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A kind of ethanedithiol modified nano-molybdenum disulfide for modified polysulfide sealant and its modification method

A technology of nano-molybdenum disulfide and polysulfide sealants, which is applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problem of modification of the mechanical properties of polysulfide sealants, failure to achieve expected results, failure to Effective dispersion can not be solved to achieve the effect of improving mechanical properties and increasing the strength of interface interaction

Active Publication Date: 2021-06-15
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since there are no functional groups on the surface of molybdenum disulfide, it cannot be effectively dispersed in polysulfide rubber and cannot form interfacial interaction with polysulfide rubber.
Therefore, using molybdenum disulfide as a reinforcing agent for polysulfide sealants cannot achieve the expected effect on the modification of the mechanical properties of polysulfide sealants

Method used

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  • A kind of ethanedithiol modified nano-molybdenum disulfide for modified polysulfide sealant and its modification method
  • A kind of ethanedithiol modified nano-molybdenum disulfide for modified polysulfide sealant and its modification method
  • A kind of ethanedithiol modified nano-molybdenum disulfide for modified polysulfide sealant and its modification method

Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention discloses an ethylenedithiol-modified nanomolybdenum disulfide used for modifying polysulfide sealants and a modification method thereof. At the deletion site, sulfhydryl modification is carried out by ethanedithiol, thereby obtaining thiol nano-molybdenum disulfide. The ethanedithiol-modified nano-molybdenum disulfide of the present invention is used as a reinforcing agent of polysulfide sealant, added to the raw material system of polysulfide sealant, and the polysulfide rubber is modified therein, which can improve the strength of polysulfide sealant. Mechanical properties without destroying its insulation.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, and in particular relates to ethylenedithiol-modified nanomolybdenum disulfide used for modifying polysulfide sealants and a modification method thereof. Background technique [0002] Polysulfide sealant is a sealant made of liquid polysulfide rubber as the main material, combined with vulcanizing agent, reinforcing agent, tackifier, accelerator and other additives. It is an elastic sealing material with a long history. Polysulfide sealants have the characteristics of uniform curing, good chemical resistance, and good weather resistance, and are widely used in construction, transportation, manufacturing and other fields. The type and amount of reinforcing agent have a great influence on the mechanical properties of polysulfide sealants. Studies have shown that when two-dimensional nanomaterials with layered structure are used as reinforcing agents, the mechanical properties of polymers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J181/04C09J11/04C09C1/00C09C3/08
Inventor 陈鹏鹏李喜莲周艺峰聂王焰徐颖
Owner ANHUI UNIVERSITY
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