Membrane making device for detecting solid content of stock solution

Abstract

The utility model discloses a membrane making device for detecting the solid content of a stock solution, and relates to the technical field of carbon fiber production and detection. The film making device comprises a film making mold, the film making mold comprises a base body, and the base body is provided with at least one sample containing groove used for containing a stock solution; the cover plate is matched with the inner wall of the sample containing groove in shape and can cover the sample containing groove containing the stock solution; the film making device further comprises a pressing structure which is arranged on the cover plate and used for applying pressure to the cover plate. According to the membrane preparation device, batch sample preparation can be achieved, the number of invalid test samples is effectively reduced, the detection efficiency and the accuracy of detection of the solid content of the stock solution are improved, and standardization of detection of the solid content of the carbon fiber precursor stock solution is achieved; and the stability of the quality of the carbon fiber precursor and the stability of the production of a carbon fiber final product production line and the quality of a final product are greatly improved.

Description

Technical Field

[0001] This application relates to the technical field of carbon fiber production and detection, and particularly to a film-making device for detecting the solid content of the stock solution. Background Art

[0002] Carbon fiber is a fiber with high strength and high modulus, with a carbon content of more than 95%, and has excellent properties such as high tensile strength, high tensile modulus, low density, and high temperature resistance. Among them, the carbon fiber precursor stock solution, as the first process in the preparation of carbon fiber, the stability of its quality will directly affect the quality of the carbon fiber precursor and the stability of the production process and quality of the carbon fiber finished product.

[0003] The solid content of the carbon fiber precursor stock solution is an important performance index of the carbon fiber precursor stock solution. At present, the solid content of the carbon fiber precursor stock solution is usually detected by the film pressing and weighing method. This method mainly includes: the tester weighs the test sample onto a square glass, then covers another square glass and applies pressure manually to press the test sample into a film, and then through steps such as water bath film removal and vacuum drying, a dry detection film sample is obtained, and then the solid content of the stock solution is calculated by weighing the mass difference of the test sample before and after.

[0004] However, this film-making method has disadvantages such as inaccurate positioning of the stock solution test sample, invalid test samples caused by sample overflow, and low detection efficiency. Therefore, it is particularly important to develop a high-efficiency and accurate film-making device. Summary of the Invention

[0005] In order to solve the above technical problems, this application provides a film-making device for detecting the solid content of the stock solution, which can realize batch sample preparation and effectively reduce the number of invalid test samples, improve the detection efficiency and the accuracy of the solid content detection of the stock solution, standardize the detection of the solid content of the carbon fiber precursor stock solution, and greatly improve the stability of the quality of the carbon fiber precursor and the stability of the production process and the quality of the carbon fiber final product.

[0006] This application provides a film-making device for detecting the solid content of the stock solution, including a film-making mold.

[0007] The film-making mold includes:

[0008] A base body, on which at least one sample-containing groove is provided for containing the stock solution;

[0009] A cover plate, which is adapted to the inner wall shape of the sample-containing groove and can cover the sample-containing groove filled with the stock solution;

[0010] The film-making device further includes a pressing structure provided on the cover plate for applying pressure to the cover plate.

[0011] In some embodiments of the present application, the cross-section of the sample holding groove gradually decreases along the depth direction of the film-making mold.

[0012] In some embodiments of the present application, the cover plate includes:

[0013] a first supporting portion, wherein the first supporting portion is disposed on the base;

[0014] The sample covering part is connected to the first supporting part, and the sample covering part is adapted to the inner wall shape of the sample holding groove, and can cover the sample holding groove containing the stock solution.

[0015] In some embodiments of the present application, the pressing structure includes:

[0016] a second supporting portion, the second supporting portion being disposed on the first supporting portion;

[0017] A sample pressing part, wherein the sample pressing part is connected to the second supporting part, and the sample pressing part is arranged on the sample covering part, and is used for applying pressure to the sample covering part.

[0018] In some embodiments of the present application, the sample covering portion includes a bottom plate and a side plate connected to the bottom plate, the bottom plate and the side plate enclose a sample pressing cavity, and the sample pressing portion matches the sample pressing cavity.

[0019] In some embodiments of the present application, the pressing structure further includes a hand-held portion, and the hand-held portion is disposed on a side of the second supporting portion away from the sample pressing portion.

[0020] In some embodiments of the present application, when the sample holding groove comprises a plurality of grooves, the bottom walls of the sample holding grooves are located in the same plane.

[0021] In some embodiments of the present application, the film-making device further comprises a water bath demolding mechanism, and the water bath demolding mechanism is used to hold the film-making mold to separate the film sample from the film-making mold.

[0022] In some embodiments of the present application, the water bath demolding mechanism includes a water bath container and an oscillating component, and the oscillating component is used to oscillate the water bath container or the water in the water bath container.

[0023] In some embodiments of the present application, the oscillation component includes one of a mechanical oscillation device, a rotational oscillation device, a magnetic stirring oscillation device, and an ultrasonic oscillation device.

[0024] The technical solution provided by this application may have the following beneficial effects:

[0025] When preparing a detection film sample using the film-forming device of the present application, the sample-containing groove can hold the stock solution. Then, the cover plate is placed over the sample-containing groove with the stock solution, and the pressing structure is further placed on the cover plate to apply pressure to the cover plate. In this way, the overflow of the stock solution test sample can be avoided, facilitating the positioning of the sample. After steps such as water bath demolding and vacuum drying, a dry detection film sample can be obtained. In this way, batch sample preparation can be achieved, and the number of invalid test samples can be effectively reduced, improving the detection efficiency and the accuracy of the stock solution solid content detection, standardizing the detection of the carbon fiber precursor stock solution solid content, and greatly improving the stability of the carbon fiber precursor quality and the stability of the production of the carbon fiber end product production line and the end product quality.

[0026] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present application and used together with the specification to explain the principles of the present application.

[0028] Figure 1 is a top view of a film-forming device shown according to an exemplary embodiment.

[0029] Figure 2 is a left view of a film-forming device shown according to an exemplary embodiment.

[0030] Figure 3 is a schematic structural diagram of a pressing structure shown according to an exemplary embodiment.

[0031] REFERENCE NUMERALS

[0032] 1, film-forming mold; 11, matrix; 111, sample-containing groove; 12, cover plate; 121, first support portion; 122, sample-covering portion; 1221, bottom plate; 1222, side plate; 1223, sample-pressing cavity; 2, pressing structure; 21, second support portion; 22, sample-pressing portion; 23, hand-held portion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other arbitrarily.

[0034] The present application provides a film-forming device for detecting the solid content of stock solution, including a film-forming mold and a pressing structure. The film-forming mold includes a base body and a cover plate. At least one sample-containing groove is provided on the base body; the cover plate is adapted to the inner wall shape of the sample-containing groove, and the pressing structure is arranged on the cover plate. When preparing a test film sample, the sample-containing groove can hold the stock solution, then the cover plate is covered on the sample-containing groove filled with the stock solution, and then the pressing structure is covered on the cover plate to apply pressure to the cover plate. In this way, the overflow of the stock solution test sample can be avoided, which is convenient for positioning the sample. After steps such as water bath demolding and vacuum drying, a completely dry test film sample can be obtained. In this way, batch sample preparation can be realized and the number of invalid test samples can be effectively reduced, improving the detection efficiency and the accuracy of detecting the solid content of the stock solution, standardizing the detection of the solid content of the carbon fiber precursor stock solution, and greatly improving the stability of the quality of the carbon fiber precursor and the stability of the production of the carbon fiber final product line and the quality of the final product.

[0035] Some specific embodiments described below are intended to facilitate the understanding of those skilled in the art of this embodiment, and this embodiment is not limited by some specific embodiments described below.

[0036] As Figures 1 - 3 shown, an exemplary embodiment of the present application provides a film-forming device for detecting the solid content of stock solution, including a film-forming mold 1 and a pressing structure 2. The film-forming mold 1 includes a base body 11 and a cover plate 12. At least one sample-containing groove 111 is provided on the base body 11 for holding the stock solution; the cover plate 12 is adapted to the inner wall shape of the sample-containing groove 111 and can cover the sample-containing groove 111 filled with the stock solution; the pressing structure 2 is arranged on the cover plate 12 for applying pressure to the cover plate 12.

[0037] When preparing a test film sample, the stock solution is added to the sample-containing groove 111, then the cover plate 12 is covered on the sample-containing groove 111 filled with the stock solution, and then the pressing structure 2 is covered on the cover plate 12 to apply pressure to the cover plate 12. In this way, the overflow of the stock solution test sample can be avoided, which is convenient for positioning the sample. After steps such as water bath demolding and vacuum drying, a completely dry test film sample can be obtained.

[0038] Among them, the number of the sample-containing grooves 111 can be set as needed. For the convenience of batch sample preparation, the number of the sample-containing grooves 111 can be set to be multiple. For example, Figure 1 the sample-containing grooves 111 in

[0039] In one embodiment, along the depth direction of the film-forming mold 1, the cross-section of the sample-containing groove 111 gradually decreases.

[0040] In this embodiment, along the depth direction of the sample preparation mold, the cross-section of the sample-containing groove 111 gradually decreases, which can facilitate the detachment of the film sample from the sample preparation mold. Among them, the depth direction can be, for example,Figure 2 The up - down direction in

[0041] In one embodiment, the cover plate 12 includes a first support portion 121 and a sample - covering portion 122. The first support portion 121 is disposed on the base body 11; the sample - covering portion 122 is connected to the first support portion 121, and the sample - covering portion 122 is adapted to the inner wall shape of the sample - containing groove 111 and can cover the sample - containing groove 111 filled with the stock solution.

[0042] In this embodiment, the sample - covering portion 122 is adapted to the inner wall shape of the sample - containing groove 111 and can cover the sample - containing groove 111 filled with the stock solution. The first support portion 121 is disposed on the base body 11, and the base body 11 can support it. Among them, the first support portion 121 can adopt a plate - like structure; the number of the sample - covering portions 122 corresponds one - to - one with the number of the sample - containing grooves 111. For example, Figure 1 if the number of the sample - containing grooves 111 in is set to six, then the number of the sample - covering portions 122 is also set to six. The six sample - covering portions 122 are connected by the first support portion 121, so as to facilitate the overall movement of the cover plate 12 and improve the convenience of operation.

[0043] In one embodiment, the pressing structure 2 includes a second support portion 21 and a sample - pressing portion 22. The second support portion 21 is disposed on the first support portion 121; the sample - pressing portion 22 is connected to the second support portion 21, and the sample - pressing portion 22 is disposed on the sample - covering portion 122 and is used to apply pressure to the sample - covering portion 122.

[0044] In this embodiment, by applying pressure to the sample - covering portion 122 through the sample - pressing portion 22, the problem of many invalid samples caused by human operation differences can be reduced. Among them, the second support portion 21 can adopt a plate - like structure.

[0045] In one embodiment, the sample - covering portion 122 includes a bottom plate 1221 and a side plate 1222 connected to the bottom plate 1221. The bottom plate 1221 and the side plate 1222 enclose a sample - pressing cavity 1223, and the sample - pressing portion 22 is matched with the sample - pressing cavity 1223.

[0046] In this embodiment, by pressing in the sample - pressing cavity 1223 through the sample - pressing portion 22, the pressurization of the sample can be realized. Among them, the sample - pressing portion 22 can be set as a pressing block with a certain weight. The number of the sample - pressing portions 22 corresponds one - to - one with the sample - pressing cavities 1223, the sample - covering portions 122, and the sample - containing grooves 111. For example, Figure 1 if the number of the sample - containing grooves 111 in is set to six, then the number of the sample - pressing portions 22, the sample - pressing cavities 1223, and the sample - covering portions 122 are all set to six. The six sample - pressing portions 22 are connected by one second support portion 21, so as to facilitate the overall movement of the pressing structure 2 and improve the convenience of operation.

[0047] In one embodiment, the pressing structure 2 further includes a handheld portion 23, and the handheld portion 23 is disposed on a side of the second supporting portion 21 away from the sample pressing portion 22.

[0048] In this embodiment, by providing the handheld portion 23 on the pressing structure 2, it is convenient to move the pressing structure 2. Among them, the handheld portion 23 may be a handheld rod or a handle.

[0049] In one embodiment, when the sample holding grooves 111 include a plurality of them, the bottom walls of the respective sample holding grooves 111 are located in the same plane.

[0050] In this embodiment, when the sample holding grooves 111 include a plurality of them, the bottom walls of the respective sample holding grooves 111 being located in the same plane can facilitate sample preparation and reduce the measurement error of the film samples in the same batch.

[0051] In one embodiment, the film forming device further includes a water bath film stripping mechanism (not shown in the figure), and the water bath film stripping mechanism is used to hold the film forming mold 1 to separate the film sample from the film forming mold 1.

[0052] In this embodiment, demineralized water is placed in the water bath film stripping mechanism. The film forming mold 1 is placed in the water bath film stripping mechanism for water bath treatment. By using the characteristic that the demineralized water in the water bath film stripping mechanism is immiscible with the solvent of the stock solution, the solvent can be removed, the demineralized water enters the film forming mold 1, and the film sample is separated from the mold to form a thin film sample.

[0053] In one embodiment, the water bath film stripping mechanism includes a water bath container and an oscillation assembly, and the oscillation assembly is used to oscillate the water bath container or the water in the water bath container.

[0054] In this embodiment, through the oscillation assembly, the water bath can be vibrated to accelerate the removal of the solvent and the monomer.

[0055] In one embodiment, the oscillation assembly includes one of a mechanical oscillation device, a rotary oscillation device, a magnetic stirring oscillation device, and an ultrasonic oscillation device.

[0056] The mechanical oscillation device, the rotary oscillation device, the magnetic stirring oscillation device, and the ultrasonic oscillation device can all achieve a good oscillation effect. In this embodiment, the oscillation assembly may, for example, adopt an ultrasonic vibration device, and the ultrasonic vibration device can perform ultrasonic vibration on the water bath to avoid physical damage to the film sample or the mold.

[0057] An exemplary embodiment of the present application provides a method for preparing a detection film sample by using the film forming mold of the present application and performing a solid content detection on the detection film sample:

[0058] (1) Weigh 0.5 - 1.0 g of the stock solution of the sample to be tested into a weighing bottle by the weight loss method, and record the weight of the weighing bottle as M1 (including the weighing bottle and the test sample stock solution).

[0059] (2) Sequentially add the original samples to be tested in different weighing bottles at the center of the sample-containing groove 111. After adding the samples, weigh the weighing bottles again, and record the weight as M2.

[0060] (3) Cover the sample-containing groove 111 filled with the original liquid with the cover plate 12, and then cover the pressing structure 2 on the cover plate 12. Apply an external pressure to the film-forming mold 1 through the pressing structure 2 to realize the preliminary preparation of the test film sample.

[0061] (4) Immerse the film-forming mold 1 in the water bath film removal mechanism, and use the ultrasonic oscillation device to ultrasonically vibrate the deionized water bath. Since the original liquid and deionized water are immiscible, the solvent in the original liquid is removed, and the deionized water enters the film-forming mold 1, and the film sample is separated from the mold to form a thin film sample.

[0062] (5) Take out the thin film sample from the deionized water and place it on the filter paper. After sucking off the moisture, place it in an oven for drying at 120 °C for 60 min to obtain a completely dry test film sample. Weigh the film sample at this time and record it as M3.

[0063] (6) According to the following formula, calculate the solid content C of the original liquid:

[0064]

[0065] In summary, through the cooperation of the film-forming mold 1, the pressing structure 2 and the water bath film removal mechanism of the present application, the problems of many invalid samples, low detection efficiency and low detection accuracy caused by human operation differences in the preparation process of the test film sample for detecting the solid content of the carbon fiber precursor original liquid are solved. At the same time, the detection of the solid content of the carbon fiber precursor original liquid is standardized, greatly improving the quality stability of the carbon fiber precursor and the production stability of the carbon fiber final product production line and the quality of the final product.

[0066] (22) Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the embodiments disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include known common knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the claims of the present application.

[0067] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A film-forming device for detecting the solid content of the stock solution, characterized in that, including a film-forming mold, the film-forming mold includes: a substrate, on which at least one sample-containing groove is provided for containing the stock solution; a cover plate, the inner wall shape of the cover plate being adapted to the inner wall of the sample-containing groove, and being capable of covering the sample-containing groove filled with the stock solution; the film-forming device further includes a pressing structure provided on the cover plate for applying pressure to the cover plate.

2. The film forming device for detecting the solid content of the stock solution according to claim 1, characterized in that, Along the depth direction of the film-forming mold, the cross-section of the sample-containing groove gradually decreases.

3. The film-forming device for detecting the solid content of the stock solution according to claim 1, wherein the cover plate includes: a first support portion provided on the substrate; a sample-covering portion connected to the first support portion, the inner wall shape of the sample-covering portion being adapted to the inner wall of the sample-containing groove, and being capable of covering the sample-containing groove filled with the stock solution.

4. The film forming device for detecting the solid content of the stock solution according to claim 3, characterized in that, the pressing structure includes: a second support portion provided on the first support portion; a sample-pressing portion connected to the second support portion, the sample-pressing portion being provided on the sample-covering portion for applying pressure to the sample-covering portion.

5. The film forming device for detecting the solid content of the stock solution according to claim 4, characterized in that, the sample-covering portion includes a bottom plate and side plates connected to the bottom plate, the bottom plate and the side plates enclosing a sample-pressing cavity, and the sample-pressing portion being matched with the sample-pressing cavity.

6. The film forming device for detecting the solid content of the stock solution according to claim 4, characterized in that, the pressing structure further includes a hand-held portion provided on a side of the second support portion away from the sample-pressing portion.

7. The film-forming device for detecting the solid content of the stock solution according to claim 1, characterized in that, When there are a plurality of the sample-containing grooves, the bottom walls of the sample-containing grooves are located in the same plane.

8. The film-forming device for detecting the solid content of the stock solution according to claim 1, characterized in that, the film-forming device further includes a water-bath film-stripping mechanism for containing the film-forming mold to separate the film sample from the film-forming mold.

9. The film forming device for detecting the solid content of the stock solution according to claim 8, characterized in that, the water-bath film-stripping mechanism includes a water-bath container and an oscillation assembly for oscillating the water-bath container or the water in the water-bath container.

10. The film-forming device for detecting the solid content of the stock solution according to claim 9, characterized in that, the oscillation assembly includes one of a mechanical oscillation device, a rotary oscillation device, a magnetic stirring oscillation device, and an ultrasonic oscillation device.

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