Autonomous capillary microfluidic devices with constant flow rate and temperature-controlled valving

Lanhui  Li; Eiko Ysebrand Westerbeek; Jeroen Christiaan Vollenbroek; Lingling Shui; Mathieu  Odijk; Jan C.T. Eijkel

Autonomous capillary microfluidic devices with constant flow rate and temperature-controlled valving

Lanhui Li
, Eiko Ysebrand Westerbeek
, Jeroen Christiaan Vollenbroek
, Lingling Shui
, Mathieu Odijk
, Jan C.T. Eijkel

Research output: Contribution to conference › Paper › peer-review

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Abstract

We report a capillary microfluidic device with temperature triggered stop valve function. The device consists of a Poly(N-isopropylacrylamide) (PNIPAm) grafted PDMS channel with thermosensitive surface wettability and an integrated platinum heating wire. By locally switching the channel temperature between 20 and 36 °C, a switchable stop valve is obtained. Interestingly, we found that PNIPAm grafted PDMS channel shows a capillary filling rate that is constant in time instead of the well-known Washburn behavior. We explain this by contact-line friction. The device can be applied for real-time flow control with steady velocity field.

Original language	English
Pages	380-381
Number of pages	2
Publication status	Published - 2020
Event	24th International Conference on Miniaturized Systems for Chemistry and Life Sciences, µTAS 2020 - Virtual Event Duration: 4 Oct 2020 → 9 Oct 2020 Conference number: 24 https://microtas2020.org/

Conference

Conference	24th International Conference on Miniaturized Systems for Chemistry and Life Sciences, µTAS 2020
Abbreviated title	MicroTAS 2020
City	Virtual Event
Period	4/10/20 → 9/10/20
Internet address	https://microtas2020.org/

Keywords

Capillary microfluidic
Responsive wettability
Stop valve
Constant flow rate

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@conference{f866b17428dd437f8737798753c97785,

title = "Autonomous capillary microfluidic devices with constant flow rate and temperature-controlled valving",

abstract = "We report a capillary microfluidic device with temperature triggered stop valve function. The device consists of a Poly(N-isopropylacrylamide) (PNIPAm) grafted PDMS channel with thermosensitive surface wettability and an integrated platinum heating wire. By locally switching the channel temperature between 20 and 36 °C, a switchable stop valve is obtained. Interestingly, we found that PNIPAm grafted PDMS channel shows a capillary filling rate that is constant in time instead of the well-known Washburn behavior. We explain this by contact-line friction. The device can be applied for real-time flow control with steady velocity field.",

keywords = "Capillary microfluidic, Responsive wettability, Stop valve, Constant flow rate",

author = "Lanhui Li and Westerbeek, \{Eiko Ysebrand\} and Vollenbroek, \{Jeroen Christiaan\} and Lingling Shui and Mathieu Odijk and Eijkel, \{Jan C.T.\}",

year = "2020",

language = "English",

pages = "380--381",

note = "24th International Conference on Miniaturized Systems for Chemistry and Life Sciences, µTAS 2020, MicroTAS 2020 ; Conference date: 04-10-2020 Through 09-10-2020",

url = "https://microtas2020.org/",

}

Autonomous capillary microfluidic devices with constant flow rate and temperature-controlled valving. / Li, Lanhui ; Westerbeek, Eiko Ysebrand; Vollenbroek, Jeroen Christiaan et al.
2020. 380-381 Paper presented at 24th International Conference on Miniaturized Systems for Chemistry and Life Sciences, µTAS 2020, Virtual Event.

Research output: Contribution to conference › Paper › peer-review

TY - CONF

T1 - Autonomous capillary microfluidic devices with constant flow rate and temperature-controlled valving

AU - Li, Lanhui

AU - Westerbeek, Eiko Ysebrand

AU - Vollenbroek, Jeroen Christiaan

AU - Shui, Lingling

AU - Odijk, Mathieu

AU - Eijkel, Jan C.T.

N1 - Conference code: 24

PY - 2020

Y1 - 2020

N2 - We report a capillary microfluidic device with temperature triggered stop valve function. The device consists of a Poly(N-isopropylacrylamide) (PNIPAm) grafted PDMS channel with thermosensitive surface wettability and an integrated platinum heating wire. By locally switching the channel temperature between 20 and 36 °C, a switchable stop valve is obtained. Interestingly, we found that PNIPAm grafted PDMS channel shows a capillary filling rate that is constant in time instead of the well-known Washburn behavior. We explain this by contact-line friction. The device can be applied for real-time flow control with steady velocity field.

AB - We report a capillary microfluidic device with temperature triggered stop valve function. The device consists of a Poly(N-isopropylacrylamide) (PNIPAm) grafted PDMS channel with thermosensitive surface wettability and an integrated platinum heating wire. By locally switching the channel temperature between 20 and 36 °C, a switchable stop valve is obtained. Interestingly, we found that PNIPAm grafted PDMS channel shows a capillary filling rate that is constant in time instead of the well-known Washburn behavior. We explain this by contact-line friction. The device can be applied for real-time flow control with steady velocity field.

KW - Capillary microfluidic

KW - Responsive wettability

KW - Stop valve

KW - Constant flow rate

M3 - Paper

SP - 380

EP - 381

T2 - 24th International Conference on Miniaturized Systems for Chemistry and Life Sciences, µTAS 2020

Y2 - 4 October 2020 through 9 October 2020

ER -

Autonomous capillary microfluidic devices with constant flow rate and temperature-controlled valving

Abstract

Conference

Keywords

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