Plasma treatment of PTFE at elevated temperature: The effect of surface properties on its biological performance

Řezníčková, Alena; Sajdl, Petr; Nguyenova, Hoang Yen; Lacmanova, Veronika; Kolská, Zdeňka; Kasálková, Nikola Slepičková; Kvítek, Ondřej; Švorčı́k, Václav

doi:10.1016/j.mtcomm.2022.103254

Cited by 5 publications

(5 citation statements)

References 44 publications

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“…Polytetrafluoroethylene (PTFE) plates were used between two Thermo‐heated plates due to its poor adhesion to other materials. [ 25 ] The pressure and temperature were set to 3 MPa and 180°C respectively. The holding time was maintained about 20 min.…”

Section: Methodsmentioning

confidence: 99%

Investigation and prediction of mechanical properties of hot water treated jute/poly(lactic acid) composite laminates using response surface methodology and genetic algorithm

Zhang

2022

Polymer Composites

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The main objective of this work was to estimate the usefulness of response surface methodology (RSM) and genetic algorithm (GA) in modeling and predicting the strength of jute/poly(lactic acid) (PLA) composite laminates. Firstly, the impact of the hot water treatment on the thermal, molecular structure, and morphological characterizations as well as kinetic analysis of jute fibers were performed by Thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM). The FTIR results showed that the hot water treatments reduced the content of lignin, hemicellulose, and impurities of the fibers. Hot water treated fibers exhibited higher thermal stabilities compared with untreated fibers as shown with TGA results. The SEM results showed effect contact surface area improved after the hot water treatment, leading to better mechanical properties of bio‐composites. Secondly, the influences of the ply orientation, plies and fiber content on the tensile strength and flexural strength of the hot water treated fibers composites were evaluated by RSM. RSM with the Box Behnken Design was utilized to establish the quadratic models of two objectives in response to input parameters. Analysis of variance (ANOVA) was used to determine percentage contribution of various parameters on two quality objectives. According to the ANOVA results, ply orientation had the most important impact on tensile strength while the ply orientation‐fiber content interaction had the most important impact on flexural strength. Finally, multi‐objective optimization was carried out to maximize tensile strength and flexural strength using the desirability function and GA. The optimized results both showed an acceptable relative error between experimental and optimized values.

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Section: Methodsmentioning

confidence: 99%

Investigation and prediction of mechanical properties of hot water treated jute/poly(lactic acid) composite laminates using response surface methodology and genetic algorithm

Zhang

2022

Polymer Composites

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“…Therefore, the hemocompatibility of DLVGs and NPVGs in vitro was investigated. PTFE was also used as a reference because of its biocompatibility, chemical inertness, and low surface energy [48,49]. Before the measurements, the walls of the tubes were cut into discs with a diameter of 6 mm and immersed in normal saline until equilibrium was reached.…”

Section: Hemocompatibility Assaymentioning

confidence: 99%

Fabrication of mechanical skeleton of small-diameter vascular grafts via rolling on water surface

Yang

Zhao

et al. 2023

Biomed. Mater.

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Mimicking the multilayered structure of blood vessels and constructing a porous inner surface are two effective approaches to achieve mechanical matching and rapid endothelialization to reduce occlusion in small-diameter vascular grafts. However, the fabrication processes are complex and time consuming, thus complicating the fabrication of personalized vascular grafts. A simple and versatile strategy is proposed to prepare the skeleton of vascular grafts by rolling self-adhesive polymer films. These polymer films are directly fabricated by dropping a polymer solution on a water surface. For the tubes, the length and wall thickness are controlled by the rolling number and position of each film, whereas the structure and properties are tailored by regulating the solution composition. Double-layer vascular grafts (DLVGs) with microporous inner layers and impermeable outer layers are constructed; a microporous layer is formed by introducing a hydrophilic polymer into a polyurethane (PU) solution. DLVGs exhibit a J-shaped stress–strain deformation profile and compliance comparable to that of coronary arteries, sufficient suture retention strength and burst pressure, suitable hemocompatibility, significant adhesion, and proliferation of human umbilical vein endothelial cells. Freshly prepared PU tubes exhibit good cytocompatibility. Thus, this strategy demonstrates potential for rapid construction of small-diameter vascular grafts for individual customization.

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“…9,10 These efforts have primarily focused on the introduction of hydrophilic components to modify the PTFE surface. The most well-reported methods are compositing, 11,12 chemical etching, 13,14 plasma treatment, 15,16 surface coating 17,18 and irradiation. 19,20 Recently, a significant proportion of irradiation treatment methods have been employed to facilitate the formation of chemical bonds.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Achieving durable hydrophilic modification of polytetrafluoroethylene (PTFE) through organic/inorganic hybridization strategy

Ding,

Wei,

Guo

et al. 2024

New J. Chem.

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Plasma treatment of PTFE at elevated temperature: The effect of surface properties on its biological performance

Cited by 5 publications

References 44 publications

Investigation and prediction of mechanical properties of hot water treated jute/poly(lactic acid) composite laminates using response surface methodology and genetic algorithm

Investigation and prediction of mechanical properties of hot water treated jute/poly(lactic acid) composite laminates using response surface methodology and genetic algorithm

Fabrication of mechanical skeleton of small-diameter vascular grafts via rolling on water surface

Achieving durable hydrophilic modification of polytetrafluoroethylene (PTFE) through organic/inorganic hybridization strategy

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