Armoise Oil has certain inhibitory effects on Staphylococcus aureus, Bacillus subtilis, and Escherichia coli. The inhibitory activity of mugwort essential oil against gram-positive bacteria was stronger than that against gram-negative bacteria. When the essential oil volume fraction is only 2.5 μL/mL, the growth of Staphylococcus aureus can be completely inhibited; the essential oil volume fraction of 5 μL/mL can completely inhibit the growth of Bacillus subtilis; while Escherichia coli is relatively insensitive, and the essential oil volume fraction reaches 5 μL/mL. Complete inhibition was achieved at 10 μL/mL. Mugwort essential oil has good UV stability. Temperature and pH had a great influence on the antibacterial effect of mugwort essential oil. The antibacterial activity was better when the temperature was lower than 40℃, and the antibacterial activity gradually decreased when the temperature was higher than 40℃; its antibacterial activity could be enhanced under acidic conditions. Chitosan, CaCl2 and NaCl could increase the antibacterial effect of mugwort essential oil, but chitosan and CaCl2 had more influence on the antibacterial effect of mugwort essential oil than NaCl. Armoise Oil (mugwortoil) is a natural antibacterial substance extracted from the dried leaves of the Compositae plant Mugwort. It has the advantages of broad antibacterial spectrum, strong antibacterial activity, etc. regulation and other pharmacological effects. Examples of its application are as follows:
1) Prepare an antibacterial viscose fiber containing Armoise Oil, the antibacterial fiber uses mugwort oil microcapsules as an antibacterial agent, the spinning solution is composed of mugwort oil microcapsules and viscose, and the addition ratio of mugwort oil microcapsules It is 10%-30% of the methyl fiber in viscose, and its antibacterial index: antibacterial value>4.0, bactericidal value>2.7, a production method of antibacterial viscose fiber containing mugwort oil, comprising the following steps: mugwort oil Preparation of artemisia oil emulsion, preparation of mugwort oil microcapsules, preparation of viscose, preparation of spinning stock solution and spinning molding. The antibacterial fiber not only retains the advantages of water absorption, air permeability and comfortable wearing of the conventional viscose fiber, but also has high antibacterial rate, good durability, and also has a good skin care effect, and can be widely used in home textiles, underwear, sports shirts, etc.
2) Prepare an antibacterial Armoise Oil microcapsule, first emulsify mugwort oil with gelatin as the wall material, dilute with water, adjust the pH value to below the isoelectric point of gelatin, and adsorb with negatively charged gum arabic to form a microcapsule prototype. , and then through low-temperature jelly, adding a cross-linking agent to the above-mentioned coagulation microcapsule system, and chemically cross-linking the microcapsules to obtain microcapsules. The prepared mugwort oil microcapsules have basically the same antibacterial properties as Armoise Oil, but under the same conditions, mugwort oil has almost no antibacterial properties after being placed for 30 days, and the mugwort oil microcapsules prepared by the present invention are still placed after 40 days. It has strong antibacterial properties, achieves the purpose of slow release of microcapsules, and makes microcapsules have wider application prospects.
3) Prepare antibacterial paint, microcapsule Armoise Oil to prepare mugwort oil solidified body, which is used for the core layer and shell layer of core-shell emulsion polymerization, and the core-shell is cross-linked with a cross-linking agent , control the slow release of mugwort oil, and use nanomaterials and cationic emulsifiers to enhance the antibacterial effect. The technical problem to be solved is to coat Armoise Oil to form mugwort oil coagulation, and use mugwort oil coagulation for The core layer and shell layer of the core-shell acrylate resin are combined with nanomaterials, cationic emulsifiers, and natural antibacterial agents to control the slow release of mugwort oil and improve the antibacterial properties of the acrylate resin.
4) Prepare a microcapsule mosquito-repellent incense liquid, use an aqueous gelatin solution and an aqueous gum arabic solution, and mix the two solutions; add Armoise Oil, tetrafluthrin, and walnut green husk extract to the mixed solution obtained in step (1). In the process, the mugwort oil is mixed and dispersed in the above mixed solution to obtain an emulsion; deionized water is added to the emulsion obtained in step (2), and stirred to obtain a diluent; the pH of the diluent obtained in step (3) is obtained. The temperature of the prepolymer solution obtained in step (4) was naturally lowered to 0 to 5°C under stirring, and the temperature was maintained for 40 to 60 minutes to obtain a coagulation solution; the coagulation solution obtained in the step Add 0.5-1 g of soluble starch, 1-2 g of itaconic acid, and 2-5 g of cross-linking curing agent into the liquid, and mix evenly to obtain a microcapsule mosquito-repellent incense liquid. The mosquito-repellent incense liquid has a long-lasting effect and good antibacterial effect.