Oligomeric surfactant, preparation method thereof and application of oligomeric surfactant in industrial cleaning agent

Abstract

The invention discloses an oligomeric surfactant, a preparation method thereof and application of the oligomeric surfactant in an industrial cleaning agent, and belongs to the technical field of preparation of oligomeric surfactants, and the method comprises the following steps: mixing dialkyl dimethyl ammonium bromide and chloroacetyl chloride, then adding N, N-dimethyl dodecylamine, reacting to obtain the oligomeric surfactant, and then adding N, N-dimethyl dodecylamine into the oligomeric surfactant for reacting to obtain the oligomeric surfactant. The reaction temperature is 20-45 DEG C, and the mixing time is 2-3 hours. The oligomeric surfactant can integrate the properties of emulsification oil removal, decontamination, metal corrosion inhibition, bacteriostasis, sterilization, low foam and the like at extremely low concentration. When the surfactant is used in the industrial cleaning agent, the use amount of the surfactant in the industrial cleaning agent is greatly reduced, the COD value of the industrial cleaning agent is greatly reduced, and the environment-friendly treatment cost of industrial cleaning waste liquid is greatly reduced. The preparation method disclosed by the invention is simple in preparation process, mild in reaction condition, short in reaction period, simple in post-treatment and easy for industrial production.

Description

Technical Field

[0001] The invention belongs to the technical field of oligomeric surfactant preparation, and in particular relates to an oligomeric surfactant and a preparation method thereof and application of the oligomeric surfactant in industrial cleaning agents. Background Art

[0002] The core material used in the field of industrial cleaning agents is surfactants, including non-ionic surfactants for emulsification and oil removal, anionic surfactants for dispersion and decontamination, cationic surfactants for antiseptic and antibacterial, and amphoteric surfactants for antistatic and metal corrosion inhibition. These four types of surfactants each play a different role in industrial cleaning agents. However, traditional surfactants are all amphiphilic structures with a single head and a single tail, and their surface activity and assembly capacity are limited. It is necessary to select the above-mentioned multiple surfactants for multi-orthogonal compounding to obtain industrial cleaning agent products with excellent comprehensive performance. In addition, the proportion and dosage in industrial cleaning agent products are large, resulting in high product cost, complex multi-compound orthogonal test formulation process, high product COD value, difficulty and high cost in COD degradation treatment of cleaning agent waste liquid, and difficulty in meeting the current requirements of low-concentration, ultra-high-efficiency and environmentally friendly cleaning.

[0003] Two or more amphiphilic moieties are chemically linked on or near their head groups through linking groups to obtain dimers (commonly known as Gemini surfactants), trimers, tetramers, or even oligomeric surfactants with higher oligomerization. Gemini surfactants have many properties superior to traditional single-chain surfactants, such as lower critical micelle concentration (CMC), higher surface activity, lower Krafft point, excellent rheological properties, novel and diverse aggregate structures, and better wetting effects, etc., and they show stronger capabilities in washing, sterilization, emulsification, dispersion, and antiseptic properties.

[0004] Therefore, it is necessary to develop new and efficient surfactants with higher surface activity, higher assembly ability at the gas-liquid interface, solid surface and solution phase, which can integrate the properties of emulsification degreasing, decontamination, metal corrosion inhibition, antibacterial, bactericidal and low foaming at extremely low concentrations, and their application in industrial cleaning agents. Summary of the invention

[0005] In order to solve the problems in the prior art, the present invention provides an oligomeric surfactant, which is prepared from the following raw materials: dialkyl dimethyl ammonium bromide, chloroacetyl chloride, N , N -Dimethyldodecylamine.

[0006] Preferably, the dialkyl dimethyl ammonium bromide, chloroacetyl chloride, N , N -The mass ratio of dimethyldodecylamine is 1-4:2-3:3-5.

[0007] Preferably, the dialkyldimethylammonium bromide is one or more of dioctaalkyldimethylammonium bromide, didecyldimethylammonium bromide and didodecyldimethylammonium bromide.

[0008] Preferably, the pH of the oligomeric surfactant is 9-12.

[0009] Preferably, the concentration of dialkyl dimethyl ammonium bromide is 80-100 mM, and the concentration of chloroacetyl chloride is 100-150 mM. N , N -Dimethyldodecylamine concentration is 70-100 mM.

[0010] Preferably, the preparation method comprises the following steps: mixing dialkyl dimethyl ammonium bromide and chloroacetyl chloride, and then adding N , N -dimethyl dodecylamine, react to obtain an oligomeric surfactant, preferably, the reaction temperature is 20-45°C, and the mixing time is 2-3 hours.

[0011] The present invention also provides an industrial cleaning agent, which comprises raw materials and the oligomeric surfactant.

[0012] Compared with the prior art, the present invention has the following advantages: The oligomeric surfactant prepared by the present invention has more hydrophilic head groups and hydrophobic alkyl chains, has a more complex and diverse molecular configuration, has a lower critical micelle concentration, higher surface activity and stronger aggregation ability, can form large aggregates through strong hydrophobic association between molecules at extremely low concentrations, greatly improves the use efficiency of the surfactant, and can integrate the performances of emulsification degreasing, decontamination, metal corrosion inhibition, antibacterial, sterilization, low foaming, etc. at extremely low concentrations. When used in industrial cleaning agents, the amount of surfactant used in the industrial cleaning agent is greatly reduced, the COD value of the industrial cleaning agent and the environmental protection treatment cost of industrial cleaning waste liquid are greatly reduced. The preparation process involved in the present invention is simple, the reaction conditions are mild, the reaction cycle is short, the post-treatment is simple, and it is easy to industrialize production. DETAILED DESCRIPTION

[0013] The technical scheme of the present invention will be further described in detail below in conjunction with specific embodiments. It should be understood that the following embodiments are only exemplary descriptions and explanations of the present invention, and should not be construed as limiting the scope of protection of the present invention. All technologies realized based on the above content of the present invention are included in the scope that the present invention is intended to protect.

[0014] Unless otherwise specified, the raw materials and reagents used in the following examples are commercially available or can be prepared by known methods. Example

[0015] Mix dialkyl dimethyl ammonium bromide and chloroacetyl chloride, then add N , N -dimethyl dodecylamine, the reaction yields oligomeric surfactants, dialkyl dimethyl ammonium bromide, chloroacetyl chloride, N , N -The mass ratio of dimethyldodecylamine is 4:2:3, the concentration of dialkyldimethylammonium bromide is 80mM, and the concentration of chloroacetyl chloride is 150mM, N , N -Dimethyldodecylamine concentration was 100 mM, reaction temperature was 25°C, and mixing time was 2 hours. Example

[0016] Mix dialkyl dimethyl ammonium bromide and chloroacetyl chloride, then add N , N -dimethyl dodecylamine, the reaction yields oligomeric surfactants, dialkyl dimethyl ammonium bromide, chloroacetyl chloride, N , N -The mass ratio of dimethyldodecylamine is 4:3:3, the concentration of dialkyldimethylammonium bromide is 100mM, and the concentration of chloroacetyl chloride is 150mM, N , N -Dimethyldodecylamine concentration was 100 mM, reaction temperature was 30°C, and mixing time was 3 hours. Example

[0017] Mix dialkyl dimethyl ammonium bromide and chloroacetyl chloride, then add N , N -dimethyl dodecylamine, the reaction yields oligomeric surfactants, dialkyl dimethyl ammonium bromide, chloroacetyl chloride, N , N -The mass ratio of dimethyldodecylamine is 3:2:5, the concentration of dialkyldimethylammonium bromide is 90mM, and the concentration of chloroacetyl chloride is 100mM, N , N -Dimethyldodecylamine concentration was 70 mM, reaction temperature was 45°C, and mixing time was 2 hours. Example

[0018] Mix dialkyl dimethyl ammonium bromide and chloroacetyl chloride, then add N , N -dimethyl dodecylamine, the reaction yields oligomeric surfactants, dialkyl dimethyl ammonium bromide, chloroacetyl chloride, N , N -The mass ratio of dimethyldodecylamine is 2:3:5, the concentration of dialkyldimethylammonium bromide is 100mM, and the concentration of chloroacetyl chloride is 130mM, N , N-Dimethyldodecylamine concentration was 100 mM, reaction temperature was 40°C, and mixing time was 3 hours.

[0019] The oligomeric surfactant prepared in Examples 1-4 was formulated into an industrial cleaning agent, the original ingredients of which are as follows: HFE7100 25%, HFC-4310mcf 30%, alcohol ethers 8%, hydrocarbon solvents 10%, penetrant 8%, oligomeric surfactants 0.5%, water 18.5%.

[0020] The prepared industrial cleaning agent was tested and the results were as follows:

[0021] From the above results, it can be concluded that the oligomeric surfactant prepared by the present invention improves the utilization efficiency of the surfactant. It can integrate the properties of emulsification and oil removal, decontamination, metal corrosion inhibition, antibacterial, sterilization, low foaming, etc. at extremely low concentrations. When added to industrial cleaning agents, the amount of surfactant used in the industrial cleaning agents is greatly reduced, the COD value of the industrial cleaning agents is greatly reduced, and the cost of environmental protection treatment of industrial cleaning waste liquid is greatly reduced.

[0022] The above descriptions are merely embodiments of the present invention. It should be pointed out that, for those skilled in the art, various changes, modifications, substitutions and variations can be made to these embodiments without departing from the technical principles of the present invention. These changes, modifications, substitutions and variations should also be regarded as the scope of protection of the present invention.

Claims

1. An oligomeric surfactant, characterized in that The oligomeric surfactant is prepared from the following raw materials: dialkyl dimethyl ammonium bromide, chloroacetyl chloride, N , N -Dimethyldodecylamine.

2. An oligomeric surfactant according to claim 1, characterized in that The dialkyl dimethyl ammonium bromide, chloroacetyl chloride, N , N -The mass ratio of dimethyldodecylamine is 1-4:2-3:3-5.

3. An oligomeric surfactant according to claim 1, characterized in that The dialkyl dimethyl ammonium bromide is one or more of dioctaalkyl dimethyl ammonium bromide, didecyl dimethyl ammonium bromide and didodecyl dimethyl ammonium bromide.

4. An oligomeric surfactant according to claim 1, characterized in that The pH of the oligomeric surfactant is 9-12.

5. An oligomeric surfactant according to claim 1, characterized in that The concentration of dialkyl dimethyl ammonium bromide is 80-100 mM, and the concentration of chloroacetyl chloride is 100-150 mM. N , N -Dimethyldodecylamine concentration is 70-100 mM.

6. The method for preparing the oligomeric surfactant according to any one of claims 1 to 5, characterized in that: The preparation method comprises the following steps: mixing dialkyl dimethyl ammonium bromide and chloroacetyl chloride, and then adding N , N -dimethyl dodecylamine, react to obtain an oligomeric surfactant, preferably, the reaction temperature is 20-45°C, and the mixing time is 2-3 hours.

7. An industrial cleaning agent, characterized in that: The industrial cleaning agent contains the oligomeric surfactant according to any one of claims 1 to 6. Preferably, the industrial cleaning agent comprises raw materials and the oligomeric surfactant.

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