CN103554553A - Rice starch based biodegradable packaging film and preparation method thereof - Google Patents
Rice starch based biodegradable packaging film and preparation method thereof Download PDFInfo
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- CN103554553A CN103554553A CN201310511057.3A CN201310511057A CN103554553A CN 103554553 A CN103554553 A CN 103554553A CN 201310511057 A CN201310511057 A CN 201310511057A CN 103554553 A CN103554553 A CN 103554553A
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- starch rice
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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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- Biological Depolymerization Polymers (AREA)
- Wrappers (AREA)
- Cereal-Derived Products (AREA)
Abstract
The invention discloses a rice starch based biodegradable packaging film and a preparation method thereof. The rice starch based biodegradable packaging film is prepared from the following raw materials in percentage by weight: 15-55% of rice starch, 0.01-0.1% of alpha-amylase, 5-15% of chitosan, 2-10% of sodium benzoate, 2-10% of potassium sorbate, 2-10% of propionic anhydride, 10-55% of polyvinyl alcohol, 0.01-0.05% of a crosslinking agent, and 0.8-10% of a plasticizer and 15-30% of distilled water. The invention also discloses a preparation method of the rice starch based biodegradable packaging film. The rice starch based biodegradable packaging film disclosed by the invention is strong in antibacterial activity, good in water resistance and acid and alkali resistance, and high in strength, and after being disposed, can be decomposed into carbon dioxide and water by microorganisms in environments.
Description
Technical field
The present invention relates to a kind of biodegradable packing film and preparation method thereof, especially relate to a kind of Starch rice based, biodegradable packing film and preparation method thereof.
Background technology
At present, the packing film that in daily life, people use is mainly polyethylene or polyvinyl chloride plastic film, and these plastic films, owing to being difficult to be decomposed by soil microorganisms and absorbed by root system of plant, after life-time service, a large amount of plastics films are discarded in environment, to environment, have caused detrimentally affect.And these polyethylene or polyvinyl chloride plastic film are without bacteriostasis, adopt the food of this film packing to be difficult to long-time preservation, carry out hidden danger to food securing band.All the time, people are by the different ways performance of plastic film for wrapping of making the life better, but all can not fundamentally solve the biodegradable problem of plastics film.On the other hand, in the rice course of processing, inevitably produce a large amount of joints and crack rice, these joints are cracked rice and are contained abundant starch, and due to the restriction of technology, the starch that these joints are cracked rice is not fully utilized, and causes the waste of resource at present.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes the deficiencies in the prior art, and a kind of Starch rice based, biodegradable packing film can microorganism decomposing and preparation method thereof is provided.
The technical scheme that the present invention solves its technical problem employing is:
A kind of Starch rice based, biodegradable packing film, raw material by following weight percent is made: the preferred 20-35% of Starch rice 15-55%(, more preferably 25-30%), the preferred 0.03-0.06% of α-amylase 0.01-0.1%(, preferred enzyme vigor 40000-60000U/g), the preferred 7-11% of chitosan 5-15%(, more preferably 8-10%), the preferred 4-6% of Sodium Benzoate 2-10%(), the preferred 2.5-4.0% of potassium sorbate 2-10%(), the preferred 5-6% of propionic anhydride 2-10%(), the preferred 12-27% of polyvinyl alcohol (PVA) 10-55%(, more preferably 17-22%), the preferred 0.02-0.04% of linking agent 0.01-0.05%(), the preferred 1-2% of softening agent 0.8-10%() and the preferred 20-25% of distilled water 15-30%().
Described chitosan, Sodium Benzoate and potassium sorbate are antibacterial substance.
Described linking agent can be oxalic dialdehyde, the aldehydes such as mda, glutaraldehyde.
Described softening agent preferably glycerine, ethylene glycol or polyoxyethylene glycol etc.
The preparation method of the present invention's Starch rice based, biodegradable packing film, comprises the following steps:
(1) preparation α-amylase liquid: by prepared distilled water in two, add α-amylase in a distilled water therein, stir, obtain α-amylase liquid;
(2) step (1) gained α-amylase liquid is joined in reactor, be preheating to 48-56 ℃, Starch rice is added in reactor, stir on one side, add Starch rice on one side; Then reactor is placed in to the thermostat container of 48-56 ℃, insulation enzymolysis 4-6 h, when Starch rice glue can stir, reactor is placed in boiling water bath, outer bath continues in heat-processed, Starch rice glue is further thinning, until during 93-98 ℃ of reactant core temperature in reaction vessel, stop water-bath, now Starch rice is become the water-sol by enzymolyzing alpha-amylase, then adds propionic anhydride, at 60-70 ℃ of esterification 40-50min, then in mixing solutions, add chitosan, Sodium Benzoate, potassium sorbate, softening agent, mix to obtain Starch rice base;
(3) preparation of PVA glue: by second half water boil of step (1) gained, boiling water is added in PVA, and continue heated and boiled be dissolved into clear solution to PVA in boiling water bath, obtain PVA glue;
(4) by PVA glue impouring step (2) gained Starch rice glue, after being mixed, a direction stirring adds linking agent, at 50-60 ℃ of constant temperature crosslinking reaction 1.5-2.5h, after reaction finishes to filter by 160 eye mesh screens, filtrate is incubated 50-60 ℃ again, vacuum defoamation 40-50 min in Debubbling tank, obtain Starch rice base/PVA glue, again to the 0.15-0.35 MPa that pressurizes in Debubbling tank, preheating tube by Starch rice base/PVA glue through 90-94 ℃, volume pump, spray lip, be uniformly coated on and be heated in advance on the 98-102 ℃ of casting machine steel band moving with the speed of 4-6m/min, glue film on steel band is dried by being warming up to the drying tunnel of 116-124 ℃, take off film, obtain Starch rice based, biodegradable packing film.
Further, on dry Starch rice based, biodegradable packing film surface, evenly apply again one deck polylactic acid membrane, poly(lactic acid) consumption is the 1-3% of the raw material of described Starch rice based, biodegradable packing film, makes further improved Starch rice based, biodegradable packing film.
The present invention's Starch rice base packing film, biocidal property is stronger, and water tolerance, resistance to acids and bases are good, and intensity is higher, can be resolved into carbonic acid gas and water by the microorganism in environment after discarded.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment 1
The Starch rice based, biodegradable packing film of the present embodiment, raw material by following weight percent is made: Starch rice 35%, α-amylase 0.03%, chitosan 10%, Sodium Benzoate 4%, potassium sorbate 2.95%, propionic anhydride 6%, polyvinyl alcohol (PVA) 20%, glutaraldehyde 0.02%, ethylene glycol 2%, distilled water 20%, raw material amounts to 1Kg.
The preparation method of the Starch rice based, biodegradable packing film of the present embodiment, comprises the following steps:
(1) preparation α-amylase liquid: prepared 200ml distilled water is divided into two parts, and every part of 100ml, adds 0.3g α-amylase in 100ml distilled water therein, stirs, and obtains α-amylase liquid; Another part standby;
(2) step (1) gained α-amylase liquid is added in beaker, be preheating to 52 ℃ and be placed in 52 ℃ of thermostat water baths, stir on one side, add Starch rice on one side; Then the beaker that mixture is housed is placed in to 52 ℃ of thermostat water baths, insulation enzymolysis 5 h, when Starch rice glue can stir, beaker is placed in boiling water bath, outer bath continues in heat-processed, Starch rice glue is further thinning, until the reactant core temperature in beaker is while reaching 95 ℃, stop water-bath, now Starch rice is made the water-sol by enzymolyzing alpha-amylase, then adds propionic anhydride, at 65 ℃ of esterification 45 min, then to mixing solutions, add chitosan, Sodium Benzoate, potassium sorbate and softening agent ethylene glycol, mix to obtain Starch rice base;
(3) preparation of PVA glue: by another part of 100ml water boil of step (1) gained, boiling water is added in PVA, and continue heated and boiled be dissolved into clear solution to PVA in boiling water bath, obtain PVA glue;
(4) by PVA glue impouring step (2) gained Starch rice glue, after being mixed, a direction stirring adds linking agent glutaraldehyde, at 55 ℃ of constant temperature crosslinking reaction 2h, after reaction finishes to filter by 160 eye mesh screens, filtrate is incubated 55 ℃ again, vacuum defoamation 45 min in Debubbling tank, obtain Starch rice base/PVA glue, again to 0.25 MPa that pressurizes in tank, preheating tube by Starch rice base/PVA glue through 92 ℃, volume pump, spray lip, be uniformly coated on be heated in advance that 100 ℃ of speed with 5m/min move casting machine steel band on, glue film on steel band is dried by being warming up to the drying tunnel of 118 ℃, take off film, at dry surface uniform, be coated with one deck polylactic acid membrane again, use the 2%(that poly(lactic acid) amount is preservative film raw material to apply again one deck polylactic acid membrane at dried Starch rice base/PVA glue film surface), make Starch rice based, biodegradable packing film.
Embodiment 2
The Starch rice based, biodegradable packing film of the present embodiment, raw material by following weight percent is made: 40% Starch rice, 0.06% α-amylase, 8% chitosan, 4.9% Sodium Benzoate, 4% potassium sorbate, 5% propionic anhydride, 17% PVA, 0.04% mda, 1% glycerine, 20% distilled water.The preparation method of the Starch rice based, biodegradable packing film of the present embodiment is identical with embodiment 1.
Embodiment 3
The Starch rice based, biodegradable packing film of the present embodiment, raw material by following weight percent is made: 30% Starch rice, 0.06% α-amylase, 8% chitosan, 5.9% Sodium Benzoate, 3% potassium sorbate, 5% propionic anhydride, 22% PVA, 0.04% oxalic dialdehyde, 1% polyoxyethylene glycol, 25% distilled water.The preparation method of the Starch rice based, biodegradable packing film of the present embodiment is identical with embodiment 1.
Embodiment 4 Starch rice based, biodegradable packing film performance evaluations
1, physical properties
The packing film that embodiment 1 makes, through physical property Instrument measuring, its tensile strength 25-30 MPa, elongation 100%, tensile strength and elongation are measured according to GB/T13022-91 " stretched plastic film method for testing performance ", the tensile strength obtaining according to test and the data of elongation at break, can calculate the Young's modulus of film, and result is 100 MPa; In actual physics nature examination, elongation at break represents the toughness of film, in pH<3 or pH>11 solution, soaks for a long time 15 h, still can keep stronger toughness, and elongation 100%.
2, bacteriostasis
The cultivation of 2.1 bacterial classification mother liquors
The present embodiment selects streptococcus aureus, intestinal bacteria and subtilis to make antibacterial experiment.Under gnotobasis, the picking one to be measured bacterium of ring after slant culture rejuvenation is in the common nutrient broth medium of 150mL through sterilizing in advance, and after 37 ℃ of shaking culture 24h, for inoculation, this is bacterial classification mother liquor.
2.2 bacteriostasis property analyses
33.3g nutrient agar is dissolved in to 1000 mL and steams in the water of shop, regulate pH to 7.2, boil 10min, cooled pH value is that 7.2 ± 0.2,115 ℃ of sterilizing 30min obtain ordinary nutrient agar substratum.
With reference to QB/T 2591-2003 < < antibiotic plastic-anti-microbial property test method and antibacterial effect > >, operate: get bacterial classification mother liquor, standby as initial bacterium immersion liquid to suitable concn (be about to OD value and be controlled at 0.5-1.5) with the normal saline dilution of sterilizing, Starch rice based, biodegradable packing film is cut into the thin slice of l * l cm, after ultra violet lamp sterilizing, be dipped in 15s in initial bacterium immersion liquid, take out, in (37 ± 1)
ounder C, relative humidity RH > 90% condition, cultivate 24h, take out the diaphragm of cultivating 24h again, use respectively 10 mL physiological saline, employing fully shakes up mode and repeatedly rinses diaphragm, get I mL washing lotion and be inoculated in mixed flat board in nutrient agar (NA), in (37 ± 1)
oc cultivates live bacterial count after 36 h, presses GB 4789.2 < < microbiological test of food hygiene-total number of bacterial colony method for measuring > > and measures viable counts.
The Starch rice based, biodegradable packing film of embodiment 3 preparation to the bacteriostasis rate of streptococcus aureus, intestinal bacteria and subtilis as following table:
3, biodegradable character is measured
The present embodiment is measured with reference to GB GB/T19277-2003 the biodegradability of Starch rice based, biodegradable packing film, and in present method determination test material, carbon changes into the conversion percentage of the carbonic acid gas discharging.The present embodiment is measured the Starch rice based, biodegradable packing film biodegradable rate of embodiment 1 preparation, and result shows this packing film biodegradable rate 91.7%(>80%).
Claims (10)
1. a Starch rice based, biodegradable packing film, it is characterized in that, by the raw material of following weight percent, made: Starch rice 15-55%, α-amylase 0.01-0.1%, chitosan 5-15%, Sodium Benzoate 2-10%, potassium sorbate 2-10%, propionic anhydride 2-10%, polyvinyl alcohol 10-55%, linking agent 0.01-0.05%, softening agent 0.8-10% and distilled water 15-30%.
2. Starch rice based, biodegradable packing film according to claim 1, it is characterized in that, by the raw material of following weight percent, made: Starch rice 20-35%, α-amylase 0.03-0.06%, chitosan 7-11%, Sodium Benzoate 4-6%, potassium sorbate 2.5-4.0%, propionic anhydride 5-6%, polyvinyl alcohol 12-27%, linking agent 0.02-0.04%, softening agent 1-2%, distilled water 20-25%.
3. Starch rice based, biodegradable packing film according to claim 2, is characterized in that, described Starch rice is 25-30%.
4. according to the Starch rice based, biodegradable packing film described in claim 2 or 3, it is characterized in that described chitosan 8-10%.
5. according to the Starch rice based, biodegradable packing film described in claim 2 or 3, it is characterized in that described polyvinyl alcohol 17-22%.
6. according to the Starch rice based, biodegradable packing film described in claim 1 or 2 or 3, it is characterized in that described α-amylase enzyme activity 40000-60000U/g.
7. according to the Starch rice based, biodegradable packing film described in claim 1 or 2 or 3, it is characterized in that, described linking agent be oxalic dialdehyde, mda or glutaraldehyde.
8. according to the Starch rice based, biodegradable packing film described in claim 1 or 2 or 3, it is characterized in that, described softening agent is glycerine, ethylene glycol or polyoxyethylene glycol.
9. a preparation method for the Starch rice based, biodegradable packing film as described in one of claim 1-8, is characterized in that, comprises the following steps:
(1) preparation α-amylase liquid: by prepared distilled water in two, add α-amylase in a distilled water therein, stir, obtain α-amylase liquid;
(2) step (1) gained α-amylase liquid is joined in reactor, be preheating to 48-56 ℃, Starch rice is added in reactor, stir on one side, add Starch rice on one side; Then reactor is placed in to the thermostat container of 48-56 ℃, insulation enzymolysis 4-6 h, when Starch rice glue can stir, reactor is placed in boiling water bath, outer bath continues in heat-processed, Starch rice glue is further thinning, until the reactant core temperature in reaction vessel is while reaching 93-98 ℃, stop water-bath, add again propionic anhydride, at 60-70 ℃ of esterification 40-50min, then in mixing solutions, add chitosan, Sodium Benzoate, potassium sorbate, softening agent, mix to obtain Starch rice base;
(3) preparation of PVA glue: second half distilled water of step (1) gained is boiled, boiling water is added in PVA, and continue heated and boiled be dissolved into clear solution to PVA in boiling water bath, obtain PVA glue;
(4) by PVA glue impouring step (2) gained Starch rice glue, after a direction stirring and evenly mixing, add linking agent, at 50-60 ℃ of constant temperature crosslinking reaction 1.5-2.5h, after reaction finishes to filter by 160 eye mesh screens, filtrate is incubated 50-60 ℃ again, vacuum defoamation 40-50 min in Debubbling tank, obtain Starch rice base/PVA glue, again to the 0.15-0.35 MPa that pressurizes in Debubbling tank, preheating tube by Starch rice base/PVA glue through 90-94 ℃, volume pump, spray lip, be uniformly coated on and be heated in advance on the 98-102 ℃ of casting machine steel band moving with the speed of 4-6m/min, glue film on steel band is dried by being warming up to the drying tunnel of 116-124 ℃, take off film, obtain Starch rice based, biodegradable packing film.
10. the preparation method of Starch rice based, biodegradable packing film as claimed in claim 9, it is characterized in that, in step (4), dry taking off after film, again at gained Starch rice based, biodegradable packing film surface uniform coating one deck polylactic acid membrane, the 1-3% that poly(lactic acid) consumption is described raw material weight.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104098794A (en) * | 2014-06-30 | 2014-10-15 | 安徽巢湖南方膜业有限责任公司 | Carboxymethyl-chitosan-starch-polyving-alcohol blending thin film |
| CN104945790A (en) * | 2015-07-29 | 2015-09-30 | 苏州荣昌复合材料有限公司 | Antimicrobial PVC-modified plastic |
| CN104987635A (en) * | 2015-05-19 | 2015-10-21 | 上海海洋大学 | Polyvinyl alcohol antibiosis packaging film and production method thereof |
| CN105802250A (en) * | 2016-04-19 | 2016-07-27 | 安徽亿诺新能源有限责任公司 | Low-self-discharging battery outer wrapping thin film and preparing method thereof |
| CN105838088A (en) * | 2016-04-19 | 2016-08-10 | 安徽亿诺新能源有限责任公司 | Film for wrapping exteriors of high capacity batteries and preparation process thereof |
| CN105838087A (en) * | 2016-04-19 | 2016-08-10 | 安徽亿诺新能源有限责任公司 | Film for wrapping exteriors of high-temperature batteries and preparation method thereof |
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| CN105860146A (en) * | 2016-04-29 | 2016-08-17 | 苏州市鼎立包装有限公司 | Preparation method of starch-base edible packaging film |
| CN105907008A (en) * | 2016-05-03 | 2016-08-31 | 四川农业大学 | Antibacterial plastic wrap and preparation method thereof |
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| CN109867819A (en) * | 2019-01-11 | 2019-06-11 | 安徽鼎正包装材料有限公司 | Polylactic acid-starch-PVA composite degradable packaging film and preparation method thereof |
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| CN104098794A (en) * | 2014-06-30 | 2014-10-15 | 安徽巢湖南方膜业有限责任公司 | Carboxymethyl-chitosan-starch-polyving-alcohol blending thin film |
| CN104987635A (en) * | 2015-05-19 | 2015-10-21 | 上海海洋大学 | Polyvinyl alcohol antibiosis packaging film and production method thereof |
| CN104945790A (en) * | 2015-07-29 | 2015-09-30 | 苏州荣昌复合材料有限公司 | Antimicrobial PVC-modified plastic |
| CN105907104A (en) * | 2016-04-19 | 2016-08-31 | 安徽亿诺新能源有限责任公司 | External coating thin film of power battery and preparation method thereof |
| CN105802250A (en) * | 2016-04-19 | 2016-07-27 | 安徽亿诺新能源有限责任公司 | Low-self-discharging battery outer wrapping thin film and preparing method thereof |
| CN105838088A (en) * | 2016-04-19 | 2016-08-10 | 安徽亿诺新能源有限责任公司 | Film for wrapping exteriors of high capacity batteries and preparation process thereof |
| CN105838087A (en) * | 2016-04-19 | 2016-08-10 | 安徽亿诺新能源有限责任公司 | Film for wrapping exteriors of high-temperature batteries and preparation method thereof |
| CN105860546A (en) * | 2016-04-19 | 2016-08-17 | 安徽亿诺新能源有限责任公司 | Ordinary battery external wrapping film and preparation method thereof |
| CN105860146A (en) * | 2016-04-29 | 2016-08-17 | 苏州市鼎立包装有限公司 | Preparation method of starch-base edible packaging film |
| CN105907008A (en) * | 2016-05-03 | 2016-08-31 | 四川农业大学 | Antibacterial plastic wrap and preparation method thereof |
| CN110302679A (en) * | 2018-03-20 | 2019-10-08 | 中国石油化工股份有限公司 | Wet film of a kind of intelligence control and its preparation method and application |
| CN108822458A (en) * | 2018-07-12 | 2018-11-16 | 齐鲁工业大学 | A kind of preparation method of the composite reactive packaging film for food preservation |
| CN108822458B (en) * | 2018-07-12 | 2020-11-17 | 齐鲁工业大学 | Preparation method of composite active packaging film for meat product preservation |
| CN109233162A (en) * | 2018-08-27 | 2019-01-18 | 盛世瑶兰（深圳）科技有限公司 | One kind being packed for environment-friendly type degradable composite membrane and preparation method thereof |
| CN109627500A (en) * | 2018-12-18 | 2019-04-16 | 王浚杰 | A kind of anti-oxidant antibacterial fully bio-degradable novel foodstuff packaging film based on organic acid |
| CN109867819A (en) * | 2019-01-11 | 2019-06-11 | 安徽鼎正包装材料有限公司 | Polylactic acid-starch-PVA composite degradable packaging film and preparation method thereof |
| CN112280109A (en) * | 2020-11-25 | 2021-01-29 | 辽阳市晨阳编织制品有限公司 | Biodegradable plastic and preparation method thereof |
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