CN105175848A - Low-density polyethylene degradable film modified by nano polygorskite loaded crosslinked starch and preparation method for low-density polyethylene degradable film - Google Patents
Low-density polyethylene degradable film modified by nano polygorskite loaded crosslinked starch and preparation method for low-density polyethylene degradable film Download PDFInfo
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- CN105175848A CN105175848A CN201510442355.0A CN201510442355A CN105175848A CN 105175848 A CN105175848 A CN 105175848A CN 201510442355 A CN201510442355 A CN 201510442355A CN 105175848 A CN105175848 A CN 105175848A
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- density polyethylene
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- degradable film
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention relates to the technical field of degradable film materials, and in particular relates to a low-density polyethylene degradable film modified by nano polygorskite loaded crosslinked starch and a preparation method for the low-density polyethylene degradable film. Film master batch of the low-density polyethylene degradable film adopts the nano palygorskite with good adsorption to adsorb fixed crosslinked starch. After being treated by a silane coupling agent, the mixed powder has better compatibility with the low-density polyethylene, thereby improving defects of a long degradation cycle and inadequate degradation of a conventional starch-polyethylene degradable film, increasing the dose of cross-linked starch and reducing the production cost. The nano palygorskite further effectively improves a blow-molding and film-forming property of the low-density polyethylene, improves mechanical properties of the film, has a porous structure for absorbing water and ventilating, is more beneficial for the propagation of soil microorganisms, and accelerates degradation. Compared with conventional polyethylene degradable materials, the film material prepared by the method disclosed by invention has a higher degradation speed, can improve the soil environment, is free of hazardous substances, is safe in component, and is economical and environmentally friendly.
Description
Technical field
The present invention relates to degradative membrane field of material technology, be specifically related to a kind of Low Density Polyethylene degradative plastic film by the loaded cross-linked starch conversion of nanometer palygorskite and preparation method thereof.
Background technology
Mulch film, as its name suggests, be membrane covering film, in order to improve the soil moisture, keep soil moisture, maintain Soil structure, prevent the disease that pest attacks crop and certain micro-organisms cause, Promoting plant growths etc., current film-mulching technique obtains extensive popularization in agricultural, and effect of increasing production is obvious.Because now a large amount of mulch film used is nondegradable macromolecular compound, neither by microbial attack, can not disintegrate, insoluble pollution hazard will inevitably be brought to descendant if things go on like this.Therefore, study degradable mulch to come into one's own gradually.
Starch is the abundant renewable resources of nature, and it is nontoxic, fully biodegradable, but poor mechanical property and water resistance but limit it applies.Starch is carried out modification by some researchs at present, by itself and synthetic resins or degradable macromolecular material is blended makes degradation material, but these materials are subject to the restriction of its mechanical property, degradation cycle and environment for use and processing technology, the use properties of product is barely satisfactory.
Summary of the invention
The object of the invention is to, prepare a kind of Low Density Polyethylene degradative plastic film by the loaded cross-linked starch conversion of nanometer palygorskite, the economic environment-friendly degradable mulch film that a kind of film forming properties is good, biological degradation is abundant to obtain, raw material availability is high, to achieve these goals, the technical solution used in the present invention is as follows:
A kind of Low Density Polyethylene degradative plastic film by the loaded cross-linked starch conversion of nanometer palygorskite, it is characterized in that, this mulch film is made up of the raw material of following weight part: solid content is silicon sol 10-12, the Low Density Polyethylene 40-50 of 20-25%, cross-linking starch 6-8, nanometer palygorskite 8-10, ethylene-acrylic acid copolymer 4-5, carboxymethyl chitosan 1-1.5, alkyl glycoside 0.1-0.2, silane coupling agent 0.1-0.2, water 20-30.
Described a kind of preparation method by the Low Density Polyethylene degradative plastic film of the loaded cross-linked starch conversion of nanometer palygorskite, it is characterized in that, described preparation method is:
(1) first alkyl glycoside, cm-chitosan are dropped into and be heated in the water of 50-60 DEG C, be stirred to it to dissolve completely, drop into cross-linking starch, silicon sol subsequently, and solution is heated to 60-80 DEG C, after stirring gelatinization 20-30min, nanometer palygorskite is dropped in mixed solution, by gained slurry grinding distribution 40-50min after preliminary mixing, finally by gained material warm air drying, remove moisture completely, obtain the loaded cross-linked composites of starch of nanometer palygorskite for subsequent use;
(2) the loaded cross-linked composites of starch of step (1) gained nanometer palygorskite and silane coupling agent are uniformly mixed; add other leftover materials again; fully mix granulation in rear input singe screw tablets press, gained particle drops in inflation film manufacturing machine and blows film forming, to obtain final product.
Degradative plastic film prepared by the present invention take low-density polyethylene material as major ingredient, add cross-linking starch to improve its degradation property, in order to improve the consistency of cross-linking starch and Low Density Polyethylene, utilize the fixing cross-linking starch of nanometer palygorskite absorption with favourable absorption, mixed powder is excellent with polyethylene consistency after silane coupling agent process, improve traditional starch-polyethylene degradation film degradation cycle long, to degrade insufficient shortcoming, and improve the consumption of cross-linking starch, reduce production cost, and nanometer palygorskite also effectively raises the Blown Film of Low Density Polyethylene, improve the mechanical property of film, and have microvoid structure, absorbent ventilate, be more conducive to the breeding of soil microorganisms, accelerate degraded.The film material prepared of this invention comparatively conventional polyethylene degradable material degradation speed is faster, and can improve edatope, not containing hazardous and noxious substances, and composition safety, economic environmental protection.
Embodiment
Embodiment
The mulch film of the present embodiment is made up of the raw material of following weight part: solid content is silicon sol 10, Low Density Polyethylene 45, cross-linking starch 7, nanometer palygorskite 9, ethylene-acrylic acid copolymer 4, carboxymethyl chitosan 1.2, alkyl glycoside 0.1, silane coupling agent 0.1, the water 25 of 25%.
The preparation method of this degradative plastic film is:
(1) first alkyl glycoside, cm-chitosan are dropped into and be heated in the water of 50-60 DEG C, be stirred to it to dissolve completely, drop into cross-linking starch, silicon sol subsequently, and solution is heated to 60-80 DEG C, after stirring gelatinization 25min, nanometer palygorskite is dropped in mixed solution, by gained slurry grinding distribution 45min after preliminary mixing, finally by gained material warm air drying, remove moisture completely, obtain the loaded cross-linked composites of starch of nanometer palygorskite for subsequent use;
(2) the loaded cross-linked composites of starch of step (1) gained nanometer palygorskite and silane coupling agent are uniformly mixed; add other leftover materials again; fully mix granulation in rear input singe screw tablets press, gained particle drops in inflation film manufacturing machine and blows film forming, to obtain final product.
The sample that thickness is 0.01mm made by mulch film obtained by the present embodiment, follows the result that relevant criterion carries out performance test to be:
| Test item | Detected result |
| Tensile strength (longitudinal direction) | 19.4 |
| Tensile strength (transverse direction) | 17.2 |
| Transmittance | 80.4% |
| 30d landfill rate of weight loss | 20.2% |
| 120d landfill rate of weight loss | 48.4% |
Claims (2)
1. the Low Density Polyethylene degradative plastic film by the loaded cross-linked starch conversion of nanometer palygorskite, it is characterized in that, this mulch film is made up of the raw material of following weight part: solid content is silicon sol 10-12, the Low Density Polyethylene 40-50 of 20-25%, cross-linking starch 6-8, nanometer palygorskite 8-10, ethylene-acrylic acid copolymer 4-5, carboxymethyl chitosan 1-1.5, alkyl glycoside 0.1-0.2, silane coupling agent 0.1-0.2, water 20-30.
2. a kind of preparation method by the Low Density Polyethylene degradative plastic film of the loaded cross-linked starch conversion of nanometer palygorskite as claimed in claim 1, it is characterized in that, described preparation method is:
(1) first alkyl glycoside, cm-chitosan are dropped into and be heated in the water of 50-60 DEG C, be stirred to it to dissolve completely, drop into cross-linking starch, silicon sol subsequently, and solution is heated to 60-80 DEG C, after stirring gelatinization 20-30min, nanometer palygorskite is dropped in mixed solution, by gained slurry grinding distribution 40-50min after preliminary mixing, finally by gained material warm air drying, remove moisture completely, obtain the loaded cross-linked composites of starch of nanometer palygorskite for subsequent use;
(2) the loaded cross-linked composites of starch of step (1) gained nanometer palygorskite and silane coupling agent are uniformly mixed; add other leftover materials again; fully mix granulation in rear input singe screw tablets press, gained particle drops in inflation film manufacturing machine and blows film forming, to obtain final product.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510442355.0A CN105175848A (en) | 2015-07-23 | 2015-07-23 | Low-density polyethylene degradable film modified by nano polygorskite loaded crosslinked starch and preparation method for low-density polyethylene degradable film |
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| CN201510442355.0A CN105175848A (en) | 2015-07-23 | 2015-07-23 | Low-density polyethylene degradable film modified by nano polygorskite loaded crosslinked starch and preparation method for low-density polyethylene degradable film |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115926478A (en) * | 2023-01-04 | 2023-04-07 | 陈时辉 | Composite degradable plastic and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047678A (en) * | 1990-06-29 | 1990-12-12 | 青岛化工学院 | Produce the method for controllable light, microorganism co-degradation vinyon mulch film |
| CN1611531A (en) * | 2003-10-29 | 2005-05-04 | 阿图什市天人商贸有限责任公司 | Starch-based biodegradable film material and its production method |
| CN102417648A (en) * | 2011-11-23 | 2012-04-18 | 吴江明峰聚氨酯制品有限公司 | Biodegradable polyethylene plastic film |
-
2015
- 2015-07-23 CN CN201510442355.0A patent/CN105175848A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047678A (en) * | 1990-06-29 | 1990-12-12 | 青岛化工学院 | Produce the method for controllable light, microorganism co-degradation vinyon mulch film |
| CN1611531A (en) * | 2003-10-29 | 2005-05-04 | 阿图什市天人商贸有限责任公司 | Starch-based biodegradable film material and its production method |
| CN102417648A (en) * | 2011-11-23 | 2012-04-18 | 吴江明峰聚氨酯制品有限公司 | Biodegradable polyethylene plastic film |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115926478A (en) * | 2023-01-04 | 2023-04-07 | 陈时辉 | Composite degradable plastic and preparation method thereof |
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Application publication date: 20151223 |