Oberflächenaktivierung von Kunststoff mittels Plasma zur Haftvermittlung

Stöhr, Uwe

doi:10.1002/vipr.201500579

Cited by 6 publications

(3 citation statements)

References 1 publication

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“…4,5 Plasma activation can be applied to a wider variety of polymers but its effect is not stable over time and is difficult to control. 6 Since 2017, the European chemicals regulation addressed by REACH restricts the use of carcinogenic and genotoxic chromium(VI). Stringent regulations by EPA (Environmental Protection Agency) and OSHA (Occupational Safety and Health Administration) are expected to hamper the overall growth of plastic metallization in the upcoming years.…”

Section: Introductionmentioning

confidence: 99%

“…To obtain long-term stable metal–plastic adhesion necessary for practical application, multiple time- and energy-intensive cleaning and activation steps like etching with solutions based on toxic chromium sulfuric acid, plasma activation, or application of primers containing volatile, hazardous organic solvents are required. , These techniques are often material-specific, which sets narrow limits for metallizable polymers. On a technical scale, mostly acrylonitrile–butadiene–styrene is used as the plating plastic because of its good etching ability. , Plasma activation can be applied to a wider variety of polymers but its effect is not stable over time and is difficult to control . Since 2017, the European chemicals regulation addressed by REACH restricts the use of carcinogenic and genotoxic chromium(VI).…”

Section: Introductionmentioning

confidence: 99%

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Dopamine-Supported Metallization of Polyolefins─A Contribution to Transfer to an Eco-friendly and Efficient Technological Process

Augustine

Putzke

Janke

et al. 2022

ACS Appl. Mater. Interfaces

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Metallization is a common method to produce functional or decorative coatings on plastic surfaces. State-of-the-art technologies require energy-intensive process steps and the use of organic solvents or hazardous substances to achieve sufficient adhesion between the polymer and the metal layer. The present study introduces a facile bio-inspired "green" approach to improve this technology: the use of dopamine, a smallmolecule mimic of the main structural component of adhesive mussel proteins, as an adhesion promoter. To understand dopamine adhesion and identify conditions for successful metallization, polyethylene surfaces were dip-coated with dopamine and metallized with nickel by electroless metallization; essential parameters such as temperature, pH value, concentration of dopamine and buffer, and the deposition time were systematically varied. Effects of adding oxidants to the dopamine bath, cross-linking, thermal and UV post-treatment of the polydopamine film, and plasma pretreatment of the substrate were investigated. The properties of the polydopamine layer and the quality of the metal film were studied by physico-chemical, optical, and mechanical techniques. It was shown that simple dip-coating of the substrate with dopamine under optimal conditions is sufficient to support metal layers with a good optical quality. Technologically relevant metal layer quality and adhesion were obtained with annealed and UV-treated polydopamine films and enhanced by plasma pretreatment of the substrate. The study shows that dopamine provides a new interfacial design for plastic metallization that can reduce energy consumption, use of hazardous substances, and reject rate during manufacturing. The results are essential findings for further technological developments of a universal platform to promote adhesion between plastics and metal or potentially also other material classes, enabling economic material development and more eco-friendly applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dopamine-Supported Metallization of Polyolefins─A Contribution to Transfer to an Eco-friendly and Efficient Technological Process

Augustine

Putzke

Janke

et al. 2022

ACS Appl. Mater. Interfaces

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“…We included one plasma-and two chemically modified PEEK surfaces in order to account for the influence of different surface compositions. Plasma treatment of PEEK has been demonstrated with various modifications [9][10][11] in order to obtain significant changes in the surface properties as increase in surface energy [12], creation of functional groups or influence on cell growth cell growth [13]. However, non-specific protein adsorption on plasma-modified PEEK has not been addressed in literature so far.…”

Section: Introductionmentioning

confidence: 99%

Non-Specific Protein Adsorption on Polyetheretherketones -Challenges for Application as Biomaterial

Petersen

2019

MAMS

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This work deals with the investigation of the non-specific protein adsorption on polyetheretherketones (PEEK). As this polymer has positive characteristics like high comparable mechanical properties to bone and bio-inertness, it is more and more used as implant material in orthopaedics and dentistry. However, non-specific protein adsorption to PEEK has not been investigated in detail and can be a challenge for surface bioconjugation, as one method to enhance bone-PEEK contact. Here, we analysed and compared the influence of different PEEK-surfaces, modified via plasma-and wet-chemical processes. First, the surfaces of the various modified PEEK films were characterized regarding surface properties. In addition, the protein adsorption on differently modified films was quantified at the model of bovine serum albumin via an adapted protein assay. Striking is the comparison of contact angle measurement with the protein adsorption, evidencing higher protein adsorption with increased hydrophobicity of PEEK surfaces. The pure PEEK-film is extremely hydrophobic and shows the highest protein loading. Chemically treated films show a slightly lower contact angle and also a slightly decreased protein adsorption, while the plasma treated films, show a very low contact angle immediately after modification and a very low protein adsorption. However, in another measurement after 14 day of storage a significant increase in protein adsorption and contact angle was recognized. This result clarifies how PEEK surface modification affects non-specific protein adsorption.

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Development of thermoplastic films for ultrasonic manufacturing of printed circuit boards

Hopmann

Höfs

Schomburg³

et al. 2018

Adv Polym Technol

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Conventional production processes of PCB involve a high amount of complex production steps and the use of hazardous chemicals. Furthermore, a great effort is required for their recycling. Ultrasonic hot embossing of coextruded films, filled with electrical conductive fillers, could be an economic and ecological alternative for the production of PCB. This study focuses on the identification of suitable filler–matrix combinations for the isotropic and anisotropic conductive film layers. Hence, monolayer films with different fillers and filler contents are extruded. Conductivities of 8.31 and 12 S/m were measured in cross and machine direction, respectively, for a polypropylene‐film with 10 wt.‐% of CNT. This is two magnitudes below the required 535 S/m. With 70 mS/m, the conductivity in thickness direction is 115–170 times lower. This is caused by process‐related surface layers with low filler content. For steel fibers, no electrical conductivity can be measured.

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Oberflächenaktivierung von Kunststoff mittels Plasma zur Haftvermittlung

Cited by 6 publications

References 1 publication

Dopamine-Supported Metallization of Polyolefins─A Contribution to Transfer to an Eco-friendly and Efficient Technological Process

Dopamine-Supported Metallization of Polyolefins─A Contribution to Transfer to an Eco-friendly and Efficient Technological Process

Non-Specific Protein Adsorption on Polyetheretherketones -Challenges for Application as Biomaterial

Development of thermoplastic films for ultrasonic manufacturing of printed circuit boards

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