Polyacrylonitrile carbon fiber pH testing method
A technology of polyacrylonitrile carbon fiber and polyacrylonitrile fiber, which is applied in the field of polyacrylonitrile carbon fiber pH testing, can solve the problem that the pH value of polyacrylonitrile carbon fiber cannot be accurately tested, and achieve asymmetrical potential drop, control the straightness of the cut, and test accurate effect
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Embodiment 1
[0031] A polyacrylonitrile carbon fiber pH test method, comprising the following steps:
[0032] S1, pH electrode pen calibration:
[0033] S1-1, turn on the pH meter, the pH meter is Leici PHS-3C, start up and warm up for 15 minutes;
[0034] S1-2, take out the pH electrode pen soaked in the potassium chloride solution, rinse the electrode pen with deionized water 3 times, and wipe the pH electrode pen with neutral filter paper;
[0035] S1-3, calibrate the pH electrode pen treated by S1-2 in the buffer solution of pH 6.86 and pH 4, rinse the pH electrode pen with deionized water for 3 times after calibration, and deionize the pH electrode pen with neutral filter paper. The pH electrode pen is wiped clean; the buffer solution with a pH of 4 is a saturated solution of potassium hydrogen phthalate;
[0036] S2, polyacrylonitrile fiber pretreatment:
[0037] S2-1, weigh 300.2g of deionized water on an electronic balance and place it in a 500mL round bottom flask, add a stirri...
Embodiment 2
[0044] A polyacrylonitrile carbon fiber pH test method, comprising the following steps:
[0045] S1, pH electrode pen calibration:
[0046] S1-1, turn on the pH meter, the pH meter is Leici PHS-3C, start up and warm up for 15 minutes;
[0047] S1-2, take out the pH electrode pen soaked in the potassium chloride solution, rinse the electrode pen with deionized water 3 times, and wipe the pH electrode pen with neutral filter paper;
[0048]S1-3, calibrate the pH electrode pen treated by S1-2 in the buffer solution of pH 6.86 and pH 4, rinse the pH electrode pen with deionized water for 3 times after calibration, and deionize the pH electrode pen with neutral filter paper. The pH electrode pen is wiped clean, and the buffer solution with a pH of 4 is a saturated solution of potassium hydrogen phthalate;
[0049] S2, polyacrylonitrile fiber pretreatment:
[0050] S2-1, weigh 299.9g of deionized water on an electronic balance and place it in a 500mL round bottom flask, add a sti...
Embodiment 3
[0057] A polyacrylonitrile carbon fiber pH test method, comprising the following steps:
[0058] S1, pH electrode pen calibration:
[0059] S1-1, turn on the pH meter, the pH meter is Leici PHS-3C, start up and warm up for 15 minutes;
[0060] S1-2, take out the pH electrode pen soaked in the potassium chloride solution, rinse the electrode pen with deionized water 3 times, and wipe the pH electrode pen with neutral filter paper;
[0061] S1-3, calibrate the pH electrode pen treated by S1-2 in the buffer solution of pH 6.86 and pH 4, rinse the pH electrode pen with deionized water for 3 times after calibration, and deionize the pH electrode pen with neutral filter paper. The pH electrode pen is wiped clean; the buffer solution with a pH of 4 is a saturated solution of potassium hydrogen phthalate;
[0062] S2, polyacrylonitrile fiber pretreatment:
[0063] S2-1, weigh 300.0g of deionized water on an electronic balance and place it in a 500mL round bottom flask, add a stirri...
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