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Preparation method of aqueous cutting fluid environment-friendly antibacterial agent

A technology of base metal and cutting fluid, applied in the field of preparation of environment-friendly antibacterial agent of water-based metal cutting fluid, can solve the problems of operator's dermatitis and corrosion of metal, large amount of antibacterial agent, damage to ecological environment, etc. Improved antimicrobial performance, good stability, minimal skin irritation

Inactive Publication Date: 2017-05-17
唐林元
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention: the antibacterial agent used in the existing water-based metal cutting fluid is used in a large amount, which will cause dermatitis and metal corrosion of the operator. Long-term use will cause bacteria to develop drug resistance defects. Provide a natural plant as a source of antibacterial agents, use alkaline lipase to remove the fat, and then ferment it with beneficial bacteria Bacillus natto, supplemented by ethanol Extract flavonoids, saponins and other antibacterial beneficial substances with ammonia water, and obtain natural surface active substances in plants at the same time, so as to obtain the method of water-based metal cutting fluid environment-friendly antibacterial agent. After crushing and sieving, stir and enzymolyze with sodium hydroxide solution and alkaline lipase, filter and freeze, make liquid medium with sterile water, yeast extract, etc., then inoculate Bacillus natto for cultivation and fermentation, and then add Anhydrous ethanol and ammonia water are reacted, after centrifugation, the supernatant is collected and mixed with activated carbon for decolorization, the decolorized solution is collected by rotary evaporation and concentrated in a vacuum, and finally the concentrate is collected to obtain an environmentally friendly antibacterial agent for water-based metal cutting fluid, which is prepared by the present invention The environmentally friendly antibacterial agent has good antibacterial ability, has the advantages of strong compatibility, low odor, non-corrosiveness, and little skin irritation to operators. At the same time, the antibacterial agent is green and environmentally friendly. After use, it will not cause damage to the ecological environment and is sustainable , Effective antibacterial and bactericidal effects, with good application prospects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019]First, in parts by weight, take 40 parts of Bupleurum, 30 parts of Cnidium, 27 parts of Konjac and 4 parts of Sophora flavescens, put them in a 60°C oven and dry them for 3 hours, take out the dry matter and put them in a grinder for crushing, and after 200 Mesh sieve, collect the sieved particles, according to the mass ratio of 1:3, put the sieved particles and the sodium hydroxide solution with a mass fraction of 12% into the enzymolysis tank, stir and mix at 120r / min for 5min; Finally, add alkaline lipase with 6% mass of the above-mentioned sieved particles, set the temperature of the enzymolysis tank at 37°C, stir the enzymolysis at 150r / min for 6h, then filter the enzymolysis mixture in the enzymolysis tank, and use distilled water Wash the filter residue until the washing liquid is neutral, put the washed filter residue in a liquid nitrogen freezer to freeze for 9s, and collect the frozen material; then take 40 parts of sterile water, 22 parts of the above-mentioned...

example 2

[0022] First, in parts by weight, take 43 parts of Bupleurum, 33 parts of Cnidium, 29 parts of Konjac and 4 parts of Sophora flavescens, put them in a 60°C oven and dry them for 5 hours, take out the dry matter and put them in a grinder for crushing, after 200 Mesh sieve, collect the sieved particles, according to the mass ratio of 1:3, put the sieved particles and the sodium hydroxide solution with a mass fraction of 12% into the enzymolysis tank, stir and mix at 120r / min for 8min; Finally, add alkaline lipase with a mass of 7% of the above-mentioned sieved particles, set the temperature of the enzymolysis tank to 42°C, stir the enzymolysis at 150r / min for 7h, then filter the enzymolysis mixture in the enzymolysis tank, and use distilled water Wash the filter residue until the washing liquid is neutral, put the washed filter residue into a liquid nitrogen freezer to freeze for 11 seconds, and collect the frozen material; then, in parts by weight, take 43 parts of sterile water...

example 3

[0025] First, in parts by weight, take 45 parts of Bupleuri, 36 parts of Cnidium, 32 parts of Konjac and 5 parts of Sophora flavescens, put them in an oven at 60°C and dry them for 6 hours, take out the dry matter and put them in a grinder for crushing, after 200 Mesh sieve, collect the sieved particles, according to the mass ratio of 1:3, put the sieved particles and the sodium hydroxide solution with a mass fraction of 12% into the enzymolysis tank, stir and mix at 120r / min for 10min; Finally, add alkaline lipase with 8% mass of the above-mentioned sieved particles, set the temperature of the enzymolysis tank at 48°C, stir the enzymolysis at 150r / min for 8h, then filter the enzymolysis mixture in the enzymolysis tank, and use distilled water Wash the filter residue until the washing liquid is neutral, put the washed filter residue into a liquid nitrogen freezer to freeze for 12 seconds, and collect the frozen material; then, in parts by weight, take 45 parts of sterile water,...

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PUM

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Abstract

The invention discloses a preparation method of an aqueous cutting fluid environment-friendly antibacterial agent, and belongs to the technical field of preparation of cutting fluid additives. The preparation method comprises the following steps: firstly drying Chinese thorowax roots and common cnidium fruits, then performing crushing and screening, and performing stirring with a sodium hydroxide solution and alkaline lipase for enzymolysis; performing filtration and freezing, and then preparing a liquid nutrient medium with sterilized water, a yeast extract and the like; then inoculating bacillus natto to perform culture fermentation; then adding anhydrous ethanol and ammonia water for reaction; performing centrifugation, then collecting supernatant, and mixing the supernatant with activated carbon for decolorization; collecting a decolorized solution, and performing rotary evaporation and vacuum concentration; and finally, collecting a condensate to obtain the aqueous cutting fluid environment-friendly antibacterial agent. The environment-friendly antibacterial agent prepared by the method disclosed by the invention is relatively good in antibacterial ability and has the advantages of strong compatibility, small odor, no corrosiveness and small skin irritation to operators; and meanwhile, the antibacterial agent is green and environment-friendly, cannot cause damages to the ecological environment, and can achieve antibacterial and bactericidal effects continuously and effectively, thereby having relatively good application prospects.

Description

technical field [0001] The invention discloses a preparation method of an environment-friendly antibacterial agent for water-based metal cutting fluid, and belongs to the technical field of preparation of cutting fluid additives. Background technique [0002] In the metal cutting process, in order to improve the cutting efficiency, improve the precision of the workpiece and reduce the surface roughness of the workpiece, prolong the service life of the tool, and achieve the best economic effect, it is necessary to reduce the friction between the tool and the workpiece, the tool and the chip, and timely Take away the heat generated by material deformation in the cutting zone. Metal cutting fluid can play a good role in lubrication, cooling, cleaning and rust prevention, so as to improve tool durability, ensure processing quality and precision, and improve production efficiency. [0003] The currently used metal cutting fluids include oil-based cutting fluids and water-based c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N65/40A01P1/00C10M159/00C10N30/16C10N40/22
CPCA01N65/00A01N65/40C10M159/00C10N2030/16C10N2040/22A01N2300/00
Inventor 唐林元宋家平薛国忠
Owner 唐林元
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