Method for treating polymer film

Abstract

The processing method of the polymer film comprises the following steps: providing the polymer film, wherein the polymer film comprises a dynamic covalent bond; depositing and forming the polymer film on a substrate; and spraying methanol between the polymer film and the substrate to strip the polymer film from the substrate, wherein the concentration of the methanol is 5%-15%. According to the method, the polymer film can be completely stripped from the substrate, the characteristics of the polymer film are not damaged, the polymer film can keep excellent mechanical properties and reversible material properties, and meanwhile, the substrate is not damaged; and the treatment method is simple and easy to operate, low in cost and suitable for multiple fields.

Description

Technical Field

[0001] The invention relates to the technical field of polymers, and in particular to a method for processing a polymer film. Background Art

[0002] Dynamic covalent bonds can be reversibly broken and formed under certain conditions, combining the advantages of the reversibility of supramolecular non-covalent bonds and the stability of covalent bonds, which makes them widely used, especially in polymer materials. For example, polymer films prepared based on polymer particles are used as substrate materials for flexible displays, materials for biomedical devices, etc., with excellent mechanical properties and reversible material properties. However, due to the good adhesion of such polymer films, it is usually difficult to peel off from the substrate, which limits its scope of application.

[0003] Therefore, it is necessary to provide a method for processing a polymer film to overcome the above defects. Summary of the invention

[0004] The object of the present invention is to provide a method for treating a polymer film, which can effectively and completely peel the polymer film from a substrate without affecting the properties of the polymer film and the substrate.

[0005] To achieve the above object, the method for treating a polymer film of the present invention comprises the following steps:

[0006] providing a polymer film, the polymer film comprising dynamic covalent bonds;

[0007] Depositing the polymer film on a substrate; and

[0008] Methanol is sprayed between the polymer film and the substrate to peel the polymer film from the substrate, wherein the concentration of the methanol is 5% to 15%.

[0009] Compared with the prior art, the present invention provides a polymer film containing dynamic covalent bonds and deposited on a substrate. The polymer film is peeled off from the substrate by spraying methanol between the polymer film and the substrate. Moreover, the use of methanol at a specific concentration can completely peel the polymer film from the substrate without destroying its properties. The polymer film can maintain excellent mechanical properties and reversible material properties, and at the same time, will not cause damage to the substrate. The processing method of the present invention is simple and easy to operate, low in cost, and applicable to multiple fields.

[0010] Preferably, after spraying the methanol, the method further comprises standing for 10 to 30 minutes.

[0011] Preferably, providing the polymer film comprises: preparing polymer particles using acrylic acid and styrene as raw materials, and obtaining the polymer film by centrifugal precipitation and purification.

[0012] Preferably, providing the polymer film comprises: using pure acrylic acid as a raw material, preparing polymer particles by free radical polymerization, and obtaining the polymer film by centrifugal precipitation.

[0013] Preferably, the substrate is a silicon wafer or a glass wafer.

[0014] Preferably, the method further comprises spraying the methanol on the surface of the polymer film. DETAILED DESCRIPTION

[0015] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with some embodiments. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0016] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0017] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0018] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0019] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0020] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0021] The following is a further description of the polymer film treatment method of the present invention in conjunction with the examples, but the present invention is not limited thereby. The method of the present invention is intended to provide an improved polymer film treatment method, which can effectively and completely peel the polymer film from the substrate without affecting the properties of the polymer film and the substrate.

[0022] In one embodiment of the method for treating a polymer film of the present invention, the following steps are included:

[0023] providing a polymer film, the polymer film comprising dynamic covalent bonds;

[0024] Depositing the polymer film on a substrate; and

[0025] Methanol is sprayed between the polymer film and the substrate to peel the polymer film from the substrate, wherein the concentration of the methanol is 5% to 15%.

[0026] The present invention provides a polymer film containing dynamic covalent bonds, which is deposited on a substrate. The polymer film is peeled off from the substrate by spraying methanol between the polymer film and the substrate. The use of methanol at a specific concentration can completely peel the polymer film from the substrate without destroying its properties. The polymer film can maintain excellent mechanical properties and reversible material properties, and at the same time, will not cause damage to the substrate. The processing method of the present invention is simple and easy to operate, low in cost, and has important significance for promoting and applying the polymer film in various fields.

[0027] Specifically, as a preferred embodiment, acrylic acid and styrene are used as raw materials to prepare polymer particles with dynamic covalent bonds, and then a polymer film is obtained by centrifugal precipitation and purification, and then the polymer film is deposited on a silicon wafer. At room temperature, methanol with a concentration of 5%-15%, such as 8%, is sprayed on the surface of the polymer film and the area between the polymer film and the substrate, so that the methanol molecules react with the reactive functional groups in the polymer film and loosen. Preferably, after standing for 10-30 minutes, such as 20 minutes after spraying, the polymer film can be completely peeled off from the silicon wafer and maintain the original mechanical properties and reversible material properties.

[0028] As another preferred embodiment, pure acrylic acid is used as a raw material, polymer particles are obtained by free radical polymerization, and a polymer film is obtained after precipitation, which is deposited on a glass sheet. At room temperature, 10% methanol is sprayed on the polymer film, and the polymer film is left standing for 30 minutes. The polymer film can be completely peeled off from the glass sheet, and no fracture occurs during the peeling process, maintaining the original mechanical properties and reversible material properties.

[0029] As another preferred embodiment, pure acrylic acid is used as a raw material, polymer particles are obtained by free radical polymerization, and a polymer film is obtained after precipitation, which is deposited on a glass sheet. At room temperature, 15% methanol is sprayed on the polymer film, and the polymer film is left standing for 10 minutes. The polymer film can be completely peeled off from the glass sheet, and no fracture occurs during the peeling process, maintaining the original mechanical properties and reversible material properties.

[0030] As another preferred embodiment, polymer particles with dynamic covalent bonds are prepared using acrylic acid and styrene as raw materials, and then a polymer film is obtained by centrifugal precipitation and purification, and then the polymer film is deposited on a silicon wafer. At room temperature, 5% methanol is sprayed on the polymer film, and the polymer film is left standing for 30 minutes. The polymer film can be completely peeled off from the silicon wafer, and no fracture occurs during the peeling process, maintaining the original mechanical properties and reversible material properties.

[0031] It can be seen that the present invention provides a polymer film containing dynamic covalent bonds and deposited on a substrate. The polymer film is peeled off from the substrate by spraying methanol between the polymer film and the substrate. Moreover, the use of a specific concentration of methanol can completely peel the polymer film from the substrate without destroying its properties. The polymer film can maintain excellent mechanical properties and reversible material properties, and at the same time, will not cause damage to the substrate. The processing method of the present invention is simple and easy to operate, low in cost, and has important significance for promoting and applying the polymer film in various fields.

[0032] The above disclosure is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A method for treating a polymer film, characterized in that: The following steps are involved: providing a polymer film, the polymer film comprising dynamic covalent bonds; Depositing the polymer film on a substrate; and Methanol is sprayed between the polymer film and the substrate to peel the polymer film from the substrate, wherein the concentration of the methanol is 5% to 15%.

2. The method for treating a polymer film according to claim 1, characterized in that: After spraying the methanol, the method further includes standing for 10 to 30 minutes.

3. The method for treating a polymer film according to claim 1, wherein: Providing the polymer film comprises: preparing polymer particles using acrylic acid and styrene as raw materials, and obtaining the polymer film through centrifugal precipitation and purification.

4. The method for treating a polymer film according to claim 1, wherein: Providing the polymer film comprises: using pure acrylic acid as a raw material, preparing polymer particles through free radical polymerization, and obtaining the polymer film through centrifugal precipitation.

5. The method for treating a polymer film according to claim 1, wherein: The substrate is a silicon wafer or a glass wafer.

6. The method for treating a polymer film according to claim 1, wherein: The method also includes spraying the methanol on the surface of the polymer film.