PH value testing device for polyacrylonitrile-based carbon fiber

Abstract

The utility model discloses a polyacrylonitrile-based carbon fiber PH value testing device which comprises a bottom plate, L-shaped supporting frames are fixedly connected to the top of the bottom plate at equal intervals, inserting grooves are formed in the tops of the L-shaped supporting frames, PH electrode pens are placed in the inserting grooves, beakers are placed on the top of the bottom plate and located at the concentric positions of the PH electrode pens, and the beakers are connected with the L-shaped supporting frames. Liquid with the PH value to be detected is contained in the beaker, and the PH electrode pen is used in cooperation with the beaker. According to the polyacrylonitrile-based carbon fiber PH value testing device disclosed by the utility model, the PH values of a plurality of groups of liquid can be simultaneously measured through the arranged testing device, so that the time for waiting for detection reaction is shortened, time and labor are saved, rapid detection is facilitated, and the efficiency is relatively high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of PH value test, especially relates to polyacrylonitrile based carbon fiber PH value testing device. BACKGROUND

[0002] PH value, also called hydrogen ion concentration index, acid-base value, is a kind of scale of hydrogen ion activity in solution, usually used to measure the acid-base degree of solution.

[0003] The existing polyacrylonitrile based carbon fiber PH value test mode is generally that the staff places the solution to be detected in a beaker, then holds a PH electrode pen by hand, inserts the detection end of the PH electrode pen into the liquid, waits for a while, then takes out the PH electrode pen from the liquid, reads the PH value of the liquid through the value on the PH electrode pen, and then detects the next group.

[0004] According to the above related technology, the applicant believes that the above technical PH value detection mode can only detect one kind of liquid at a time, needs to wait each time, is time-consuming and laborious, is not conducive to rapid detection, and is low in efficiency, and the polyacrylonitrile based carbon fiber PH value testing device is pushed out for the above problems. UTILITY MODEL CONTENTS

[0005] The utility model discloses polyacrylonitrile based carbon fiber PH value testing device, aims at solving the technical problem that the mode of PH value can only detect one kind of liquid at a time, needs to wait each time, is time-consuming and laborious, is not conducive to rapid detection, and is low in efficiency.

[0006] In order to achieve the above object, the utility model adopts the following technical scheme:

[0007] Polyacrylonitrile based carbon fiber PH value testing device, including the bottom plate, the top equidistance fixed connection of bottom plate has L shaped support frame, the top of L shaped support frame is equipped with the slot, the inside of slot places the PH electrode pen, the top of bottom plate and the concentricity of PH electrode pen place has the beaker, the inside of beaker holds the liquid to be detected PH value, the PH electrode pen and beaker are used mutually.

[0008] In a preferred scheme, the top of the L-shaped support frame is fixedly connected with a connecting frame, a stable groove is formed at the top of the connecting frame and is concentric with the slot, and the stable groove and the slot are used mutually.

[0009] In a preferred scheme, a placing groove is formed at the top of the bottom plate and below the beaker.

[0010] In a preferred scheme, a rubber pad for increasing friction is fixedly connected to the bottom of the bottom plate.

[0011] In a preferred scheme, the inner wall of the slot and the stabilizing groove are fixedly connected with a silica gel layer for protecting the PH electrode pen.

[0012] The polyacrylonitrile-based carbon fiber PH value testing device has the following advantages:

[0013] Firstly, the test device is arranged, so that the PH values of multiple groups of liquid can be determined at the same time, the time for waiting for detection reaction is reduced, time and labor are saved, rapid detection is facilitated, and the efficiency is higher.

[0014] Secondly, the placing groove is arranged, so that the stability of the beaker is increased, the rubber pad is arranged, so that the friction is increased, and the silica gel layer is arranged, so that the PH electrode pen is protected and the bumping is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The utility model provides a polyacrylonitrile-based carbon fiber PH value testing device's three-dimensional front view schematic diagram.

[0016] Figure 2 The utility model provides a polyacrylonitrile-based carbon fiber PH value testing device's three-dimensional top view schematic diagram.

[0017] Figure 3 The utility model provides a polyacrylonitrile-based carbon fiber PH value testing device's three-dimensional rear view schematic diagram.

[0018] In the drawing, 1 is bottom plate, 2 is L-shaped support frame, 3 is slot, 4 is PH electrode pen, 5 is beaker, 6 is connecting frame, 7 is stabilizing groove, 8 is placing groove, 9 is rubber pad. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and indicated in the drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0020] REFERENCE Figure 1 - Figure 3A polyacrylonitrile-based carbon fiber pH testing device includes a base plate 1. An L-shaped support frame 2 is fixedly connected to the top of the base plate 1 at equal intervals. A slot 3 is formed in the top of the L-shaped support frame 2, and a pH electrode pen 4 is placed inside the slot 3. A beaker 5 is placed on the top of the base plate 1, concentric with the pH electrode pen 4, and contains a liquid whose pH value is to be tested. The pH electrode pen 4 and the beaker 5 work together. A connecting frame 6 is fixedly connected to the top of the L-shaped support frame 2. A stabilizing groove 7 is formed in the top of the connecting frame 6, concentric with the slot 3, and works together with the slot 3.

[0021] The above technical solution suffers from the drawback that pH-based methods can only detect one type of liquid at a time, requiring waiting period after each test, which is time-consuming, labor-intensive, and not conducive to rapid detection, resulting in low efficiency. To address these issues, the specific operation is as follows:

[0022] Reference Figure 1 - Figure 3 In a preferred embodiment, a certain amount of distilled water is weighed and adjusted to neutral to wash polyacrylonitrile-based carbon fiber. The pH electrode pen 4 is inserted from top to bottom into the stabilizing tank 7 and slot 3 for measurement. The mixed solution of distilled water and polyacrylonitrile-based carbon fiber is tested. Through the set testing device, the pH value of multiple liquids can be measured at the same time, which reduces the waiting time for the detection reaction, saves time and effort, facilitates rapid detection, and has high efficiency.

[0023] Reference Figure 1 - Figure 3 In a preferred embodiment, a placement groove 8 is provided on the top of the base plate 1, below the beaker 5. A rubber pad 9 for increasing friction is fixedly connected to the bottom of the base plate 1. A silicone layer for protecting the pH electrode pen 4 is fixedly connected to the inner walls of both the slot 3 and the stabilizing groove 7. The placement groove 8 increases the stability of the beaker 5, the rubber pad 9 increases friction, and the silicone layer protects the pH electrode pen 4 from impacts.

[0024] Working principle: Step 1: Turn on the pH meter and preheat for 15 minutes;

[0025] Step 2: Take out the pH electrode pen 4 that has been soaked in potassium chloride solution, rinse the electrode pen 3 times with deionized water, and wipe the electrode pen clean with neutral filter paper.

[0026] Step 3: Perform calibration in buffer solutions with pH=6.86 and 4.00. After calibration, rinse the electrode pen three times with deionized water and wipe it clean with neutral filter paper.

[0027] Step 4: Weigh 300±0.2g of deionized water on an electronic balance and place it in a 500mL round-bottom flask. Add a stirring magnet and place the flask on a stirrer to stir.

[0028] Step 5: Insert the pH electrode pen 4 into the stabilizing tank 7 and slot 3 from top to bottom for measurement. Based on the measured value, adjust the pH value of the deionized water to 7.00±0.03 using 0.005mol / L sodium hydroxide solution or 0.005mol / L sulfuric acid solution.

[0029] Step 6: Under zero tension, measure 3 m of moist polyacrylonitrile-based carbon fiber using a fiber length measuring instrument. During fiber cutting, ensure the fiber remains taut and the cut is straight and neat. Place the polyacrylonitrile-based carbon fiber in a round-bottom flask containing deionized water with a pH of 7.00±0.03.

[0030] Step 7: Attach a spherical condenser to the round-bottom flask and place it in a water bath. Control the temperature of the deionized water in the round-bottom flask to 75±2℃ and maintain the boiling for 30 minutes.

[0031] Step 8: After the cooking is complete, place the round-bottom flask in a water bath at 25±3℃. When the temperature of the mixed solution of deionized carbon fiber and polyacrylonitrile-based carbon fiber in the round-bottom flask drops to 25±3℃, pour out 100mL of sample solution, insert pH electrode pen 4, and record the value shown by the pH meter after it stabilizes. This value is the pH value of polyacrylonitrile-based carbon fiber.

[0032] Furthermore, the pH meter used was a Leici PHS-3C;

[0033] The above steps can be performed on multiple groups simultaneously to reduce waiting time.

[0034] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A device for testing the pH of polyacrylonitrile-based carbon fibers, comprising a base plate (1), characterized in that: The top of the bottom plate (1) is fixedly connected with an L-shaped support frame (2), the top of the L-shaped support frame (2) is provided with a slot (3), the slot (3) is internally placed with a PH electrode pen (4), the top of the bottom plate (1) and the concentric position of the PH electrode pen (4) are placed with a beaker (5), the inside of the beaker (5) is placed with a liquid to be detected, and the PH electrode pen (4) and the beaker (5) are used in cooperation.

2. The polyacrylonitrile-based carbon fiber pH test device according to claim 1, characterized by: The top of the L-shaped support frame (2) is fixedly connected with a connecting frame (6), the top of the connecting frame (6) and the concentric position of the slot (3) are provided with a stabilizing groove (7), and the stabilizing groove (7) and the slot (3) are used in cooperation.

3. The polyacrylonitrile-based carbon fiber pH test device according to claim 1, characterized by: The top of the bottom plate (1) and below the beaker (5) are provided with a placing groove (8).

4. The polyacrylonitrile-based carbon fiber pH test device according to claim 1, characterized by: The bottom of the bottom plate (1) is fixedly connected with a rubber pad (9) for increasing friction.

5. The polyacrylonitrile-based carbon fiber pH test device according to claim 1, characterized by: The inner walls of the slot (3) and the stabilizing groove (7) are all fixedly connected with a silica gel layer for protecting the PH electrode pen (4).

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