Quantitative studies on PDMS-PDMS interface bonding with piranha solution and its swelling effect

Kai Seng Koh, Jitkai Chin, Joanna Chia, Choon Lai Chiang

Research output: Contribution to journalArticle

41 Citations (Scopus)

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.

LanguageEnglish
Pages427-441
Number of pages15
JournalMicromachines
Volume3
Issue number2
DOIs
Publication statusPublished - 4 May 2012
Externally publishedYes

Fingerprint

Polydimethylsiloxane
Swelling
Hydrophilicity
Nitric acid
Hexane
Sulfuric acid
Hydrogen peroxide
Acetone
Organic solvents
Toluene
Alcohols
Tensile strength
Acids
Costs

Cite this

Koh, Kai Seng ; Chin, Jitkai ; Chia, Joanna ; Chiang, Choon Lai. / Quantitative studies on PDMS-PDMS interface bonding with piranha solution and its swelling effect. In: Micromachines. 2012 ; Vol. 3, No. 2. pp. 427-441.
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Quantitative studies on PDMS-PDMS interface bonding with piranha solution and its swelling effect. / Koh, Kai Seng; Chin, Jitkai; Chia, Joanna; Chiang, Choon Lai.

In: Micromachines, Vol. 3, No. 2, 04.05.2012, p. 427-441.

Research output: Contribution to journalArticle

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