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Lignin cationic surfactant, preparation method thereof, long-acting antibacterial agent and preparation method of long-acting antibacterial agent

A surfactant and lignin technology, applied in the field of antibacterial agents, can solve the problems of bacterial resistance, short protection time, and low sterilization rate, and achieve long protection time, fast sterilization speed, and high sterilization rate.

Pending Publication Date: 2020-08-21
雅思汀娜(北京)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many mature and sold antibacterial agents, such as heavy metal antibacterial agents, chlorobenzene antibacterial agents, small molecule quaternary ammonium salt antibacterial agents, etc. These antibacterial agents have some disadvantages, such as easy to wash off, low sterilization rate, The protection time is short, and the chemical sterilization mechanism is easy to cause bacteria to develop drug resistance, etc.

Method used

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  • Lignin cationic surfactant, preparation method thereof, long-acting antibacterial agent and preparation method of long-acting antibacterial agent
  • Lignin cationic surfactant, preparation method thereof, long-acting antibacterial agent and preparation method of long-acting antibacterial agent
  • Lignin cationic surfactant, preparation method thereof, long-acting antibacterial agent and preparation method of long-acting antibacterial agent

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preparation example Construction

[0026] The invention provides a kind of preparation method of lignin cationic surfactant, comprises the following steps:

[0027] (1) Carry out nucleophilic substitution reaction with tertiary amine and epichlorohydrin to obtain intermediate product;

[0028] (2) Mixing the intermediate product and lignin for grafting reaction to obtain a lignin cationic surfactant.

[0029] In the invention, the tertiary amine and epichlorohydrin are subjected to nucleophilic substitution reaction to obtain intermediate products. In the present invention, the tertiary amine is preferably one or more of trimethylamine, triethylamine, tripropylamine and tributylamine; the mass ratio of the epichlorohydrin to the tertiary amine is preferably 0.8 to 1: 1, more preferably 0.85-0.9:1.

[0030] In the present invention, the nucleophilic substitution reaction is specifically preferably: acidify the tertiary amine under acidic conditions, then add epichlorohydrin to react for 1-2 hours, preferably r...

Embodiment 1

[0050] Add triethylamine under acidic conditions (provided by hydrochloric acid, pH value is 2-3), turn on the stirring device to react for 10 minutes, then add epichlorohydrin, react for 1 hour, adjust the pH to neutral, continue to react for 3 hours, and obtain the intermediate product, Wherein the mass ratio of epichlorohydrin and triethylamine is 1:1.

[0051] Add lignin to the intermediate product, the mass ratio of lignin to intermediate product is 1.5:1, adjust the pH value to be alkaline, raise the temperature to 60°C to start the reaction, and obtain the lignin cationic surfactant after 5 hours of reaction, the active ingredient content was 65.4%.

Embodiment 2

[0053] Add trimethylamine under acidic conditions (provided by hydrochloric acid, pH value is 2-3), start the stirring device to react for 20min, then add epichlorohydrin, react for 1.5h, adjust the pH to neutral, continue to react for 4h, and obtain the intermediate product, Wherein the mass ratio of epichlorohydrin and triethylamine is 0.8:1.

[0054] Add lignin to the intermediate product, the mass ratio of lignin to intermediate product is 1:1, adjust the pH value to be alkaline, raise the temperature to 45°C to start the reaction, and obtain the lignin cationic surfactant after 3 hours of reaction, the active ingredient content was 66.7%.

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Abstract

The invention relates to the technical field of antibacterial agents, and provides a lignin cationic surfactant, a preparation method thereof, a long-acting antibacterial agent and a preparation method of the long-acting antibacterial agent. Cheap and easily available natural material lignin is used as a raw material to prepare the surfactant, the obtained lignin cationic surfactant has hydrophilicity and stable performance, and when the lignin cationic surfactant is applied to the antibacterial agent, the wetting and permeation of the antibacterial agent are facilitated, and the coating effectiveness of the antibacterial agent is not influenced. The invention further provides the long-acting antibacterial agent. The long-acting antibacterial agent is prepared from a water-based long-chainsiloxy compound, the lignin cationic surfactant, an alcohol and an organic acid. The obtained antibacterial agent is stable in performance, high in binding force with the surface of a base material,not prone to being washed off, high in sterilization rate, high in sterilization speed and long in protection time, belongs to physical sterilization and is not prone to generating drug resistance.

Description

technical field [0001] The invention relates to the technical field of antibacterial agents, in particular to a lignin cationic surfactant and a preparation method thereof, and a long-acting antibacterial agent and a preparation method thereof. Background technique [0002] There are a large number of pathogenic microorganisms such as bacteria and fungi in the human living environment. Once too many pathogenic microorganisms invade the human body, it will bring serious hidden dangers to human health and serious economic losses. With the development of science and the improvement of human living standards, people's health awareness is constantly strengthening, and antibacterial agents are gradually attracting people's attention. [0003] At present, there are many mature and sold antibacterial agents, such as heavy metal antibacterial agents, chlorobenzene antibacterial agents, small molecule quaternary ammonium salt antibacterial agents, etc. These antibacterial agents have ...

Claims

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Application Information

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IPC IPC(8): B01F17/50A01N55/10A01N25/22A01N25/30A01P1/00A01P3/00C08H7/00C09K23/50
CPCA01N55/00A01N25/22A01N25/30C08H6/00C09K23/16Y02A50/30
Inventor 冉斌盛晓颖廉聪良许文文颜德
Owner 雅思汀娜(北京)科技有限公司
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