Organosilicon surfactant and thiol-ene click chemistry process preparation method thereof

Abstract

Provided are an organosilicon surfactant and a thiol-ene click chemistry process preparation method thereof. The organosilicon surfactant is of a structure shown in a formula (I) (shown in the description), wherein the m and the n are integers, the sum of the m and the n is greater than 20 but is smaller than 100, the x is 10-100, the y is 0-80, the x and the y are integers, and the R is C1-10 straight-chain or heterogeneous long-chain alkyl or alkyl phenyl. The preparation method comprises the steps that thiol polyether and vinyl polysiloxane serve as raw materials and are dissolved in a benign solvent, a light initiator is added under stirring for reaction, the reaction materials are subjected to vacuum rotary evaporation at the temperature of 25-45 DEG C to remove the solvent after the reaction is completed, then vacuum drying is performed at the temperature of 30-60 DEG C for 2-48 hour to obtain the organosilicon surfactant having structural characteristics shown in the formula (I). Precious metal catalysts (such as a metal platinum catalyst) used for synthesis of organosilicon surfactants in the prior art are abandoned, and environmental protection and safety and widening of the product application field are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of surfactants and their preparation, and in particular relates to an organic silicon surfactant and a preparation method thereof by a mercapto-ene click chemistry method. Background technique [0002] Surfactant is a functional material that can greatly reduce the surface tension of the solution and change the interface state of the system with a very small amount, thereby playing a series of functions such as emulsification, wetting, foaming, defoaming, and solubilization. As a rising star in the field of surfactants, silicone surfactants are widely used in the fields of polyurethane rigid foam, soft foam, high resilience, foam stabilizer and foam stabilizer because of their excellent performance. [0003] At present, most non-ionic silicone surfactants are catalyzed by platinum complexes through the Si-H bond of polymethylhydrogensiloxane and the C=C bond of the vinyl-terminated hydrophilic segment throug...

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Problems solved by technology

Therefore, this type of traditional method has some disadvantages: metal platinum is very expensive, and it is difficult to remove during the purification process, which not only affects product performance but also limits its application in biomedicine and other fields; the reaction conditions are harsh, and generally require anhydrous and anhydrous Oxygen environment and long reaction time; the presence of some active groups will have a great impact on the catalytic activity of the catalyst; the hydrosilylation reaction product contains both Markovsky rule and anti-Markovsky rule products, so that the structure of the surfactant is consistent with Performance Relationship Research Gets More Complicated

However, there are no literature reports or patent applications about the preparation of silicone surfactants by mercapto-ene click chemistry.

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