Preparation method and application of multifunctional chitosan composite sponge
A technology of composite sponge and chitosan, applied in the directions of botanical equipment and methods, applications, separation methods, etc., can solve the problem of no sterilization effect, and achieve the effects of low cost, convenient secondary recovery and high sterilization rate
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[0032] Example 1: In this embodiment, GO-CS composite sponge is prepared according to the following steps:
[0033] The first step uses the Hummer method to prepare GO nanosheets,
[0034] a. Synthesis stage of graphite oxide:
[0035] First, add 50ml of concentrated sulfuric acid and 25ml of concentrated nitric acid into a round bottom flask, and stir magnetically for 20 minutes in an ice bath. Then slowly add 4g of natural flake graphite and stir vigorously to avoid graphite agglomeration. After it is uniformly dispersed, slowly add 44 g of potassium chlorate (the speed is controlled to be completed within one hour). Finally, the ice bath was removed, and the reaction was allowed to react at room temperature for 96 hours. Since this reaction produces a large amount of chlorine gas, sodium hydroxide solution is used to absorb the chlorine gas produced by the reaction. After 96 hours, the natural flake graphite was oxidized into graphite oxide.
[0036] b. Mechanical peeling stage...
Example Embodiment
[0045] Example 2: In this embodiment, GO-CS composite sponge is prepared according to the following steps:
[0046] Step 1 Use the Hummer method to prepare GO nanosheets,
[0047] a. Synthesis stage of graphite oxide:
[0048] First, add 50ml of concentrated sulfuric acid and 25ml of concentrated nitric acid into a round bottom flask, and stir magnetically for 20 minutes in an ice bath. Then slowly add 4g of natural flake graphite and stir vigorously to avoid graphite agglomeration. After it is uniformly dispersed, slowly add 44 g of potassium chlorate (the speed is controlled to be completed within one hour). Finally, the ice bath was removed, and the reaction was allowed to react at room temperature for 96 hours. Since this reaction produces a large amount of chlorine gas, sodium hydroxide solution is used to absorb the chlorine gas produced by the reaction. After 96 hours, the natural flake graphite was oxidized into graphite oxide.
[0049] b. Mechanical peeling stage:
[0050]...
Example Embodiment
[0058] Example 3: In this embodiment, GO-CS composite sponge is prepared according to the following steps:
[0059] Step 1 Use the Hummer method to prepare GO nanosheets,
[0060] a. Synthesis stage of graphite oxide:
[0061] First, add 50ml of concentrated sulfuric acid and 25ml of concentrated nitric acid into a round bottom flask, and stir magnetically for 20 minutes in an ice bath. Then slowly add 4g of natural flake graphite and stir vigorously to avoid graphite agglomeration. After it is uniformly dispersed, slowly add 44 g of potassium chlorate (the speed is controlled to be completed within one hour). Finally, the ice bath was removed, and the reaction was allowed to react at room temperature for 96 hours. Since this reaction produces a large amount of chlorine gas, sodium hydroxide solution is used to absorb the chlorine gas produced by the reaction. After 96 hours, the natural flake graphite was oxidized into graphite oxide.
[0062] b. Mechanical peeling stage:
[0063]...
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