Corona-discharge-induced hydrophobicity loss and recovery of silicones

Kim, J.; Chaudhury, Manoj K.

doi:10.1109/ceidp.1999.807902

Cited by 24 publications

(7 citation statements)

References 8 publications

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“…The findings of this study are consistent with many published results of previous studies on hydrophobic cyclo-aliphatic epoxy. As expected, standard CEP, which is not designed to yield a hydrophobicity transfer effect, showed higher leakage current activity than other tested materials [16,17] .…”

Section: Leakage Current Suppression Capabilitysupporting

confidence: 55%

Composite insulators and their aging: An overview

Amin

Akbar

Salman

2007

Sci. China Ser. E-Technol. Sci.

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The aging (biological deterioration) is a major problem of composite insulators now-a-days. The main thing in aging is to predict how, when and with what speed it occurs and under what conditions it can lead to failure and what overall average expected life of a composite insulator is. For this a lot of researches have been done. This review summarizes the methods of artificial field testing (aging), natural testing, standards the developed for aging, techniques of analysis, results achieved until now about various parameters from various locations, handling guidelines and a conclusion on what is further needed.polymeric insulators, aging, composite, SEM

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Section: Leakage Current Suppression Capabilitysupporting

confidence: 55%

Composite insulators and their aging: An overview

Amin

Akbar

Salman

2007

Sci. China Ser. E-Technol. Sci.

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“…Corona discharge alters the surface chemistry of PDMS, yielding the formation of a thin and brittle layer with diminished hydrophobicity (Kim and Chaudhury 1999). We found that five seconds of corona was sufficient for imposing a hydrophilic line, tracing the channel wall.…”

Section: Resultsmentioning

confidence: 97%

Guided corona generates wettability patterns that selectively direct cell attachment inside closed microchannels

Dixon

Takayama

2010

Biomed Microdevices

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We present a method to create plasma mediated linear protein patterns along the lengths of simple one-inlet-one-outlet straight polydimethylsiloxane microchannels by biasing the delivery of corona discharge at the capillary openings. Pattern widths ranging from 500-1,000 microm were generated in 2 mm wide microchannels with lengths of 0.5, 1.0, or 1.5 cm. Corona-treated surfaces enabled the spatial alignment of C2C12 myoblasts to the adhesive protein-coated regions, facilitating myoblast differentiation into myotubes. Although limited in precision, this protein patterning technique offers the advantages of simplicity and low cost, making it attractive for educational and research environments that lack access to extensive microfabrication facilities. The results also provide a cautionary note to those using corona discharge to increase wettability of microchannels; the surface modification may not be uniform, even within single microchannels being treated depending on settings and positioning of the corona device tips.

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“…PDMS-PDMS interface bonding techniques such as hydrophobic bonding, oxygen plasma [5,6], corona discharge [7], partial curing method etc., have been used commonly and are still being optimized in the fabrication of PDMS-based microfluidic devices. Uncured PDMS adhesive is the method that provides maximum bonding strength of approximately 671 kPa, followed by partial curing and then the oxygen plasma method.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Studies on PDMS-PDMS Interface Bonding with Piranha Solution and its Swelling Effect

et al. 2012

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Abstract:In this paper, a low-cost yet effective method of irreversible bonding between two elastomeric polydimethylsiloxane (PDMS) interfaces using Piranha solution is investigated. Piranha solutions at a weight ratio of 3:1 using different acids and hydrogen peroxide were attempted. The average tensile strengths of the device bonded with concentrated sulfuric acid-based piranha solution and nitric acid-based piranha solution were found to be 200 ± 20 kPa and 100 ± 15 kPa respectively. A PDMS surface treated with Piranha Solution demonstrated an increase in hydrophilicity. In addition, relatively straightforward swelling studies of PDMS using a weight loss method with common organic solvents were also investigated. Experimental results show that hexane, toluene, ethyl acetate, n-propyl alcohol and acetone swell PDMS significantly over a duration of up to 1 h and above; PDMS samples reached a steady state of swelling only after 5 min of immersion in other solvents. This will enable researchers to develop devices for the future according to the interaction between the material and the solvents in contact.

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Corona-discharge-induced hydrophobicity loss and recovery of silicones

Cited by 24 publications

References 8 publications

Composite insulators and their aging: An overview

Composite insulators and their aging: An overview

Guided corona generates wettability patterns that selectively direct cell attachment inside closed microchannels

Quantitative Studies on PDMS-PDMS Interface Bonding with Piranha Solution and its Swelling Effect

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