CN107439542A - A kind of natural plant essential oils microcapsules and preparation method and application - Google Patents
A kind of natural plant essential oils microcapsules and preparation method and application Download PDFInfo
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/26—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests in coated particulate form
- A01N25/28—Microcapsules or nanocapsules
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
- A01N65/40—Liliopsida [monocotyledons]
- A01N65/44—Poaceae or Gramineae [Grass family], e.g. bamboo, lemon grass or citronella grass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
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Abstract
The invention belongs to mosquito-repellent field, and in particular to a kind of natural plant essential oils microcapsules and preparation method and application.The natural plant essential oils microcapsules, including capsule-core and cyst wall, the capsule-core are plants essential oil compound, and the plants essential oil compound includes oil of Cymbopogon winterianus, lemon, eucalyptus leaf essential oil, Peppermint essential oil, cinnamomum camphora essential oil and schizonepeta essential oil.The preparation method includes successively：The preparation of capsule-core, the preparation of cyst wall, microencapsulation and post processing.The application is the application in culicifuge.Technical scheme makes the plants essential oil of compounding realize microencapsulation, essential oil is slowly discharged, and does not influence repelling effect while extending usage time, realizes greatly improving for plants essential oil utilization rate.Under normal usage can be 36 months with sustained release, and the mosquito in the range of 3 meters is effectively driven, fragrant is naturally, with clear refreshing restoring consciouness effect.
Description
Technical field
The invention belongs to mosquito-repellent field, and in particular to a kind of natural plant essential oils microcapsules and preparation method and should
With.
Background technology
As Global Greenhouse Effect constantly raises and environmental degradation, the World Health Organization (WHO) think mosquito to the mankind
Health especially child's health, which will produce, further to be influenceed, and mosquito is one of important channel for propagating a variety of diseases, such as malaria
Disease, encephalitis B, dengue fever, yellow fever, filariasis etc. disease are all by caused by bite by mosquitos.The whole world have half with
On people live among the threat that disease is passed by mosquito.In daily life, conventional repellant prevents bite by mosquitos.Repellent
Agent refers to certain special odor that can be volatilized naturally, the chemical substance for making insect produce repellent after smelling and dare not approach.Insect
Repellant can make people, animal from insect bites and invasion and attack, prevent insect-borne diseases within a certain period of time in itself without insecticidal action
Occur.
Repellant is divided into chemical synthesis repellant and plant-originated repellent.Current most popular chemical repellant is to keep away
Mosquito amine [DEET, DEET], Yi Moning [IR3535,3- (N- normal-butyls acetamido)-propionic acid
Ethyl ester], [KBR3023,2- (2- ethoxys)-piperidines -1- carbonic acid -1- methyl isopropyl esters, artificial synthesized repellant have Icaridin
Efficiently, the advantages that effective mosquito repellent time is long, the favor of people is enjoyed.But in recent years DEET be constantly reported to human body have it is negative
Effect, environment is harmful to.French Corbel etc. (2009) researchs show that DEET is to insect and mammalian central nervous system second
The activity of acetylcholinesterase has inhibitory action.When DEET is with Carbamates Mixture Use of Insecticides, toxicity enhancing (Moss
1996) serious threat, is produced to the safety of the mankind.
As people use mosquito-repellent to health and ecological environment growing interest, especially people, it is more required
It is safe to the human body.The mankind have nearly one thousand years with the history of plant and extract repellent harmful insect, because its source is naturally to human body
Safety, is still being used so far.For example citronella oil was just proposed as insect repellent use early in 1908, lemongrass is U.S. elder brother
The plant component commonly used in worm repellent preparation, the candle with anthelmintic action and stacte product of market sale all contain citronella oil.
At present, plant-originated repellent active ingredient is plants essential oil, is made up of chemical moleculars such as terpenes, aldehydes, esters, alcohols, is planted
Thing essential oil has the characteristics that low toxicity, low-residual, good with environment compatibility.But plants essential oil is because molecular weight is small, volatile, there are
Imitate duration short deficiency.
The content of the invention
The invention provides a kind of natural plant essential oils microcapsules and preparation method and application, to solve currently as drive
Keep away the problem of plants essential oil that agent uses is volatile, and effective time is short.
In order to solve the above-mentioned technical problem, the technical scheme is that：The natural plant essential oils microcapsules, including capsule
Core and cyst wall, the capsule-core are plants essential oil compound, and the plants essential oil compound includes oil of Cymbopogon winterianus, lemon, eucalyptus
Leaf essential oil, Peppermint essential oil, cinnamomum camphora essential oil and schizonepeta essential oil.
Microcapsules are using high polymer material as cyst wall or cyst membrane, and by physics, chemically or physically chemical method will be used as
The active material (solid, liquid or gas) of capsule-core wraps up, formed it is a kind of have the spherical of semipermeability cyst membrane, kidney shape,
The microencapsulation of the particular geometric configurations such as grain shape, its size in several microns to hundreds of micrometer ranges (diameter typically 5~
200 μm), the thickness of shell is 0.2~10 μm.This core-shell structure makes microcapsules have protection, barrier, makes by shell protection
Core material will not both be influenceed by external environment, while have the characteristic slowly outwardly escaped again.
The chemical composition of plants essential oil is extremely complex, and the derived essential oil of different plants or same plant different parts also has difference
It is different.The chemical composition of plants essential oil is generally divided into terpenoid, aromatic compound, aliphatic compound and nitrogenous Containing Sulfur
The class of compound four.Terpenoid is the main component of essential oil, can be divided into three classes again according to its basic structure：Monoterpene derivative is such as fragrant
Leaf-alcohol (geraniol), menthol (menthol), camphor (camphor) etc.；Sesquiterpene derivative such as farnesene
(farnesene), germacrone (germacrone), wide flower bud ketone musk (pogostone) etc.；Forskolin, such as taxol
(taxol) etc..In essential oil, aromatic compound is the second major class compound next in number only to terpene compound, wherein
One kind is terpene source derivative, such as hundred inner careless phenol (thymol), cumin alkene (p-cymene), α-curcumene (α-curcumene)
Deng；Another kind of is phenylpropyl alcohol alkane derivative, and the essential oil for mainly containing this kind of compound is used as spicy spices on perfume industry,
Such as the cinnaldehydrum (cinnamaldehyde) in cassia bark, anisole (anethole) in oil of badian etc..Aliphatic compound
If the compound of some small molecules of owner, being almost present in all essential oils, its less content is not its main component, such as
Isopentyl aldehyde (isovaleraldehyde) in the essential oils such as orange, lemon, peppermint, folium eucalypti, lemongrass, in Seabuckthorn Oil, osmanthus essential oil
Ethyl acetate (ethylacetate) etc..
Further, the content of meter in parts by weight of the plants essential oil compound each component is as follows：
Further, the plants essential oil compound also includes synergist：2-4 parts Lavender and 2-4 part cinnamon spirits
Oil.
The present invention further extends mosquito repellent time and repelling effect by the synergist of compounding.
Further, the material of the cyst wall is gelatin-acacia complexes, beta-schardinger dextrin or Lauxite.
Further, the natural plant essential oils microcapsules are the powder that particle diameter is 1-10 μm, 1-5 μm of preferable particle size.
Present invention also offers the preparation method of above-mentioned natural plant essential oils microcapsules, comprise the following steps:
1) preparation of capsule-core：Essential oil compound is added in essential oil complex solvent, then adds synergist heating mixing
Uniformly, oil phase, oil phase is mixed with water, stirring to obtain capsule-core liquid are formed；
2) preparation of cyst wall：The material of cyst wall is disperseed to acquisition cyst wall liquid in dispersed phase；
3) microencapsulation：The capsule-core liquid that step 1) obtains is added in the cyst wall liquid of step 2) acquisition, cyst material exists
Capsule-core surface attachment simultaneously wraps up solidification, obtains microcapsule suspensions；
4) post-process：The microcapsule suspensions of step 3) are filtered, wash, obtain powdered natural plant essential oils after drying
Microcapsules.
Further, in step 1), the essential oil complex solvent is selected from polyethylene glycol or vegetable oil, preferably soybean oil, institute
State aqueous phase and be selected from ethanol or dichloromethane.
Further, in step 1), the volume ratio of the aqueous phase and oil phase is 1:1.
Present invention also offers above-mentioned natural plant essential oils microcapsules to apply in culicifuge.
Further, the formulation of the culicifuge is solid, liquid or paste.Microcapsules are prepared into a variety of formulations to belong to
Prior art, refer to prior art acquisition.
Microcapsules technology be high polymer material structure, size micron dimension hollow vesicle, have reduce volatility
The advantages of, technical scheme makes the plants essential oil of compounding realize microencapsulation, essential oil is slowly discharged, and extending makes
Repelling effect is not influenceed while with the time, realizes greatly improving for plants essential oil utilization rate.Under normal usage may be used
With sustained release 6 months, and the mosquito in the range of 3 meters is effectively driven, fragrant is naturally, with clear refreshing restoring consciouness effect.
Brief description of the drawings
Fig. 1 is the electromicroscopic photograph of natural plant essential oils microcapsules prepared by embodiment 1；
Fig. 2 is the electromicroscopic photograph of natural plant essential oils microcapsules prepared by embodiment 2；
Fig. 3 is the electromicroscopic photograph of natural plant essential oils microcapsules prepared by embodiment 3.
Embodiment
In order to make it easy to understand, illustrate the natural plant essential oils microcapsules and preparation method with reference to embodiment and answer
With, it should be appreciated that these embodiments are only illustrative of the invention and is not intended to limit the scope of the invention.
Reagent used in the present invention is commercial goods.
The beta-schardinger dextrin of embodiment 1 prepares natural plant essential oils microcapsules
1) preparation of capsule-core：
Essential oil compound is included to the component of weight part ratio as shown in table 1, weighed accordingly；
The each component weight proportion of table 1
| Sequence number | Material name | Parts by weight (part) |
| 1 | Lemon | 15 |
| 2 | Oil of Cymbopogon winterianus | 10 |
| 3 | Peppermint essential oil | 15 |
| 4 | Schizonepeta essential oil | 10 |
| 5 | Cinnamomum camphora essential oil | 8 |
| 6 | Eucalyptus leaf essential oil | 2 |
| 7 | Lavender | 4 |
| 8 | Cinnamon essential oil | 2 |
| 9 | Soybean oil | 45 |
First the first six component is dispersed in soybean oil, synergist Lavender and cinnamon essential oil is then added, slowly adds
Heat, to transparent clarification, by a certain percentage, the essential oil compound of preparation is put into beaker to 50-70 DEG C, is added while stirring
Enter, after stirring, allow its natural cooling, obtain Synergistic complex i.e. oil phase；
Capsule-core liquid is obtained by 5ml oil phases and 5ml ethanol mixed configuration；
2) preparation of cyst wall
5g beta-schardinger dextrins are weighed, add distilled water 200ml to stir, 60 DEG C of heating water baths are completely dissolved it, Ran Houjia
Enter 2ml Tween 80s and 2ml Spans 80 are used as emulsifying agent, high-speed stirred, obtain cyst wall liquid；
3) microencapsulation
Cyst wall liquid is stirred below in 30-100rad/s mixing speed, while the capsule-core liquid of step 1) is slowly added to, after adding
Continue to stir 2h, obtain microcapsule suspensions；
4) post-process
The microcapsule suspensions of step 3) are placed in 4 DEG C of cooling 12-24 hours, then filtered at 4 DEG C, filter cake is at 60 DEG C
Under the conditions of be dried in vacuo 12 hours, obtain powdered natural plant essential oils microcapsules as shown in Figure 1, particle diameter is about 5 μm.
The Lauxite of embodiment 2 prepares natural plant essential oils microcapsules
1) preparation of capsule-core：
Essential oil compound is included to the component of weight part ratio as shown in table 2, weighed accordingly；
The each component weight proportion of table 2
| Sequence number | Material name | Parts by weight (part) |
| 1 | Lemon | 12 |
| 2 | Oil of Cymbopogon winterianus | 12 |
| 3 | Peppermint essential oil | 12 |
| 4 | Schizonepeta essential oil | 12 |
| 5 | Cinnamomum camphora essential oil | 5 |
| 6 | Eucalyptus leaf essential oil | 4 |
| 7 | Lavender | 2 |
| 8 | Cinnamon essential oil | 4 |
| 9 | Soybean oil | 36 |
First the first six component is dispersed in soybean oil, synergist Lavender and cinnamon essential oil is then added, slowly adds
Heat, to transparent clarification, by a certain percentage, the essential oil compound of preparation is put into beaker to 50-70 DEG C, is added while stirring
Enter, after stirring, allow its natural cooling, obtain Synergistic complex i.e. oil phase；
Capsule-core liquid is obtained by 5ml oil phases and 5ml dichloromethane mixed configuration；
2) preparation of cyst wall
Weigh 10ml Lauxites to be added in 50ml water, add 2ml Tween 80s and 2ml Spans 80 are used as emulsifying agent,
Emulsified under high-rate of shear, obtain cyst wall liquid；
3) microencapsulation
Under 500-1000r/min rotating speeds, the capsule-core liquid of step 1) is slowly added into the cyst wall liquid of step 2), Bian Jia
Enter side stirring, persistently stir 20 minutes, obtain uniform and stable emulsion system, salt is slowly added to after rotating speed is down to 100r/min
Acid solution adjusts pH value to 2.0, is warming up to 65 DEG C of curing reactions 1 hour, during terminal with sodium hydrate aqueous solution adjust pH value to
7.0, obtain microcapsule suspensions；
4) post-process
The microcapsule suspensions of step 3) are filtered, washs and dries, obtain powdered natural plant essential oils as shown in Figure 2
Microcapsules, as shown in Fig. 2 about 3 μm of particle diameter.
The gelatin-Arabic gum of embodiment 3 prepares natural plant essential oils microcapsules
1) preparation of capsule-core：
Essential oil compound is included to the component of weight part ratio as shown in table 3, weighed accordingly；
The each component weight proportion of table 3
| Sequence number | Material name | Parts by weight (part) |
| 1 | Lemon | 14 |
| 2 | Oil of Cymbopogon winterianus | 11 |
| 3 | Peppermint essential oil | 13 |
| 4 | Schizonepeta essential oil | 11 |
| 5 | Cinnamomum camphora essential oil | 7 |
| 6 | Eucalyptus leaf essential oil | 3 |
| 7 | Lavender | 3 |
| 8 | Cinnamon essential oil | 3 |
| 9 | Soybean oil | 40 |
First the first six component is dispersed in soybean oil, synergist Lavender and cinnamon essential oil is then added, slowly adds
Heat, to transparent clarification, by a certain percentage, the essential oil compound of preparation is put into beaker to 50-70 DEG C, is added while stirring
Enter, after stirring, allow its natural cooling, obtain Synergistic complex i.e. oil phase；
Capsule-core liquid is obtained by 5ml oil phases and 5ml dichloromethane mixed configuration；
2) cyst wall and microencapsulation
In 40 DEG C of water-baths, the capsule-core liquid for measuring 2ml steps 1) is slowly added into 40ml aqueous gelatin solutions, the gelatin
Concentration of aqueous solution is 1.5%, is stirred while adding, and is then stirred 10 minutes under high speed emulsification cutter 9000-12000rpm,
Then 40ml Arabic gum aqueous solution and 40ml distilled water is added dropwise successively respectively, the Arabic gum aqueous solution
Concentration is 1.5%, is stirred 10 minutes after being added dropwise, and is cooled to 10 DEG C, adds sodium hydrate aqueous solution and adjusts pH value to 8-9, hydrogen
The concentration of aqueous solution of sodium oxide is 10%, then adds the solidification of 1ml glutaraldehyde water solutions, and the concentration of the glutaraldehyde water solution is
25%, obtain microcapsule suspensions；
3) post-process
The microcapsule suspensions of step 2) are filtered, washs and dries, obtain powdered natural plant essential oils as shown in Figure 3
Microcapsules, about 1 μm of particle diameter.
Comparative example 1
Difference with embodiment 1 is, only mixes each component composition by plants essential oil compound, does not carry out micro-
It is encapsulated.
Comparative example 2
Difference with embodiment 1 is that each component weight proportion is as shown in table 4：
The each component weight proportion of table 4
| Sequence number | Material name | Parts by weight (part) |
| 1 | Lemon | 25 |
| 2 | Oil of Cymbopogon winterianus | 30 |
| 3 | Peppermint essential oil | 0 |
| 4 | Schizonepeta essential oil | 0 |
| 5 | Cinnamomum camphora essential oil | 0 |
| 6 | Eucalyptus leaf essential oil | 0 |
| 7 | Lavender | 0 |
| 8 | Cinnamon essential oil | 0 |
| 9 | Soybean oil | 45 |
The effect experiment of embodiment 5
Experimental white mouse, mosquito and test sample are placed in and cultivated in cage, then will cultivate cage with Polythene Bag and wrap up
Come, test sample is respectively embodiment 1-3, and the species of comparative example 1-2 culicifuge, wherein mosquito includes：It is Culex quinquefasciatus, big bad
Anopheles, anopheles darlingi, Aedes aegypti and Culex pipiens pallens, mosquito sum are 20, observe mosquito repellent scope, displacement is added per two weeks
A collection of mosquito, experimental data are as shown in table 5：
The mosquito repellent experimental result of table 5
Claims (10)
1. a kind of natural plant essential oils microcapsules, it is characterised in that including capsule-core and cyst wall, the capsule-core is plants essential oil
Compound, the plants essential oil compound include oil of Cymbopogon winterianus, lemon, eucalyptus leaf essential oil, Peppermint essential oil, cinnamomum camphora essential oil and chaste tree
Mustard essential oil.
A kind of 2. natural plant essential oils microcapsules according to claim 1, it is characterised in that the plants essential oil compounding
The content of meter in parts by weight of thing each component is as follows：
A kind of 3. natural plant essential oils microcapsules according to claim 2, it is characterised in that the plants essential oil compounding
Thing also includes synergist：2-4 parts Lavender and 2-4 part cinnamon essential oils.
4. a kind of natural plant essential oils microcapsules according to claim 1, it is characterised in that the material of the cyst wall is
Gelatin-acacia complexes, beta-schardinger dextrin or Lauxite.
A kind of 5. natural plant essential oils microcapsules according to claim 1, it is characterised in that the natural plant essential oils
Microcapsules are the powder that particle diameter is 1-10 μm, 1-5 μm of preferable particle size.
6. the preparation method of any natural plant essential oils microcapsules of claim 1-5, it is characterised in that including following step
Suddenly：
1) preparation of capsule-core：Essential oil compound is added in essential oil complex solvent, synergist heating is then added and is well mixed,
Form oil phase, oil phase is mixed with water, stirring to obtain capsule-core liquid；
2) preparation of cyst wall：The material of cyst wall is disperseed to acquisition cyst wall liquid in dispersed phase；
3) microencapsulation：The capsule-core liquid that step 1) obtains is added in the cyst wall liquid of step 2) acquisition, cyst material is in capsule-core
Surface attachment simultaneously wraps up solidification, obtains microcapsule suspensions；
4) post-process：The microcapsule suspensions of step 3) are filtered, wash, obtain the micro- glue of powdered natural plant essential oils after drying
Capsule.
7. preparation method according to claim 6, it is characterised in that in step 1), the essential oil complex solvent is selected from poly- second
Glycol or vegetable oil, preferably soybean oil, the aqueous phase are selected from ethanol or dichloromethane.
8. preparation method according to claim 6, it is characterised in that in step 1), the volume ratio of the aqueous phase and oil phase is
1:1。
9. application of any natural plant essential oils microcapsules of claim 1-5 in culicifuge.
10. apply according to claim 8, it is characterised in that the formulation of the culicifuge is solid, liquid or paste.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108402092A (en) * | 2018-03-30 | 2018-08-17 | 王敏 | A kind of toughness embedding slow-release mosquito-repellent incense |
| CN108967535A (en) * | 2018-08-02 | 2018-12-11 | 青岛农业大学 | A kind of fresh-keeping microcapsules, preparation method and application |
| CN110205828A (en) * | 2019-06-20 | 2019-09-06 | 东莞简越服饰有限公司 | A kind of plants essential oil microcapsules and preparation method thereof |
| CN110214797A (en) * | 2019-06-17 | 2019-09-10 | 上海应用技术大学 | A kind of gold bergamot essential oil microcapsules insecticide and the preparation method and application thereof |
| CN110742097A (en) * | 2019-10-30 | 2020-02-04 | 深圳赛利特瑞环保科技有限公司 | Microcapsule slow-release type essential oil mosquito-repellent gel |
| CN110859194A (en) * | 2019-11-01 | 2020-03-06 | 西北农林科技大学 | Compound mosquito-repelling essential oil, application and mosquito repellent |
| CN110946790A (en) * | 2020-02-07 | 2020-04-03 | 陆洋 | Mosquito repellent liquid and preparation method and application thereof |
| CN111903678A (en) * | 2020-08-18 | 2020-11-10 | 常州美胜生物材料有限公司 | Preparation method of plant essential oil mosquito-repellent microcapsule |
| CN109819980B (en) * | 2019-04-02 | 2021-04-06 | 哈工大机器人（山东）智能装备研究院 | Slow-release mosquito-proof insect-repellent incense bead and preparation method thereof |
| CN114403162A (en) * | 2022-02-09 | 2022-04-29 | 中华全国供销合作总社南京野生植物综合利用研究所 | Borneol camphor essential oil microcapsule and preparation method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108402092A (en) * | 2018-03-30 | 2018-08-17 | 王敏 | A kind of toughness embedding slow-release mosquito-repellent incense |
| CN108967535A (en) * | 2018-08-02 | 2018-12-11 | 青岛农业大学 | A kind of fresh-keeping microcapsules, preparation method and application |
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