CN104109264A - Modified starch-polyethylene composite plastic film and preparation method thereof - Google Patents
Modified starch-polyethylene composite plastic film and preparation method thereof Download PDFInfo
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- CN104109264A CN104109264A CN201410306326.7A CN201410306326A CN104109264A CN 104109264 A CN104109264 A CN 104109264A CN 201410306326 A CN201410306326 A CN 201410306326A CN 104109264 A CN104109264 A CN 104109264A
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Abstract
The invention discloses a modified starch-polyethylene composite plastic film and a preparation method thereof, and relates to the technical filed of plastic film production. The modified starch-polyethylene composite plastic film is prepared by using the following raw materials, by mass, 80-100 parts of starch, 45-55 parts of polyethylene, 4-5 parts of 30% hydrogen peroxide, 4.5-6 parts of sulfuric acid, 10-15 parts of glycerin, 5-10 parts of fish scale glue, 5-8 parts of polylactic acid, 3-8 parts of nanometer silica, 5-10 parts of paraffin, 1-4 parts of peroxide and 100-150 parts of water. The modified starch-polyethylene composite plastic film is prepared through the steps of mixing modified starch with other raw materials according to above proportions, fusing, extruding, carrying out blow molding, cooling, and reeling to form the film. The plastic film prepared in the invention has the advantages of high strength, low cost, biodegradability, and effective alleviation of the white pollution problem.
Description
Technical field:
The present invention relates to plastics film production technical field, be specifically related to a kind of treated starch-polyethylene composite plastic film and preparation method thereof.
Background technology:
Flourish along with plastics industry, the environmental pollution that waste plastic film rubbish brings is also on the rise, and white pollution becomes the environmental problem of attracting attention in the whole world.Therefore, people must go into overdrive to develop biological degredation plastic film, administer plastic refuse environment is brought to pollution problem.
Starch is a kind of abundant, cheap natural macromolecular material of originating, also be a kind of inexhaustible renewable resources, it can be biodegradable under multiple envrionment conditions, final degraded product carbonic acid gas and water can pass through the photosynthesis recirculation of plant, can not cause any pollution to environment.But on starch molecular chain, contain great amount of hydroxy group, and easily in molecular chain, form hydrogen bond outward with molecular chain, therefore indissoluble, infusibility, and poor water resistance, one meets water or long-term storage easy moisture that absorbs in damp atmosphere, affects its stability.
Summary of the invention:
Technical problem to be solved by this invention is to provide that a kind of technique is simple, production cost is low and environment amenable treated starch-polyethylene composite plastic film and preparation method thereof.
Technical problem to be solved by this invention adopts following technical scheme to realize:
A kind of treated starch-polyethylene composite plastic film, made by the raw material of following mass fraction:
Starch 80-100 part, polyethylene 45-55 part, 30% hydrogen peroxide 4-5 part, sulfuric acid 4.5-6 part, glycerine 10-15 part, fish phosphorus glue 5-10 part, poly(lactic acid) 5-8 part, nano silicon 3-8 part, paraffin 5-10 part, superoxide 1-4 part, water 100-150 part.
Described superoxide is one or more the mixture in the two 2,4 dichloro benzene formyls of benzoyl peroxide, dicumyl peroxide and peroxidation.
A preparation method for treated starch-polyethylene composite plastic film, comprises the steps:
Step a: modulation first adds water starch under mechanical stirring, being warming up to 50-60 DEG C, to add massfraction be 30% hydrogen peroxide and sulfuric acid again, adds inorganic base aqueous solution reaction soln pH is adjusted to neutrality after reaction 2-3h, forms treated starch slurry, suction filtration, washing, obtain treated starch subsequently.
Step b: add poly(lactic acid), nano silicon, paraffin and superoxide successively in glycerine and fish phosphorus glue under mechanical stirring, join in high-speed mixer together with the treated starch of then preparing with step a with polyethylene, fully mix.
Step c: the material mixing is joined in forcing machine, through rotation, extruding and the stirring of screw rod, material is fusion plastification under certain temperature effect, and under screw rod promotes, after filter screen, spreader plate, be extruded into thin-walled tube by head annular mouth die clearance, then under flow state while hot with pressurized air by its inflation, cooling and shaping, folder are flat, compress and draw into winding roller by deflector roll, obtain film article.
Described mineral alkali is the one in sodium hydroxide, sodium carbonate and sodium bicarbonate.
The invention has the beneficial effects as follows: starch source of the present invention is abundant, cheap, environmentally friendly; And the plastics film intensity making is high, production cost is low, biodegradable, can effectively alleviate white pollution problems.
Embodiment:
For technique means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below further set forth the present invention.
1) proportioning raw materials of embodiment 1-3 is as follows:
| Raw material | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Starch | 80 parts | 90 parts | 100 parts |
| Polyethylene | 45 parts | 50 parts | 55 parts |
| 30% hydrogen peroxide | 4 parts | 4.5 part | 5 parts |
| Sulfuric acid | 4.5 part | 5 parts | 6 parts |
| Glycerine | 10 parts | 12 parts | 15 parts |
| Fish phosphorus glue | 5 parts | 7 parts | 10 parts |
| Poly(lactic acid) | 5 parts | 6 parts | 8 parts |
| Nano silicon | 3 parts | 5 parts | 8 parts |
| Paraffin | 5 parts | 7 parts | 10 parts |
| Superoxide | 1 part | 2 parts | 4 parts |
| Water | 100 parts | 130 parts | 150 parts |
Wherein, superoxide is one or more the mixture in the two 2,4 dichloro benzene formyls of benzoyl peroxide, dicumyl peroxide and peroxidation.
2) embodiment 1-3 carries out the preparation of film in accordance with the following steps:
Step a: modulation first adds water starch under mechanical stirring, being warming up to 50-60 DEG C, to add massfraction be 30% hydrogen peroxide and sulfuric acid again, adds inorganic base aqueous solution reaction soln pH is adjusted to neutrality after reaction 2-3h, forms treated starch slurry, suction filtration, washing, obtain treated starch subsequently.
Step b: add poly(lactic acid), nano silicon, paraffin and superoxide successively in glycerine and fish phosphorus glue under mechanical stirring, join in high-speed mixer together with the treated starch of then preparing with step a with polyethylene, fully mix.
Step c: the material mixing is joined in forcing machine, through rotation, extruding and the stirring of screw rod, material is fusion plastification under certain temperature effect, and under screw rod promotes, after filter screen, spreader plate, be extruded into thin-walled tube by head annular mouth die clearance, then under flow state while hot with pressurized air by its inflation, cooling and shaping, folder are flat, compress and draw into winding roller by deflector roll, obtain film article.
Wherein, the mineral alkali in step a is the one in sodium hydroxide, sodium carbonate and sodium bicarbonate.
3) treated starch-polyethylene composite plastic film of being prepared by embodiment 1-3 carries out the test of mechanical property, water resistance and degradation property, and testing method and result are as follows:
Measure tensile strength and the elongation at break of film according to GB/T13022-1991, measure the water-intake rate of film according to GB/T1034-2008.
Soil buries degradation experiment: get a moisture eliminator, lay wherein the earth that 10cm is thick, regulating water-activity is 15%, film is cut into 5cm × 2cm size, at 90 DEG C, dries to constant weight, then interval is buried in the earth uniformly, take out film every 5d, use distilled water flushing surface, then at 90 DEG C, dry to constant weight, calculate its rate of weight loss.
| Test event | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Tensile strength (MPa) | 40.12 | 35.17 | 38.34 |
| Elongation at break (%) | 123.45 | 150.31 | 141.92 |
| Water regain (%) | 19％ | 21％ | 25％ |
| Degradation time (moon) | 4.8 | 4.7 | 4.5 |
As can be seen from the above table, the thin film mechanical performance that the present invention makes is better, and water regain is suitable, and can be completely degraded at room temperature 5 months, is far superior to degradation time 9-15 month of common degradable film, thereby has reduced the pollution to environment.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification sheets, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (4)
1. treated starch-polyethylene composite plastic film, is characterized in that, is made up of the raw material of following mass fraction:
Starch 80-100 part, polyethylene 45-55 part, 30% hydrogen peroxide 4-5 part, sulfuric acid 4.5-6 part, glycerine 10-15 part, fish phosphorus glue 5-10 part, poly(lactic acid) 5-8 part, nano silicon 3-8 part, paraffin 5-10 part, superoxide 1-4 part, water 100-150 part.
2. treated starch-polyethylene composite plastic film according to claim 1, is characterized in that: described superoxide is one or more the mixture in the two 2,4 dichloro benzene formyls of benzoyl peroxide, dicumyl peroxide and peroxidation.
3. a preparation method for treated starch-polyethylene composite plastic film, is characterized in that, comprises the steps:
Step a: modulation first adds water starch under mechanical stirring, being warming up to 50-60 DEG C, to add massfraction be 30% hydrogen peroxide and sulfuric acid again, adds inorganic base aqueous solution reaction soln pH is adjusted to neutrality after reaction 2-3h, forms treated starch slurry, suction filtration, washing, obtain treated starch subsequently.
Step b: add poly(lactic acid), nano silicon, paraffin and superoxide successively in glycerine and fish phosphorus glue under mechanical stirring, join in high-speed mixer together with the treated starch of then preparing with step a with polyethylene, fully mix.
Step c: the material mixing is joined in forcing machine, through rotation, extruding and the stirring of screw rod, material is fusion plastification under certain temperature effect, and under screw rod promotes, after filter screen, spreader plate, be extruded into thin-walled tube by head annular mouth die clearance, then under flow state while hot with pressurized air by its inflation, cooling and shaping, folder are flat, compress and draw into winding roller by deflector roll, obtain film article.
4. the preparation method of treated starch-polyethylene composite plastic film according to claim 3, is characterized in that: described mineral alkali is the one in sodium hydroxide, sodium carbonate and sodium bicarbonate.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105153474A (en) * | 2015-09-30 | 2015-12-16 | 北京化工大学 | Stretchable organic-residue-based degradable mulching film and preparation method thereof |
| CN106380635A (en) * | 2016-08-30 | 2017-02-08 | 安徽鼎正包装材料有限公司 | Processing technology of packaging film |
| CN106496965A (en) * | 2016-10-26 | 2017-03-15 | 安徽飞达电气科技有限公司 | A kind of capacitor film high life polyester material |
| CN112011096A (en) * | 2020-09-02 | 2020-12-01 | 山东农业大学 | Acidolysis starch composite membrane and preparation method thereof |
| CN115538216A (en) * | 2022-10-28 | 2022-12-30 | 武汉市博源纸塑彩印制品有限公司 | Degradable PLA double-film-coated synthetic material and process thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353400A (en) * | 2008-09-11 | 2009-01-28 | 四川大学 | Preparation of biodegradable thermoplastic starch plastic having high starch content |
-
2014
- 2014-06-30 CN CN201410306326.7A patent/CN104109264B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353400A (en) * | 2008-09-11 | 2009-01-28 | 四川大学 | Preparation of biodegradable thermoplastic starch plastic having high starch content |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105153474A (en) * | 2015-09-30 | 2015-12-16 | 北京化工大学 | Stretchable organic-residue-based degradable mulching film and preparation method thereof |
| CN106380635A (en) * | 2016-08-30 | 2017-02-08 | 安徽鼎正包装材料有限公司 | Processing technology of packaging film |
| CN106496965A (en) * | 2016-10-26 | 2017-03-15 | 安徽飞达电气科技有限公司 | A kind of capacitor film high life polyester material |
| CN112011096A (en) * | 2020-09-02 | 2020-12-01 | 山东农业大学 | Acidolysis starch composite membrane and preparation method thereof |
| CN115538216A (en) * | 2022-10-28 | 2022-12-30 | 武汉市博源纸塑彩印制品有限公司 | Degradable PLA double-film-coated synthetic material and process thereof |
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| Publication number | Publication date |
|---|---|
| CN104109264B (en) | 2016-04-27 |
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Denomination of invention: A modified starch polyethylene composite plastic film and its preparation method Effective date of registration: 20210430 Granted publication date: 20160427 Pledgee: Anhui Hexian Rural Commercial Bank Co.,Ltd. Chujiang sub branch Pledgor: ANHUI CHAOHU SOUTH MEMBRANE INDUSTRY Co.,Ltd. Registration number: Y2021980003257 |
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