Reversible adhesive-free nanoscale adhesion utilizing oppositely charged polyelectrolyte brushes

Motoyasu Kobayashi, Masami Terada, Atsushi Takahara

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

Two prepared silicon wafers bearing cationic and anionic polyelectrolyte brushes were joined with 2 μL of water under 0.098 MPa of pressure at room temperature. The bonded area was fixed at 5 × 10 mm2. A lap shear strength of 1.52 MPa was achieved through the adhesion of poly[2-(methacryloyloxy)ethyl trimethylammonium chloride] and poly(3-sulfopropyl methacrylate potassium salt) brush substrates due to electrostatic attractive interactions between the positively and negatively charged polymers. In contrast, the lap shear strength of bonded polymer brushes with like charges was only 0.027-0.072 MPa. The polyelectrolyte brushes remained on the substrates even after their separation in the lap shear test; and the brush substrates readhered in the presence of a small amount of water. Furthermore, the adhering substrates were smoothly debonded in aqueous NaCl solution due to the electrostatic interaction of the hydrated salt ions. However, the substrates did not separate in deionized water. In summary, reversible nanoscale adhesion was achieved using oppositely charged polyelectrolyte brushes combined with aqueous solution.

Original languageEnglish
Pages (from-to)5717-5722
Number of pages6
JournalSoft Matter
Volume7
Issue number12
DOIs
Publication statusPublished - Jun 21 2011

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brushes
Brushes
Polyelectrolytes
adhesives
Adhesives
adhesion
Adhesion
Substrates
shear strength
Coulomb interactions
Shear strength
Polymers
Bearings (structural)
Salts
electrostatics
water
aqueous solutions
salts
Water
Deionized water

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Reversible adhesive-free nanoscale adhesion utilizing oppositely charged polyelectrolyte brushes. / Kobayashi, Motoyasu; Terada, Masami; Takahara, Atsushi.

In: Soft Matter, Vol. 7, No. 12, 21.06.2011, p. 5717-5722.

Research output: Contribution to journalArticle

Kobayashi, Motoyasu ; Terada, Masami ; Takahara, Atsushi. / Reversible adhesive-free nanoscale adhesion utilizing oppositely charged polyelectrolyte brushes. In: Soft Matter. 2011 ; Vol. 7, No. 12. pp. 5717-5722.
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