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A kind of high-content aqueous graphene dispersion liquid and preparation method thereof
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A water-based graphene, high-content technology, applied in the field of graphene, can solve the problems of low concentration and poor stability of graphene dispersion, and achieve the effects of good nano-particle size and narrow distribution, excellent corrosion resistance and large adsorption capacity
Active Publication Date: 2020-09-01
明光科迪新材料有限公司 +1
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However, the graphene dispersion prepared by these dispersants has low concentration and poor stability.
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Embodiment 1
[0029] A kind of ternary block copolymer dispersant A, its steps are as follows:
[0030] In parts by weight, 25.0 parts of itaconic acid, 12.0 parts of sodium p-styrene sulfonate, 19.0 parts of methacryloxybutyl alcohol monophosphate, 1.6 parts of S, S'-bis(α,α' -Dimethyl-α"-acetic acid) trithiocarbonate, 80.0 parts of ethanol are added in the reaction kettle, logical N 2 Protection, start stirring and dissolve evenly, raise the temperature to 75°C, evenly add 10.0 parts of ethanol solution containing 10% azobisisobutyronitrile dropwise, finish dropping within 0.5h, keep at 75°C and continue the reaction for 6h; then slowly add 10 % NaOH solution and deionized water to adjust the pH to 7-8 to obtain the ternary block copolymer dispersant A.
Embodiment 2
[0032] A kind of ternary block copolymer dispersant B, its steps are as follows:
[0033] In parts by weight, 22.0 parts of itaconic acid, 13.0 parts of sodium p-styrenesulfonate, 15.0 parts of methacryloyloxyethyl alcohol monophosphate, 3.0 parts of 4,4'-dithiophenylacetic acid, 70.0 parts of Virahol joins in the reactor, logical N 2 Protection, start stirring and dissolve evenly, heat up to 70°C, add 8.0 parts of isopropanol solution containing 10% azobisisobutylamidine hydrochloride dropwise evenly, drop it within 0.5h, keep at 70°C to continue the reaction 6h; then slowly add 10% NaOH solution and deionized water to adjust the pH to 7-8 to obtain the ternary block copolymer dispersant B.
Embodiment 3
[0035] A kind of ternary block copolymer dispersant C, its steps are as follows:
[0036] In parts by weight, 16.0 parts of itaconic acid, 10.0 parts of sodium p-styrene sulfonate, 12.0 parts of methacryloyloxyalkylpropanol monophosphate, 2.0 parts of diethyldithiocarbamate Type quaternary ammonium salt, 60.0 parts of water are added in the reaction kettle, logical N 2 Protection, start stirring and dissolve evenly, heat up to 85°C, evenly add 12.0 parts of an aqueous solution containing 10% azobisisobutyronitrile dropwise, finish dropping within 0.5h, keep at 85°C and continue the reaction for 6h; then slowly add 10% NaOH solution and deionized water are adjusted to pH 7-8 to obtain the ternary block copolymer dispersant C.
[0037] The ternary block copolymer dispersant technical index that makes in the embodiment of the present invention is as shown in table 1:
[0038] Table 1 Ternary block copolymer water-based dispersant technical index
[0039] project Examp...
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Abstract
The present invention relates to a high-content aqueous graphene dispersion. The high-content aqueous graphene dispersion comprises MMP, ethanol, a wetting agent, graphene, a triblock copolymer dispersant, other assistants and water; the triblock copolymer dispersant is synthesized from itaconic acid, vinylbenzenesulfonic acid sodium salt, methacryloyl alkylmonophosphate, an RAFT chain transfer agent and an azo initiator through an RAFT technology; and the Mn value of the triblock copolymer dispersant is 3000-8000, and the PDI value of the triblock copolymer dispersant is equal to or less than1.2. The high-content aqueous graphene dispersion is prepared in the invention, and has the advantages of good nano-particle sizes, narrow distribution of the particle sizes, good transparency, goodcompatibility, good storage stability, excellent corrosion resistance, excellent electric conductivity, excellent lubricity, excellent oil resistance, excellent alcohol resistance, excellent water resistance and excellent salt spray resistance. The high-content aqueous graphene dispersion is widely used in the fields of water-based anticorrosion coatings, water-based UV / LED coatings, composite materials, conductive film materials, friction materials and sensors.
Description
technical field [0001] The invention relates to a water-based graphene dispersion liquid, in particular to a high-content water-based graphene dispersion liquid and a preparation method thereof, belonging to the technical field of graphene. Background technique [0002] Graphene is a two-dimensional honeycomb carbonaceous material with extraordinary electrical, optical, thermodynamic, and mechanical properties due to its unique structure. The electron mobility of graphene (2×10 5 cm 2 · v -1 ·s -1 ), which is 100 times higher than that of silicon semiconductors. Widely used in nanoelectronic devices, sensors, nanocomposites, batteries, supercapacitors, hydrogen storage devices, etc. High-concentration, stable and dispersed graphene dispersions have great application prospects, and can be applied to industrial production of graphene composite materials, anti-corrosion coatings, transparent conductive films, etc. [0003] However, graphene has a high specific surface are...
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