Flaky nanometer molybdenum disulfide material, nanometer composite metal anticorrosive coating material and preparation method of flaky nanometer molybdenum disulfide material and nanometer composite metal anticorrosive coating material

Abstract

The invention discloses a preparation method of a flaky nanometer molybdenum disulfide material. The preparation method comprises the steps of dispersing a raw material, namely molybdenum disulfide with a lamellar crystal structure, into a mixed solution of nitric acid and hydrochloric acid; carrying out liquid phase separation by using a heating or ultrasound method; and reacting to obtain the flaky nanometer molybdenum disulfide material. The invention also discloses a nanometer composite metal anticorrosive coating material and a preparation method thereof. The nanometer composite metal anticorrosive coating material is prepared by compounding flaky nanometer molybdenum disulfide and nanometer silicon dioxide sol. The preparation method disclosed by the invention is simple; the raw material is easily available; the flaky nanometer molybdenum disulfide material and the nanometer composite metal anticorrosive coating material are widely applied to the antirust treatment and performance improvement of metal materials; the service life of metal is prolonged; and the energy consumption is reduced.

Description

technical field [0001] The invention relates to the field of preparation of flaky nanometer materials, in particular to a preparation method of a flaky nanometer molybdenum disulfide material, a nanocomposite metal anti-corrosion coating material and a preparation method thereof. Background technique [0002] Sheet-shaped nano-molybdenum disulfide materials have different thermal, electrical, optical, and mechanical properties from bulk materials, and have broad potential application prospects in the field of optoelectronic devices, composite materials, and friction materials. At present, micro-mechanical force peeling method, lithium ion intercalation method, liquid phase ultrasonic method, etc. can be used for peeling. Micro-mechanical force peeling method is the most mature method because of its relatively simple operation and high peeling degree. It can obtain monolayer Molybdenum disulfide and the stripped product have high carrier mobility, and are generally used to ma...

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Problems solved by technology

At present, micro-mechanical force peeling method, lithium ion intercalation method, liquid phase ultrasonic method, etc. can be used for peeling. Micro-mechanical force peeling method is the most mature method because of its relatively simple operation and high peeling degree. It can obtain monolayer Molybdenum disulfide and the stripped product have high carrier mobility, and are generally used to make field effect transistors. The disadvantage is that the preparation scale is small and the reproducibility is poor (ACS Nano2010, 4, 2695; Nat.Nanotechnol.2011, 6 , 147.); Lithium ion intercalation method is the method with relatively high stripping efficiency at present. Lithium ion intercalation method was first started in 1986. Morrison et al. firstly prepared monolayer molybdenum disulfide by this method. The basic principle is to use lithium Ionic intercalants (such as butyllithium, n-C4H9Li) are intercalated into the molybdenum disulfide powder to form Li x MoS 2 (x ≥ 1) intercalation compound, and then increase the layer of molybdenum disulfide by a large amount of hydrogen generated by the violent reaction between the intercalation compound and the protic solvent (usually water, dilute acid or low-boiling point alcohols can also be used) spacing, and then obtain multi-layer or even single-layer molybdenum disulfide. The basic steps for lithium ion intercalation method to strip molybdenum disulfide are: first place molybdenum disulfide powder and n-butyllithium n-hexane solution in an inert gas at 100 °C React in the environment for 3 days to get the exfoliated intercalation, then add water and other protic solvents, then sonicate for 60 minutes, filter, centrifuge the suspension and wash it with deionized water for several times until neutral, and finally vacuum dry to obtain graphene Molybdenum disulfide, the disadvantage is time-consuming, strict preparation conditions, and the removal of lithium ions can easily lead to the accumulation of graphene-like molybdenum disulfide (Mater.Res.Bull.1986,21,457; Adv.Mater.2002,14,265 .); liquid phase ultrasonic method recently newly developed method, in 2011, Coleman et al. added N-methyl-2-pyrrolidone (NMP) to molybdenum disulfide powder, N-ethyl-2-pyrrolidone (NVP) , isopropanol (IPA), dimethylsulfoxide (DMSO), dimethylformamide (DMF), etc., followed by ultrasonication, centrifugation, and vacuum drying to obtain graphene-like molybdenum disulfide, but its peeling degree and The stripping efficiency is lower than the first two methods, and the yield of flake nanomolybdenum disulfide is very low, and the yield only reaches more than ten percent (Science2011, 331, 568; Adv.Mater.2011, 23, 417)

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