Preparation method and application of straight-chain methyl vinyl polysiloxane with fluorescence function

Abstract

The invention discloses a preparation method and application of straight-chain methyl vinyl polysiloxane with a fluorescent function. The straight-chain methyl vinyl polysiloxane is synthesized by carrying out hydrosilylation reaction on polysiloxane with a straight-chain molecular structure and a hydrosilyl compound containing a fluorescent group according to a certain molar ratio. Compared with a traditional mode of directly introducing a fluorophore to a polysiloxane main chain, the preparation method disclosed by the invention selects a hydrosilyl compound containing the fluorophore and a silicon-hydrogen bond and polysiloxane containing vinyl, and utilizes an addition reaction of the silicon-hydrogen bond and the vinyl, so that the fluorophore is introduced to the main chain of the polysiloxane; consumption of silicon and hydrogen in polysiloxane can be avoided, and the chemical activity of the raw materials is reserved. The material can display a bright special color under the irradiation of ultraviolet light with a specific wave band, and the chemical reaction process of the material cannot be influenced by adding a certain proportion of the material into conventional linear methyl vinyl polysiloxane, so that the material can be effectively used for polysiloxane precipitation detection of an organic silicon material.

Description

technical field [0001] The invention belongs to the technical field of siloxane, and in particular relates to a preparation method of a linear methyl vinyl polysiloxane with fluorescent function. Background technique [0002] The currently known polysiloxanes with fluorescent functions are mainly divided into two categories. 1. Physically doped fluorescent polysiloxane: The method of preparing cross-linked polysiloxane fluorescent materials by physical doping is simple, but there are generally cases where the compatibility between fluorescent materials and polysiloxanes is not good, and there is also fluorescence The problem of material aggregation or precipitation affects the luminescence uniformity and chemical stability of the material; 2. Chemically bonded methyl vinyl fluorescent polysiloxane: the preparation method is to use the polysiloxane main chain silicon hydrogen or side group silicon hydrogen. The introduction of light-emitting groups, but this method of introd...

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Problems solved by technology

1. Physically doped fluorescent polysiloxane: The method of physically doping to prepare cross-linked polysiloxane fluorescent materials is simple, but the compatibility between fluorescent materials and polysiloxane is generally poor, and there is still fluorescence The problem of material aggregation or precipitation affects the uniformity of light emission and chemical stability of the material; 2. Chemically bonded methyl vinyl fluorescent polysiloxane: the preparation method is on the polysiloxane main chain silicon hydrogen or side group silicon hydrogen Introducing luminescent groups, but this method of introducing luminescent groups will consume the hydrogen content of hydrogen-containing polysiloxane, so that the original chemical activity of the material will be reduced or even lose its activity and become an inert material

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