Infuence of oxygen and nitrogen plasma treatment on polypropyleme (PP) bumper surface

Altuncu, Ekrem; Üstel, Fatih; Esen, Sevim Gökçe; Karayel, E.

doi:10.5604/17348412.1229664

Cited by 8 publications

(14 citation statements)

References 14 publications

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“…There are several advantages to surface activation of biomaterials with oxygen plasma beyond biocompatibility. Typically, surface oxidation for hydrophilization occurs only within a depth of 5–50 nm from the surface, indicating that plasma activation does not alter the bulk properties of the materials 41,42 . Therefore, the materials can maintain their mechanical properties such as strength, flexibility, formability, stability/degradability while the surfaces are modified to be more bioactive 18 .…”

Section: Discussionmentioning

confidence: 99%

Surface activation with oxygen plasma promotes osteogenesis with enhanced extracellular matrix formation in three‐dimensional microporous scaffolds

Yamada

Yassin

Weigel

et al. 2021

J Biomedical Materials Res

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Various types of synthetic polyesters have been developed as biomaterials for tissue engineering. These materials commonly possess biodegradability, biocompatibility, and formability, which are preferable properties for bone regeneration. The major challenge of using synthetic polyesters is the result of low cell affinity due to their hydrophobic nature, which hinders efficient cell seeding and active cell dynamics. To improve wettability, plasma treatment is widely used in industry. Here, we performed surface activation with oxygen plasma to hydrophobic copolymers, poly(l‐lactide‐co‐trimethylene carbonate), which were shaped in 2D films and 3D microporous scaffolds, and then we evaluated the resulting surface properties and the cellular responses of rat bone marrow stem cells (rBMSC) to the material. Using scanning electron microscopy and Fourier‐transform infrared spectroscopy, we demonstrated that short‐term plasma treatment increased nanotopographical surface roughness and wettability with minimal change in surface chemistry. On treated surfaces, initial cell adhesion and elongation were significantly promoted, and seeding efficiency was improved. In an osteoinductive environment, rBMSC on plasma‐treated scaffolds exhibited accelerated osteogenic differentiation with osteogenic markers including RUNX2, osterix, bone sialoprotein, and osteocalcin upregulated, and a greater amount of collagen matrix and mineral deposition were found. This study shows the utility of plasma surface activation for polymeric scaffolds in bone tissue engineering.

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Section: Discussionmentioning

confidence: 99%

Surface activation with oxygen plasma promotes osteogenesis with enhanced extracellular matrix formation in three‐dimensional microporous scaffolds

Yamada

Yassin

Weigel

et al. 2021

J Biomedical Materials Res

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“…Moreover, the use of this well-known technique for activation of electrospun fibers is currently described in only relatively few publications [ 93 , 94 , 95 , 96 ] and requires a comprehensive investigation and optimal adjustment of the plasma treatment parameters to maintain the mechanical and teno-inductive integrity. Nitrogen (N 2 ) plasma could represent an ideal working gas due to its less aggressivity and destructivity compared to oxidizing plasma (O 2 ) that lead to surface etching and destruction due to its high molecular size [ 97 , 98 ].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Plasma Surface Activation of Aligned Electrospun PLGA Fiber Fleeces with Improved Adhesion and Infiltration of Amniotic Epithelial Stem Cells Maintaining their Teno-inductive Potential

et al. 2020

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Electrospun PLGA microfibers with adequate intrinsic physical features (fiber alignment and diameter) have been shown to boost teno-differentiation and may represent a promising solution for tendon tissue engineering. However, the hydrophobic properties of PLGA may be adjusted through specific treatments to improve cell biodisponibility. In this study, electrospun PLGA with highly aligned microfibers were cold atmospheric plasma (CAP)-treated by varying the treatment exposure time (30, 60, and 90 s) and the working distance (1.3 and 1.7 cm) and characterized by their physicochemical, mechanical and bioactive properties on ovine amniotic epithelial cells (oAECs). CAP improved the hydrophilic properties of the treated materials due to the incorporation of new oxygen polar functionalities on the microfibers’ surface especially when increasing treatment exposure time and lowering working distance. The mechanical properties, though, were affected by the treatment exposure time where the optimum performance was obtained after 60 s. Furthermore, CAP treatment did not alter oAECs’ biocompatibility and improved cell adhesion and infiltration onto the microfibers especially those treated from a distance of 1.3 cm. Moreover, teno-inductive potential of highly aligned PLGA electrospun microfibers was maintained. Indeed, cells cultured onto the untreated and CAP treated microfibers differentiated towards the tenogenic lineage expressing tenomodulin, a mature tendon marker, in their cytoplasm. In conclusion, CAP treatment on PLGA microfibers conducted at 1.3 cm working distance represent the optimum conditions to activate PLGA surface by improving their hydrophilicity and cell bio-responsiveness. Since for tendon tissue engineering purposes, both high cell adhesion and mechanical parameters are crucial, PLGA treated for 60 s at 1.3 cm was identified as the optimal construct.

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“…Takamatsu et al investigated the generation of H and OH radicals by a plasma jet of N 2 or O 2 using 5,5-dimethyl-1-pyrroline- N -oxide, and indicated that N 2 plasma generated more H and OH radicals than O 2 plasma . Altuncu et al plasma-treated polypropylene samples using an atmospheric N 2 or O 2 plasma activation unit and showed that the surface energy was higher in N 2 plasma than in O 2 plasma under the same process conditions . Barkhordari and Ganjovi examined the physical properties of the plasma jet generated from an O 2 /N 2 mixture, and observed that the electron density decreased as the proportion of O 2 in the O 2 /N 2 mixture increased .…”

Section: Resultsmentioning

confidence: 99%

“…32 Altuncu et al plasma-treated polypropylene samples using an atmospheric N 2 or O 2 plasma activation unit and showed that the surface energy was higher in N 2 plasma than in O 2 plasma under the same process conditions. 33 Barkhordari and Ganjovi examined the physical properties of the plasma jet generated from an O 2 / N 2 mixture, and observed that the electron density decreased as the proportion of O 2 in the O 2 /N 2 mixture increased. 34 When air was used in this device, the electron density increased and the electron impact dissociation reactions were promoted.…”

Section: = ×mentioning

confidence: 99%

Influence of Nozzle Shape on Partial Oxidation Reforming of Biogas Using Microwave Plasma

et al. 2021

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Biogas, composed of ∼60% CH 4 and ∼40% CO 2 , is a carbon-neutral fuel but suffers from low flame stability. Thus, for effective utilization, the combustion reaction must be enhanced or biogas must be upgraded. Herein, microwave plasma-assisted combustion was utilized for partial oxidation reforming of biogas to enhance the reforming reaction and to upgrade biogas. The characteristics of the biogas reforming process and effects of the nozzle shape were investigated using four different nozzles. The small thin nozzle suppressed microwave attenuation to the greatest extent and thus most effectively promoted the reforming reaction. Microwave plasma not only reformed CH 4 into H 2 and CO but also decomposed CO 2 (which does not have any calorific value) into CO (which has calorific value); thus, the maximum cold gas efficiency achieved with the small thin nozzle was 112.7%, and the biogas was upgraded. Biogas reforming using O 2 as an oxidizer was also evaluated to improve the cold gas efficiency, but the cold gas efficiency undesirably decreased in this reaction relative to that using air with N 2 as the oxidizer because the reforming reactions are enhanced by increasing the active radicals like H and OH in the latter.

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Infuence of oxygen and nitrogen plasma treatment on polypropyleme (PP) bumper surface

Cited by 8 publications

References 14 publications

Surface activation with oxygen plasma promotes osteogenesis with enhanced extracellular matrix formation in three‐dimensional microporous scaffolds

Surface activation with oxygen plasma promotes osteogenesis with enhanced extracellular matrix formation in three‐dimensional microporous scaffolds

Fabrication and Plasma Surface Activation of Aligned Electrospun PLGA Fiber Fleeces with Improved Adhesion and Infiltration of Amniotic Epithelial Stem Cells Maintaining their Teno-inductive Potential

Influence of Nozzle Shape on Partial Oxidation Reforming of Biogas Using Microwave Plasma

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