CN111635622A - Weather-resistant full-biodegradable mulching film and preparation method thereof - Google Patents
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- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G13/00—Protecting plants
- A01G13/02—Protective coverings for plants; Coverings for the ground; Devices for laying-out or removing coverings
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- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
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- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
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Abstract
The invention discloses a weather-resistant full-biodegradable mulching film and a preparation method thereof, and relates to the technical field of mulching films, wherein the weather-resistant full-biodegradable mulching film is prepared from the following raw materials in parts by weight: 40-75 parts of PBAT, 8-15 parts of PBS, 5-8 parts of PVA, 2-5 parts of ternary organic alcohol, 0.1-0.5 part of plasticizer, 15-30 parts of inorganic filler, 3-6 parts of compatilizer, 0.1-3 parts of antioxidant and 0.5-5 parts of auxiliary agent; in the invention, PBS, PVE and PBAT are mixed together to be used as carriers, and the PBS and the PBAT are emulsified by the PVA, so that the compatibility among the carriers is improved, the carriers have excellent film-forming property and mechanical property corresponding to the PBAT and the heat resistance of the PBS, and further the mechanical property and weather resistance of the prepared mulching film are improved; in addition, through the addition of the ternary organic alcohol, the plasticizer and the inorganic filler, the adhesion performance among different carriers can be increased, and the toughness and the mechanical performance of the prepared mulching film are improved; and through the addition of the compatilizer, the antioxidant and the auxiliary agent, the full mixing of the raw materials can be better promoted, and the weather resistance of the prepared mulching film can be improved.
Description
Technology neighborhood
The invention relates to the technical field of mulching films, in particular to a weather-resistant full-biodegradable mulching film and a preparation method thereof.
Background
Mulching films, i.e., ground covering films, are generally transparent or black PE films, and also have green and silver films, and are used for ground covering to increase the temperature of soil, maintain the moisture of soil, maintain the structure of soil, prevent pests from attacking crops and diseases caused by certain microorganisms, etc., and promote the growth of plants.
Besides the income brought to the farmland by the application of the mulching film, the farmland is also greatly polluted at the same time, and the existing mulching film is slow in biodegradation, so that the retained mulching film in the soil can cause soil hardening, and the yield of crops is reduced.
At present, PBAT receives more and more attention as a biodegradable material, but when PBAT is used for a mulching film, the prepared mulching film has poor weather resistance, mechanical property and oxidation resistance, so that the performance of the product is unstable;
for example, chinese patent application No. 201710572615.5 proposes an ultrathin weather-resistant fully biodegradable mulch film capable of being mechanically coated, which comprises the following raw materials in parts by weight: 88.7 parts of polyethylene glycol/butylene terephthalate, 5 parts of polylactic acid, 2 parts of hydrophobic nano silicon dioxide, 3 parts of silicon dioxide microspheres and 2341.5 parts of ultraviolet absorbent Tinuvin; the mulch film prepared from the components has the tensile strength of 33MPa at most and the right-angle tearing strength of 110MPa at most.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the weather-resistant full-biodegradable mulching film which can improve the weather resistance, ultraviolet resistance, mechanical property and oxidation resistance of the prepared mulching film and improve the stability of products by specific selection of raw materials.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
the invention provides a weather-resistant full-biodegradable mulching film, which is prepared from the following raw materials in parts by weight:
40-75 parts of PBAT, 8-15 parts of PBS, 5-8 parts of PVA, 2-5 parts of ternary organic alcohol, 0.1-0.5 part of plasticizer, 15-30 parts of inorganic filler, 3-6 parts of compatilizer, 0.1-3 parts of antioxidant and 0.5-5 parts of auxiliary agent.
Preferably, the weather-resistant full-biodegradable mulching film is prepared from the following raw materials in parts by weight:
60 parts of PBAT, 10 parts of PBS, 6 parts of PVA, 4 parts of ternary organic alcohol, 0.3 part of plasticizer, 20 parts of inorganic filler, 5 parts of compatilizer, 2 parts of antioxidant and 3 parts of auxiliary agent.
In the raw materials for preparing the mulching film, PBS, PVE and PBAT are mixed together to be used as carriers, the PBS and the PBAT are emulsified through the PVA, so that the compatibility among the carriers is improved, and the carriers have excellent film-forming performance and mechanical performance corresponding to the PBAT and the heat resistance of the PBS, so that the mechanical performance and the weather resistance of the prepared mulching film can be improved; in addition, through the addition of the ternary organic alcohol, the plasticizer and the inorganic filler, the adhesion performance among different carriers can be increased, and the toughness and the mechanical performance of the prepared mulching film are improved; and through the addition of the compatilizer, the antioxidant and the auxiliary agent, the full and uniform mixing of the raw materials can be better promoted, and the weather resistance and the overall performance of the prepared mulching film are improved.
Preferably, the trihydric organic alcohol is at least one selected from the group consisting of glycerol, polyether trihydric alcohol and polycaprolactone trihydric alcohol.
Through the specific selection of the ternary organic alcohol, the compatibility of PBAT, PBS and PVA can be better promoted, and the overall performance of the prepared mulching film is favorably improved.
Preferably, the plasticizer is di-n-butyl phthalate or polyethylene glycol.
Preferably, the inorganic filler is a mixture of silica and calcium carbonate; more preferably, the mass ratio of the silicon dioxide to the calcium carbonate in the inorganic filler is 2: 1-3, the particle size of the silicon dioxide is 1-3 nm, and the particle size of the calcium carbonate is 1-2 μm.
Preferably, the compatibilizing agent is an aluminate coupling agent. By selecting the specific coupling agent, the silicon dioxide and the calcium carbonate can be modified, the compatibility of the silicon dioxide and the calcium carbonate in the carrier resin is improved, and the raw materials are promoted to be fully mixed.
Preferably, the antioxidant is antioxidant 1010.
Preferably, the auxiliary agent is phenyl o-hydroxybenzoate.
The second aspect of the invention provides a preparation method of the weather-resistant full-biodegradable mulching film, which comprises the following steps:
weighing the raw materials according to the mass ratio;
uniformly mixing the inorganic filler and the compatilizer to obtain a first mixture;
uniformly mixing PBAT, PBS, PVA, ternary organic alcohol, plasticizer, antioxidant and auxiliary agent to obtain a second mixture;
adding the first mixture into the second mixture under the condition of 500-1000 r/min, and stirring for 20-30 min to obtain a third mixture;
and granulating and blowing the third mixture to obtain the weather-resistant full-biodegradable mulching film.
The specific method of granulation and film blowing is not strictly limited in the present invention, and the granulation and film blowing method conventional in the art may be employed; for example, an extruder can be used for extrusion granulation at 130-160 ℃, and then film blowing is carried out by film blowing equipment, so as to obtain the weather-resistant full-biodegradable mulching film.
The preparation method can better promote the full mixing of the raw materials by mixing the raw materials step by step, give full play to the performance of the raw materials and improve the overall performance of the prepared mulching film.
The invention has the beneficial effects that:
in the raw materials for preparing the mulching film, PBS, PVE and PBAT are mixed together to be used as carriers, the PBS and the PBAT are emulsified through the PVA, so that the compatibility among the carriers is improved, and the carriers have excellent film-forming performance and mechanical performance corresponding to the PBAT and the heat resistance of the PBS, so that the mechanical performance and the weather resistance of the prepared mulching film can be improved; in addition, through the addition of the ternary organic alcohol, the plasticizer and the inorganic filler, the adhesion performance among different carriers can be increased, and the toughness and the mechanical performance of the prepared mulching film are improved; and through the addition of the compatilizer, the antioxidant and the auxiliary agent, the full and uniform mixing of the raw materials can be better promoted, and the weather resistance and the overall performance of the prepared mulching film are improved.
Detailed Description
The following describes embodiments of the present invention in detail. The following examples are merely for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains; the raw materials adopted in the embodiments of the invention can be purchased in the market.
Example 1
Weather-proof full-biodegradable mulching film
The weather-resistant full-biodegradable mulching film is prepared from the following raw materials in parts by weight:
75 parts of PBAT, 15 parts of PBS, 5 parts of PVA, 5 parts of ternary organic alcohol, 0.1 part of plasticizer, 30 parts of inorganic filler, 3 parts of compatilizer, 3 parts of antioxidant and 5 parts of auxiliary agent, wherein:
the ternary organic alcohol is glycerol;
the plasticizer is di-n-butyl phthalate;
the inorganic filler is selected from a mixture of silicon dioxide and calcium carbonate, the mass ratio of the silicon dioxide to the calcium carbonate is 2: 1, the particle size of the silicon dioxide is 1-3 nm, and the particle size of the calcium carbonate is 1-2 mu m;
the compatilizer is an aluminate coupling agent;
the antioxidant is antioxidant 1010;
the auxiliary agent is phenyl o-hydroxybenzoate.
Second, preparation method
The preparation method of the weather-resistant full-biodegradable mulching film comprises the following steps:
weighing the raw materials according to the mass ratio;
uniformly mixing the inorganic filler and the compatilizer to obtain a first mixture;
uniformly mixing PBAT, PBS, PVA, ternary organic alcohol, plasticizer, antioxidant and auxiliary agent to obtain a second mixture;
adding the first mixture into the second mixture under the condition of 500r/min, and stirring for 30min to obtain a third mixture;
and extruding and granulating the third mixture at 130-160 ℃ by using an extruder, and blowing the film by using film blowing equipment to obtain the weather-resistant full-biodegradable mulching film.
Example 2
Weather-proof full-biodegradable mulching film
The weather-resistant full-biodegradable mulching film is prepared from the following raw materials in parts by weight:
40 parts of PBAT, 8 parts of PBS, 8 parts of PVA, 2 parts of ternary organic alcohol, 0.5 part of plasticizer, 15 parts of inorganic filler, 6 parts of compatilizer, 0.1 part of antioxidant and 0.5 part of auxiliary agent, wherein:
the trihydric organic alcohol is polycaprolactone trihydric alcohol;
the plasticizer is polyethylene glycol;
the inorganic filler is selected from a mixture of silicon dioxide and calcium carbonate, the mass ratio of the silicon dioxide to the calcium carbonate is 2: 1-3, the particle size of the silicon dioxide is 1-3 nm, and the particle size of the calcium carbonate is 1-2 mu m;
the compatilizer is an aluminate coupling agent;
the antioxidant is antioxidant 1010;
the auxiliary agent is phenyl o-hydroxybenzoate.
Second, preparation method
The preparation method of the weather-resistant full-biodegradable mulching film comprises the following steps:
weighing the raw materials according to the mass ratio;
uniformly mixing the inorganic filler and the compatilizer to obtain a first mixture;
uniformly mixing PBAT, PBS, PVA, ternary organic alcohol, plasticizer, antioxidant and auxiliary agent to obtain a second mixture;
adding the first mixture into the second mixture under the condition of 1000r/min, and stirring for 20min to obtain a third mixture;
and extruding and granulating the third mixture at 130-160 ℃ by using an extruder, and blowing the film by using film blowing equipment to obtain the weather-resistant full-biodegradable mulching film.
Example 3
Weather-proof full-biodegradable mulching film
The weather-resistant full-biodegradable mulching film is prepared from the following raw materials in parts by weight:
60 parts of PBAT, 10 parts of PBS, 6 parts of PVA, 4 parts of ternary organic alcohol, 0.3 part of plasticizer, 20 parts of inorganic filler, 5 parts of compatilizer, 2 parts of antioxidant and 3 parts of auxiliary agent, wherein:
the trihydric organic alcohol is polyether trihydric alcohol;
the plasticizer is di-n-butyl phthalate;
the inorganic filler is selected from a mixture of silicon dioxide and calcium carbonate, the mass ratio of the silicon dioxide to the calcium carbonate is 1: 1, the particle size of the silicon dioxide is 1-3 nm, and the particle size of the calcium carbonate is 1-2 mu m;
the compatilizer is an aluminate coupling agent;
the antioxidant is antioxidant 1010;
the auxiliary agent is phenyl o-hydroxybenzoate.
Second, preparation method
The preparation method of the weather-resistant full-biodegradable mulching film comprises the following steps:
weighing the raw materials according to the mass ratio;
uniformly mixing the inorganic filler and the compatilizer to obtain a first mixture;
uniformly mixing PBAT, PBS, PVA, ternary organic alcohol, plasticizer, antioxidant and auxiliary agent to obtain a second mixture;
adding the first mixture into the second mixture at the speed of 800r/min, and stirring for 30min to obtain a third mixture;
and extruding and granulating the third mixture at 130-160 ℃ by using an extruder, and blowing the film by using film blowing equipment to obtain the weather-resistant full-biodegradable mulching film.
Comparative example 1
The comparative example is the weather-resistant full-biodegradable mulching film, the raw materials for preparing the weather-resistant full-biodegradable mulching film are basically the same as those of the mulching film in the example 3, and the difference is only that the inorganic filler with the same fraction is replaced by the trihydric organic alcohol;
the preparation method of the weather-resistant full-biodegradable mulching film is the same as that of the mulching film in the embodiment 3.
Comparative example 2
The preparation method in example 2 of this comparative example, which is the application document with patent application number 201710572615.5, is basically the same, except that the prepared mulching film is adjusted to have a thickness of 4 μm.
Comparative example 3
Weather-proof full-biodegradable mulching film
The raw materials for preparing the weather-resistant full-biodegradable mulching film are the same as those of the mulching film in the embodiment 3;
second, preparation method
The preparation method of the weather-resistant full-biodegradable mulching film comprises the following steps:
weighing the raw materials according to the mass ratio;
respectively placing the raw materials in a stirrer, and stirring for 30min at the speed of 800r/min to obtain a mixture;
and extruding and granulating the mixture at 130-160 ℃ by using an extruder, and blowing the mixture by using film blowing equipment to obtain the weather-resistant fully biodegradable mulching film.
Examples of the experiments
Obtaining the mulching films prepared in the embodiments 1-3 and the comparative examples 1-3, wherein the thickness of the mulching film is 4 μm;
the performances of the obtained mulching films are respectively detected according to a GB/T1040.3 plastic tensile property test method, and the detection results are shown in Table 1:
TABLE 1
As can be seen from Table 1:
compared with the performances of the mulching films prepared by the embodiments and the comparative examples, the mulching film prepared by the embodiments of the invention has higher tensile strength and elongation at break, and higher toughness and mechanical strength.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications and the substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention, and the corresponding technical solutions are all covered in the claims and the specification of the present invention.
Claims (10)
1. The weather-resistant full-biodegradable mulching film is characterized by being prepared from the following raw materials in parts by weight:
40-75 parts of PBAT, 8-15 parts of PBS, 5-8 parts of PVA, 2-5 parts of ternary organic alcohol, 0.1-0.5 part of plasticizer, 15-30 parts of inorganic filler, 3-6 parts of compatilizer, 0.1-3 parts of antioxidant and 0.5-5 parts of auxiliary agent.
2. The weather-resistant full-biodegradable mulching film according to claim 1, is characterized by being prepared from the following raw materials in parts by weight:
60 parts of PBAT, 10 parts of PBS, 6 parts of PVA, 4 parts of ternary organic alcohol, 0.3 part of plasticizer, 20 parts of inorganic filler, 5 parts of compatilizer, 2 parts of antioxidant and 3 parts of auxiliary agent.
3. The weather-resistant full biodegradable mulch film according to claim 1 or 2, wherein the trihydric organic alcohol is selected from at least one of glycerol, polyether trihydric alcohol and polycaprolactone trihydric alcohol.
4. The weather-resistant full biodegradable mulch film according to claim 1 or 2, wherein the plasticizer is di-n-butyl phthalate or polyethylene glycol.
5. The weather-resistant fully biodegradable mulch film according to claim 1 or 2 wherein the inorganic filler is a mixture of silica and calcium carbonate.
6. The weather-resistant full-biodegradable mulching film according to claim 5, wherein the inorganic filler comprises silica and calcium carbonate in a mass ratio of 2: 1-3, the silica has a particle size of 1-3 nm, and the calcium carbonate has a particle size of 1-2 μm.
7. The weather-resistant fully biodegradable mulch film according to claim 1 or 2, wherein the compatibiliser is an aluminate coupling agent.
8. The weather-resistant full-biodegradable mulch film according to claim 1 or 2, wherein the antioxidant is antioxidant 1010.
9. The weather-resistant full-biodegradable mulch film according to claim 1 or 2, wherein the adjuvant is phenyl ortho-hydroxybenzoate.
10. The preparation method of the weather-resistant full-biodegradable mulching film according to claim 1, which is characterized by comprising the following steps:
weighing the raw materials according to the mass ratio;
uniformly mixing the inorganic filler and the compatilizer to obtain a first mixture;
uniformly mixing PBAT, PBS, PVA, ternary organic alcohol, plasticizer, antioxidant and auxiliary agent to obtain a second mixture;
adding the first mixture into the second mixture under the condition of 500-1000 r/min, and stirring for 20-30 min to obtain a third mixture;
and granulating and blowing the third mixture to obtain the weather-resistant full-biodegradable mulching film.
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| CN112063125A (en) * | 2020-09-11 | 2020-12-11 | 新疆蓝山屯河高端新材料工程技术研究中心(有限公司) | Special material for preparing full-biodegradable mulching film, full-biodegradable mulching film prepared from special material and preparation method of mulching film |
Citations (5)
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| CN109796734A (en) * | 2019-01-29 | 2019-05-24 | 沈阳中博环保科技研发有限公司 | A kind of polylactic acid biodegradable composite material |
| CN110626038A (en) * | 2019-09-27 | 2019-12-31 | 广东崇熙环保科技有限公司 | Biodegradable film and method for producing same |
| CN110760169A (en) * | 2019-10-25 | 2020-02-07 | 深圳市鸿翔包装有限公司 | Barrier material and preparation method thereof |
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| CN112063125A (en) * | 2020-09-11 | 2020-12-11 | 新疆蓝山屯河高端新材料工程技术研究中心(有限公司) | Special material for preparing full-biodegradable mulching film, full-biodegradable mulching film prepared from special material and preparation method of mulching film |
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