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Related Experiment Video

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Engineering Platform and Experimental Protocol for Design and Evaluation of a Neurally-controlled Powered Transfemoral Prosthesis

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Smart transportation between three phases through a stimulus-responsive functionally cooperating device.

Guannan Ju¹, Mengjiao Cheng, Meng Xiao

¹State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)

|May 3, 2013

Summary

This summary is machine-generated.

A smart device with a temperature-responsive polymer coating exhibits a diving-surfacing cycle. This smart material also enables controlled delivery of molecules between different phases.

Keywords:

functionally cooperating devices smart transportation superhydrophilicity superhydrophobicity temperature-responsive polymers

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Area of Science:

Materials Science
Polymer Science
Surface Chemistry

Background:

Smart materials respond to external stimuli like temperature.
Superhydrophobicity and superhydrophilicity are key surface properties.
Controlled molecular delivery is crucial in various applications.

Purpose of the Study:

To develop a novel smart device with a temperature-responsive polymer coating.
To investigate the diving-surfacing behavior of the device in response to temperature changes.
To explore the device's capability for directional delivery of lipophilic molecules.

Main Methods:

Fabrication of a smart device using a nickel foam cube, platinum strip, steel bead, and temperature-responsive polymer.
Observation of the device's movement (diving-surfacing cycle) in water with controlled temperature fluctuations.
Assessment of the polymer's surface properties (superhydrophobicity to superhydrophilicity transition) at the lower critical solution temperature (LCST).
Evaluation of the device's capacity for transporting lipophilic molecules between three phases.

Main Results:

The smart device successfully demonstrated a diving-surfacing cycle triggered by temperature changes around the polymer's LCST.
The polymer coating exhibited a reversible transition from superhydrophobicity to superhydrophilicity.
The device facilitated a cycled, directional delivery of lipophilic molecules across different phases.

Conclusions:

The developed smart device offers a novel approach for temperature-controlled actuation.
The reversible superhydrophobicity/superhydrophilicity transition is key to the device's functionality.
This smart material system shows potential for applications in controlled molecular transport and delivery.