A kind of macro-preparation device and method of carboxyl functionalized graphene
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A technology for preparing devices and fossils, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of complex preparation process, inability to disperse well, and low reactivity, and achieve good dispersion effect and improved mechanical properties. The effect of good sexual effect and high reactivity
Active Publication Date: 2019-04-02
CHANGZHOU HIGHBERY NEW NANO MATERIALS TECH CO LTD +1
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[0005] At present, the problems of carboxylated graphene are: the preparation process is complicated, the carboxyl group of the obtained carboxylated graphene is in the sheet or on the edge, the reactivity is low, and the steric hindrance effect is large, especially in the in-situ polymerization modification. At the same time, only a small part of the carboxyl groups can form bonds with the matrix material in the form of chemical bonds and disperse in the product, which cannot be well dispersed, and may even cause polymerization inhibition.
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Embodiment 1
[0038] A kind of macro-preparation device of carboxyl functionalized graphene of the present embodiment, such as figure 1 As shown, it includes the first dispersion tank 1, activation reactor 2, first filter washing tower 3, second dispersion tank 4, reaction kettle 5, second filter washing tower 6, third dispersion tank 7, drying tower 8, the first A storage tank 9 and a second storage tank 10, the first dispersion tank 1, the activation reactor 2, the first filter washing tower 3, the second dispersion tank 4, the reaction tank 5, the second filtration washing tower 6, and the third dispersion tank 7 and the drying tower 8 are connected in sequence, the first filter washing tower 3, the first storage tank 9 and the first dispersion tank 1 are connected in sequence, and the second filter washing tower 6, the second storage tank 10 and the second dispersion tank 4 are connected in sequence.
[0039] Among them: the first dispersing kettle 1 is the place where the raw material ...
Embodiment 2
[0050] This embodiment also adopts the device described in Example 1 to carry out the macro-preparation of carboxyl-functionalized graphene, including the following steps:
[0051] Step 1, put graphite oxide and sodium hydroxide solution into the first dispersing kettle 1, disperse and strip through the simultaneous operation of high-shear emulsifier and ultrasonic dispersing device, and adjust the amount and concentration of sodium hydroxide solution to make the pH of the system To 8.5, through the cooling coil installed in the kettle, the dispersion temperature is controlled below 40°C, the speed of the high-shear emulsifier is 600r / min, the ultrasonic power is 10kW, and the ultrasonic time is 60min to obtain graphene oxide water-based slurry.
[0052] Step 2: Pass the slurry obtained in Step 1 into the activation reactor 2 through pipeline transportation, and add sodium chloroacetate, after fully stirring, control the reaction temperature at 75°C, and carry out the carboxyl ...
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Abstract
The invention discloses a macro preparation device and method of carboxyl functionalized graphene and belongs to the technical field of preparation of graphene. The macro preparation device comprisesa first dispersion kettle, an activation reactor, a first filtering and washing tower, a second dispersion kettle, a reaction kettle, a second filtering and washing tower, a third dispersion kettle, adrying tower, a first storage tank and a second storage tank, wherein the first dispersion kettle, the activation reactor, the first filtering and washing tower, the second dispersion kettle, the reaction kettle, the second filtering and washing tower, the third dispersion kettle and the drying tower are connected in sequence; the first filtering and washing tower, the first storage tank and thefirst dispersion kettle are connected in sequence; the second filtering and washing tower, the second storage tank and the second dispersion kettle are connected in sequence. The macro preparation device and method of the carboxyl functionalized graphene, disclosed by the invention, have the advantages of simple and compact structure, reasonable design, high continuous degree and less equipment investment; the carboxyl functionalized graphene can be efficiently prepared and the production cost is reduced.
Description
technical field [0001] The invention belongs to the technical field of graphene preparation, and more specifically, relates to a macro-preparation device and method of carboxyl-functionalized graphene. Background technique [0002] Graphene is a new type of two-dimensional carbon nanomaterial, which has a unique monoatomic layer two-dimensional crystal structure, high specific surface area, high strength, electrical conductivity, thermal conductivity and other unique properties. It is known as "the miracle that changes the 21st century". Material". However, due to its large specific surface area and high surface energy, pure graphene is very easy to agglomerate in solvents and matrices, which greatly restricts its intrinsic excellent characteristics. Functionalized graphene retains the properties of graphene while , supporting functional groups, endowing it with good compatibility and adjustable chemical, electrical and other properties, effectively solving the problem of d...
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