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Method for dynamically and invertibly regulating solid material surface wettability

A solid material and wettability technology, which is applied in the field of dynamic and reversible control of the surface wettability of solid materials, can solve the problems that the range of surface wettability changes is not too large, the material surface properties have special requirements, and the process is complicated. Achieve the effect of good surface wettability controllability, convenient operation and simple process

Inactive Publication Date: 2009-06-24
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods can adjust the surface wettability, but at the same time, there are disadvantages such as complicated process, difficult operation, or special requirements for the surface properties of the material, and the range of the obtained surface wettability is not too large.

Method used

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  • Method for dynamically and invertibly regulating solid material surface wettability
  • Method for dynamically and invertibly regulating solid material surface wettability
  • Method for dynamically and invertibly regulating solid material surface wettability

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Example 1: The surface-charged Si sheet after treatment is assembled on the surface according to the method of literature (G.Decher, J.B.Schlenoff, Multilayer Thin Film--Sequential Assembly of NanocompositeMaterials, Weinheim: Wiley-VCH, 2003.) Membrane, the outermost layer of multilayer membrane is polycationic PDDA; put it in 0.00001mol / L C 7 f 15 After exchanging anions in the COONa aqueous solution for 60 hours, take it out, wash and dry it to obtain a surface with a contact angle of about 85°.

Embodiment 2

[0037] Example 2: The treated Si sheet with charged surface is assembled on the surface according to the method of literature (G.Decher, J.B.Schlenoff, Multilayer Thin Film--Sequential Assembly of NanocompositeMaterials, Weinheim: Wiley-VCH, 2003.) Membrane, the outermost layer of the multilayer membrane is polycationic PDDA, after taking it out, place it in 0.001mol / L C 7 f 15 After exchanging the anions in the COONa aqueous solution for 30 hours, take it out, wash and dry it to obtain a surface with a contact angle of about 85°.

Embodiment 3

[0038] Embodiment 3: The Si sheet with charged surface after treatment is assembled on the surface with polyelectrolyte multilayer according to the method of literature (G.Decher, J.B.Schlenoff, Multilayer Thin Film--Sequential Assembly of NanocompositeMaterials, Weinheim: Wiley-VCH, 2003.) Membrane, the outermost layer of the multilayer membrane is polycationic PDDA, after taking it out, place it in 0.01mol / L C 7 f 15 After exchanging the anions in the COONa aqueous solution for 20 hours, take it out, wash and dry it to obtain a surface with a contact angle of about 85°.

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Abstract

The invention relates to a method for dynamic reversible regulation and control of surface wettability of solid materials. A polycation substance or a polyanion substance is kept on the outmost layer of a solid surface by layers of electrostatic assembly, then the obtained solid material is immersed in a series of electrolyte aqueous solutions containing anions or cations with different hydration energy, the surface wettability of the material can change accordingly in company with various counter ions exchanged on the surface after the corresponding counter ions are exchanged, thus being capable of preparing a series of solid materials with surface wettability changing from super-hydrophilicity to super-hydrophobicity. The method for dynamic reversible regulation and control of the surface wettability of the solid materials has simple process and convenient operation and shows wide application to the fields such as surface treatment, packaging and sanitary accessories.

Description

technical field [0001] The invention belongs to the technical field of material surface wettability treatment, and relates to a method for dynamically and reversibly regulating the surface wettability of solid materials. technical background [0002] Wetting is one of the widespread phenomena in nature, and it is also closely related to human daily life and industrial production. For example, pesticide spray, mechanical lubrication, friction, washing, mirror anti-fog, printing and dyeing, printing, microfluidics, coating of various coatings, etc., all of these phenomena are closely related to the wetting process. At the same time, dewetting materials also play a pivotal role in the application field, such as mineral flotation, waterproof, anti-fouling, self-cleaning, drag reduction, liquid loss-free transportation and other fields require the formation of non-wettable surfaces. Therefore, if the wettability of the material surface can be changed dynamically, the application...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/46C04B41/52C03C17/28C03C21/00C08J7/12
Inventor 苏朝晖汪黎明昝兴杰乔建强
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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