Cosolvency-Induced Switching of the Adhesion between Poly(methyl methacrylate) Brushes

Yunlong Yu; B.D. Kieviet; E. Kutnyanszky; Gyula J. Vancso; Sissi de Beer

doi:10.1021/mz500775w

Cosolvency-Induced Switching of the Adhesion between Poly(methyl methacrylate) Brushes

Yunlong Yu, B.D. Kieviet, E. Kutnyanszky, Gyula J. Vancso, Sissi de Beer

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Abstract

We present a simple method to reversibly switch the adhesive force between two surfaces that are decorated with poly(methyl methacrylate) (PMMA) graft polymers. By employment of a PMMA/isopropanol/water or a PMMA/ethanol/water cosolvent system, we can tune the swelling of the brushes. In pure isopropanol or ethanol the polymer grafts are collapsed, and the adhesion is high when the contacting brushes are pulled apart. In an 80–20 vol % isopropanol–water or ethanol–water composition, the brushes are swollen. In these systems the adhesion is approximately 5 times smaller compared to the adhesion measured in the pure solvent systems. Moreover, we show that PMMA/isopropanol/water cosolvent systems perform better as switchable adhesives than PMMA/ethanol/water cosolvent systems. In the latter pulling events can arise when the swollen brushes are kept in contact for a longer time, such that the adhesion hysteresis can become large and the surface coating can be damaged due to bond-breaking events.

Original language	English
Pages (from-to)	75-79
Journal	ACS macro letters
Volume	4
Issue number	1
DOIs	https://doi.org/10.1021/mz500775w
Publication status	Published - 2015

Keywords

IR-99868
METIS-314542

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10.1021/mz500775w

cosolvency
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title = "Cosolvency-Induced Switching of the Adhesion between Poly(methyl methacrylate) Brushes",

abstract = "We present a simple method to reversibly switch the adhesive force between two surfaces that are decorated with poly(methyl methacrylate) (PMMA) graft polymers. By employment of a PMMA/isopropanol/water or a PMMA/ethanol/water cosolvent system, we can tune the swelling of the brushes. In pure isopropanol or ethanol the polymer grafts are collapsed, and the adhesion is high when the contacting brushes are pulled apart. In an 80–20 vol % isopropanol–water or ethanol–water composition, the brushes are swollen. In these systems the adhesion is approximately 5 times smaller compared to the adhesion measured in the pure solvent systems. Moreover, we show that PMMA/isopropanol/water cosolvent systems perform better as switchable adhesives than PMMA/ethanol/water cosolvent systems. In the latter pulling events can arise when the swollen brushes are kept in contact for a longer time, such that the adhesion hysteresis can become large and the surface coating can be damaged due to bond-breaking events.",

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T1 - Cosolvency-Induced Switching of the Adhesion between Poly(methyl methacrylate) Brushes

AU - Yu, Yunlong

AU - Kieviet, B.D.

AU - Kutnyanszky, E.

AU - Vancso, Gyula J.

AU - de Beer, Sissi

N1 - Open access

PY - 2015

Y1 - 2015

N2 - We present a simple method to reversibly switch the adhesive force between two surfaces that are decorated with poly(methyl methacrylate) (PMMA) graft polymers. By employment of a PMMA/isopropanol/water or a PMMA/ethanol/water cosolvent system, we can tune the swelling of the brushes. In pure isopropanol or ethanol the polymer grafts are collapsed, and the adhesion is high when the contacting brushes are pulled apart. In an 80–20 vol % isopropanol–water or ethanol–water composition, the brushes are swollen. In these systems the adhesion is approximately 5 times smaller compared to the adhesion measured in the pure solvent systems. Moreover, we show that PMMA/isopropanol/water cosolvent systems perform better as switchable adhesives than PMMA/ethanol/water cosolvent systems. In the latter pulling events can arise when the swollen brushes are kept in contact for a longer time, such that the adhesion hysteresis can become large and the surface coating can be damaged due to bond-breaking events.

AB - We present a simple method to reversibly switch the adhesive force between two surfaces that are decorated with poly(methyl methacrylate) (PMMA) graft polymers. By employment of a PMMA/isopropanol/water or a PMMA/ethanol/water cosolvent system, we can tune the swelling of the brushes. In pure isopropanol or ethanol the polymer grafts are collapsed, and the adhesion is high when the contacting brushes are pulled apart. In an 80–20 vol % isopropanol–water or ethanol–water composition, the brushes are swollen. In these systems the adhesion is approximately 5 times smaller compared to the adhesion measured in the pure solvent systems. Moreover, we show that PMMA/isopropanol/water cosolvent systems perform better as switchable adhesives than PMMA/ethanol/water cosolvent systems. In the latter pulling events can arise when the swollen brushes are kept in contact for a longer time, such that the adhesion hysteresis can become large and the surface coating can be damaged due to bond-breaking events.

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