A method for preparing temperature-responsive surfaces based on self-polymerization of dopamine

A temperature-responsive, self-polymerizing technology, applied in the direction of adhesives, etc., can solve the problems of temperature-responsive surface, such as poor stability in use, complicated operation, and limited substrates, and achieve the effects of wide applicability, simple operation, and overcoming complicated operation

Active Publication Date: 2020-03-10
四川大川合颐生物科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies of the prior art, to provide a method for preparing a temperature-responsive surface based on the self-polymerization of dopamine, to overcome the complex operation, limited base material and preparation problems of the existing chemical and physical methods. Insufficient stability of temperature-responsive surface

Method used

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  • A method for preparing temperature-responsive surfaces based on self-polymerization of dopamine
  • A method for preparing temperature-responsive surfaces based on self-polymerization of dopamine
  • A method for preparing temperature-responsive surfaces based on self-polymerization of dopamine

Examples

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Embodiment 1

[0044] In this example, the schematic flow chart for preparing a temperature-responsive surface is as follows figure 1 As shown, the steps are as follows:

[0045] (1) Using the glass capillary as the base material, the glass capillary is ultrasonically cleaned with acetone, ethanol and deionized water in order to remove organic pollutants and solid particles on the surface of the glass capillary to obtain a clean glass capillary, and clean the glass capillary Soak in deionized water for later use.

[0046] (2) Configure Tris buffer solution: add Tris (Tris) into secondary deionized water and stir to form a Tris solution evenly. When the pH value reaches 8.5, Tris buffer solution is obtained.

[0047] Add the PNIPAM nanogel particles into the Tris buffer at a temperature of 25°C according to the mass ratio of the PNIPAM nanogel particles to the Tris buffer at a ratio of 1:200, and ultrasonically disperse the nanogel particles evenly at a power of 40W for 20min. Obtain the n...

Embodiment 2

[0058] In this example, the schematic flow chart for preparing a temperature-responsive surface is as follows figure 1 As shown, the steps are as follows:

[0059] (1) Using a glass plate as the base material, the base material is ultrasonically cleaned with acetone, ethanol and deionized water in order to remove solid particles on the surface of the base material to obtain a clean base material, which is soaked in deionized water ready for use.

[0060] (2) Configure Tris buffer: Add Tris to secondary deionized water and stir to form a Tris solution. The concentration of the Tris solution is 10mmol / L. Slowly add dilute hydrochloric acid to the Tris solution to adjust its pH to 7 to obtain Tris buffer. liquid.

[0061] Add the PNIPAM nanogel particles into the Tris buffer at a temperature of 20°C according to the mass ratio of the PNIPAM nanogel particles to the Tris buffer at a ratio of 1:100, and ultrasonically disperse the nanogel particles evenly at a power of 50W for 10...

Embodiment 3

[0065] In this example, the schematic flow chart for preparing a temperature-responsive surface is as follows figure 1 As shown, the steps are as follows:

[0066] (1) Using a polydimethylsiloxane flat plate as the base material, the base material is ultrasonically cleaned with deionized water to remove solid particles on the surface of the base material to obtain a clean base material, and soak the cleaned base material in deionized water. ions ready for use.

[0067] (2) Configure Tris buffer: Add Tris to secondary deionized water and stir to form a Tris solution. The concentration of the Tris solution is 20mmol / L. Slowly add dilute hydrochloric acid to the Tris solution to adjust its pH to 10 to obtain Tris buffer. liquid.

[0068] The PNIPAM nanogel particles are added into the Tris buffer at a temperature of 23°C at a ratio of 1:500 according to the mass ratio of the PNIPAM nanogel particles to the Tris buffer, and the nanogel particles are evenly dispersed at a power o...

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Abstract

The invention provides a method for preparing a temperature responsive surface based on an auto-polymerization reaction of dopamine. The method comprises the following steps: uniformly dispersing poly(N-isopropylacrylamide) nanogel particles in a Tris buffer solution with the pH value of 7-10 at the temperature of 4-25 DEG C so as to obtain nanogel particle dispersion, and dissolving dopamine hydrochloride in the nanogel particle dispersion so as to obtain a modified solution; and (2) enabling a to-be-modified part of a clean base material to be positioned in the modified solution atmosphere, reacting under aerobic conditions at the temperature of 20-25 DEG C for at least 10 hours, cleaning the previous treated base material with deionized water, drying the cleaned base material at the temperature of 20-50 DEG C so as to remove the moisture on the surface of the base material, thereby completing preparation of the temperature responsive surface. The method has the stability of a chemical effect and the simplicity of a physical effect, is not limited by the base material and is wide in applicability.

Description

technical field [0001] The invention belongs to the field of making temperature-responsive surfaces, in particular to a method for preparing temperature-responsive surfaces based on dopamine self-polymerization. Background technique [0002] A temperature-responsive surface refers to a surface that reversibly changes the physical and chemical properties of the material surface, such as wetting characteristics, friction characteristics, mechanical characteristics, optical characteristics, and reaction characteristics, by responding to changes in the external environment temperature. Among them, poly(N-isopropylacrylamide) (Poly(N-isopropylacrylamide), PNIPAM) is the most common and relatively easy-to-prepare temperature-responsive polymer material. Main material. PNIPAM is modified on the material surface, and the hydrophilic and hydrophobic wetting state of the surface can be reversibly switched by temperature stimulation. When the temperature is lower than the lower criti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/06C09J179/04
CPCC08G73/0672C09J179/04
Inventor 张磊褚良银刘壮谢锐巨晓洁汪伟刘露月杨超
Owner 四川大川合颐生物科技有限公司
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