CN104109264B - A kind of treated starch-polyethylene composite plastic film and preparation method thereof - Google Patents
A kind of treated starch-polyethylene composite plastic film and preparation method thereof Download PDFInfo
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- CN104109264B CN104109264B CN201410306326.7A CN201410306326A CN104109264B CN 104109264 B CN104109264 B CN 104109264B CN 201410306326 A CN201410306326 A CN 201410306326A CN 104109264 B CN104109264 B CN 104109264B
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Abstract
The invention discloses a kind of treated starch-polyethylene composite plastic film and preparation method thereof, relate to plastics film production technical field, be 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, after modified starch mixes in described ratio with other raw materials, through melting, extrude, blowing, cool, batch film forming.The plastics film intensity that the present invention obtains is high, cost is low and biodegradable, effectively can alleviate white pollution problems.
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 also is on the rise, and white pollution becomes the environmental problem attracted attention in the whole world.Therefore, people must go into overdrive to develop biological degredation plastic film, administer plastic refuse and bring pollution problem to environment.
Starch is a kind of abundance, cheap natural macromolecular material, also be a kind of inexhaustible renewable resources, it can be biodegradable in a variety of environmental conditions, final degraded product carbonic acid gas and water by the photosynthesis recirculation of plant, can not cause any pollution to environment.But containing great amount of hydroxy group on starch molecular chain, easily in molecular chain, forming hydrogen bond outward, therefore indissoluble, infusibility, and poor water resistance with molecular chain, a chance water or long-term storage easily absorb moisture in damp atmosphere, affect 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, be 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.
Described superoxide is the mixture of one or more in the two 2,4 dichloro benzene formyl of benzoyl peroxide, dicumyl peroxide and peroxidation.
A preparation method for treated starch-polyethylene composite plastic film, comprises the steps:
Step a: first add water starch under mechanical stirring modulation, be warming up to 50-60 DEG C again and add hydrogen peroxide and the sulfuric acid that massfraction is 30%, add inorganic base aqueous solution after reaction 2-3h and reaction soln pH is adjusted to neutrality, form 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, joins in high-speed mixer together with the treated starch then prepared with polyethylene and step a, fully mixes.
Step c: the material mixed is joined in forcing machine, through the rotation of screw rod, extruding and stirring, 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, being compressed by deflector roll draws into winding roller, obtains 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 obtained plastics film intensity is high, production cost is low, biodegradable, effectively can alleviate white pollution problems.
Embodiment:
The technique means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, setting forth the present invention further below.
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 the mixture of one or more in the two 2,4 dichloro benzene formyl 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: first add water starch under mechanical stirring modulation, be warming up to 50-60 DEG C again and add hydrogen peroxide and the sulfuric acid that massfraction is 30%, add inorganic base aqueous solution after reaction 2-3h and reaction soln pH is adjusted to neutrality, form 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, joins in high-speed mixer together with the treated starch then prepared with polyethylene and step a, fully mixes.
Step c: the material mixed is joined in forcing machine, through the rotation of screw rod, extruding and stirring, 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, being compressed by deflector roll draws into winding roller, obtains 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 prepared embodiment 1-3 carries out the test of mechanical property, water resistance and degradation property, testing method and result 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 the thick earth of 10cm wherein, water-activity is regulated to be 15%, film is cut into 5cm × 2cm size, dry at 90 DEG C to constant weight, then interval is buried in the earth uniformly, film is taken out every 5d, with distilled water flushing surface, then dry to constant weight at 90 DEG C, 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 obtains 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, thus reduces the pollution to environment.
More than show and describe 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; what describe in above-described embodiment and specification sheets 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.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (3)
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 glue from scale 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 the one in the two 2,4 dichloro benzene formyl of benzoyl peroxide, dicumyl peroxide and peroxidation.
2. a preparation method for treated starch-polyethylene composite plastic film, is characterized in that, comprise the steps:
Step a: first add water starch under mechanical stirring modulation, be warming up to 50-60 DEG C again and add hydrogen peroxide and the sulfuric acid that massfraction is 30%, add inorganic base aqueous solution after reaction 2-3h and reaction soln pH is adjusted to neutrality, form 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 glue from scale under mechanical stirring, joins in high-speed mixer together with the treated starch then prepared with polyethylene and step a, fully mixes;
Step c: the material mixed is joined in forcing machine, through the rotation of screw rod, extruding and stirring, 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, being compressed by deflector roll draws into winding roller, obtains film article.
3. the preparation method of treated starch according to claim 2-polyethylene composite plastic film, is characterized in that: described mineral alkali is the one in sodium hydroxide, sodium carbonate and sodium bicarbonate.
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| CN201410306326.7A CN104109264B (en) | 2014-06-30 | 2014-06-30 | A kind of treated starch-polyethylene composite plastic film and preparation method thereof |
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| CN201410306326.7A CN104109264B (en) | 2014-06-30 | 2014-06-30 | A kind of treated starch-polyethylene composite plastic film and preparation method thereof |
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| CN104109264B true CN104109264B (en) | 2016-04-27 |
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| CN105153474B (en) * | 2015-09-30 | 2017-10-24 | 北京化工大学 | A kind of stretchable type organic waste residues base degradable mulch 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 |
| CN112011096B (en) * | 2020-09-02 | 2022-03-18 | 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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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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