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A modified method for preparing highly hydrophilic coatings by dopamine-induced sol-gel method

A sol-gel method and dopamine technology, which is applied in the field of highly hydrophilic modification of solid surfaces, can solve problems such as cumbersome process, lack of universal applicability, and inconspicuous effect of hydrophilic modification, and achieve a wide range of applications , good industrial application prospects, simple and effective modification method

Active Publication Date: 2016-08-24
HARBIN INST OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing hydrophilization modification method does not have universal applicability and the process is cumbersome, and the effect of hydrophilization modification is not obvious, so as to provide a simple and effective method suitable for inorganic or polymer materials. The method of surface high hydrophilic modification

Method used

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  • A modified method for preparing highly hydrophilic coatings by dopamine-induced sol-gel method
  • A modified method for preparing highly hydrophilic coatings by dopamine-induced sol-gel method
  • A modified method for preparing highly hydrophilic coatings by dopamine-induced sol-gel method

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specific Embodiment approach 1

[0025] Specific embodiment one: the modified method of preparing highly hydrophilic coating by dopamine-induced sol-gel method in this embodiment is implemented according to the following steps:

[0026] 1. Dissolve dopamine in an alkaline aqueous solution with a pH of 8.5 to 11.5. After the dopamine is completely dissolved, a dopamine solution is obtained, and then inject an ethanol solution containing tetraethyl orthosilicate (TEOS) into the dopamine solution to form a homogeneous impregnating solution;

[0027] 2. Immerse the solid material to be modified into the impregnation solution obtained in step 1, let it stand for impregnation treatment at room temperature, then take out the solid material and wash it with absolute ethanol, and finally rinse it with deionized water to complete the high affinity of the solid material Hydration modification;

[0028] Wherein the mass percentage of dopamine in the impregnating solution described in step 1 is 0.1% to 1%, the mass perce...

specific Embodiment approach 2

[0029] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the mass percentage of ethyl orthosilicate in the impregnating solution described in Step 1 is 0.3%-0.8%. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0030] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the mass percentage of dopamine in the dipping solution described in step 1 is 0.15%-0.3%. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

A modification method for preparing a highly hydrophilic coating by a dopamine-induced sol-gel method. The invention relates to a modification method for a solid surface with a high hydrophilicity. Applicability and cumbersome process, and the effect of hydrophilic modification is not obvious. Modification method: 1. Dissolve dopamine in alkaline aqueous solution, add ethanol solution containing tetraethyl orthosilicate to prepare impregnation solution; 2. Immerse the solid material to be modified in the impregnation solution, and use Rinse with water ethanol and deionized water to complete the highly hydrophilic modification of solid materials. The dopamine-induced sol-gel method modification method of the present invention is simple and effective, can endow the object surface with high hydrophilicity at one time, is suitable for inorganic and organic polymer materials, has a wide range of applications, and the contact angle of the modified glass surface is reduced to 12°~20°, the contact angle of the polymer film is 15°~26°, and the modification effect is good.

Description

technical field [0001] The invention relates to a modification method for high hydrophilicity of solid surface. Background technique [0002] In modern materials science and technology, surface modification is a very important technology. Among them, the hydrophilic modification of the surface of objects has a very broad application prospect, such as in the fields of glass self-cleaning and polymer membrane anti-pollution. The hydrophilization treatment of the glass surface can give the glass self-cleaning effect, so that the glass can no longer be cleaned by the traditional manual scrubbing method under the scouring of natural rainwater; while the hydrophilization treatment of the surface of the polymer film can It will reduce the adsorption of protein and other pollutants on the membrane surface, improve the pollution resistance of the membrane surface, reduce the number of membrane flushing, thereby reducing the operation and maintenance cost of the membrane and improvin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/28
Inventor 邵路王振兴丁善刚
Owner HARBIN INST OF TECH
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