CN101935440A - Starch/polylactic acid antibacterial activity packaging material as well as preparation method and application thereof - Google Patents
Starch/polylactic acid antibacterial activity packaging material as well as preparation method and application thereof Download PDFInfo
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- CN101935440A CN101935440A CN2010102919417A CN201010291941A CN101935440A CN 101935440 A CN101935440 A CN 101935440A CN 2010102919417 A CN2010102919417 A CN 2010102919417A CN 201010291941 A CN201010291941 A CN 201010291941A CN 101935440 A CN101935440 A CN 101935440A
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- starch
- polylactic acid
- microbial activity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92885—Screw or gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
Abstract
The invention discloses a starch/polylactic acid blending antibacterial activity packaging material with the antibacterial activity control release function, as well as a preparation method and application thereof. The proper hydrophilic and hydrophobic property of the starch/polylactic acid blending material is utilized to regulate the migration dissolution rate of an antibacterial agent, and therefore, the antibacterial material combines the antibacterial timeliness and the antibacterial long effectiveness and prolongs the food shelf life. The antibacterial packaging material comprises the following compositions in percentage by weight: 30-40 percent of starch, 2-10 percent of antibacterial agent, 45-60 percent of polylactic acid and 0.01-1 percent of compatibilizer. The compositions are sequentially added into a twin-screw extruder from different feeding holes, the blended materials are treated by plasticization, kneading and reaction blending to prepare the starch/polylactic acid blending antibacterial activity packaging material. On the one hand, the material fulfills the function of antibacterial activity control release and combines the antibacterial timeliness and the antibacterial long effectiveness, and on the other hand, the material has the advantages of excellent mechanical property and wider application range and can be used for high water activity food corrosion and bacteria prevention.
Description
Technical field
The present invention relates to food Active Packaging Materials field, be particularly related to a kind of have anti-microbial activity control-release function, complete biodegradable, can be used for high-moisture activity food and have antibiotic ageing and long-lasting starch/poly(lactic acid) anti-microbial activity wrapping material concurrently, and relate to this this preparation methods and application thereof.
Background technology
The anti-microbial activity packing is a kind of novel package theory that proposes the nineties in last century, it is that antiseptic-germicide is added in the superpolymer wrapping material, produce anti-microbial activity by antiseptic-germicide, to reduce or the alternative method that in food, directly adds preservative substance, keep stable antiseptic-germicide concentration and reach antibiotic rot-resistant purpose at package interior, food can be preserved the long period.The anti-microbial activity wrapping material have the incomparable advantage of Traditional Packing material, and application and development prospect are very wide.
Over past ten years, China's food safety accident emerges in an endless stream, and there is very big hidden danger in food safety.How food resists the erosion of microorganism in the circulation preservation, especially be beneficial to fresh meat, fresh fruit of vegetables, meat sausage product of microbial growth etc., this based food is anti-corrosive antibacterial under the prerequisite that keeps quality how, extends the shelf life, and all be food antimicrobial difficult point all the time.To the universality of this anti-microbial activity packing, caused people's extensive concern with its antimicrobial significance and application.
Present existing food anti-microbial activity packing mainly is divided into two classes, and a class is a base material with traditional petroleum-based plastics, as polyethylene, polypropylene antibacterial plastics; Another kind of is base material with the renewable resources macromolecular material, as anti-biotic materials such as starch, protein, chitosans.For the former, because the processing temperature height of base material, antiseptic-germicide is normal to adopt inorganic antiseptics such as silver to Heat stability is good, zinc.Antiseptic-germicide is embedded in the surperficial and inner of material, does not move stripping, mainly produces anti-microbial activity by the material obstruct or with tight contact of food.Though it is not anti-microbial activity can be kept for a long time, antibiotic ageing good.In addition, because this class material source is in the Nonrenewable resources oil, it is difficult to degraded and causes serious environmental pollution in physical environment.Therefore, develop biodegradable Active Packaging Materials with the renewable resources macromolecular material in recent years and receive global unprecedented concern.But for this class material, because the mechanical property of base material is not strong, the general coating film that only is used as food.Angle for food safety, the antiseptic-germicide of anti-microbial activity wrapping material uses natural antibacterial agents such as chitosan, bacteriocin, lysozyme more at present, move to the surface and the inner anti-microbial activity that produces of food by the antiseptic-germicide stripping, have significant antibiotic ageing, but owing to antiseptic-germicide easily loses anti-microbial activity with the food component interaction, anti-microbial activity can't long term maintenance.
For the problems referred to above, can solve the sustained release of antiseptic-germicide by base material.At present in the renewable resources macromolecular material, because the material of starch and polylactic acid blend gained can be avoided the shortcoming of material separately, and the applied cost that has excellent mechanical property and be suitable for, therefore, starch and polylactic acid blend material become the more and most possible Biodegradable Materials that comparatively fast enters practical application of research.Starch is a kind of hydrophilic material, and meeting behind the water can stripping from material, can provide condition for the stripping migration of antiseptic-germicide.Poly(lactic acid) is a kind of hydrophobic material, can intercept the infiltration of water molecules to material internal; By regulating both ratio, structural modification degree and the degree of scatter of antiseptic-germicide in two-phase in intermingling material, just can regulate and control the release stripping rate of migration of antiseptic-germicide.
But then, the difference on starch and the poly(lactic acid) thermodynamic property makes its interface compatibility very poor, has reduced the mechanical property of intermingling material.To this, the applicant is through exploring, succeeded in developing the forcing machine (ZL 200820202485.2) that is used for starch producing/poly(lactic acid) compatibilizing and co-mixing material, and develop the novel method (a kind of starch/poly(lactic acid) compatibilizing and co-mixing material and the manufacture method of corresponding product, application number: 200810218680.9), obtained the good mechanical performance.
Relevant is base material with starch/polylactic acid blend material, and the research work that preparation has the antibiotic ageing and long-lasting food anti-microbial activity wrapping material of having concurrently of anti-microbial activity control-release function yet there are no report at home and abroad.
Summary of the invention
In order to solve the weak point of present anti-microbial activity wrapping material, and the anti-corrosive antibacterial difficult problem of solution high-moisture activity food, primary and foremost purpose of the present invention provides a kind of have anti-microbial activity control-release function, complete biodegradable, and it is antibiotic and have antibiotic ageing and long-lasting starch/polylactic acid blend anti-microbial activity wrapping material concurrently to can be used in high-moisture activity food antiseptic.
Another object of the present invention provides the preparation method of above-mentioned Active Packaging Materials.
A further object of the present invention provides the application of above-mentioned Active Packaging Materials.
Purpose of the present invention realizes by following technical proposals:
A kind of starch/polylactic acid blend Active Packaging Materials with anti-microbial activity control-release function is by following component: the antiseptic-germicide reactive blending of the compatilizer and 2%～10% (weight percent) of the poly(lactic acid), 0.01%～1% (weight percent) of the starch of 30～44% (weight percents), 45～60% (weight percent) and getting.
Described starch is W-Gum, yam starch, high chain starch, tapioca (flour), wheat starch etc., its moisture content 0.5-1%.
Described poly(lactic acid) is the lactic acid that obtained by saccharic class plants such as corn, beets through polycondensation or rac-Lactide ring-opening polymerization and gets that its weight-average molecular weight is 151000D.
Described antiseptic-germicide comprises the natural antibacterial agent that chitosan, nisin, N,O-Diacetylmuramidase, potassium sorbate etc. are commonly used.
Described compatilizer is a ditan-4,4-two different acid esters.
For the starch/polylactic acid blend Active Packaging Materials that realizes the present invention better, make preparing has the antiseptic-germicide control-release function and has concurrently antibiotic ageingly and long-lasting, the weight ratio of described starch and poly(lactic acid) is (9～14): 21; The antiseptic-germicide addition is preferably 5～10% (weight percents).
A kind of preparation method with starch/polylactic acid blend Active Packaging Materials of anti-microbial activity control-release function, be at the twin screw extruder that utilizes starch/poly(lactic acid) compatibilizing and co-mixing material (ZL 200820202485.2) and a kind of starch/poly(lactic acid) compatibilizing and co-mixing material and manufacture method (application number: on the basis 200810218680.9), by control starch, antiseptic-germicide, compatilizer, reinforced order in twin screw extruder such as poly(lactic acid) reaches the control to the disperse phase of antiseptic-germicide and compatilizer, thereby when improving starch and poly(lactic acid) reactive blending effect, reach the sustained release of antiseptic-germicide and the matching between the material mechanical performance, the starch that makes/polylactic acid blend Active Packaging Materials can be used for high-moisture activity packaging material for food, has the completely biodegradable energy.
Specifically may further comprise the steps:
(1) starch plasticizing
Starch dry to moisture content be 1%, the glycerine that adds starch weight 1-2%, mix, from the twin screw extruder first charging opening position charging, carry through the screw rod transmission section, preplasticizing under the condition of screw rod indirect heating, the preplasticizing temperature is 140 ℃, through starch further plasticizing under the effect of mediating threaded block of preplasticizing, plasticization temperature is 170 ℃;
(2) antiseptic-germicide adds
After the starch plasticizing, add the powder antiseptic-germicide from the second charging opening position, antiseptic-germicide and plasticized starch melt are disperseed under the effect of shearing force, the temperature of this process is controlled at 150 ℃;
(3) poly(lactic acid) adds
Add a kind of starch/poly(lactic acid) compatibilizing and co-mixing material and the manufacture method (application number: 200810218680.9) Zhi Bei poly(lactic acid) and compatilizer blend pellet that adopts the applicant from the 3rd charging opening position, mix under the effect of shearing force with plasticized starch, antiseptic-germicide, disperse, plastify the starch/polylactic acid blend Active Packaging Materials that obtains having the anti-microbial activity control-release function, the temperature of this process is controlled at 150 ℃.
Described starch rate of feeding: 100～400min
-1, poly(lactic acid) rate of feeding: 200～500min
-1, compatilizer rate of feeding: 10～200cm
3/ min, the rate of feeding 100～300min of antiseptic-germicide
-1
The above-mentioned starch/application of polylactic acid blend Active Packaging Materials in the wrapping material of high-moisture activity food with anti-microbial activity control-release function.
The present invention compared with prior art has following advantage and beneficial effect:
(1) the present invention has improved the complete processing of starch/polylactic acid blend material, the melt zone temperature that the anti-microbial activity wrapping material is extruded add man-hour is reduced to 150 ℃ by 170 ℃, effectively avoided processing temperature too high, ensured that material possesses anti-microbial activity the active influence of antiseptic-germicide.
(2) the present invention will be controlled in the preparation that the slowly-releasing principle is applied to the anti-microbial activity wrapping material, suitable hydrophilic and hydrophobic is regulated and control the migration dissolution rate of antiseptic-germicide (starch content is in the intermingling material, and its contact angle to water is 75～80 °) at 30%～44% o'clock to utilize starch/polylactic acid blend material.Find that by test when anti-biotic material was soaked in the water, the stripping of antiseptic-germicide migration was divided into two stages, it at first is the quick stripping stage, in 2 hours, the solubility rate of antiseptic-germicide can reach 15%, and this is the migration stripping that is scattered in the antiseptic-germicide on intermingling material surface; Next is the slow stripping stage, and the solubility rate of antiseptic-germicide increases to 45% gradually after 72 hours, and this is the migration stripping that is embedded in the chitosan of intermingling material inside.This stripping law has guaranteed that on the one hand anti-biotic material is when touching food, the stripping antiseptic-germicide produces anti-microbial activity rapidly, on the other hand again can be in the long term slow stable delivery of antimicrobials, guaranteed that the anti-microbial activity of material can be kept certain hour.The anti-microbial activity wrapping material of this invention preparation are compared with traditional polyethylene, polypropylene antibacterial plastics, have concurrently antibiotic ageing and long-lasting.
(3) the anti-microbial activity wrapping material of the present invention's preparation possess certain mechanical property, thermal characteristics and barrier property.Find that by test the tensile strength of material is 15-17MPa, tensile modulus is 1.2-1.5GPa, and elongation at break is 5-10%, and second-order transition temperature is 45-60 ℃.These parameter indicatings, anti-biotic material can satisfy the requirement of some packaging materials for food, compares with other anti-biotic material such as starch base, protein film, chitosan film, and range of application is more extensive.
(4) the anti-microbial activity wrapping material of the present invention's preparation; its main ingredient is starch, poly(lactic acid) and natural antibacterial agent; these materials all come from renewable resources; can biological degradation; environmental protection; the strategy and policy that meet national sustainable development, oil crisis and plastic pollution are significant for solving.
Description of drawings
Fig. 1 is the cross-section morphology figure before and after the stripping of anti-microbial activity wrapping material among the embodiment one, and left side figure is cross-section morphology figure before the stripping, and right figure is cross-section morphology figure after the stripping.
Fig. 2 is the migration dissolution rate figure of chitosan from the anti-microbial activity wrapping material among the embodiment one.
Fig. 3 be among the embodiment one anti-microbial activity wrapping material paster behind the nutrient agar of colon bacillus and streptococcus aureus, the situation map of the inhibition zone of material periphery, left side figure is the colon bacillus nutrient agar, and right figure is the nutrient agar of streptococcus aureus.
Embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is described in further detail, but embodiment of the present invention is not limited in this.
Embodiment one:
Poly(lactic acid) (REVODE101, Zhejiang Hisun Biomaterials Co., Ltd): 60kg
W-Gum (food grade, foodstuffs industry company limited of Huanglong): 30kg, starch dry to moisture content be 0.5%
Ditan-4,4-two different acid esters (chemical pure, the Xiamen City aigret sends out Trade Development company limited): 0.01kg
Chitosan (food grade, deacetylation 90%, Jinan Haidebei Marine Organism Engineering Co., Ltd.): 9.99kg.
The preparation method is as follows:
(1) starch plasticizing
Starch dry to moisture content be 0.5%, (glycerine/starch w/w), mixes to add 1-2% glycerine, from the twin screw extruder first charging opening position charging, carry through the screw rod transmission section, preplasticizing under the condition of screw rod indirect heating, the preplasticizing temperature is 140 ℃, starch further plasticizing under the effect of mediating threaded block through preplasticizing, plasticization temperature is 170 ℃, screw rod external diameter: 40mm, screw speed: 200～400min
-1, starch rate of feeding: 100～400min
-1
(2) antiseptic-germicide adds
After the starch plasticizing, add powder antiseptic-germicide chitosan from the second charging opening position, chitosan and plasticized starch melt are disperseed under the effect of shearing force, the temperature of this process is controlled at 150 ℃, the rate of feeding 100～300min of chitosan
-1
(3) poly(lactic acid) adds
Add employing a kind of starch/poly(lactic acid) compatibilizing and co-mixing material and manufacture method (application number: 200810218680.9) Zhi Bei poly(lactic acid) and compatilizer blend pellet that the applicant developed from the 3rd charging opening position, under the effect of shearing force, mix, disperse, plastify the starch/poly(lactic acid) anti-microbial activity wrapping material that obtain having the anti-microbial activity control-release function with plasticized starch, antiseptic-germicide, the temperature of this process is controlled at 150 ℃, poly(lactic acid) rate of feeding: 200～500min
-1, compatilizer rate of feeding: 10～200cm
3/ min.
According to the speed of screw speed and starch feeding, regulate poly(lactic acid) feeding quantity, the size of microprocessor pump drive and the add-on of antiseptic-germicide, to guarantee each components contents of filling a prescription.
The temperature distribution in each district of forcing machine is:
| The district | One | Two | Three | Four | Five | Six | Seven | Eight |
| Temperature (℃) | 140 | 170 | 170 | 165 | 160 | 150 | 150 | 120 |
Detected result by the anti-biotic material of above-mentioned condition manufacturing is shown in Table 1.The blending antibacterial active material is placed water 24h, utilize the cross-section morphology of scanning electron microscopic observation stripping front and back, the results are shown in shown in Figure 1, as seen from Figure 1, hole appears in the section of anti-biotic material after the stripping, and this is that hydrophilic starch and chitosan stripping cause, show in water soak after, starch and chitosan can be from the inner strippings of anti-biotic material, and this just provides condition for the anti-microbial activity of anti-biotic material.
With the anti-biotic material paster in nutrient agar surface (agar/water=1.5%, w/w), the solubility rate of test chitosan in the environment of 90% relative humidity, the results are shown in shown in Figure 2, as seen from Figure 2, the stripping of chitosan is divided into two stages: the quick stripping of initial period, in preceding 2 hours, solubility rate just can reach 15%, and this is the stripping that is scattered in the chitosan of material surface; Be the slow stripping stage then, along with the prolongation of time, dissolution rate reduces, and solubility rate slowly increases, and solubility rate is 45% after 72 hours.Show that hydrophilic chitosan can slowly move stripping from material internal.
With the anti-biotic material paster in colon bacillus (Scherichia coli, ATCC 25922, Microbiological Lab of Ji'nan University) and streptococcus aureus (Staphylococcus aureus, ATCC 6538, Microbiological Lab of Ji'nan University) nutrient agar on, investigate its anti-microbial activity, the results are shown in shown in Figure 3, can significantly be observed by Fig. 3, the material periphery has the existence of obvious inhibition zone, shows that the anti-microbial activity of material is remarkable.According to the regulation of the light industry standard QBT 2591-2003 of the People's Republic of China (PRC) " the anti-microbial property test method and the antibacterial effect of antibiotic plastic ", antibiotic rate surpasses 90%, has significant anti-microbial activity.
The anti-microbial activity wrapping material of preparing are tested mechanical property, thermal characteristics, barrier property and degradation property through national plastic products quality supervision center, the results are shown in Table shown in 1, as can be seen from Table 1, material possesses the characteristics of certain mechanics, thermal characteristics, complete biodegradable, can meet some food to the wrapping material performance demands.
Embodiment two
Each component in the intermingling material is adjusted into:
Poly(lactic acid) (REVODE101, Zhejiang Hisun Biomaterials Co., Ltd): 45kg
Yam starch (food grade, limited liability company of the San Jiang of Qinghai Province group): 44kg, dry to moisture content be 1.0%
Ditan-4,4-two different acid esters (chemical pure, the Xiamen City aigret sends out Trade Development company limited): 1kg
Nisin (food grade, the Ai Biou of Xiamen City Bioisystech Co., Ltd): 10kg.
The preparation method is with embodiment one.
(1) prepared anti-biotic material is used for live fresh pork (ten thousand good supermarkets, China Resources, Guangzhou, packing down together), one week of storage in 4 ℃ of environment, according to the method test colon bacillus of regulation and the quantity of streptococcus aureus among standard GB/T4789.17-2003 " microbiological test of food hygiene meat and meat product check ", the results are shown in Table shown in 2.
(2) prepared anti-biotic material is used for fresh chicken (ten thousand good supermarkets, China Resources, Guangzhou, packing down together), one week of storage in 4 ℃ of environment, according to the method test colon bacillus of regulation and the quantity of streptococcus aureus among standard GB/T4789.17-2003 " microbiological test of food hygiene meat and meat product check ", the results are shown in Table shown in 2.
(3) it is (consistent with existing process of producation of Ham intestines preparation method prepared anti-biotic material to be used to make by oneself ham sausage (not containing sanitas), for the ease of investigating the antibacterial effect of material, adding preservative agent not) packing, one week of storage in 4 ℃ of environment, according to the method test colon bacillus of regulation and the quantity of streptococcus aureus among standard GB/T4789.17-2003 " microbiological test of food hygiene meat and meat product check ", the results are shown in Table shown in 2.
As can be seen from Table 2, material has significant antibiotic ageingly and long-lasting when practical application, can guarantee the microorganism hygienic safety of meat product.
Embodiment three
Each component in the intermingling material is adjusted into:
Poly(lactic acid) (REVODE101, Zhejiang Hisun Biomaterials Co., Ltd): 60kg
High chain starch (Hylon V, food grade, national of the United States's starch company): 35kg, starch dry to moisture content be 0.5%
Ditan-4,4-two different acid esters (chemical pure, the Xiamen City aigret sends out Trade Development company limited): 0.05kg
N,O-Diacetylmuramidase (lysozyme, food grade, Jinan rising sun sunlight wound Bioisystech Co., Ltd): 4.95kg.
The preparation method is with embodiment one.
The test of anti-microbial activity wrapping material mechanical property, thermal characteristics and barrier property with preparing the results are shown in Table shown in 2.The packing that material is used for live fresh pork, fresh chicken and self-control ham sausage (not containing sanitas), the quantity of total number of bacterial colony and colon bacillus and streptococcus aureus in the packing Pretesting food, after storing a week in 4 ℃ of environment, the quantity of total number of bacterial colony and colon bacillus and streptococcus aureus the results are shown in Table shown in 3 in the test food.As can be seen from Table 3, material has significant antibiotic ageing and long-lasting, can guarantee the microorganism hygienic safety of meat product.
Embodiment four
Each component in the intermingling material is adjusted into:
Poly(lactic acid) (REVODE101, Zhejiang Hisun Biomaterials Co., Ltd): 53kg
Tapioca (flour) (food grade, the bright positive starch factory in Guangxi): 44kg, starch dry to moisture content be 1.0%
Ditan-4,4-two different acid esters (chemical pure, the Xiamen City aigret sends out Trade Development company limited): 1kg
Potassium sorbate (food grade, Henan Province flavor Supreme Being foodstuff additive company limited): 10kg.
The preparation method is with embodiment one.
The test of anti-microbial activity wrapping material mechanical property, thermal characteristics and barrier property with preparing the results are shown in Table shown in 2.The packing that material is used for live fresh pork, fresh chicken and self-control ham sausage (not containing sanitas), one week of storage in 4 ℃ of environment, the quantity of colon bacillus and streptococcus aureus in the test food, the results are shown in Table shown in 4, as can be seen from Table 4, material has significant antibiotic ageing and long-lasting, can guarantee the microorganism hygienic safety of meat product.
Table 1
Table 2
----expression does not detect
Table 3
----expression does not detect
Table 4
----expression does not detect
The foregoing description is a preferred implementation of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (10)
1. starch/polylactic acid blend the Active Packaging Materials with anti-microbial activity control-release function is characterized in that by following component reaction blend preparation: the compatilizer of the poly(lactic acid) and 0.01%～1% (weight percent) of the antiseptic-germicide, 45～60% (weight percent) of the starch of 30～44% (weight percents), 2%～10% (weight percent).
2. a kind of starch/polylactic acid blend Active Packaging Materials according to claim 1 with anti-microbial activity control-release function, it is characterized in that: described starch is W-Gum, yam starch, high chain starch, tapioca (flour), wheat starch, and its moisture content is 0.5-1%.
3. a kind of starch/polylactic acid blend Active Packaging Materials with anti-microbial activity control-release function according to claim 1, it is characterized in that: described antiseptic-germicide comprises chitosan, nisin, N,O-Diacetylmuramidase or potassium sorbate.
4. a kind of starch/polylactic acid blend Active Packaging Materials according to claim 1 with anti-microbial activity control-release function, it is characterized in that: described poly(lactic acid) is the lactic acid that obtained by saccharic class plant through polycondensation or rac-Lactide ring-opening polymerization and gets that its weight-average molecular weight is 151000D.
5. a kind of starch/polylactic acid blend Active Packaging Materials with anti-microbial activity control-release function according to claim 1, it is characterized in that: described compatilizer is a ditan-4,4-two different acid esters.
6. a kind of starch/polylactic acid blend Active Packaging Materials with anti-microbial activity control-release function according to claim 1 is characterized in that: the weight ratio of described starch and poly(lactic acid) is (9～14): 21.
7. a kind of starch/polylactic acid blend Active Packaging Materials with anti-microbial activity control-release function according to claim 1, it is characterized in that: described antiseptic-germicide addition is 5～10% (weight percents).
8. according to each described a kind of preparation method of claim 1～7, it is characterized in that comprising the steps: with starch/polylactic acid blend Active Packaging Materials of anti-microbial activity control-release function
(1) starch plasticizing
Starch dry to moisture content be 0.5-1%, the glycerine that adds starch weight 1-2%, mix, from the twin screw extruder first charging opening position charging, carry through the screw rod transmission section, preplasticizing under the condition of screw rod indirect heating, the preplasticizing temperature is 140 ℃, starch through preplasticizing carries out single stage plastication under the effect of mediating threaded block, plasticization temperature is 170 ℃;
(2) antiseptic-germicide adds
After the starch plasticizing, add the powder antiseptic-germicide from the second charging opening position, antiseptic-germicide and plasticized starch melt are disperseed under the effect of shearing force, the temperature of this process is controlled at 150 ℃;
(3) poly(lactic acid) adds
Add poly(lactic acid) and compatilizer from the 3rd charging opening position, mix under the effect of shearing force with plasticized starch, antiseptic-germicide, disperse, plastify the starch/polylactic acid blend Active Packaging Materials that obtains having the anti-microbial activity control-release function, the temperature of this process is controlled at 150 ℃.
9. a kind of preparation method with starch/polylactic acid blend Active Packaging Materials of anti-microbial activity control-release function according to claim 8 is characterized in that: described starch rate of feeding: 100～400min
-1, the rate of feeding 100～300min of antiseptic-germicide
-1, poly(lactic acid) rate of feeding: 200～500min
-1, compatilizer rate of feeding: 10～200cm
3/ min.
10. according to each described a kind of starch/polylactic acid blend Active Packaging Materials application in the wrapping material of high-moisture activity food of claim 1～7 with anti-microbial activity control-release function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN102219934A (en) * | 2011-05-10 | 2011-10-19 | 吉林农业大学 | Preparation method of edible starchiness packaging film by using xylitol as plasticizer |
| CN103159983A (en) * | 2013-03-13 | 2013-06-19 | 同济大学 | Novel beta-cyclodextrin host-guest complex antibacterial starch-base plastic and method for preparing same |
| CN104629279A (en) * | 2015-02-03 | 2015-05-20 | 安徽民祯生物工程有限公司 | Bacteriocin bacteriostatic fresh-keeping biological composite film |
| CN105754150A (en) * | 2016-04-08 | 2016-07-13 | 苏州市鼎立包装有限公司 | Degradable medical packaging material and preparation method thereof |
| CN106046727A (en) * | 2016-08-05 | 2016-10-26 | 宁波金特信钢铁科技有限公司 | Preparation method of nanometer level antibacterial plastic product |
| CN106854349A (en) * | 2016-12-26 | 2017-06-16 | 海宁市佳峰彩印包装有限公司 | A kind of environment-protecting asepsis food color printing packaging film and preparation method thereof |
| CN107022804A (en) * | 2017-03-17 | 2017-08-08 | 宁波三邦超细纤维有限公司 | Fire-retardant degradable antibacterial polylactic acid elastomer and preparation method thereof |
| CN107828086A (en) * | 2017-11-03 | 2018-03-23 | 苏州甫众塑胶有限公司 | A kind of antimicrobial form Active Packaging Materials and its preparation technology |
| CN108677615A (en) * | 2018-05-07 | 2018-10-19 | 句容市兴武包装有限公司 | A kind of food wrapper oil-proofing agent and preparation method thereof |
| CN109735076A (en) * | 2019-01-23 | 2019-05-10 | 哈尔滨知明科技有限公司 | A kind of preparation method of high-performance biology base/polylactic acid Wholly-degradable material |
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| CN110861381A (en) * | 2019-11-21 | 2020-03-06 | 上海海洋大学 | Antibacterial, shockproof and moisture-absorbing degradable food fresh-keeping pad and preparation method thereof |
| CN111533960A (en) * | 2020-06-08 | 2020-08-14 | 东莞职业技术学院 | Environment-friendly degradable plastic packaging bag |
| CN111548535A (en) * | 2020-05-25 | 2020-08-18 | 常州龙骏天纯环保科技有限公司 | Bio-based fresh package suitable for low-temperature condition and preparation method thereof |
| CN111688317A (en) * | 2020-06-28 | 2020-09-22 | 四川汇利实业有限公司 | Preparation method of medicinal packaging composite material |
| CN112876818A (en) * | 2020-12-01 | 2021-06-01 | 浙江大学台州研究院 | Biodegradable antibacterial straw and preparation method thereof |
| CN113234307A (en) * | 2021-06-29 | 2021-08-10 | 山东农业大学 | Full-degradable antibacterial food packaging film and preparation method thereof |
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| CN102219934A (en) * | 2011-05-10 | 2011-10-19 | 吉林农业大学 | Preparation method of edible starchiness packaging film by using xylitol as plasticizer |
| CN103159983A (en) * | 2013-03-13 | 2013-06-19 | 同济大学 | Novel beta-cyclodextrin host-guest complex antibacterial starch-base plastic and method for preparing same |
| CN104629279A (en) * | 2015-02-03 | 2015-05-20 | 安徽民祯生物工程有限公司 | Bacteriocin bacteriostatic fresh-keeping biological composite film |
| CN104629279B (en) * | 2015-02-03 | 2016-04-06 | 安徽民祯生物工程有限公司 | A kind of bacteriocin bacteriostasis, preservation biological composite membrane |
| CN105754150A (en) * | 2016-04-08 | 2016-07-13 | 苏州市鼎立包装有限公司 | Degradable medical packaging material and preparation method thereof |
| CN106046727A (en) * | 2016-08-05 | 2016-10-26 | 宁波金特信钢铁科技有限公司 | Preparation method of nanometer level antibacterial plastic product |
| CN106854349A (en) * | 2016-12-26 | 2017-06-16 | 海宁市佳峰彩印包装有限公司 | A kind of environment-protecting asepsis food color printing packaging film and preparation method thereof |
| CN107022804A (en) * | 2017-03-17 | 2017-08-08 | 宁波三邦超细纤维有限公司 | Fire-retardant degradable antibacterial polylactic acid elastomer and preparation method thereof |
| CN107022804B (en) * | 2017-03-17 | 2019-06-25 | 宁波三邦超细纤维有限公司 | Fire-retardant degradable antibacterial polylactic acid elastomer and preparation method thereof |
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| CN108677615A (en) * | 2018-05-07 | 2018-10-19 | 句容市兴武包装有限公司 | A kind of food wrapper oil-proofing agent and preparation method thereof |
| CN109735076A (en) * | 2019-01-23 | 2019-05-10 | 哈尔滨知明科技有限公司 | A kind of preparation method of high-performance biology base/polylactic acid Wholly-degradable material |
| CN110549717A (en) * | 2019-08-27 | 2019-12-10 | 广西华沃特生态肥业股份有限公司 | packaging material of environment-friendly forest fertilizer, preparation method and packaging method thereof |
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| CN110861381A (en) * | 2019-11-21 | 2020-03-06 | 上海海洋大学 | Antibacterial, shockproof and moisture-absorbing degradable food fresh-keeping pad and preparation method thereof |
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| CN110862582B (en) * | 2019-11-29 | 2021-03-23 | 河南农业大学 | Hydrophobic organic/inorganic composite preservative film for meat products |
| CN110862582A (en) * | 2019-11-29 | 2020-03-06 | 河南农业大学 | Hydrophobic organic/inorganic composite preservative film for meat products |
| CN111548535A (en) * | 2020-05-25 | 2020-08-18 | 常州龙骏天纯环保科技有限公司 | Bio-based fresh package suitable for low-temperature condition and preparation method thereof |
| CN111533960A (en) * | 2020-06-08 | 2020-08-14 | 东莞职业技术学院 | Environment-friendly degradable plastic packaging bag |
| CN111688317A (en) * | 2020-06-28 | 2020-09-22 | 四川汇利实业有限公司 | Preparation method of medicinal packaging composite material |
| CN112876818A (en) * | 2020-12-01 | 2021-06-01 | 浙江大学台州研究院 | Biodegradable antibacterial straw and preparation method thereof |
| CN113234307A (en) * | 2021-06-29 | 2021-08-10 | 山东农业大学 | Full-degradable antibacterial food packaging film and preparation method thereof |
| CN114163793A (en) * | 2021-11-29 | 2022-03-11 | 浙江大学台州研究院 | Chitosan antibacterial outer surface modified polylactic acid extrusion wire and preparation method thereof |
| CN114163806A (en) * | 2021-11-29 | 2022-03-11 | 浙江大学台州研究院 | Antibacterial polysaccharide outer surface modified TPU medical catheter and preparation method thereof |
| CN114163805A (en) * | 2021-11-29 | 2022-03-11 | 浙江大学台州研究院 | Alginate antibacterial outer surface modified TPU extruded wire and preparation method thereof |
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Application publication date: 20110105 Assignee: GUANGDONG ZHONGQING FENGTAI BIOCHEMICAL CO., LTD. Assignor: South China University of Technology Contract record no.: 2019440000120 Denomination of invention: Starch/polylactic acid antibacterial activity packaging material as well as preparation method and application thereof Granted publication date: 20121031 License type: Exclusive License Record date: 20190620 |