property of MEA for high-performance PEMFCs.

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Section: Resultsmentioning

confidence: 99%

Optimizing the Mass-Transfer Efficiency of a Microporous Layer for High-Performance Proton Exchange Membrane Fuel Cells

et al. 2021

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“…Therefore, a number of electrospun composite materials obtained from solutions of polymers with excellent mechanical properties have been presented. For instance, Park et al [ 59 ] fabricated electrospun materials for BTE on the basis of PEO solutions containing polytetrafluoroethylene (PTFE) dispersions. PTFE possesses a great fracture toughness, but remains highly difficult to conduct the electrospinning.…”

Section: Modern Polymer-based Fibrous Compositesmentioning

confidence: 99%

Fibrous Polymer-Based Composites Obtained by Electrospinning for Bone Tissue Engineering

2021

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Currently, the significantly developing fields of tissue engineering related to the fabrication of polymer-based materials that possess microenvironments suitable to provide cell attachment and promote cell differentiation and proliferation involve various materials and approaches. Biomimicking approach in tissue engineering is aimed at the development of a highly biocompatible and bioactive material that would most accurately imitate the structural features of the native extracellular matrix consisting of specially arranged fibrous constructions. For this reason, the present research is devoted to the discussion of promising fibrous materials for bone tissue regeneration obtained by electrospinning techniques. In this brief review, we focus on the recently presented natural and synthetic polymers, as well as their combinations with each other and with bioactive inorganic incorporations in order to form composite electrospun scaffolds. The application of several electrospinning techniques in relation to a number of polymers is touched upon. Additionally, the efficiency of nanofibrous composite materials intended for use in bone tissue engineering is discussed based on biological activity and physiochemical characteristics.

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“…Polytetrafluoroethylene (PTFE) is known for its high fracture toughness [140], but its lack of spinnability remains a challenge. Park et al [141] prepared a polyethylene oxide (PEO) solution containing PTFE dispersion for electrospinning. The use of PEO effectively improved PTFE spinnability and then PEO was removed by sintering process.…”

Section: Mechanical Supportmentioning

confidence: 99%

Fibers by Electrospinning and Their Emerging Applications in Bone Tissue Engineering

et al. 2021

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Bone tissue engineering (BTE) is an optimized approach for bone regeneration to overcome the disadvantages of lacking donors. Biocompatibility, biodegradability, simulation of extracellular matrix (ECM), and excellent mechanical properties are essential characteristics of BTE scaffold, sometimes including drug loading capacity. Electrospinning is a simple technique to prepare fibrous scaffolds because of its efficiency, adaptability, and flexible preparation of electrospinning solution. Recent studies about electrospinning in BTE are summarized in this review. First, we summarized various types of polymers used in electrospinning and methods of electrospinning in recent work. Then, we divided them into three parts according to their main role in BTE, (1) ECM simulation, (2) mechanical support, and (3) drug delivery system.

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Fabrication of polytetrafluoroethylene nanofibrous membranes for guided bone regeneration

Abstract: In this study, PTFE nanofibrous membranes were fabricated by sintering the previously electrospun polytetrafluoroethylene (PTFE)/poly(ethylene oxide) (PEO) nanofibrous membranes.

Cited by 27 publications

References 21 publications

Optimizing the Mass-Transfer Efficiency of a Microporous Layer for High-Performance Proton Exchange Membrane Fuel Cells

Optimizing the Mass-Transfer Efficiency of a Microporous Layer for High-Performance Proton Exchange Membrane Fuel Cells

Fibrous Polymer-Based Composites Obtained by Electrospinning for Bone Tissue Engineering

Fibers by Electrospinning and Their Emerging Applications in Bone Tissue Engineering

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