CN108752889A - A kind of preparation method of degradable agricultural products fresh-keeping box - Google Patents
A kind of preparation method of degradable agricultural products fresh-keeping box Download PDFInfo
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- CN108752889A CN108752889A CN201810809080.3A CN201810809080A CN108752889A CN 108752889 A CN108752889 A CN 108752889A CN 201810809080 A CN201810809080 A CN 201810809080A CN 108752889 A CN108752889 A CN 108752889A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/46—Applications of disintegrable, dissolvable or edible materials
- B65D65/466—Bio- or photodegradable packaging materials
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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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
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Abstract
The present invention provides a kind of preparation methods of degradable agricultural products fresh-keeping box, polylactic acid, modified starch, chitosan, polyvinyl alcohol, graphene are reacted first, then it is uniformly mixed again with active fruit shell carbon, white carbon, glass fibre, nano silicon dioxide, mildewproof bacteria remover, plasticizer, mixture in extruder extrusion molding to get the crisper.The preparation method of degradable agricultural products fresh-keeping box of the present invention, simple for process, safety non-pollution, the crisper being prepared have preferable restraining and sterilizing bacteria effect and higher intensity and useful life longevity, and the crisper is biodegradable, is suitble to promote and apply.
Description
Technical field
The present invention relates to energy saving consumptive material fields, and in particular, to a kind of preparation method of degradable agricultural products fresh-keeping box.
Background technology
With the emergence of petroleum industry, the plastic products that petrochemical industry is produced are widely used in each side of life
Face.The materials such as PP, PE are the common packagings in food industry, and transparency, glossiness and mechanical strength etc. are had excellent performance.Though
Right plastic products bring great convenience to daily life, but white pollution problems caused by plastic products are also increasingly
Seriously.Meanwhile it is always an eternal topic that food preservation is fresh-keeping, current international trend is to reduce making for food additives
With, it is fresh-keeping by new approach progress, such as antibacterial, oxidation resistant additive are added in food packaging.This food packaging
In active material slow release, to achieve the purpose that extend Food Shelf-life, without additive is added directly into
In food.
Degradable high polymer material can quick aging in the natural environment, be ultimately breaks down into small molecule by micro- life in environment
Object metabolism is fallen.Therefore, the research of biodegradable polymer causes the extensive concern of industry.Degradable high polymer material
It is divided into natural and artificial synthesized two class according to its source.Degradable natural high molecular material refers in animals and plants or human body
Naturally occurring macromolecular, such as cellulose, chitin, starch, lignin, alginic acid natural polysaecharides material and collagen,
The native proteins class material such as fibrinogen；Degradable synthesized polymer material mainly has polyhydroxy acid, polyanhydride, poly- amino
Acid and aliphatic polyester etc..
Application No. is 201510977873.2 Chinese invention patent applications to disclose a kind of crisper plastic material, former
Material each component is grouped as follows according to weight：30 ~ 40 parts of degradable plastic masterbatch, 15 ~ 30 parts of modified starch, copolymerized type propene polymer
8 ~ 12 parts, 2 ~ 4 parts of glycidyl methacrylate, 1 ~ 3 part of glass fibre, to stupid 0.6 ~ 0.8 part of dioctyl phthalate ethylene glycol fat,
2 ~ 4 parts of stearic acid, 0.3 ~ 0.5 part of antioxidant.The beneficial effects of the invention are as follows：The present invention uses degradable plastic masterbatch for original
Material plastic package material obtained has degradability, maintains the shock resistance of existing packaging material, inoxidizability and resistance to
Corrosivity, but bacterium, mould are easily grown in the crisper, and to be placed on fresh keeping time in crisper shorter for agricultural product.
Application No. is 201710474373.6 Chinese invention patent application, to disclose a kind of composite antibacterial fibre element fresh-keeping
Box and preparation method thereof, is extracted antimicrobial component from wormwood, field pennycress, Sophora alopecuroide and smalt, and with ferro-compound and
Other auxiliary agents are prepared for composite antibacterial material together, and above-mentioned material is dissolved in the agarose with porous structure, and is coated on
Crisper surface.Although the crisper being prepared has certain restraining and sterilizing bacteria effect, composite antibacterial material is coated on
Crisper inner surface, for a long time using being easy to fall off, durability is poor.
Therefore, research and development are a kind of not only having preferable restraining and sterilizing bacteria effect, and persistent with preferably using
The preparation method of degradable crisper is of great significance, and meets existing market needs.
Invention content
For the defects in the prior art, the object of the present invention is to provide a kind of preparation sides of degradable agricultural products fresh-keeping box
Method, simple for process, safety non-pollution, the crisper being prepared have preferable restraining and sterilizing bacteria effect and higher intensity and
Useful life longevity, and the crisper is biodegradable, effectively reduces offal treatment difficulty, meets environmentally friendly material
Requirement, be suitble to promote and apply.
The present invention solves technical problem and adopts the following technical scheme that：
The present invention relates to a kind of preparation methods of degradable agricultural products fresh-keeping box, include the following steps：
（1）Preparation prepares the raw material needed for crisper, includes each component of following parts by weight：
50 ~ 60 parts of polylactic acid, 25 ~ 34 parts of modified starch, 5 ~ 15 parts of chitosan, 3 ~ 10 parts of polyvinyl alcohol, graphene 0.5 ~ 3.2
Part, 4 ~ 8 parts of active fruit shell carbon, 3 ~ 7 parts of white carbon, 5 ~ 12 parts of glass fibre, 8 ~ 17 parts of nano silicon dioxide, mildewproof bacteria remover 5 ~
10 parts, 12 ~ 20 parts of plasticizer；
（2）The mildewproof bacteria remover for weighing proportional quantity is uniformly mixed with active fruit shell carbon, then into mixture be added water be made it is outstanding
Then mixture is placed under Ultrasonic Conditions 30 ~ 40min of ultrasonic disperse while stirring, is then allowed to stand 20 ~ 30min, removed by supernatant liquid
Moisture content is removed, mixture a1 is obtained, it is spare；
（3）The polylactic acid for weighing proportional quantity is added in reaction kettle, is warming up to 50 ~ 60 DEG C, and graphene is added while stirring, stirring
2 ~ 2.5h is reacted, polyvinyl alcohol is then added, the reaction was continued 1.5 ~ 2h obtains product a2；
（4）Product a2, modified starch, chitosan are added to 3 ~ 5min of mixing in mixer, are then added again into mixture
White carbon, glass fibre, nano silicon dioxide, plasticizer and mixture a1, continue 3 ~ 5min of mixing, obtain mixture a3；
（5）Mixture a3 is transferred in extruder, extrusion and blow molding, it is cooling to get to the crisper.
Preferably, the step（1）It include each component of following parts by weight：
56 parts of polylactic acid, 30 parts of modified starch, 12 parts of chitosan, 6 parts of polyvinyl alcohol, 1.8 parts of graphene, 6 parts of active fruit shell carbon,
5 parts of white carbon, 10 parts of glass fibre, 14 parts of nano silicon dioxide, 8 parts of mildewproof bacteria remover, 16 parts of plasticizer.
Preferably, the active fruit shell carbon is that peach-pit or walnut shell are refined through charing, activation, superheated steam Catalytic processes
Obtained product.
Preferably, the mildewproof bacteria remover includes each component of following parts by weight：
5 ~ 12 parts of safflower, 3 ~ 8 parts of the tuber of stemona, 10 ~ 18 parts of folium artemisiae argyi, 7 ~ 15 parts of honeysuckle, 5 ~ 10 parts of peppermint, 3 ~ 8 parts of Schisandra chinensis, rhizome of cyrtomium
6 ~ 12 parts, 5 ~ 9 parts of Kadsura Root-bark, 2 ~ 7 parts of wild chrysanthemum, 1 ~ 3 part of polyacrylamide.
Further, the preparation method of the mildewproof bacteria remover includes：
Each herbal component is weighed respectively according to proportioning, is crushed and is crossed 80 mesh sieve, be uniformly mixed, obtain mixed powder, then will
It is 1 that mixed powder, which is placed in volume ratio,:In 1 ethyl alcohol and the mixed solution of water, it is heated to reflux 5 ~ 6h, is filtered while hot, takes filtrate, it is cold
But, solvent is removed, mixture extract powder is obtained；
Polyacrylamide is mixed with water, is sufficiently stirred jelly, then extract powder is added in colloidal mixture, is stirred
It mixes uniformly, mixture is then placed in 30 ~ 40min of ultrasonic disperse under Ultrasonic Conditions, be then allowed to stand 10 ~ 20min, remove water
Part is to get the mildewproof bacteria remover.
Preferably, the plasticizer is any one of dioctyl phthalate, dibutyl phthalate.
Preferably, the step（2）The middle amount that water is added is 2 ~ 4 times of mildewproof bacteria remover and active fruit shell carbon gross mass.
Preferably, the step（2）Middle ultrasonic disperse temperature is 35 ~ 40 DEG C.
Preferably, the step（4）Middle melting temperature is 150 ~ 160 DEG C.
Preferably, the step（4）It is right respectively to be needed before middle white carbon, glass fibre, nano silicon dioxide addition mixer
Its pulverization process, it is 80 ~ 100 mesh to be crushed to grain size.
Compared with prior art, the present invention has following advantageous effect：
（1）The preparation method of degradable agricultural products fresh-keeping box of the present invention, simple for process, safety non-pollution are prepared
Crisper there is preferable restraining and sterilizing bacteria performance and higher intensity and useful life longevity, be applied to agricultural products fresh-keeping,
It can effectively inhibit crisper interior and the growth of surface of agricultural products bacterium, mould, extend the freshness date of agricultural product；And the guarantor
Fresh box is biodegradable, effectively reduces offal treatment difficulty, meets the requirement of environmentally friendly material, and suitable popularization is answered
With.
（2）The preparation method of degradable agricultural products fresh-keeping box of the present invention is using polylactic acid, modified starch as base
Plinth raw material so that the crisper being prepared has preferable degradability, greatly reduces waste product intractability, avoids
The generation of white pollution.
（3）It is added with polyvinyl alcohol in the preparation method of degradable agricultural products fresh-keeping box of the present invention, there is flowing
Property good, feature that cohesive force is strong, improve the dispersing uniformity between each component and being firmly bonded property, and then improve crisper
Strength character.
（4）The preparation method of degradable agricultural products fresh-keeping box of the present invention first changes polylactic acid and graphene
Property reaction so that the characteristic of the polymer being prepared not only reservation itself, due also to the presence of graphene, makes it have excellent
Mechanical properties and the preferable chemical stability such as wear-resisting, scratch-resistant, in addition, also having certain bactericidal property.
（5）The antimildew disinfectant added in the preparation method of degradable agricultural products fresh-keeping box of the present invention, in natural
Herb ingredients can not only effectively inhibit the growth of bacterium in crisper, mould, also have preferable insect prevention preservation, greatly
The big freshness date for extending agricultural product, has preferable application value.
（6）The active fruit shell carbon added in the preparation method of degradable agricultural products fresh-keeping box of the present invention has wear-resisting
Intensity is good, gap is flourishing, absorption property is high, intensity is high, easy regeneration, economy and durability the advantages that, cooperateed with glass fibre, white carbon
Effect so that crisper has preferable intensity, and antimildew disinfectant is supported on active fruit shell carbon surface, improves antimycotic antiseptic
The agent dispersing uniformity and drug effect homogeneity in crisper again.
Specific implementation mode
Present invention will be further explained below with reference to specific examples.These embodiments are merely to illustrate the present invention and do not have to
In limiting the scope of the invention.
Embodiment 1：
The present embodiment is related to a kind of preparation method of degradable agricultural products fresh-keeping box；
The preparation method of the degradable agricultural products fresh-keeping box, includes the following steps：
（1）Preparation prepares the raw material needed for crisper, includes each component of following parts by weight：
56 parts of polylactic acid, 30 parts of modified starch, 12 parts of chitosan, 6 parts of polyvinyl alcohol, 1.8 parts of graphene, 6 parts of active fruit shell carbon,
5 parts of white carbon, 10 parts of glass fibre, 14 parts of nano silicon dioxide, 8 parts of mildewproof bacteria remover, 16 parts of plasticizer；
（2）The mildewproof bacteria remover for weighing proportional quantity is uniformly mixed with active fruit shell carbon, then into mixture be added water be made it is outstanding
Then mixture is placed under Ultrasonic Conditions ultrasonic disperse 40min while stirring by supernatant liquid, be then allowed to stand 30min, removes water
Part, mixture a1 is obtained, it is spare；
（3）The polylactic acid for weighing proportional quantity is added in reaction kettle, is warming up to 50 ~ 60 DEG C, and graphene is added while stirring, stirring
2h is reacted, polyvinyl alcohol is then added, the reaction was continued 2h obtains product a2；
（4）Product a2, modified starch, chitosan are added in mixer and are kneaded 5min, is then added again into mixture white
Carbon black, glass fibre, nano silicon dioxide, plasticizer and mixture a1 continue to be kneaded 3min, obtain mixture a3；
（5）Mixture a3 is transferred in extruder, extrusion and blow molding, it is cooling to get to the crisper.
Wherein, the active fruit shell carbon is that peach-pit or walnut shell are refining to obtain through charing, activation, superheated steam Catalytic processes
The product arrived.
Wherein, the mildewproof bacteria remover includes each component of following parts by weight：
8 parts of safflower, 5 parts of the tuber of stemona, 15 parts of folium artemisiae argyi, 12 parts of honeysuckle, 7 parts of peppermint, 5 parts of Schisandra chinensis, 10 parts of rhizome of cyrtomium, 6 parts of Kadsura Root-bark,
3 parts of wild chrysanthemum, 2 parts of polyacrylamide.
Further, the preparation method of the mildewproof bacteria remover includes：
Each herbal component is weighed respectively according to proportioning, is crushed and is crossed 80 mesh sieve, be uniformly mixed, obtain mixed powder, then will
It is 1 that mixed powder, which is placed in volume ratio,:In 1 ethyl alcohol and the mixed solution of water, it is heated to reflux 6h, is filtered while hot, takes filtrate, it is cold
But, solvent is removed, mixture extract powder is obtained；
Polyacrylamide is mixed with water, is sufficiently stirred jelly, then extract powder is added in colloidal mixture, is stirred
Mix uniformly, mixture be then placed in ultrasonic disperse 30min under Ultrasonic Conditions, be then allowed to stand 20min, remove moisture content to get
The mildewproof bacteria remover.
Wherein, the plasticizer is dioctyl phthalate.
Wherein, the step（2）The middle amount that water is added is 3 times of mildewproof bacteria remover and active fruit shell carbon gross mass.
Wherein, the step（2）Middle ultrasonic disperse temperature is 40 DEG C.
Wherein, the step（4）Middle melting temperature is 160 DEG C.
Wherein, the step（4）Middle white carbon, glass fibre, nano silicon dioxide need respectively before mixer is added to it
Pulverization process, it is 100 mesh to be crushed to grain size.
Embodiment 2：
The present embodiment is related to a kind of preparation method of degradable agricultural products fresh-keeping box；
The preparation method of the degradable agricultural products fresh-keeping box, includes the following steps：
（1）Preparation prepares the raw material needed for crisper, includes each component of following parts by weight：
50 parts of polylactic acid, 25 parts of modified starch, 5 parts of chitosan, 3 parts of polyvinyl alcohol, 0.5 part of graphene, 4 parts of active fruit shell carbon,
3 parts of white carbon, 5 parts of glass fibre, 8 parts of nano silicon dioxide, 5 parts of mildewproof bacteria remover, 12 parts of plasticizer；
（2）The mildewproof bacteria remover for weighing proportional quantity is uniformly mixed with active fruit shell carbon, then into mixture be added water be made it is outstanding
Then mixture is placed under Ultrasonic Conditions ultrasonic disperse 30min while stirring by supernatant liquid, be then allowed to stand 20min, removes water
Part, mixture a1 is obtained, it is spare；
（3）The polylactic acid for weighing proportional quantity is added in reaction kettle, is warming up to 50 DEG C, and graphene is added while stirring, and stirring is anti-
2.5h is answered, polyvinyl alcohol is then added, the reaction was continued 1.5h obtains product a2；
（4）Product a2, modified starch, chitosan are added in mixer and are kneaded 3min, is then added again into mixture white
Carbon black, glass fibre, nano silicon dioxide, plasticizer and mixture a1 continue to be kneaded 3min, obtain mixture a3；
（5）Mixture a3 is transferred in extruder, extrusion and blow molding, it is cooling to get to the crisper.
Wherein, the active fruit shell carbon is that peach-pit or walnut shell are refining to obtain through charing, activation, superheated steam Catalytic processes
The product arrived.
Wherein, the mildewproof bacteria remover includes each component of following parts by weight：
5 parts of safflower, 3 parts of the tuber of stemona, 10 parts of folium artemisiae argyi, 7 parts of honeysuckle, 5 parts of peppermint, 3 parts of Schisandra chinensis, 6 parts of rhizome of cyrtomium, 5 parts of Kadsura Root-bark, open country
2 parts of chrysanthemum, 1 part of polyacrylamide.
Further, the preparation method of the mildewproof bacteria remover includes：
Each herbal component is weighed respectively according to proportioning, is crushed and is crossed 80 mesh sieve, be uniformly mixed, obtain mixed powder, then will
It is 1 that mixed powder, which is placed in volume ratio,:In 1 ethyl alcohol and the mixed solution of water, it is heated to reflux 5h, is filtered while hot, takes filtrate, it is cold
But, solvent is removed, mixture extract powder is obtained；
Polyacrylamide is mixed with water, is sufficiently stirred jelly, then extract powder is added in colloidal mixture, is stirred
Mix uniformly, mixture be then placed in ultrasonic disperse 30min under Ultrasonic Conditions, be then allowed to stand 10min, remove moisture content to get
The mildewproof bacteria remover.
Wherein, the plasticizer is dioctyl phthalate.
Wherein, the step（2）The middle amount that water is added is 2 times of mildewproof bacteria remover and active fruit shell carbon gross mass.
Wherein, the step（2）Middle ultrasonic disperse temperature is 35 DEG C.
Wherein, the step（4）Middle melting temperature is 150 DEG C.
Wherein, the step（4）Middle white carbon, glass fibre, nano silicon dioxide need respectively before mixer is added to it
Pulverization process, it is 80 mesh to be crushed to grain size.
Embodiment 3：
The present embodiment is related to a kind of preparation method of degradable agricultural products fresh-keeping box；
The preparation method of the degradable agricultural products fresh-keeping box, includes the following steps：
（1）Preparation prepares the raw material needed for crisper, includes each component of following parts by weight：
60 parts of polylactic acid, 34 parts of modified starch, 15 parts of chitosan, 10 parts of polyvinyl alcohol, 3.2 parts of graphene, active fruit shell carbon 8
Part, 7 parts of white carbon, 12 parts of glass fibre, 17 parts of nano silicon dioxide, 10 parts of mildewproof bacteria remover, 20 parts of plasticizer；
（2）The mildewproof bacteria remover for weighing proportional quantity is uniformly mixed with active fruit shell carbon, then into mixture be added water be made it is outstanding
Then mixture is placed under Ultrasonic Conditions ultrasonic disperse 40min while stirring by supernatant liquid, be then allowed to stand 30min, removes water
Part, mixture a1 is obtained, it is spare；
（3）The polylactic acid for weighing proportional quantity is added in reaction kettle, is warming up to 60 DEG C, and graphene is added while stirring, and stirring is anti-
2h is answered, polyvinyl alcohol is then added, the reaction was continued 2h obtains product a2；
（4）Product a2, modified starch, chitosan are added in mixer and are kneaded 5min, is then added again into mixture white
Carbon black, glass fibre, nano silicon dioxide, plasticizer and mixture a1 continue to be kneaded 5min, obtain mixture a3；
（5）Mixture a3 is transferred in extruder, extrusion and blow molding, it is cooling to get to the crisper.
Wherein, the active fruit shell carbon is that peach-pit or walnut shell are refining to obtain through charing, activation, superheated steam Catalytic processes
The product arrived.
Wherein, the mildewproof bacteria remover includes each component of following parts by weight：
12 parts of safflower, 8 parts of the tuber of stemona, 18 parts of folium artemisiae argyi, 15 parts of honeysuckle, 10 parts of peppermint, 8 parts of Schisandra chinensis, 12 parts of rhizome of cyrtomium, Kadsura Root-bark 9
Part, 7 parts of wild chrysanthemum, 3 parts of polyacrylamide.
Further, the preparation method of the mildewproof bacteria remover includes：
Each herbal component is weighed respectively according to proportioning, is crushed and is crossed 80 mesh sieve, be uniformly mixed, obtain mixed powder, then will
It is 1 that mixed powder, which is placed in volume ratio,:In 1 ethyl alcohol and the mixed solution of water, it is heated to reflux 6h, is filtered while hot, takes filtrate, it is cold
But, solvent is removed, mixture extract powder is obtained；
Polyacrylamide is mixed with water, is sufficiently stirred jelly, then extract powder is added in colloidal mixture, is stirred
Mix uniformly, mixture be then placed in ultrasonic disperse 40min under Ultrasonic Conditions, be then allowed to stand 20min, remove moisture content to get
The mildewproof bacteria remover.
Wherein, the plasticizer is dibutyl phthalate.
Wherein, the step（2）The middle amount that water is added is 4 times of mildewproof bacteria remover and active fruit shell carbon gross mass.
Wherein, the step（2）Middle ultrasonic disperse temperature is 40 DEG C.
Wherein, the step（4）Middle melting temperature is 160 DEG C.
Wherein, the step（4）Middle white carbon, glass fibre, nano silicon dioxide need respectively before mixer is added to it
Pulverization process, it is 100 mesh to be crushed to grain size.
Comparative example：
Crisper is prepared according to the method for the Chinese invention patent application application No. is 201510977873.2.
Experiment：
According to QB/T 2591《Antibiotic plastic Anti-microbial Performance Tests method and antibacterial effect》,GB T 18006.2-1999 《One
Secondary property degradable tableware degradation property test method》,GB 18006.1-1999 《The general skill of degradable disposable dinner (beverage) containers
Art condition》The crisper that the crisper and comparative example method be prepared to the embodiment of the present invention 1 ~ 3 is prepared carries out performance
Test, concrete outcome are as shown in the table：
| Project | Antibacterium rate % | Fungi-growth grade | Rhegma grade | Weight average molecular weight rate of descent % |
| Embodiment 1 | 99.6 | 0 | Ⅲ | 92 |
| Embodiment 2 | 99.5 | 0 | Ⅲ | 93 |
| Embodiment 3 | 99.7 | 0 | Ⅲ | 91 |
| Comparative example | 62.8 | 1 | Ⅱ | 73 |
As seen from the above table, the crisper that the embodiment of the present invention 1 ~ 3 is prepared is compared with crisper prepared by comparative example, antibiotic rate
Up to 99% or more, there is raising by a relatively large margin, mould proof grade to reach 0 grade, there is excellent bacteriostat degerming effect；And the present invention
In the degradability test for the crisper being prepared, is tested using field test-fence exposure test, radiated using A grades
Amount, rhegma grade reaches III, and weight average molecular weight rate of descent reaches 90% or more, compared to the crisper that comparative example is prepared,
Degradability increases substantially, and greatly reduces the post-processing difficulty of product, reduces human and material resources consumption.
In conclusion the preparation method of degradable agricultural products fresh-keeping box of the present invention, simple for process, safety is without dirt
Dye, the crisper being prepared have preferable restraining and sterilizing bacteria effect and higher intensity and useful life longevity, and described fresh-keeping
Box is biodegradable, effectively reduces offal treatment difficulty, meets the requirement of environmentally friendly material, is suitble to promote and apply.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.
Claims (10)
1. a kind of preparation method of degradable agricultural products fresh-keeping box, which is characterized in that include the following steps：
（1）Preparation prepares the raw material needed for crisper, includes each component of following parts by weight：
50 ~ 60 parts of polylactic acid, 25 ~ 34 parts of modified starch, 5 ~ 15 parts of chitosan, 3 ~ 10 parts of polyvinyl alcohol, graphene 0.5 ~ 3.2
Part, 4 ~ 8 parts of active fruit shell carbon, 3 ~ 7 parts of white carbon, 5 ~ 12 parts of glass fibre, 8 ~ 17 parts of nano silicon dioxide, mildewproof bacteria remover 5 ~
10 parts, 12 ~ 20 parts of plasticizer；
（2）The mildewproof bacteria remover for weighing proportional quantity is uniformly mixed with active fruit shell carbon, then into mixture be added water be made it is outstanding
Then mixture is placed under Ultrasonic Conditions 30 ~ 40min of ultrasonic disperse while stirring, is then allowed to stand 20 ~ 30min, removed by supernatant liquid
Moisture content is removed, mixture a1 is obtained, it is spare；
（3）The polylactic acid for weighing proportional quantity is added in reaction kettle, is warming up to 50 ~ 60 DEG C, and graphene is added while stirring, stirring
2 ~ 2.5h is reacted, polyvinyl alcohol is then added, the reaction was continued 1.5 ~ 2h obtains product a2；
（4）Product a2, modified starch, chitosan are added to 3 ~ 5min of mixing in mixer, are then added again into mixture
White carbon, glass fibre, nano silicon dioxide, plasticizer and mixture a1, continue 3 ~ 5min of mixing, obtain mixture a3；
（5）Mixture a3 is transferred in extruder, extrusion and blow molding, it is cooling to get to the crisper.
2. the preparation method of degradable agricultural products fresh-keeping box according to claim 1, which is characterized in that the step（1）
It include each component of following parts by weight：
56 parts of polylactic acid, 30 parts of modified starch, 12 parts of chitosan, 6 parts of polyvinyl alcohol, 1.8 parts of graphene, 6 parts of active fruit shell carbon,
5 parts of white carbon, 10 parts of glass fibre, 14 parts of nano silicon dioxide, 8 parts of mildewproof bacteria remover, 16 parts of plasticizer.
3. the preparation method of degradable agricultural products fresh-keeping box according to claim 1, which is characterized in that the shell activity
Charcoal is the product that peach-pit or walnut shell are refining to obtain through charing, activation, superheated steam Catalytic processes.
4. the preparation method of degradable agricultural products fresh-keeping box according to claim 1, which is characterized in that the mould-proof bacteria-removing
Agent includes each component of following parts by weight：
5 ~ 12 parts of safflower, 3 ~ 8 parts of the tuber of stemona, 10 ~ 18 parts of folium artemisiae argyi, 7 ~ 15 parts of honeysuckle, 5 ~ 10 parts of peppermint, 3 ~ 8 parts of Schisandra chinensis, rhizome of cyrtomium
6 ~ 12 parts, 5 ~ 9 parts of Kadsura Root-bark, 2 ~ 7 parts of wild chrysanthemum, 1 ~ 3 part of polyacrylamide.
5. the preparation method of degradable agricultural products fresh-keeping box according to claim 4, which is characterized in that the mould-proof bacteria-removing
The preparation method of agent includes：
Each herbal component is weighed respectively according to proportioning, is crushed and is crossed 80 mesh sieve, be uniformly mixed, obtain mixed powder, then will
It is 1 that mixed powder, which is placed in volume ratio,:In 1 ethyl alcohol and the mixed solution of water, it is heated to reflux 5 ~ 6h, is filtered while hot, takes filtrate, it is cold
But, solvent is removed, mixture extract powder is obtained；
Polyacrylamide is mixed with water, is sufficiently stirred jelly, then extract powder is added in colloidal mixture, is stirred
It mixes uniformly, mixture is then placed in 30 ~ 40min of ultrasonic disperse under Ultrasonic Conditions, be then allowed to stand 10 ~ 20min, remove water
Part is to get the mildewproof bacteria remover.
6. the preparation method of degradable agricultural products fresh-keeping box according to claim 1, which is characterized in that the plasticizer is
Any one of dioctyl phthalate, dibutyl phthalate.
7. the preparation method of degradable agricultural products fresh-keeping box according to claim 1, which is characterized in that the step（2）
The middle amount that water is added is 2 ~ 4 times of mildewproof bacteria remover and active fruit shell carbon gross mass.
8. the preparation method of degradable agricultural products fresh-keeping box according to claim 1, which is characterized in that the step（2）
Middle ultrasonic disperse temperature is 35 ~ 40 DEG C.
9. the preparation method of degradable agricultural products fresh-keeping box according to claim 1, which is characterized in that the step（4）
Middle melting temperature is 150 ~ 160 DEG C.
10. the preparation method of degradable agricultural products fresh-keeping box according to claim 1, which is characterized in that the step（4）
Middle white carbon, glass fibre, nano silicon dioxide be added before mixer need respectively to be crushed to its pulverization process grain size be 80 ~
100 mesh.
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| CN201810809080.3A CN108752889A (en) | 2018-07-23 | 2018-07-23 | A kind of preparation method of degradable agricultural products fresh-keeping box |
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| CN201810809080.3A CN108752889A (en) | 2018-07-23 | 2018-07-23 | A kind of preparation method of degradable agricultural products fresh-keeping box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112538249A (en) * | 2020-12-02 | 2021-03-23 | 台州市薇薇安工贸有限公司 | Preparation process of safe low-temperature-resistant imitation leather preservation box |
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|---|---|---|---|---|
| CN103159984A (en) * | 2013-04-08 | 2013-06-19 | 华东理工大学 | All-degradable thermoplastic starch/polylactic acid blend material and preparation method thereof |
| CN106366595A (en) * | 2016-09-29 | 2017-02-01 | 青岛海之源智能技术有限公司 | Antibacterial polylactic acid composite and preparation method thereof |
| CN106543667A (en) * | 2016-10-31 | 2017-03-29 | 陈少双 | A kind of biodegradable plasticss resin and its preparation technology |
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2018
- 2018-07-23 CN CN201810809080.3A patent/CN108752889A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103159984A (en) * | 2013-04-08 | 2013-06-19 | 华东理工大学 | All-degradable thermoplastic starch/polylactic acid blend material and preparation method thereof |
| CN106366595A (en) * | 2016-09-29 | 2017-02-01 | 青岛海之源智能技术有限公司 | Antibacterial polylactic acid composite and preparation method thereof |
| CN106543667A (en) * | 2016-10-31 | 2017-03-29 | 陈少双 | A kind of biodegradable plasticss resin and its preparation technology |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112538249A (en) * | 2020-12-02 | 2021-03-23 | 台州市薇薇安工贸有限公司 | Preparation process of safe low-temperature-resistant imitation leather preservation box |
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