Preparation method of cellulose polyvinyl alcohol composite film and supercapacitor based on phase inversion
A technology of polyvinyl alcohol and polyvinyl alcohol solution, which is applied in the field of electrochemical materials, can solve the problems of low liquid absorption rate and liquid retention rate, low surface energy, lyophilicity, and poor wettability, and achieve high liquid absorption rate , Good lyophilicity, high liquid retention effect
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Embodiment 1
[0041] 1) Take an appropriate amount of dry straw, cut it into small pieces of 3 to 4 cm, and then use a universal pulverizer for pulverization (each pulverization takes about 30s), and then screen with a 40-mesh sieve to separate out the cellulose that is required for subsequent experiments. raw material.
[0042] 2) Put the screened powder into a solution with a bath ratio of 50g / L for heating in a water bath, and add an appropriate amount of 40g / L NaOH and 2g / L NaHSO to the solution. 3 , the temperature of the water bath is controlled at 90 degrees Celsius, and the mixture is heated for 4 hours, and during this period, sufficient stirring is performed to facilitate the reaction.
[0043] 3) filter out the solid, add 10g / L sodium chlorite, 5~6ml acetic acid (commercially available concentration 36~38% acetic acid), stir and heat under 70 ℃ of water bath conditions for 4 hours, every 1 hour during the period Add acetic acid once, and add 5-6ml each time. After the water bat...
Embodiment 2
[0051] The difference between this example and Example 1 is that the amount of cellulose and polyvinyl alcohol added in step (6) is different (see Table 1 for details), and the prepared composite film is CP-15.
Embodiment 3
[0053] The difference between this example and Example 1 is that the amount of cellulose and polyvinyl alcohol added in step (6) is different (see Table 1 for details), and the prepared composite film is CP-20.
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