Wormwood oil of the main application

Wormwood Oil had certain inhibitory effect on Staphylococcus aureus, Bacillus subtilis and Escherichia coli, and the order of inhibitory activity was Staphylococcus aureus > and Bacillus subtilis > and Escherichia coli.  The inhibitory activity of Artemisia argyi essential oil against Gram-positive bacteria was stronger than against Gram-negative bacteria.  When the volume fraction of essential oil was only 2.5μL/mL, the growth of S. aureus could be completely inhibited.  The growth of Bacillus subtilis was completely inhibited by the volume fraction of essential oil of 5μL/mL.  

Escherichia coli was relatively insensitive and could not be completely inhibited until the volume fraction of essential oil reached 10μL/mL.  Artemisia argyi essential oil has good UV stability.  Temperature and pH had great effects on the antibacterial activity of Artemisia argyi essential oil. The antibacterial activity was better when the temperature was lower than 40℃, and gradually decreased when the temperature was higher than 40℃.  It can enhance its antibacterial activity under acidic condition.  Chitosan, CaCl2 and NaCl can all increase the antibacterial effect of Artemisia argyi essential oil, but the effect of chitosan and CaCl2 on the antibacterial effect of Artemisia argyi essential oil is greater than that of NaCl.  Mugwort oil is a natural antimicrobial substance extracted from dried leaves of Artemisia argyi. It has broad antibacterial spectrum and strong antimicrobial activity, and has many pharmacological effects, such as anti-inflammatory, hematostatic, hypotensive, hypoglycemic, antiasthmatic and immunomodulatory functions.  Examples of its applications are as follows:  

1) An antimicrobial viscose fiber containing Artemisia argyi oil was prepared. The antimicrobial fiber used Artemisia argyi oil microcapsule as antimicrobial agent, and the spinning liquid was composed of Artemisia argyi oil microcapsule and viscose. The adding proportion of Artemisia argyi oil microcapsule was 10%-30% of the nail fiber in viscose.  The antimicrobial value >4.0, bactericidal value >2.7, and the production method of antimicrobial viscose fiber containing Artemisia argyi oil consists of the following steps: preparation of Artemisia argyi oil emulsion, preparation of Artemisia argyi oil microcapsule, preparation of viscose, preparation of spinning solution and spinning molding.  In addition to retaining the advantages of conventional viscose fiber, such as water absorption, air permeability and comfortable wearing, the antibacterial fiber also has high antibacterial rate, good durability, and good skin care effect, which can be widely used in home textiles, underwear, sweatshirts, etc.  

2) preparation of an antibacterial mugwort oil microcapsules, with gelatin as the first wall emulsion mugwort oil, add water dilute after adjust pH below gelatin isoelectric point, and the adsorption of negatively charged gum Arabic, embryonic form microcapsule, after again after cold jelly, to join in the condensed microcapsule system of crosslinking agent, to chemical crosslinking treatment of microcapsule, microcapsules.  Mugwort oil microcapsule preparation by oil with mugwort basic same antibacterial properties, but the same conditions mugwort oil in place after 30 days almost no antimicrobial properties, and preparation by this invention mugwort oil microcapsules placed in 40 days still have strong antimicrobial properties, achieve the goal of the microcapsules slow release, make the micro capsule has a wider application prospect.  

3) preparation of antibacterial coating, mugwort oil microcapsule coated, preparation of mugwort oil solidified body, and use it to nuclear layer and shell of core-shell emulsion polymerization, core-shell to make use of crosslinking agent of crosslinking, control oil mugwort slow release, nanomaterials, cationic emulsifier was used to avoid the antibacterial effect, the technical problems to be solved is to cladding of mugwort oil,  Artemisia argyi oil solidification body was formed, and the argyi argyi oil solidification body was used in the core layer and shell layer of core-shell acrylate resin. Nanomaterials, cationic emulsifiers and natural antibacterial agents were used to control the slow release of Artemisia argyi oil and improve the antibacterial properties of acrylate resin.