CN104479175A - Starch-based biodegradable thin film and preparation method thereof - Google Patents
Starch-based biodegradable thin film and preparation method thereof Download PDFInfo
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- CN104479175A CN104479175A CN201410777466.2A CN201410777466A CN104479175A CN 104479175 A CN104479175 A CN 104479175A CN 201410777466 A CN201410777466 A CN 201410777466A CN 104479175 A CN104479175 A CN 104479175A
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Abstract
The invention relates to a starch-based biodegradable thin film and a preparation method thereof. The starch-based biodegradable thin film comprises the following components in parts by weight: 100 parts of starch, 15-20 parts of seaweed polyphenol, 15-20 parts of glycerol and 5-10 parts of palygorskite clay. The starch-based biodegradable thin film as claimed in the claim 1 is characterized by comprising the following components in parts by weight: 100 parts of starch, 18 parts of seaweed polyphenol, 18 parts of glycerol and 8 parts of palygorskite clay. The starch-based biodegradable thin film has the beneficial effects that since seaweed polyphenol has good compatibility with starch, by adding a relatively small amount of seaweed polyphenol into the starch-based thin film, under the case of reducing the usage amount of glycerol, the strength of the plastic thin film can be increased; by adding palygorskite clay into the thin film, the water retention property of a composite material is increased and the cost is reduced.
Description
Technical field
The present invention relates to a kind of starch-based degradable film and preparation method thereof, belong to macromolecular material and manufacture field thereof.
Technical background
Petroleum-based plastics, since appearance, with its abundant source, appearance attractive in appearance, health, easy to process, stable in properties and be widely used in a lot of occasion, has become human survival, the indispensable basic material of social development and articles for use.But from Analysis of Environmental Problem, a large amount of discarded plastics, because of its non-biodegradable, bring the puzzlement of white pollution to the living environment of the mankind.Because general-purpose plastics generally wants the centuries just can degrade, long-term hazards is caused to soil, affects crop growth, cause crop production reduction; It is lethal that the plastics be scattered can cause animal to eat by mistake.And degradable native biopolymer is inexhaustible renewable resources, various in style, production cost is low, can not produce pollute environment.But the mechanical property of degradable plastics is poor in prior art, need to improve further.
Summary of the invention
The object of this invention is to provide a kind of starch-based degradable film and preparation method thereof, for realizing above object, a kind of starch-based degradable film of the present invention, its component and weight part are:
Starch 100 parts,
Sea grass polyphenol 15-20 part,
Glycerine 15-20 part,
Palygorskite clay 5-10 part.
The preparation method of a kind of starch-based degradable film of the present invention is:
(1) be dissolved in acetic acid by sea grass polyphenol, preparation mass concentration is the sea grass polyphenol solution of 2%;
(2) add starch, palygorskite clay, glycerine, water, be placed in ultrasonic wave separating apparatus and disperse 30min;
(3) at 50 DEG C, gelatinization is carried out, and carry out mechanical stirring, then be poured in mould, dry 20h at 60 DEG C, take off film, be balanced 24-48h in the environment of 70% again in relative humidity, carry out sulfuration, film-making with thermocompressor and chilling press, finally with the injection moulding on injection moulding machine of conventional Shooting Technique.
Further, the power of described ultrasonic wave separating apparatus is 600W.
Further, described gelatinization time is 20-30min.
The beneficial effect that the present invention produces is
Sea grass polyphenol and starch have good intermiscibility, and namely the sea grass polyphenol adding small amount in starch film when reducing glycerine consumption, can improve the intensity of plastics film.To add polygorskite be in the film water retention property in order to improve matrix material and reduce costs.
Embodiment
Below by specific embodiment, the invention will be further described, and following examples are descriptive, is not determinate, can not limit protection scope of the present invention with this.
If no special instructions, the reagent used in the present invention is conventional reagent; If no special instructions, the method used is ordinary method.
Embodiment 1:
A kind of starch-based degradable film, its component and weight part are:
Starch 100kg,
Sea grass polyphenol 15kg,
Glycerine 15kg,
Palygorskite clay 5kg.
A kind of preparation method of starch-based degradable film is:
(1) be dissolved in acetic acid by sea grass polyphenol, preparation mass concentration is the sea grass polyphenol solution of 2%;
(2) add starch, palygorskite clay, glycerine, water, being placed in power is that the ultrasonic wave separating apparatus of 600W disperses 30min;
(3) at 50 DEG C, gelatinization 25min is carried out, and carry out mechanical stirring, then be poured in mould, dry 20h at 60 DEG C, take off film, be balanced 36h in the environment of 70% again in relative humidity, carry out sulfuration, film-making with thermocompressor and chilling press, finally with the injection moulding on injection moulding machine of conventional Shooting Technique.
Sea grass polyphenol-starch-based degradable the laminated film prepared as stated above is measured its mechanical property and is: record tensile strength 17.9MPa, elongation at break 182%.
Embodiment 2:
A kind of starch-based degradable film, its component and weight part are:
Starch 100kg,
Sea grass polyphenol 18kg,
Glycerine 18kg,
Palygorskite clay 6kg.
A kind of preparation method of starch-based degradable film is:
(1) be dissolved in acetic acid by sea grass polyphenol, preparation mass concentration is the sea grass polyphenol solution of 2%;
(2) add starch, palygorskite clay, glycerine, water, being placed in power is that the ultrasonic wave separating apparatus of 600W disperses 30min;
(3) at 50 DEG C, gelatinization 20min is carried out, and carry out mechanical stirring, then be poured in mould, dry 20h at 60 DEG C, take off film, be balanced 36h in the environment of 70% again in relative humidity, carry out sulfuration, film-making with thermocompressor and chilling press, finally with the injection moulding on injection moulding machine of conventional Shooting Technique.
Sea grass polyphenol-starch-based degradable the laminated film prepared as stated above is measured its mechanical property and is: record tensile strength 18.4MPa, elongation at break 195%.
Embodiment 3:
A kind of starch-based degradable film, its component and weight part are:
Starch 100kg,
Sea grass polyphenol 20kg,
Glycerine 20kg,
Palygorskite clay 10kg.
A kind of preparation method of starch-based degradable film is:
(1) be dissolved in acetic acid by sea grass polyphenol, preparation mass concentration is the sea grass polyphenol solution of 2%;
(2) add starch, palygorskite clay, glycerine, water, being placed in power is that the ultrasonic wave separating apparatus of 600W disperses 30min;
(3) at 50 DEG C, gelatinization 30min is carried out, and carry out mechanical stirring, then be poured in mould, dry 20h at 60 DEG C, take off film, be balanced 48h in the environment of 70% again in relative humidity, carry out sulfuration, film-making with thermocompressor and chilling press, finally with the injection moulding on injection moulding machine of conventional Shooting Technique.
Sea grass polyphenol-starch-based degradable the laminated film prepared as stated above is measured its mechanical property and is: record tensile strength 17.6MPa, elongation at break 187%.
Claims (4)
1. a starch-based degradable film, is characterized in that: its component and weight part are:
Starch 100 parts,
Sea grass polyphenol 15-20 part,
Glycerine 15-20 part,
Palygorskite clay 5-10 part.
2. a preparation method for starch-based degradable film, is characterized in that, comprises the steps:
(1) be dissolved in acetic acid by sea grass polyphenol, preparation mass concentration is the sea grass polyphenol solution of 2%;
(2) add starch, palygorskite clay, glycerine, water, be placed in ultrasonic wave separating apparatus and disperse 30min;
(3) at 50 DEG C, gelatinization is carried out, and carry out mechanical stirring, then be poured in mould, dry 20h at 60 DEG C, take off film, be balanced 24-48h in the environment of 70% again in relative humidity, carry out sulfuration, film-making with thermocompressor and chilling press, finally with the injection moulding on injection moulding machine of conventional Shooting Technique.
3. the preparation method of a kind of starch-based degradable film according to claim 2, is characterized in that: the power of described ultrasonic wave separating apparatus is 600W.
4. the preparation method of a kind of starch-based degradable film according to claim 2, is characterized in that: described gelatinization time is 20-30min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410777466.2A CN104479175A (en) | 2014-12-16 | 2014-12-16 | Starch-based biodegradable thin film and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410777466.2A CN104479175A (en) | 2014-12-16 | 2014-12-16 | Starch-based biodegradable thin film and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104479175A true CN104479175A (en) | 2015-04-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201410777466.2A Pending CN104479175A (en) | 2014-12-16 | 2014-12-16 | Starch-based biodegradable thin film and preparation method thereof |
Country Status (1)
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| CN (1) | CN104479175A (en) |
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2014
- 2014-12-16 CN CN201410777466.2A patent/CN104479175A/en active Pending
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Application publication date: 20150401 |