Ultrasonic-assisted method for preparing polymer functionalized graphene
An ultrasonic-assisted, polymer technology, applied in the direction of dyeing polymer organic compound treatment, dyeing physical treatment, fibrous filler, etc., can solve the problem of low content of grafted polystyrene, achieve good dispersibility, simple and easy operation , the effect of excellent mechanical properties
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[0031] Example 1:
[0032] In this embodiment, the following steps are used to prepare PVA functionalized graphene:
[0033] (1) Dissolve PVA in deionized water and stir mechanically to obtain a PVA aqueous solution with a concentration of 50g / L;
[0034] (2) Measure 50 ml of the PVA aqueous solution in a container, then add 5 mg of graphene, and continue to stir for 1 hour to obtain a mixed aqueous solution of PVA and graphene;
[0035] (3) Put the mixed aqueous solution of PVA and graphene in an ultrasonic device, use high-purity nitrogen to exhaust the air in the container, turn on the ultrasonic, set the power to 200W, control the temperature at 20℃, the frequency of 15kHz, and the ultrasonic treatment time 2 hours to obtain the ultrasonic treatment product;
[0036] (4) The ultrasonic treatment product is filtered and solvent washed to remove free PVA, and dried to obtain PVA-functionalized graphene.
[0037] A solubility experiment was performed on the PVA-functionalized graphene ...
Example Embodiment
[0047] Example 2:
[0048] In this embodiment, the following steps are used to prepare PVA functionalized graphene:
[0049] (1) It is exactly the same as the step (1) in Example 1, to obtain a PVA aqueous solution with a concentration of 50 g / L;
[0050] (2) It is exactly the same as step (2) in Example 1, to obtain a mixed aqueous solution of PVA and graphene;
[0051] (3) Place the mixed aqueous solution of PVA and graphene in an ultrasonic device, use high-purity nitrogen to exhaust the air in the container, turn on the ultrasonic, set the power to 500W, control the temperature at 60℃, the frequency is 18kHz, and the ultrasonic treatment time 5 hours to obtain the ultrasonic treatment product;
[0052] (4) It is exactly the same as step (2) in Example 1, to obtain PVA functionalized graphene.
[0053] The solubility experiment of the above-prepared PVA non-functionalized graphene shows that the PVA-functionalized graphene can be uniformly dispersed in water to form a black dispersio...
Example Embodiment
[0056] Example 3:
[0057] In this embodiment, the following steps are used to prepare PVA functionalized graphene:
[0058] (1) It is exactly the same as the step (1) in Example 1, to obtain a PVA aqueous solution with a concentration of 50 g / L;
[0059] (2) It is exactly the same as step (2) in Example 1, to obtain a mixed aqueous solution of PVA and graphene;
[0060] (3) Place the mixed aqueous solution of PVA and graphene in an ultrasonic device, use high-purity nitrogen to exhaust the air in the container, turn on the ultrasonic, set the power to 1000W, control the temperature at 80℃, the frequency of 27kHz, and the ultrasonic treatment time 8 hours to obtain the ultrasonic treatment product;
[0061] (4) It is exactly the same as step (2) in Example 1, to obtain PVA functionalized graphene.
[0062] The solubility experiment of the above-prepared PVA non-functionalized graphene shows that the PVA-functionalized graphene can be uniformly dispersed in water to form a black dispersi...
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