High elastic and high permeable antifouling polyurethane membrane and preparation method and application thereof

A polyurethane film, high-permeability technology, used in polyurea/polyurethane coatings, antifouling/underwater coatings, and biocide-containing paints, etc., which can solve the problem of damage to the continuity of the surface functional liquid film and difficult elastic functional modification. , affecting adhesion and transparency, etc., to achieve excellent low-adhesion and anti-fouling performance, smooth feel and style, and significant anti-adhesion effects.

Inactive Publication Date: 2019-11-08
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Surfaces composed of these elastic substrates are only hydrophobic and have poor transparency
For liquid film materials, material stretching will damage the continuity of the surface functional liquid film, and a slight stretch of 10% will seriously affect the adhesion and transparency.
Because PTFE material is insoluble and infusible, it is difficult to modify the elastic function, and the high viscosity after melting even makes it difficult to make PTFE film

Method used

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  • High elastic and high permeable antifouling polyurethane membrane and preparation method and application thereof
  • High elastic and high permeable antifouling polyurethane membrane and preparation method and application thereof
  • High elastic and high permeable antifouling polyurethane membrane and preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0043] The preparation method of the highly elastic and highly transparent antifouling polyurethane film comprises the following steps:

[0044]Add the soft segment monomer, hydrophilic monomer and cross-linking monomer into the four-necked flask, mix well, add the hard segment monomer under the condition of stirring, then add the catalyst dibutyltin dilaurate, and then lower the temperature of the reaction system to Rise to 80 ° C, and react under these conditions for 2h, then add a single hydroxyalkyl organic fluorine, continue to react for 2h. After the reaction is completed, the temperature of the system is lowered to 40°C, and triethylamine is added to neutralize the prepolymer. After neutralization, add water to disperse and emulsify the prepolymer. After the prepolymer is uniformly dispersed and emulsified, add an aqueous solution of a small molecule chain extender for chain extension, and obtain a polyurethane aqueous dispersion with a solid content of 30%; then pour ...

Embodiment 1

[0045] The Fourier transform infrared spectrogram of the polyurethane material prepared in embodiment 1 is as follows figure 1 shown, from figure 1 As can be seen in the figure, the isophorone diisocyanate raw material isocyanate is exhausted, and the expected polycondensation reaction is carried out completely, and all the characteristic peaks corresponding to the expected product structure can be seen from the figure.

[0046] All the characteristic peaks corresponding to the expected product structure can also be seen in the Fourier transform infrared spectra of the polyurethane materials prepared in Examples 2-5.

[0047] The film of above-mentioned each embodiment all can reach technical index film colorless and transparent (transparency can reach more than 95%), pulling The tensile stress is high (≥25MPa), and the hardness is moderate (~80HA), which will not be described here.

Embodiment 4

[0051] The polyurethane film prepared in embodiment 4 has an ultraviolet transmittance of 98% at 500nm visible light wavelength, and the roughness of the film is only 3 to 4nm; the polyurethane film prepared in embodiment 5 has an ultraviolet transmittance of 98% at 500nm visible light wavelength, And the roughness of the film is only 3-4nm;

[0052] (2) Mechanical tensile properties of polyurethane film

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Abstract

The invention belongs to the field of polymer membrane materials, and discloses a high elastic and high permeable antifouling polyurethane membrane and a preparation method and application thereof. Raw materials of the high elastic and high permeable antifouling polyurethane membrane are prepared from the following effective components in percentage by mass: 30-40% of a hard segment monomer, 40-50% of a soft segment monomer, 3-6% of a hydrophilic monomer, 0-3% of a cross-linked monomer, 0%-5% of a small molecule chain extender, and 10-15% of a low surface energy compound. According to the highelastic and high permeable antifouling polyurethane membrane, through polycondensation reaction, a chemical and physical double cross-linked antifouling polyurethane is synthesized; the membrane shows excellent low adhesion and antifouling properties; water, diiodomethane, cetane and other liquids with different surface tension do not adhere to the membrane at all, and slide off the membrane without leaving traces; and when the membrane is in a tensile state (the elongation is less than or equal to 1800%), the liquids can still slide off the membrane without leaving the traces, and it is shown that the membrane can simultaneously achieve the coexistence of low adhesion and extensibility.

Description

technical field [0001] The invention belongs to the fields of novel polymer functional materials, high-performance polymer structural materials and polymer film materials, and in particular relates to a high-elasticity and high-permeability antifouling polyurethane film and its preparation method and application. Background technique [0002] Revolutionary advances in various technological fields suggest a foreseeable future of treating human diseases or enhancing capabilities by incorporating synthetic materials and devices into our bodies, including synthetic skin, electronic muscles, wearable devices, and more. Synthetic materials support human development in many aspects such as device progress, and will also be the basis for human beings to realize new ideas. In the development of new materials, different from existing hard materials and devices, tensile properties will become emerging and necessary material properties. However, as one of the important properties of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08J5/18C08G18/66C08G18/48C08G18/34C08G18/32C08G18/38C09D175/08C09D5/16
CPCC08J5/18C08G18/6677C08G18/6692C08G18/4854C08G18/3206C08G18/348C08G18/2885C09D175/08C09D5/1662C08J2375/08C08G18/755C08G18/246C08G18/10C08G18/12C08G18/242
Inventor 吴旭刘敏换王正平徐秀彬于丹凤毛桃嫣
Owner GUANGZHOU UNIVERSITY
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