Inscribing wettability gradients onto polymer substrates with different stiffness using corona discharge in point-to-plane geometry

Eifert, Alexander; Petit, J.; Baier, Tobias; Bonaccurso, Elmar; Hardt, Steffen

doi:10.1016/j.apsusc.2014.12.169

Cited by 14 publications

(10 citation statements)

References 41 publications

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“…Corona-treatment is an example based on atmospheric discharge plasma generated by high voltage. This induces an oxygen rich surface which reduces the hydrophobicity of polymer surfaces (Eifert et al 2015). We compared the D.I water velocity in a microchannel with ethanol-treated PDMS and corona-treated PDMS.…”

Section: Resultsmentioning

confidence: 99%

On-chip whole blood plasma separator based on microfiltration, sedimentation and wetting contrast

et al. 2015

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Section: Resultsmentioning

confidence: 99%

On-chip whole blood plasma separator based on microfiltration, sedimentation and wetting contrast

et al. 2015

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“…In corona treatment, the intensity of the corona on the sample varies depending on distance from the electrode . Therefore, local corona dose, D , is a function of position, y , along the sample: where P ( y ) is the corona power distribution along y and t is the duration of exposure.…”

Section: Resultsmentioning

confidence: 99%

Corona Treatment for Nanotransfer Molding Adhesion

Deagen

Chan

Schadler

et al. 2019

ACS Appl. Polym. Mater.

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Corona discharge treatment offers a facile, robust, and scalable technique for adhesion promotion in nanotransfer molding. In contrast to conventional plasma treatment, which requires vacuum operation, corona treatment at ambient pressure enabled patterning of woodpile structures of PDMS with smaller feature dimensions (70 nm line width) and across a wider range of treatment doses. Similarities and differences between plasma (batch) and corona (continuous) treatment were established using dyne testing to capture the effects of treatment on surface wettability of PDMS. Evaluating spatiotemporal evolution of wettability through dyne tests enabled a common axis for direct comparison of the two process configurations in terms of dose. Both treatment types formed surface films of oxidized PDMS, which were characterized through compressive buckling tests of the PDMS–oxide bilayer. Corona treatment, by forming a thinner oxide film, extended the range of treatment doses and feature sizes exhibiting successful pattern transfer. Reduction in adhesion at high treatment dose was attributed to a weak boundary layer at the bonded interface. Demolding was studied via peel tests and AFM analysis to reveal that both plasma and corona treatment etch the stamp material (PFPE), underscoring the benefits of low treatment dose for process throughput as well as stamp lifetime. While both treatments displayed comparable etch rates as a function of dose, microscopic bumps on corona-etched stamps indicate a higher surface temperature compared to plasma-etched stamps. By optimizing adhesion for nanotransfer molding with a surface treatment well-suited to continuous processing, corona treatment provides a practical and economical approach to layer-by-layer additive manufacturing at the nanoscale.

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“…25 menggunakan dialildimetilamonium klorida dan (3-(trimetoksisilil)propil) oktadesildimetil amonium klorida untuk memberikan sifat antibakteri pada kain Kevlar ® menggunakan plasma lucutan pijar bertekanan atmosfir (atmospheric pressure glow discharge plasma). Plasma lucutan korona telah diteliti penggunaannya pada peningkatan daya celup 26,27 dan daya basah serta sifat pembasahan bahan tekstil [28][29][30] , dan penyempurnaan antibakteri 27,31,32 .…”

Section: Pendahuluanunclassified

Penyempurnaan Tahan Api Dan Antibakteri Pada Kain Kapas Dengan N-Metilol Dimetilfosfonopropionamida (Pyrovatex Cp New) Dan Kitosan Menggunakan Plasma Lucutan Korona

Widodo

Nuhiyah

Umam

et al. 2019

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ABSTRAKPlasma lucutan korona dengan konfigurasi elektroda multi titik-bidang telah digunakan pada studi ini untuk proses penyempurnaan tahan api dan antibakteri pada kain kapas menggunakan N-metilol dimetilfosfonopropionamida (MDFPA, Pyrovatex CP New) dan kitosan. Kain kapas diberi perlakuan dengan campuran Pyrovatex CP New 400 g/L, asam fosfor 80% 20 g/L, dan kitosan 10 g/L menggunakan metode benam peras-plasma, plasma-benam peras dan plasma-perendaman dengan variasi waktu pajanan plasma 5 -30 menit. Ketiga metode tersebut menghasilkan kain kapas yang tidak meneruskan pembakaran dengan panjang arang bervariasi antara 9,5 -12,2 cm tergantung waktu pemajanan. Sebagai perbandingan, kain kapas yang tidak diberi perlakuan memiliki waktu nyala dan bara masing-masing 7 dan 20 detik serta panjang arang 30 cm, sedangkan cara benam peras-pemanaswetan menghasilkan kain yang juga tidak meneruskan pembakaran tapi dengan panjang arang 16 cm. Hingga batas tertentu, arang yang tersisa semakin pendek dengan semakin lamanya waktu pajanan plasma karena waktu pemajanan yang terlalu lama justru menambah panjang arang. Cara plasma-perendaman menghasilkan aktifitas antibakteri yang relatif lebih tinggi dengan diameter daya hambat sebesar 14 mm daripada plasma-benam peras dan benam peras-plasma yang hanya menghasilkan daya hambat sebesar 13 mm. Meskipun belum maksimum, perlakuan kain kapas dengan Pyrovatex CP New dan kitosan menggunakan plasma lucutan korona telah memberikan sifat tahan api dan antibakteri yang cukup signifikan dan menjanjikan.Kata kunci: plasma lucutan korona, tahan api, antibakteri, N-metilol dimetilfosfonopropionamida, kitosan ABSTRACTCorona discharge plasma with multipoint-to-plane geometry had been used in this study to confer flame retardancy and antibacterial activity on cotton fabric by using commercially available flame retardant, N-methylol dimethylphosphonopropionamide (Pyrovatex CP New), and chitosan. The cotton fabric was treated with a mixture of Pyrovatex CP New 400 g/L, phosphorous acid 80% 20 g/L, and chitosan 10 g/L by three different methods, i.e. pad-dry-plasma, plasma-pad-dry, plasma-exhaust with plasma exposure time of 5 -30 minutes. All the three methods of treatment produced cotton fabric with no after-flame and after-glow time (0 s) and char-length of 9.5 -12.2 cm depending on the plasma exposure time. For comparison, the untreated cotton fabric had an after-flame and after-glow time of 7 and 20 s respectively, and char length of 30 cm, whereas pas-dry-cure gave the same zero after-flame and after-glow time but with a char length of 16 cm. On the other hand, plasma-exhaust gave higher antibacterial activity with inhibition zone of 3.5 mm, while the other two methods gave only 1.25 and 1.75 for plasma-pad-dry and pad-dry-plasma respectively. In summary, corona plasma treatment with Pyrovatex CP New and chitosan had given the cotton fabric a promising results and significant level of flame retardancy and modest antibacterial activity.

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Inscribing wettability gradients onto polymer substrates with different stiffness using corona discharge in point-to-plane geometry

Cited by 14 publications

References 41 publications

On-chip whole blood plasma separator based on microfiltration, sedimentation and wetting contrast

On-chip whole blood plasma separator based on microfiltration, sedimentation and wetting contrast

Corona Treatment for Nanotransfer Molding Adhesion

Penyempurnaan Tahan Api Dan Antibakteri Pada Kain Kapas Dengan N-Metilol Dimetilfosfonopropionamida (Pyrovatex Cp New) Dan Kitosan Menggunakan Plasma Lucutan Korona

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