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Stimuli-responsive polymer grafted wrinkled smart surface and its preparation method and application

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

Active Publication Date: 2022-05-24
THE CHINESE UNIV OF HONG KONG SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 smart surface and its preparation method and application
  • Stimuli-responsive polymer grafted wrinkled smart surface and its preparation method and application
  • Stimuli-responsive polymer grafted wrinkled smart surface and its preparation method and application

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preparation example Construction

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

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

[0063] In the present application, the stimuli-responsive polymer is grafted onto the pleated structure by selecting a stimuli-responsive polymer having a specific functional group and a pleated structure having a specific metal film for coordination. The wrinkled structure has a large surface roughness, and the performance switching amplitude of the smart surface can be enhanced by grafting stimulus-responsive polymers on its surface.

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

[0065] Next, in the present application, the preparation of a stimuli-responsive polymer h...

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 the preparation method includes:

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

[0090] The reaction system was first deoxygenated, and 5.91 g of monomer (DEAEMA), 0.013 g of initiator (AIBN) and 0.089 g of chain transfer agent (CPADB) were added to 30 mL of tetrahydrofuran, and oxygen was isolated at 70 °C and the reaction was stirred for 6 h.

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

[0092] Then, 3.12 g of crude product, 0.494 g of hexylamine and 8.30 mg of dithiothreitol (DTT) were added to 30 mL of dichloromethane, oxygen was isolated at room tempe...

Embodiment 2

[0100] This embodiment provides a stimuli-responsive polymer-grafted wrinkled smart surface (PDEAEMA-Au / PS wrinkled surface). The sputtering time of the Au 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 smart surface, a preparation method and application thereof, and relates to the technical field of smart surfaces. The preparation method includes: grafting a stimuli-responsive polymer onto the surface of a sample with a wrinkled structure; wherein, the sample with a wrinkled structure is obtained by heating and shrinking a heat-shrinkable sheet with a metal film deposited on the surface, and the stimuli-responsive polymer It has functional groups that can be grafted with metal films. This application can conveniently graft the stimuli-responsive polymer to the surface of the sample with wrinkled structure, and the preparation method is simple. The resulting wrinkled smart surface exhibits switchable wettability and enables directional transport of acidic and alkaline droplets. The stimuli-responsive polymer-grafted wrinkled smart surface can be widely used in many fields such as microfluidics, biomedicine, and separation engineering, and has broad application prospects.

Description

technical field [0001] The invention relates to the technical field of smart surfaces, in particular, to a wrinkled smart surface grafted with stimuli-responsive polymers and a preparation method and application thereof. Background technique [0002] A smart surface refers to a class of surfaces that behave "smartly" in response to external stimuli. Its appearance caters to people's needs for material intelligence, arousing extensive interest in academia and industry, and is one of the hotspots of 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 behaviors triggered by external stimuli usually manifest as dramatic changes in the macroscopic properties of the surface, including wettability, permeability,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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