Sulfhydryl-double bond reaction-based acrylate ester/montmorillonite composite and preparation method

Abstract

The invention discloses a sulfhydryl-double bond reaction-based acrylate ester/montmorillonite composite and a preparation method. The preparation method is characterized by comprising the steps of: firstly, forming intercalation modification chemical bond grafted acrylic ester functionalized nano-montmorillonite, then mixing the synthesized polyfunctional group sulfur alcohol, acrylate ester oligomer, acrylate monomer and a light initiator, and finally performing ultraviolet light irradiation to obtain the acrylate ester/montmorillonite ultraviolet cured nano composite. A line for synthesizing a polyfunctional group acrylate ester silane coupling agent and the polyfunctional group sulfur alcohol is simple and easy without toxicity; compared with the traditional method in which the initiator takes up 3 to 5% of total mass, the preparation method disclosed by the invention has the advantages that the usage amount of the light initiator is greatly reduced and only takes up 0.1-0.8% of the total mass, the residual light initiator can be effectively reduced, the harm of fragments to the environment and the health of a human body can be reduced, and higher reaction activity and conversion rate can be achieved; and the compatibility between inorganic components and organic components in the composite is good, and the mechanical property and heat-resistant property are obviously improved.

Description

technical field [0001] The invention belongs to the technical field of acrylate / montmorillonite nano-composite materials, in particular to acrylate / montmorillonite composite materials based on mercapto-double bond reactions, which use multifunctional acrylate-modified nano-montmorillonite as an added component and its preparation method. Background technique [0002] The polymer / inorganic nanocomposite material is a composite material in which the polymer is used as the continuous phase and the ultrafine inorganic components with a size of nanometer (1-100nm) are used as the dispersed phase. The role of nanoparticles in polymer composites can not only enhance the mechanical properties, but also endow the matrix materials with other new functions, such as gas barrier properties, weather resistance, antibacterial properties, and specific optical and electromagnetic properties and thermal stability. According to the report in the British journal "Polymer Reviews" (Polymer Revi...

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Problems solved by technology

[0004] Chinese patent application number 200810020005.5 proposes a kind of grafting of acrylate modifier with isocyanate group on montmorillonite, then adds photoinitiator and acrylate resin, and makes acrylate / In the method of montmorillonite nanocomposite materials, due to the low reactivity of isocyanate and hydroxyl groups on the montmorillonite sheet, and the large steric hindrance effect between the sheets, the dispersion of montmorillonite in the polymer matrix is ​​limited. , the compatibility of the final material is poor; at the same time, the added small molecule photoinitiator will also have adverse effects on the environment and human health

[0005] Chinese patent application number 201210068740.X proposed a modified photoinitiator with quaternary ammonium groups intercalated into the montmorillonite layer, then mixed with acrylate oligomers and monomers, and cured to obtain photoinitiated / Halogen-free flame retardant material method, due to the use of highly toxic acryloyl chloride and methyl iodide in the synthesis process, and the steps are cumbersome, high requirements for equipment; The initiator is used as an intercalation agent, and the waste is large, and the cost of the final product is high, which is not conducive to industrial production

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