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Silsesquioxane surface-modified polymer substrate material and preparation method thereof

A silsesquioxane and surface modification technology, which is applied in the field of silsesquioxane surface-modified polymer base materials and their preparation, can solve the problem of destroying the mechanical strength of film base materials, restricting the application in the optical field, reducing PC light-transmitting board and other issues, to achieve the effect of improving appearance, low requirements, and improving surface performance

Active Publication Date: 2016-06-15
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these methods all have obvious disadvantages: the method of plasma treatment will destroy the mechanical strength of thin-film substrate materials, the method of chemical surface grafting modification uses a large amount of toxic solvents to cause environmental pollution, and the coating layer obtained by coating method The thickness is too thick, and the coating layer is easy to peel off due to factors such as different expansion coefficients and constant friction during use
Using the self-polymerization of dopamine for surface treatment can improve the interface properties to a certain extent, but with the progress of the polymerization reaction of dopamine, the surface of the material will appear dark black, which seriously affects the appearance of the product and limits its application in some fields, such as It will seriously reduce the light transmittance of the PC board, which restricts the application in the optical field

Method used

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  • Silsesquioxane surface-modified polymer substrate material and preparation method thereof
  • Silsesquioxane surface-modified polymer substrate material and preparation method thereof
  • Silsesquioxane surface-modified polymer substrate material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0028] Example 1: A polyethylene (PE) film (14 μm in thickness) was ultrasonically cleaned with acetone and ethanol three times, each time for 30 minutes, and dried at 50°C. Soak the pretreated polyethylene (PE) film in 1.5mg / ml, 120ml tris buffer solution and anhydrous methanol solution with a volume ratio of 1:1, in which the tris buffer solution The concentration is 10mM, pH=8.5, octaaminosilsesquioxane (POSS-NH 2 x=8, n=2) and the mass of dopamine are 4:1, 3:1, 2:1, 1:1, 1:2, 1:3, 1:4, and the soaking time is 15h. After the reaction was completed, it was washed three times with deionized water and dried at 50°C.

Embodiment 2

[0029] Example 2: Cut the polytetrafluoroethylene membrane (PVDF) into long strips with a size of 1cm*3cm, ultrasonically clean it with absolute ethanol three times, 20min each time, and dry it in vacuum. Soak the finished polytetrafluoroethylene membrane in 3.0mg / ml, 120ml tris buffer solution and anhydrous methanol volume ratio are in the solution of 3:1, wherein tris buffer solution concentration is 15mM, pH=9.0, octaaminosilsesquioxane (POSS-NH 2 The mass of x=8, n=2) is 0.24g, the content of dopamine is 0.12g, and the soaking time is 48h. After the reaction was completed, it was washed three times with deionized water, and dried under vacuum at 50°C.

Embodiment 3

[0030] Example 3: Cut the polycarbonate plate (PC) into a size of 4cm*3cm, ultrasonically clean it with absolute ethanol three times, 20min each time, and dry it. Soak the treated polycarbonate plate (PC) in 2.0mg / ml, 120ml tris buffer solution and anhydrous methanol solution with a volume ratio of 4:1, in which tris buffer The concentration is 5mM, pH=8.5, octaaminosilsesquioxane (POSS-NH 2 The mass of x=8, n=2) is 0.10g, the content of dopamine is 0.10g, and the soaking time is 24h. After the reaction was completed, it was washed three times with deionized water, and dried under vacuum at 30°C.

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Abstract

The invention discloses a silsesquioxane surface-modified polymer substrate material and its preparation method. According to the substrate material, on the surface of a polymer substrate, amino group or mercapto group of silsesquioxane and quinone group generated by auto-polymerization of dopamine undergo a Michael addition reaction to form a chemical bond such that silsesquioxane is firmly grafted on the surface of the polymer substrate material so as to achieve the effect of improving polarity of the substrate. According to the invention, strength of the substrate is not damaged, thickness of the substrate is not obviously increased, the modified layer is ultrathin, and the modification is monomolecular layer interfacial modification and helps improve surface performance of the material. Surface energy of the material is raised, surface polarity is enhanced, the substrate with low surface energy has good hydrophily, discoloration degree is obviously reduced, and appearance of the material is improved. In addition, the method has mild reaction condition, can be implemented at room temperature and can be suitable for base materials which are not resistant to high temperature.

Description

technical field [0001] The invention relates to a silsesquioxane surface-modified polymer substrate material and a preparation method thereof. Background technique [0002] The purpose of improving material properties can be achieved by rationally adjusting the surface structure and composition. How to improve the surface energy of polymers using a simple, convenient and widely applicable method needs more exploration. For example, polyolefin (PE, PP, etc.) commercial separators for lithium batteries have low surface energy and poor affinity for electrolytes, which leads to the inability to fully demonstrate the excellent electrochemical properties of lithium batteries (Arora, P.; Zhang, Z.M.BatterySeparators. Chem.Rev.2004,104,4419?4462.); The hydrophilic property of oil-water separation membrane is poor, and the efficiency of oil-water separation is relatively low, can not effectively alleviate water pollution problem (Mussel-inspiredmodificationofpolymermembraneforultrah...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/16C08J7/02C08L23/06C08L27/18C08L69/00C08L23/12
CPCC08J7/02C08J7/16C08J2323/06C08J2323/12C08J2327/18C08J2369/00
Inventor 施利毅王竹仪池明明袁帅陈文举金蕊李锐
Owner SHANGHAI UNIV
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