Method for synergistically regulating wettability by utilizing shape memory polymer and temperature response molecules

A memory polymer, temperature-responsive technology, which is used in the field of using shape memory polymers and temperature-responsive molecules to coordinately adjust wettability, and can solve problems such as difficult to control intermediate states and inability to perform good regulation.

Active Publication Date: 2017-12-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the deepening of research, the wettability regulation of the same surface is constantly updated, but the research often only gives the transition from superhydrophilic to superhydrophobic, and there are few studies on the intermediate state, even if some regulation can be obtained. The intermediate state is also in an intermediate state that is difficult to control and cannot be well regulated

Method used

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  • Method for synergistically regulating wettability by utilizing shape memory polymer and temperature response molecules
  • Method for synergistically regulating wettability by utilizing shape memory polymer and temperature response molecules
  • Method for synergistically regulating wettability by utilizing shape memory polymer and temperature response molecules

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specific Embodiment approach 1

[0024] Specific implementation mode 1: A method for synergistically adjusting wettability by using shape memory polymers and temperature-responsive molecules, the results obtained are shown in the attached Figure 1-8 , the method includes the following steps:

[0025] Step 1: Etching the silicon wafer by photolithography, so that the surface of the silicon wafer presents different arrays. The length and width of the etched silicon wafer array are 10 μm×10 μm, the array spacing is 5 μm-30 μm, and the array height is 10 μm- 30μm;

[0026] Step 2: Use polydimethylsiloxane to shape the silicon wafer, the weight ratio of the prepolymer to the curing agent is 90-150:10, the curing temperature is 65-100°C, and the mold is demoulded after curing to obtain the silicon wafer. The opposite PDMS template of the sheet array;

[0027] Step 3: Use the PDMS template to shape the shape-memory epoxy resin microarray, use epoxy resin and curing agent, and mix the glue according to the weight ...

specific Embodiment approach 2

[0030] Specific embodiment 2: In the method of utilizing shape memory polymers and temperature-responsive molecules to coordinate wettability adjustment described in specific embodiment 1, in step 3, the epoxy resin is epoxy resin E51 or epoxy resin E44, so The curing agent is n-octylamine, dodecylamine, m-xylylenediamine, triethylenetetramine, and phthalimide.

specific Embodiment approach 3

[0031]Specific embodiment three: In the method for synergistically adjusting wettability by using shape memory polymers and temperature-responsive molecules described in specific embodiment one or two, in step four, the silane coupling agent is 3-aminopropylmethoxysilane Or 3 aminopropylethoxysilane.

[0032] The following table shows the xps analysis before the array is overwhelmed, overwhelmed and after recovery:

[0033]

[0034] It can be seen from the above table that the surface chemical substances do not change significantly during the shape change of the sample.

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Abstract

The invention discloses a method for synergistically regulating wettability by utilizing a shape memory polymer and temperature response molecules and relates to a method for realizing wettability regulation on the material surface. The method disclosed by the invention comprises the following steps: (1) etching a silicon chip by using a photoetching method; (2) shaping the silicon chip by utilizing PDMS (Polydimethylsiloxane); (3) shaping a shape memory epoxy resin micro array by utilizing a PDMS template; (4) grafting poly-azoisopropylacrylamide on the surface of the shape memory epoxy resin micro array; and (5) performing surface wettability regulation on the sample obtained in (4). According to the method disclosed by the invention, surface microstructure regulation is combined with surface temperature response molecules, controlled transformation from a super-hydrophilic state to a super-hydrophobic state of the wettability on the same surface by virtue of the synergistic effect of physical regulation and chemical regulation, and the obtained intelligent surface can be applied to the fields of intelligent devices, such as a micro-fluid device, biological detection, located drug release and the like, and the method is a brand new response surface preparation technology.

Description

technical field [0001] The invention relates to a method for controlling wettability on the surface of a material. Background technique [0002] As an important feature of solid surfaces, wettability plays a very important role in our production and life, such as pipeline transportation, anti-fog, controlled release of drugs, machine lubrication, etc. Since different production practices have different requirements for wettability, surfaces with different wettability such as superhydrophilic and superhydrophobic have been continuously researched according to people's needs. In some special fields, different wettability characteristics are required under different conditions, which requires the controllable regulation of wettability on the surface of the material. [0003] As a temperature-responsive molecule, polyaminoisopropylacrylamide can be used to control the wettability of the surface through the stimulation of temperature conditions due to its low LCST. It is used on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/16C08J7/12C08L63/00
CPCC08J7/12C08J7/123C08J7/16C08J2363/00C08J2433/24
Inventor 成中军张东杰刘宇来华刘宇艳
Owner HARBIN INST OF TECH
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