CN110511544A - A kind of biodegradable breathable composite film and preparation method thereof - Google Patents
A kind of biodegradable breathable composite film and preparation method thereof Download PDFInfo
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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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- 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
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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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
- C08J2403/04—Starch derivatives
- C08J2403/06—Esters
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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
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—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
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
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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
- C08K13/02—Organic and inorganic ingredients
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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
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
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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
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/20—Carboxylic acid amides
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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
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
- C08K5/526—Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds
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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
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
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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 relates to degradable breathable composite film technical fields, in particular to a kind of biodegradable breathable composite film and preparation method thereof, wherein, it includes following preparing raw material that described one kind, which has a horror of degradable breathable composite film: PE resin, denaturation porous-starch, PBAT resin, compatilizer, lubricant, weather resisting agent, opening agent.A kind of biodegradable breathable composite film provided by the invention, using PE and PBAT as matrix resin, utilize the porous and biodegradability properties of denaturation porous-starch, develop a kind of biodegradable breathable composite film, it solves that traditional gas permeable composite membrane hole aperture is uneven, permeability is bad, the disadvantages of can not degrading, can be widely applied to the fields such as fruits and vegetables, seafood storage, transport.
Description
Technical field
The present invention relates to degradable breathable composite film technical field, in particular to a kind of biodegradable breathable composite film and
Preparation method.
Background technique
In recent years, with the rapid development of logistics industry, fresh fruit of vegetables and seafood enter people's life also slowly from impossible
Become possible, and this is also just being to rely on the more and more mature of preservation technology, and extend fruits and vegetables and seafood storage life and shelf
Again and fresh-keeping packaging material, that is, breathable composite film has close relationship for the preservation technology of phase.
Traditional ventilated membrane mainly use inorganic mineral powder filling PE material preparation, ventilative principle be using inorganic particle with
Interfacial separation between resin forms the hole for reaching certain pore size to reach ventilative purpose, this is easy for due to inorganic particle
Reunion cause ventilated membrane pore-size distribution uneven, addition inorganic mineral powder easily causes stress concentration, causes ventilated membrane gas permeability
Can be bad, and traditional gas permeable film is mostly disposable and is unable to natural degradation, is caused to form white garbage to environment
Pollution.
Summary of the invention
Breathe freely that membrane aperture is uneven, permeability is bad in traditional ventilated membrane to solve to refer in above-mentioned background technique and
The problem of can not degrading, the present invention provide a kind of biodegradable breathable composite film, including following prepare raw material: PE resin becomes
Property porous-starch, PBAT resin, compatilizer, lubricant, weather resisting agent, opening agent.
On the basis of above scheme, further, the raw material including following parts by weight:
On the basis of above scheme, further, it is described denaturation porous-starch the preparation method comprises the following steps:
S100, porous-starch and water are added in reaction vessel and stirred, the water preferably uses distilled water, and the stirring is excellent
It is selected as that porous-starch and water are stirred to obtain starch suspension；
S200, after starch suspension is heated to 50~70 DEG C while stirring, the heating method is preferably heating water bath,
Moreover, which is preferably transferred to above-mentioned starch suspension in three-necked flask and carries out water-bath while stirring and add
Heat, sequentially adds acetic anhydride and toluene-4-sulfonic acid is stirred and reacted, it is described sequentially add acetic anhydride and toluene-4-sulfonic acid after
Stirring preferably be sufficiently stirred and 0.5~3h of sustained response, obtain reaction product A；
S300, pH=7.1~7.8 for adjusting reaction product A, the reality that pH value is adjusted in this step is preferably anhydrous slufuric acid
Sodium and sodium hydroxide, and 50~60 DEG C are adjusted the temperature to, it adds crosslinking agent and is reacted, the crosslinking agent is preferably crosslinking agent
CL, the reaction time are preferably 2~4h, obtain reaction product B；
S400, adjust reaction product B pH to neutrality after, washing, drying, crush obtain denaturation porous-starch, this step
In, the reagent for adjusting pH is preferably sodium dihydrogen citrate.
On the basis of above scheme, further, the porous-starch the preparation method comprises the following steps:
S110, cassava ative starch and water are added in reaction vessel and are stirred, the water preferably uses distilled water, described to stir
It mixes and preferably cassava ative starch and water is stirred, and obtain suspension；
S120, by suspension 40~60 DEG C at a temperature of, while stirring heating make starch gelatinization, obtain gelatinized starch,
The time of the gelatinization is preferably 30~60min, and preferably carries out 20~40min of heat preservation again after being gelatinized；
S130, it is freezed at a temperature of gelatinized starch is placed in -5 DEG C, the time of the freezing is preferably 48h；
S140, the sample after freezing is taken out, acetone is added and is stirred, impregnates, the acetone is preferably that volume is dense
Degree is 20% acetone soln, and continues 3~5h of stirring；Rotary evaporation under the conditions of 50-80 DEG C again, re-dry, grinding
Porous-starch is obtained, the rotary evaporation preferably carries out at 50~80 DEG C of heating water bath.
On the basis of above scheme, further, the PE resin is blown film grade low density polyethylene (LDPE) (LDPE).
On the basis of above scheme, further, the PE resin is preferably that melt flow rate (MFR) is 2.8g/10min,
Density 0.92g/cm3PE resin be blown film grade low density polyethylene (LDPE) (LDPE).
On the basis of above scheme, further, the PBAT resin is polyadipate/butylene terephthalate.
On the basis of above scheme, further, the PBAT resin is preferably that melt flow rate (MFR) is 2~5g/
10min, polyadipate/butylene terephthalate of Relative biological degradation rate >=90%.
On the basis of above scheme, further, the lubricant is at least one of PE wax, stearic acid, EBS.
On the basis of above scheme, further, the compatilizer is POE-g-MAH, PE-g-MAH, EVA-g-MAH
At least one of；The weather resisting agent is the mixture of antioxidant 168 and ultraviolet absorbing agent UV531.
On the basis of above scheme, further, the weight ratio of the antioxidant 168 and UV531 is (1~5): 1.
On the basis of above scheme, further, the opening agent is silica, in the inorganic opening agent of talcum powder
It is at least one.
The present invention provides the preparation method of biodegradable breathable composite film described in one kind, comprising the following steps:
Step 1: denaturation porous-starch, PE resin, PBAT resin, compatilizer, lubricant, weather resisting agent and opening agent are mixed
Merge discharging, obtains biodegradable breathable composite film mixture；
Step 2: after the biodegradable breathable composite film mixture is carried out melt blending in mixer, double
Screw Extrusion machine carries out melting extrusion, obtains biodegradable breathable composite film modified materials；
It is filmed, obtains described Step 3: the biodegradable breathable composite film modified materials are added in inflation film manufacturing machine
Biodegradable breathable composite film.
On the basis of above scheme, further, in the step 2, the running parameter of the mixer are as follows: close
Refining temperature is 60~100 DEG C, and screw speed is 150~300r/min；The running parameter of double screw extruder are as follows: area's temperature is
50~65 DEG C, two area's temperature are 60~75 DEG C, and three area's temperature are 90~110 DEG C, and four area's temperature are 110~130 DEG C, five Qu Wendu
It is 110~120 DEG C, die head temperature is 80~100 DEG C, and rate of feeding is 50~150r/min, and screw speed is 150~300r/
min。
On the basis of above scheme, further, in the step 3, the running parameter of the inflation film manufacturing machine are as follows: add
Material 60~80 DEG C of section, 110~130 DEG C of middle section, 130~160 DEG C of leading portion, head temperature: 130~150 DEG C, screw speed be 50~
100r/min。
A kind of biodegradable breathable composite film provided by the invention and preparation method thereof, compared with prior art, has
Following technical principle and the utility model has the advantages that
Porous-starch is a kind of novel starch, with the three-dimensional network shape microstructure that hole is interconnected, the present invention
Processing method is combined with freezing by being crosslinked, porous is carried out to starch and handles obtained porous-starch material, meanwhile, starch is
With certain rigid natural macromolecular material, intermolecular there are hydrogen bonds, and intermolecular force is very strong, the property with polyalcohol
Matter, therefore starch is high with viscosity, hydrophilic ability is strong, is easy the characteristics such as gelatinization, greatly limits its application, especially adds in plastics
Application field in terms of work, and by carrying out denaturation treatment to starch, substitution reaction is occurred to starch hydroxyl using acetic anhydride, it should
Reaction temperature is low, generate starch acetate stability it is preferable so that between starch molecule hydrogen bond action weaken, macromolecular chain can compared with
It is moved under low temperature, reduces the melting temperature of starch, effectively improve the thermoplasticity and hydrophobicity of starch, be conducive to hot melt processing
Performance is conducive to starch and occurs " half-cooked " phenomenon in degradable material, improve thermoplasticity and dredge by reducing starch melting temperature
The aqueous compatibility for being conducive to improve starch and matrix resin, is conducive to uniformly forming and reduce since poor compatibility is led for aperture
The stress of cause is concentrated or interface conditions, to improve application of the starch in degradation plastic；The addition of toluene-4-sulfonic acid simultaneously
Promote the progress that acetic anhydride is reacted with starch hydroxy esterification.And the present invention uses PE and PBAT to utilize change as matrix resin
Property porous-starch porous and biodegradability properties, addition compatilizer, other processing aids such as lubricant develop a kind of life
Biodegradable breathable composite film, solves that traditional gas permeable composite membrane hole aperture is uneven, permeability is bad, degradation rate is low etc. lacks
Point can be widely applied to the fields such as fruits and vegetables, seafood storage, transport.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of SEM image for being denaturalized porous-starch provided by the invention；
Fig. 2 is a kind of SEM image of biodegradable breathable composite film provided by the invention；
Fig. 3 is the SEM image of traditional gas permeable composite membrane.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
The present invention also provides embodiments as follows:
In embodiment and comparative example below, each raw material prepares raw material using following:
PE resin: model 2426H, blown film grade low density polyethylene (LDPE) (LDPE), melt flow rate (MFR) 2.8g/10min,
Density 0.92g/cm3, it is selected from Daqing petrochemical；
PBAT resin: for polyadipate/butylene terephthalate, model: CZF-06, melt flow rate (MFR) are 2~5g/
10min, Relative biological degradation rate >=90% are selected from Suzhou Hanfeng New Material Co., Ltd.；
Starch material: tapioca, model: BEST-2, water content≤10% are selected from the limited public affairs of Sanming City Blockbuster starch
Department；
Compatilizer: POE-g-MAH, PE-g-MAH, EVA-g-MAH are commercial product；
Lubricant: PE wax, stearic acid, EBS are commercial product；
Weather resisting agent: the mixture of antioxidant 168 and ultraviolet absorbing agent UV531, the antioxidant 168 and UV531
Weight ratio be (1~5): 1, both for commercial product, be selected from Guangzhou Yan Tai Chemical Co., Ltd.；
Opening agent: silica opening agent and talcum powder opening agent model are respectively M-519 and ST-6016, commercial product.
Embodiment 1-5 and comparative example 1-4:
The component and proportion list of table 1 embodiment 1-5 and comparative example 1-4
It is specific the preparation method is as follows:
The preparation of porous-starch:
(1) the cassava ative starch of 50g is weighed, is added in the beaker equipped with 100mL distilled water, is formed after stirring
Suspension；
(2) suspension is poured into reaction kettle, at 50 °C while stirring heating carry out starch gelatinization, gelatinization when
Between be 50min, keep the temperature 30min, obtain gelatinized starch；
(3) gelatinized starch is directly poured on the carrying disk of freeze drier, is put into refrigerator, -5 DEG C at a temperature of
Pre-freeze 48h；
(4) sample after freezing is taken out, the acetone soln 20mL that volumetric concentration is 20% is added, 4h, water are impregnated in stirring
60 DEG C of rotary evaporations are bathed, acetone is removed, porous-starch material can be obtained in drying to constant weight, grinding.
The SEM image of denaturation porous-starch obtained is as shown in Figure 1.
It is denaturalized the preparation of porous-starch:
It weighs 200g porous-starch material obtained above to be added in 400mL distilled water, stirs to form starch
Suspension is transferred in 1000mL three-necked flask, and heating water bath sequentially adds the acetic anhydride and 2mL first of 5mL to 60 DEG C while stirring
1.5h is reacted after benzene -4- sulfonic acid, 10g anhydrous sodium sulfate is then added and 6g sodium hydroxide adjusts pH=7.8 and stirs to completely molten
Solution.It is eventually adding 3g crosslinking agent CL and reacts 2h under the conditions of 60 DEG C of temperature, 1.2g sodium dihydrogen citrate is added and adjusts pH to neutrality, washes
Wash, dry, crushing and to obtain denaturation porous-starch.
The preparation of biodegradable breathable composite film:
(1) it by denaturation porous-starch obtained, and PE resin, PBAT resin, compatilizer, lubricant, antioxidant and opens
After mouth agent is mixed, discharging obtains biodegradable breathable composite film mixture；
(2) after the biodegradable breathable composite film mixture being carried out melt blending in mixer, in twin-screw
Melting extrusion is carried out in extruder, obtains biodegradable breathable composite film modified materials；The running parameter of mixer are as follows: mixing temperature
Degree is 80 DEG C, screw speed 200r/min；The running parameter of double screw extruder are as follows: area's temperature is 60 DEG C, two area's temperature
It is 75 DEG C, three area's temperature are 105 DEG C, and four area's temperature are 115 DEG C, and five area's temperature are 115 DEG C, and die head temperature is 95 DEG C, feeding speed
Degree is 80r/min, screw speed 200r/min；
(3) the biodegradable breathable composite film modified materials are added in inflation film manufacturing machine and are filmed, obtain the biology
Degradable breathable composite film.Inflation film manufacturing machine running parameter are as follows: 70 DEG C of feeding section, 115 DEG C of middle section, 145 DEG C of leading portion, head temperature: 130
DEG C, screw speed 60r/min.
Biodegradable breathable composite film SEM image obtained is as shown in Fig. 2, and breathing freely for preparing in the prior art is compound
It is compound to will be obvious that biodegradable prepared by the present invention is breathed freely as shown in figure 3, by the comparison of SEM image for film SEM image
Film has more uniform hole aperture.
Specific performance detection and evaluation of result are as follows:
The sample that above-described embodiment 1-5 and comparative example 1-4 is obtained, " plastics are thin according to GB/T1038-2000 for air transmission coefficient
Film and thin slice gas-premeable test method-pressure differential method " and aerobic biological degradation rate be tested for the property according to ASTM D6400；
Test result is as shown in table 2.
The test result of table 2 embodiment 1-5 and comparative example 1-4
By 1 result of table as it can be seen that embodiment 1-5 and comparative example 1-4 is denaturalized porous-starch regardless of embodiment or comparative example
Addition can effectively improve the O of composite membrane2Air transmission coefficient and CO2Air transmission coefficient, comparative example 1 use common tapioca,
The O of composite membrane2Air transmission coefficient and CO2Air transmission coefficient obviously will be lower than using denaturation porous-starch material；Comparative example 2-3 is addition
PBAT resin, but it has been separately added into porous converted starch and common tapioca, the permeability of comparative example 2 is substantially better than comparison
Example 3, and the two aerobic biological degradation rate is not much different, and all significantly lower than PBAT resin is used, illustrates that PBAT addition can be mentioned effectively
The aerobic biological degradation rate of high composite membrane.Comparative example 4 does not use starch material, and permeability is in all embodiment and comparative examples
It is worst, illustrate that the addition for being denaturalized porous-starch can effectively improve the permeability of composite membrane.It can be seen that being made using PBAT and PE
For matrix resin, porous-starch is denaturalized by addition, not only further improves O2Air transmission coefficient and CO2Air transmission coefficient, together
When also improve the aerobic biological degradation rate of composite membrane；In the technical program, combined by specific preparation method, it is creative
Develop a kind of biodegradable breathable composite film, solve traditional gas permeable composite membrane hole aperture is uneven, permeability not
Good, the disadvantages of can not degrading, can be widely applied to the fields such as fruits and vegetables, seafood storage, transport.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of biodegradable breathable composite film, which is characterized in that prepare raw material including following: PE resin, the porous shallow lake of denaturation
Powder, PBAT resin, compatilizer, lubricant, weather resisting agent, opening agent.
2. biodegradable breathable composite film according to claim 1, which is characterized in that the original including following parts by weight
Material:
3. biodegradable breathable composite film according to claim 1 or 2, it is characterised in that: the denaturation porous-starch
The preparation method comprises the following steps:
S100, porous-starch and water are added in reaction vessel and stirred, obtain starch suspension；
S200, it after starch suspension is heated to 50~70 DEG C while stirring, sequentially adds acetic anhydride and toluene-4-sulfonic acid stirs
It mixes and reacts, obtain reaction product A；
S300, pH=7.1~7.8 for adjusting reaction product A, and 50~60 DEG C are adjusted the temperature to, it adds crosslinking agent and carries out instead
It answers, obtains reaction product B；
S400, adjust reaction product B pH to neutrality after, washing, drying, crush obtain denaturation porous-starch.
4. biodegradable breathable composite film according to claim 3, it is characterised in that: the preparation side of the porous-starch
Method are as follows:
S110, cassava ative starch and water are added in reaction vessel and stir to get suspension；
S120, by suspension 40~60 DEG C at a temperature of, while stirring heating make starch gelatinization, obtain gelatinized starch；
S130, it is freezed at a temperature of gelatinized starch is placed in -5 DEG C；
S140, the sample after freezing is taken out, acetone is added and is stirred, impregnates, then rotated and steam under the conditions of 50-80 DEG C
Porous-starch can be obtained in hair, re-dry, grinding.
5. biodegradable breathable composite film according to claim 1, it is characterised in that: the PE resin is that blown film grade is low
Density polyethylene.
6. biodegradable breathable composite film according to claim 1, it is characterised in that: the PBAT resin is to gather oneself two
Acid/butylene terephthalate.
7. biodegradable breathable composite film according to claim 1, it is characterised in that: the lubricant is PE wax, firmly
At least one of resin acid, EBS.
8. biodegradable breathable composite film according to claim 1, it is characterised in that: the compatilizer is POE-g-
At least one of MAH, PE-g-MAH, EVA-g-MAH；The weather resisting agent is antioxidant 168 and ultraviolet absorbing agent UV531
Mixture.
9. biodegradable breathable composite film according to claim 1, it is characterised in that: the opening agent is titanium dioxide
At least one of inorganic opening agent of silicon, talcum powder.
10. a kind of preparation method of -9 described in any item biodegradable breathable composite films according to claim 1, feature exist
In, comprising the following steps:
Step 1: denaturation porous-starch, PE resin, PBAT resin, compatilizer, lubricant, weather resisting agent and opening agent are mixed simultaneously
Discharging, obtains biodegradable breathable composite film mixture；
Step 2: after the biodegradable breathable composite film mixture is carried out melt blending in mixer, in twin-screw
It squeezes out machine and carries out melting extrusion, obtain biodegradable breathable composite film modified materials；
It is filmed Step 3: the biodegradable breathable composite film modified materials are added in inflation film manufacturing machine, obtains the biology
Degradable breathable composite film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910842929.1A CN110511544B (en) | 2019-09-06 | 2019-09-06 | Biodegradable breathable composite membrane and preparation method thereof |
Applications Claiming Priority (1)
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Denomination of invention: A biodegradable breathable composite membrane and its preparation method Effective date of registration: 20230228 Granted publication date: 20210611 Pledgee: Agricultural Bank of China Limited Mingxi County Sub-branch Pledgor: Fujian Sanming Beststarch Great material Co.,Ltd. Registration number: Y2023350000057 |