Ethanedithiol modified nano molybdenum disulfide for modifying polysulfide sealant and modification method thereof
A technology of nano molybdenum disulfide and polysulfide sealant, which is applied in the directions of adhesives, adhesive additives, non-polymer adhesive additives, etc. It can improve the mechanical properties and increase the strength of the interface interaction.
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Embodiment 1
[0027] Embodiment 1, the preparation of ethanedithiol modified nano molybdenum disulfide
[0028] The molar mass ratio of ethanedithiol and lamellar molybdenum disulfide is 2:1. Add lamellar molybdenum disulfide into deionized water and ultrasonically disperse uniformly to obtain a molybdenum disulfide solution; add ethanedithiol to the molybdenum disulfide solution to ultrasonically disperse uniformly, and then freeze-dry the mixed solution to obtain ethanedithiol-modified Nanomolybdenum disulfide.
[0029] The ethanedithiol-modified nanomolybdenum disulfide prepared in this example is analyzed below, and the lamellar molybdenum disulfide is used as a comparison.
[0030] figure 1 Lamellar molybdenum disulfide (MoS 2 ) and ethanedithiol-modified nanomolybdenum disulfide (MMoS 2 ) scanning electron microscope (SEM). Molybdenum disulfide presents a very thin lamellar structure, indicating that the disulfide was successfully peeled off. The surface of nanomolybdenum disulf...
Embodiment 2
[0034] Example 2, Modification of lamellar molybdenum disulfide and ethanedithiol modified nano molybdenum disulfide to polysulfide sealant
[0035] The ethanedithiol modified nanomolybdenum disulfide used in this example is the sample in Example 1.
[0036] In this embodiment, the polysulfide sealant of the following components is taken as an example to verify the modification effect of the lamellar molybdenum disulfide and ethanedithiol-modified nano-molybdenum disulfide on it:
[0037] Polysulfide sealant is composed of base paste and vulcanization paste in a weight ratio of 10:1.
[0038] The composition of each component by weight in the base paste is:
[0039] Filler: 50 parts of nanometer calcium carbonate;
[0040] Plasticizer: 10 parts of butyl phthalate;
[0041] Silane coupling agent: 0.5 parts of bis-(2-(triethoxysilane) propyl)-tetrasulfide (silane coupling agent KH-69);
[0042] Liquid polysulfide rubber: 100 parts of LP-32 liquid polysulfide rubber (Toray Fi...
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