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Stimuli-responsive polymer grafted wrinkled intelligent surface, and preparation method and application thereof

A stimuli-responsive, high-molecular technology, applied in the direction of coating, etc., can solve the problems of complex process, poor controllability, single structure, etc., and achieve the effect of directional transmission, enhanced performance switching range, and simple preparation method

Active Publication Date: 2020-03-24
THE CHINESE UNIV OF HONG KONG SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are either complicated in process and high in cost, or have a single structure and poor controllability.

Method used

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  • Stimuli-responsive polymer grafted wrinkled intelligent surface, and preparation method and application thereof
  • Stimuli-responsive polymer grafted wrinkled intelligent surface, and preparation method and application thereof
  • Stimuli-responsive polymer grafted wrinkled intelligent surface, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0061] The invention provides a method for preparing a wrinkled smart surface grafted with a stimuli-responsive polymer, which comprises the following steps:

[0062] S1. Grafting a stimuli-responsive polymer onto the surface of a sample with a wrinkled structure.

[0063] In this application, the stimuli-responsive polymer is grafted onto the wrinkled structure by selecting a stimuli-responsive polymer with a specific functional group to coordinate with the wrinkled structure with a specific metal film. The wrinkled structure has a large surface roughness, and the performance switching range of the smart surface can be enhanced by grafting stimuli-responsive polymers on its surface.

[0064] Wherein, the metal film is Au, Ag, Al, Sn or Ti; the functional group is mercapto or amine; preferably, the metal film is Au, and the functional group is mercapto.

[0065] Next, in this application, the preparation of a stimuli-responsive polymer with a thiol-terminated polymer and a wr...

Embodiment 1

[0088] This embodiment provides a stimuli-responsive polymer grafted wrinkled smart surface (PDEAEMA-Au / PS wrinkled surface), which has switchable surface wettability, and its preparation method includes:

[0089] S101. Prepare a stimuli-responsive polymer with stimuli responsiveness.

[0090] Deoxygenate the reaction system first, add 5.91g of monomer (DEAEMA), 0.013g of initiator (AIBN) and 0.089g of chain transfer agent (CPADB) into 30mL of tetrahydrofuran, block oxygen at 70°C and stir for 6h.

[0091] After the polymerization reaction was completed, the reaction solution was precipitated in 250 mL of n-hexane, and then the precipitate was filtered out and purified in vacuum. The crude product was 3.12 g of a polymer with a dithioester end group.

[0092] Then, 3.12 g of the crude product, 0.494 g of hexylamine and 8.30 mg of dithiothreitol (DTT) were added into 30 mL of dichloromethane, and the reaction was stirred for 12 h at room temperature with oxygen isolated. Afte...

Embodiment 2

[0100] This example provides a stimuli-responsive polymer grafted wrinkled smart surface (PDEAEMA-Au / PS wrinkled surface), the preparation method of which is basically the same as that of Example 1, the difference is that in step S102 of this example, in PS The sputtering time of the Au thin film on the surface of the heat-shrinkable sheet was changed to 50s. Under this condition, the thickness of the Au film was about 5.5nm; correspondingly, the obtained wrinkled surface was as follows image 3 As shown, the wrinkle period is about 130 nm.

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Abstract

The invention discloses a stimuli-responsive polymer grafted wrinkled intelligent surface, and a preparation method and an application thereof, and relates to the technical field of intelligent surfaces. The preparation method comprises the following step: grafting a stimuli-responsive polymer onto the surface of a sample with a wrinkle structure, wherein the sample with the wrinkle structure is obtained by heating and thermally shrinking a thermal shrinkage sheet with the surface deposited with a metal film; and the stimuli-responsive polymer has a functional group capable of being grafted with the metal film. According to the invention, the stimuli-responsive polymer can be conveniently grafted onto the surface of the sample with the wrinkle structure, so the preparation method is simple. The wrinkled intelligent surface obtained by using the preparation method provided by the invention has switchable wettability, and can realize directional transmission of acid-base droplets. The stimuli-responsive polymer grafted wrinkled intelligent surface provided by the invention can be extensively applied to the fields of micro-fluidic control, biological medicines, separation engineeringand the like, and has wide application prospect.

Description

technical field [0001] The invention relates to the technical field of smart surfaces, in particular to a stimuli-responsive polymer grafted wrinkled smart surface and its preparation method and application. Background technique [0002] Smart surfaces refer to a class of surfaces that behave "intelligently" in response to external stimuli. Its appearance caters to people's needs for intelligent materials, arouses widespread interest in academia and industry, and is one of the hotspots in functional materials research at this stage. The stimuli of the external environment mainly include physical stimuli (such as heat, light, electricity, magnetism, force, etc.), chemical stimuli (such as pH, redox agents, gases, etc.) and biochemical stimuli (such as antigens, enzyme proteins, and glucose, etc.). The response behavior triggered by external stimuli usually manifests as drastic changes in the macroscopic properties of the surface, including wettability, permeability, adhesion...

Claims

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Application Information

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IPC IPC(8): C08J7/12C08J7/06C08L25/06
CPCC08J7/12C08J7/06C08J2325/06C08J2433/14C08J2433/24
Inventor 朱世平张浩然张祺朱贺
Owner THE CHINESE UNIV OF HONG KONG SHENZHEN
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