CN108752688A - A kind of preparation method of antimicrobial form oyster mushroom preservative film - Google Patents
A kind of preparation method of antimicrobial form oyster mushroom preservative film Download PDFInfo
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- CN108752688A CN108752688A CN201810418617.3A CN201810418617A CN108752688A CN 108752688 A CN108752688 A CN 108752688A CN 201810418617 A CN201810418617 A CN 201810418617A CN 108752688 A CN108752688 A CN 108752688A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/14—Surface shaping of articles, e.g. embossing; Apparatus therefor by plasma treatment
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2403/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2403/02—Starch; Degradation products thereof, e.g. dextrin
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
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Abstract
The present invention provides a kind of preparation methods of antimicrobial form oyster mushroom preservative film, include the following steps：(1) tapioca and water is taken to mix, heating stirring dissolving；(2) Polyvinyl alcohol continues to stir；(3) add low density polyethylene (LDPE), antibacterial zeolite particles, medical stone powder, dispersant, sorbierite and white oil, stir evenly；(4) master batch is obtained with double screw extruder extruding pelletization；(5) master batch is blow molded into film；(6) winder cuts film；(7) take nano silicon dioxide, nano-titanium dioxide, silver nitrate, cinnamon essential oil microballoon and water that dispersion liquid is mixed to obtain；(8) dispersion liquid is coated on the film cut；(9) dry；(10) it is handled with corona treatment instrument to obtain the final product.Antimicrobial form oyster mushroom preservative film prepared by this method has good mechanical property, and gas permeability is good, is very suitable for the fresh-keeping of the big food of this respiratory intensity of oyster mushroom, while antibiotic property is good, fine for the inhibition of Escherichia coli.
Description
Technical field
The present invention relates to a kind of preparation methods of antimicrobial form oyster mushroom preservative film.
Background technology
In recent years, with the adjustment of the structure of agricultural production, China's fruits and vegetables production development is very fast, market ample supply and prompt delivery, many fruits and vegetables
Product develops to relative surplus by insufficient supply.Currently, the post-harvest loss rate of China's fruits and vegetables is up to 20%~30%, every year there are about
80000000 tons of fruits and vegetables rot, and cause nearly 80,000,000,000 yuan of economic losses.China's fruits and vegetables rot most important the reason is that fresh-keeping improper.
Therefore, by advanced science and technology, extend the freshness date of fruits and vegetables, and ensure its nutritional quality, be China's fruits and vegetables industry metaplasia
The key of production.For the high fruits and vegetables of respiratory intensity such as oyster mushroom etc., carbon dioxide speed is generated, consumption oxygen is also more.With
When common polythene or Polrvinyl chloride preservative film are packed, gas concentration lwevel will rise rapidly in bag, and oxygen concentration declines rapidly,
Lead to carbon dioxide gas injury or hypoxemia injury because gas concentration lwevel is excessively high or oxygen concentration is too low sometimes.Therefore,
It is badly in need of research and development one kind on the basis of ensureing mechanical strength performance, good permeability, while there is the preservative film of antibacterial effect.
Invention content
Technical problems to be solved：The object of the present invention is to provide a kind of preparation method of antimicrobial form oyster mushroom preservative film, institutes
The antimicrobial form oyster mushroom preservative film of preparation has good mechanical property, and gas permeability is very good, is very suitable for this breathing of oyster mushroom
The big food of intensity it is fresh-keeping, while antibiotic property is good, fine for the inhibition of Escherichia coli.
Technical solution：A kind of preparation method of antimicrobial form oyster mushroom preservative film, ingredient by weight, include the following steps：
(1) 10-20 portions of tapiocas and 30-50 parts of water mixing are taken, 70-80 DEG C of stirring and dissolving is heated to；
(2) 5-10 parts of polyvinyl alcohol are added to continue to stir 10-15min；
(3) be added 40-60 parts of low density polyethylene (LDPE)s, 2-5 parts of antibacterial zeolite particles, 1-2 parts of medical stone powders, 2-5 parts of dispersants, 2-5 parts
Sorbierite and 1-2 parts of white oils, stir evenly；
(4) master batch being obtained with double screw extruder extruding pelletization, area's temperature is 140-145 DEG C, and two area's temperature are 165-170 DEG C,
Three area's temperature are 175-180 DEG C, and four area's temperature are 170-175 DEG C, screw speed 40r/min；
(5) master batch is blow molded into film, area's temperature is 145-150 DEG C, and two area's temperature are 165-170 DEG C, and three area's temperature are
170-175 DEG C, four area's temperature are 155-160 DEG C, screw speed 30r/min；
(6) film is cut into 20cm × 20cm squares by winder；
(7) 10-20 parts of nano silicon dioxides, 5-10 parts of nano-titanium dioxides, 0.5-0.8 parts of silver nitrates, 1-2 parts of cinnamon essential oils are taken
Dispersion liquid is mixed to obtain in microballoon and 80-100 parts of water；
(8) dispersion liquid is coated on the film cut, coating weight 100g/m2；
(9) it is put into baking oven, the dry 1-1.5h at 70-75 DEG C；
(10) use corona treatment instrument in O2It is handled in atmosphere to obtain the final product, processing power 90-100W, processing time is
90-100s。
It is further preferred that the grain size of the antibacterial zeolite particles is 1-20 μm.
It is further preferred that the grain size of the medical stone powder is 1-10 μm.
It is further preferred that the dispersant be odium stearate, calcium stearate, polyethylene glycol or turkey red oil in one kind or
It is several.
It is further preferred that the preparation method of the cinnamon essential oil microballoon：
The first step：2-5 parts of ethyl celluloses are taken, 80% ethyl alcohol of 40-60 parts, stirring and dissolving is added；
Second step：5-10 parts of cinnamon essential oils and 2% glycerine are added, stir；
Third walks：1wt% talcum powder is added, is stirred evenly；
4th step：It is spray-dried to obtain the final product, charging rate 3mL/min, inlet air temperature is 100 DEG C, atomizing pressure 100kPa.
Advantageous effect：
1. medical stone be it is a kind of to biological nontoxic, it is harmless and with certain bioactivity natural complex ore, as filler, no
The gas permeability of preservative film can only be improved, moreover it is possible to necessary trace element be provided, while there is certain antibiotic property.
2. prepare preservative film with corona treatment instrument, it can make that fresh-keeping membrane superficial tissue is uniform, pin-free, Simultaneous Stabilization
It is good.
3. there is the antimicrobial form oyster mushroom preservative film prepared by the present invention good mechanical property, tensile strength to be up to 19.50MPa,
Gas permeability is very good, and oxygen permeability coefficient is up to 3.59 × 10-13(cm3·cm)/(cm2SPa), it is very suitable for that oyster mushroom is this to exhale
The fresh-keeping of the big food of intensity is inhaled, while antibiotic property is good, it is fine for the inhibition of Escherichia coli.
Specific implementation mode
Embodiment 1
A kind of preparation method of antimicrobial form oyster mushroom preservative film, ingredient by weight, include the following steps：
(1) 10 portions of tapiocas and 30 parts of water mixing are taken, 70 DEG C of stirring and dissolvings are heated to；
(2) 5 parts of polyvinyl alcohol are added to continue to stir 10min；
(3) 40 parts of low density polyethylene (LDPE)s, 2 parts of antibacterial zeolite particles, 1 part of medical stone powder, 2 parts of calcium stearates, 2 parts of sorbierites and 1 are added
Part white oil, stirs evenly；
(4) master batch is obtained with double screw extruder extruding pelletization, area's temperature is 140 DEG C, and two area's temperature are 165 DEG C, three area's temperature
It it is 175 DEG C, four area's temperature are 170 DEG C, screw speed 40r/min；
(5) master batch is blow molded into film, area's temperature is 145 DEG C, and two area's temperature are 165 DEG C, and three area's temperature are 170 DEG C, 4th area
Temperature is 155 DEG C, screw speed 30r/min；
(6) film is cut into 20cm × 20cm squares by winder；
(7) 10 parts of nano silicon dioxides, 5 parts of nano-titanium dioxides, 0.5 part of silver nitrate, 1 part of cinnamon essential oil microballoon and 80 parts of water are taken
Dispersion liquid is mixed to obtain；
(8) dispersion liquid is coated on the film cut, coating weight 100g/m2；
(9) it is put into baking oven, the dry 1h at 70 DEG C；
(10) use corona treatment instrument in O2It is handled in atmosphere to obtain the final product, processing power 90W, processing time 90s.
Embodiment 2
A kind of preparation method of antimicrobial form oyster mushroom preservative film, ingredient by weight, include the following steps：
(1) 15 portions of tapiocas and 40 parts of water mixing are taken, 75 DEG C of stirring and dissolvings are heated to；
(2) 8 parts of polyvinyl alcohol are added to continue to stir 13min；
(3) 50 parts of low density polyethylene (LDPE)s, 4 parts of antibacterial zeolite particles, 1.5 parts of medical stone powders, 4 parts of turkey red oils, 3 parts of sorbierites are added
With 1.5 parts of white oils, stir evenly；
(4) master batch is obtained with double screw extruder extruding pelletization, area's temperature is 145 DEG C, and two area's temperature are 170 DEG C, three area's temperature
It it is 175 DEG C, four area's temperature are 170 DEG C, screw speed 40r/min；
(5) master batch is blow molded into film, area's temperature is 145 DEG C, and two area's temperature are 165 DEG C, and three area's temperature are 170 DEG C, 4th area
Temperature is 155 DEG C, screw speed 30r/min；
(6) film is cut into 20cm × 20cm squares by winder；
(7) 15 parts of nano silicon dioxides, 8 parts of nano-titanium dioxides, 0.7 part of silver nitrate, 1.5 parts of cinnamon essential oil microballoons and 90 parts are taken
Dispersion liquid is mixed to obtain in water；
(8) dispersion liquid is coated on the film cut, coating weight 100g/m2；
(9) it is put into baking oven, the dry 1.5h at 70 DEG C；
(10) use corona treatment instrument in O2It is handled in atmosphere to obtain the final product, processing power 95W, processing time 95s.
Embodiment 3
A kind of preparation method of antimicrobial form oyster mushroom preservative film, ingredient by weight, include the following steps：
(1) 20 portions of tapiocas and 50 parts of water mixing are taken, 80 DEG C of stirring and dissolvings are heated to；
(2) 10 parts of polyvinyl alcohol are added to continue to stir 15min；
(3) 60 parts of low density polyethylene (LDPE)s of addition, 5 parts of antibacterial zeolite particles, 2 parts of medical stone powders, 5 parts of dispersants, 5 parts of sorbierites and 2 parts
White oil stirs evenly；
(4) master batch is obtained with double screw extruder extruding pelletization, area's temperature is 145 DEG C, and two area's temperature are 170 DEG C, three area's temperature
It it is 180 DEG C, four area's temperature are 175 DEG C, screw speed 40r/min；
(5) master batch is blow molded into film, area's temperature is 150 DEG C, and two area's temperature are 170 DEG C, and three area's temperature are 175 DEG C, 4th area
Temperature is 160 DEG C, screw speed 30r/min；
(6) film is cut into 20cm × 20cm squares by winder；
(7) 20 parts of nano silicon dioxides, 10 parts of nano-titanium dioxides, 0.8 part of silver nitrate, 2 parts of cinnamon essential oil microballoons and 100 parts are taken
Dispersion liquid is mixed to obtain in water；
(8) dispersion liquid is coated on the film cut, coating weight 100g/m2；
(9) it is put into baking oven, the dry 1.5h at 75 DEG C；
(10) use corona treatment instrument in O2It is handled in atmosphere to obtain the final product, processing power 100W, processing time 100s.
Comparative example 1
The present embodiment is with embodiment 1 the difference is that replacing tapioca with polyvinyl alcohol, specially：
A kind of preparation method of antimicrobial form oyster mushroom preservative film, ingredient by weight, include the following steps：
(1) 25 parts of polyvinyl alcohol are taken, 40 parts of low density polyethylene (LDPE)s, 2 parts of antibacterial zeolite particles, 1 part of medical stone powder, 2 parts of stearic acid are added
Calcium, 2 parts of sorbierites and 1 part of white oil, stir evenly；
(2) master batch is obtained with double screw extruder extruding pelletization, area's temperature is 140 DEG C, and two area's temperature are 165 DEG C, three area's temperature
It it is 175 DEG C, four area's temperature are 170 DEG C, screw speed 40r/min；
(3) master batch is blow molded into film, area's temperature is 145 DEG C, and two area's temperature are 165 DEG C, and three area's temperature are 170 DEG C, 4th area
Temperature is 155 DEG C, screw speed 30r/min；
(4) film is cut into 20cm × 20cm squares by winder；
(5) 10 parts of nano silicon dioxides, 5 parts of nano-titanium dioxides, 0.5 part of silver nitrate, 1 part of cinnamon essential oil microballoon and 80 parts of water are taken
Dispersion liquid is mixed to obtain；
(6) dispersion liquid is coated on the film cut, coating weight 100g/m2；
(7) it is put into baking oven, the dry 1h at 70 DEG C；
(8) use corona treatment instrument in O2It is handled in atmosphere to obtain the final product, processing power 90W, processing time 90s.
Comparative example 2
The present embodiment is with embodiment 1 the difference is that replacing medical stone powder with antibacterial zeolite particles, specially：
A kind of preparation method of antimicrobial form oyster mushroom preservative film, ingredient by weight, include the following steps：
(1) 10 portions of tapiocas and 30 parts of water mixing are taken, 70 DEG C of stirring and dissolvings are heated to；
(2) 5 parts of polyvinyl alcohol are added to continue to stir 10min；
(3) 40 parts of low density polyethylene (LDPE)s, 3 parts of antibacterial zeolite particles, 2 parts of calcium stearates, 2 parts of sorbierites and 1 part of white oil is added, stirring is equal
It is even；
(4) master batch is obtained with double screw extruder extruding pelletization, area's temperature is 140 DEG C, and two area's temperature are 165 DEG C, three area's temperature
It it is 175 DEG C, four area's temperature are 170 DEG C, screw speed 40r/min；
(5) master batch is blow molded into film, area's temperature is 145 DEG C, and two area's temperature are 165 DEG C, and three area's temperature are 170 DEG C, 4th area
Temperature is 155 DEG C, screw speed 30r/min；
(6) film is cut into 20cm × 20cm squares by winder；
(7) 10 parts of nano silicon dioxides, 5 parts of nano-titanium dioxides, 0.5 part of silver nitrate, 1 part of cinnamon essential oil microballoon and 80 parts of water are taken
Dispersion liquid is mixed to obtain；
(8) dispersion liquid is coated on the film cut, coating weight 100g/m2；
(9) it is put into baking oven, the dry 1h at 70 DEG C；
(10) use corona treatment instrument in O2It is handled in atmosphere to obtain the final product, processing power 90W, processing time 90s.
Comparative example 3
The present embodiment is with embodiment 1 the difference is that replacing nano-titanium dioxide with nano silicon dioxide, specially：
A kind of preparation method of antimicrobial form oyster mushroom preservative film, ingredient by weight, include the following steps：
(1) 10 portions of tapiocas and 30 parts of water mixing are taken, 70 DEG C of stirring and dissolvings are heated to；
(2) 5 parts of polyvinyl alcohol are added to continue to stir 10min；
(3) 40 parts of low density polyethylene (LDPE)s, 2 parts of antibacterial zeolite particles, 1 part of medical stone powder, 2 parts of calcium stearates, 2 parts of sorbierites and 1 are added
Part white oil, stirs evenly；
(4) master batch is obtained with double screw extruder extruding pelletization, area's temperature is 140 DEG C, and two area's temperature are 165 DEG C, three area's temperature
It it is 175 DEG C, four area's temperature are 170 DEG C, screw speed 40r/min；
(5) master batch is blow molded into film, area's temperature is 145 DEG C, and two area's temperature are 165 DEG C, and three area's temperature are 170 DEG C, 4th area
Temperature is 155 DEG C, screw speed 30r/min；
(6) film is cut into 20cm × 20cm squares by winder；
(7) take 15 parts of nano silicon dioxides, 0.5 part of silver nitrate, 1 part of cinnamon essential oil microballoon and 80 parts of water that dispersion is mixed to obtain
Liquid；
(8) dispersion liquid is coated on the film cut, coating weight 100g/m2；
(9) it is put into baking oven, the dry 1h at 70 DEG C；
(10) use corona treatment instrument in O2It is handled in atmosphere to obtain the final product, processing power 90W, processing time 90s.
The measurement of biocidal property：Preservative film is measured to the inhibition for trying bacterium using filter paper inhibition zone method, will be accessed for examination bacterium
In aseptic liquid nutrient medium, in 37 DEG C, the constant-temperature table of 120r/min activation cultivate for 24 hours.Draw the bacterium after part activation
In kind liquid access sterile water, fully 10 are made after oscillation7The initial bacterium solution of cfu/m L.
Sterilized LB solid mediums are placed at room temperature, is cooled to after preference temperature down to sterile petri dish, waits cultivating
It is spare after base solidification.It draws the initial bacterium solutions of 0.1mL and is seeded to LB culture mediums, disperseed bacterium solution with sterilized glass spreading rod
It is even.It takes 1g preservative films to be dissolved in 10ml deionized waters, takes 10uL preservative films drop in the aseptic filter paper on piece of a diameter of 6mm, use
Tweezers drain filter paper in superclean bench, and the filter paper of sterile water is added dropwise as a contrast.Then it is affixed on containing for trying bacterium
Culture medium on, tablet back-off be positioned over temperature be in 37 DEG C of incubator for 24 hours.After culture, antibacterial circle diameter uses
Vernier caliper measures.
The mechanical property of 1 antimicrobial form oyster mushroom preservative film of table
There is antimicrobial form oyster mushroom preservative film prepared by the method for the present invention good mechanical property, tensile strength to be up to
19.50MPa, gas permeability is very good, and oxygen permeability coefficient is up to 3.59 × 10-13(cm3·cm)/(cm2SPa), it is very suitable for
The big food of this respiratory intensity of oyster mushroom it is fresh-keeping, while antibiotic property is good, fine for the inhibition of Escherichia coli.
Claims (5)
1. a kind of preparation method of antimicrobial form oyster mushroom preservative film, it is characterised in that：Ingredient by weight, includes the following steps：
(1) 10-20 portions of tapiocas and 30-50 parts of water mixing are taken, 70-80 DEG C of stirring and dissolving is heated to；
(2) 5-10 parts of polyvinyl alcohol are added to continue to stir 10-15min；
(3) be added 40-60 parts of low density polyethylene (LDPE)s, 2-5 parts of antibacterial zeolite particles, 1-2 parts of medical stone powders, 2-5 parts of dispersants, 2-5 parts
Sorbierite and 1-2 parts of white oils, stir evenly；
(4) master batch being obtained with double screw extruder extruding pelletization, area's temperature is 140-145 DEG C, and two area's temperature are 165-170 DEG C,
Three area's temperature are 175-180 DEG C, and four area's temperature are 170-175 DEG C, screw speed 40r/min；
(5) master batch is blow molded into film, area's temperature is 145-150 DEG C, and two area's temperature are 165-170 DEG C, and three area's temperature are
170-175 DEG C, four area's temperature are 155-160 DEG C, screw speed 30r/min；
(6) film is cut into 20cm × 20cm squares by winder；
(7) 10-20 parts of nano silicon dioxides, 5-10 parts of nano-titanium dioxides, 0.5-0.8 parts of silver nitrates, 1-2 parts of cinnamon essential oils are taken
Dispersion liquid is mixed to obtain in microballoon and 80-100 parts of water；
(8) dispersion liquid is coated on the film cut, coating weight 100g/m2；
(9) it is put into baking oven, the dry 1-1.5h at 70-75 DEG C；
(10) use corona treatment instrument in O2It is handled in atmosphere to obtain the final product, processing power 90-100W, processing time 90-
100s。
2. a kind of preparation method of environment-friendly type refrigeration packaging material according to claim 1, it is characterised in that：The antibacterial
The grain size of zeolite is 1-20 μm.
3. a kind of preparation method of antimicrobial form oyster mushroom preservative film according to claim 1, it is characterised in that：The medical stone
The grain size of powder is 1-10 μm.
4. a kind of preparation method of antimicrobial form oyster mushroom preservative film according to claim 1, it is characterised in that：The dispersant
For one or more of odium stearate, calcium stearate, polyethylene glycol or turkey red oil.
5. a kind of preparation method of antimicrobial form oyster mushroom preservative film according to claim 1, it is characterised in that：The cinnamon spirit
The preparation method of oily microballoon：
The first step：2-5 parts of ethyl celluloses are taken, 80% ethyl alcohol of 40-60 parts, stirring and dissolving is added；
Second step：5-10 parts of cinnamon essential oils and 2% glycerine are added, stir；
Third walks：1wt% talcum powder is added, is stirred evenly；
4th step：It is spray-dried to obtain the final product, charging rate 3mL/min, inlet air temperature is 100 DEG C, atomizing pressure 100kPa.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111758502A (en) * | 2019-04-02 | 2020-10-13 | 任岛峰 | Production method of fungus bag capable of converting organic matters into edible fungi food |
| CN112674160A (en) * | 2019-10-18 | 2021-04-20 | 海南中商馥香源农产品配送有限公司 | Special negative ion fresh-keeping agent for fruits and vegetables and fresh-keeping method thereof |
| CN112978081A (en) * | 2021-02-26 | 2021-06-18 | 莱阳诚丰食品有限公司 | Fruit and vegetable preservative film and preparation method and application thereof |
| CN117700910A (en) * | 2023-12-13 | 2024-03-15 | 普宁市康特伦实业有限公司 | Antibacterial environment-friendly PVA material and preparation method thereof |
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