CN113583416A - Self-repairing agricultural film and preparation process thereof - Google Patents
Self-repairing agricultural film and preparation process thereof Download PDFInfo
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- CN113583416A CN113583416A CN202111059141.7A CN202111059141A CN113583416A CN 113583416 A CN113583416 A CN 113583416A CN 202111059141 A CN202111059141 A CN 202111059141A CN 113583416 A CN113583416 A CN 113583416A
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- 238000002360 preparation method Methods 0.000 title abstract description 7
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical class CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000002994 raw material Substances 0.000 claims abstract description 14
- ZQBAKBUEJOMQEX-UHFFFAOYSA-N phenyl salicylate Chemical compound OC1=CC=CC=C1C(=O)OC1=CC=CC=C1 ZQBAKBUEJOMQEX-UHFFFAOYSA-N 0.000 claims abstract description 10
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 5
- 108010020346 Polyglutamic Acid Proteins 0.000 claims abstract description 5
- 229960000969 phenyl salicylate Drugs 0.000 claims abstract description 5
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 5
- 229920002643 polyglutamic acid Polymers 0.000 claims abstract description 5
- 239000004626 polylactic acid Substances 0.000 claims abstract description 5
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 3
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims abstract description 3
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims abstract description 3
- ZMKVBUOZONDYBW-UHFFFAOYSA-N 1,6-dioxecane-2,5-dione Chemical compound O=C1CCC(=O)OCCCCO1 ZMKVBUOZONDYBW-UHFFFAOYSA-N 0.000 claims abstract 2
- 239000003963 antioxidant agent Substances 0.000 claims abstract 2
- 230000003078 antioxidant effect Effects 0.000 claims abstract 2
- 239000000661 sodium alginate Substances 0.000 claims description 31
- 235000010413 sodium alginate Nutrition 0.000 claims description 31
- 229940005550 sodium alginate Drugs 0.000 claims description 31
- 239000012188 paraffin wax Substances 0.000 claims description 29
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 8
- 239000002270 dispersing agent Substances 0.000 claims description 8
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 238000000071 blow moulding Methods 0.000 claims description 6
- -1 poly butylene succinate Polymers 0.000 claims description 6
- 229920002401 polyacrylamide Polymers 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000004631 polybutylene succinate Substances 0.000 claims description 3
- 229920002961 polybutylene succinate Polymers 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- 229920003063 hydroxymethyl cellulose Polymers 0.000 claims description 2
- 229940031574 hydroxymethyl cellulose Drugs 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 239000002689 soil Substances 0.000 abstract description 23
- 230000000694 effects Effects 0.000 abstract description 5
- 239000002985 plastic film Substances 0.000 abstract description 4
- 229920006255 plastic film Polymers 0.000 abstract description 4
- 238000004321 preservation Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 229920002554 vinyl polymer Polymers 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000010101 extrusion blow moulding Methods 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 5
- 239000002667 nucleating agent Substances 0.000 description 5
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 229940072056 alginate Drugs 0.000 description 3
- 235000010443 alginic acid Nutrition 0.000 description 3
- 229920000615 alginic acid Polymers 0.000 description 3
- 239000000648 calcium alginate Substances 0.000 description 3
- 235000010410 calcium alginate Nutrition 0.000 description 3
- 229960002681 calcium alginate Drugs 0.000 description 3
- OKHHGHGGPDJQHR-YMOPUZKJSA-L calcium;(2s,3s,4s,5s,6r)-6-[(2r,3s,4r,5s,6r)-2-carboxy-6-[(2r,3s,4r,5s,6r)-2-carboxylato-4,5,6-trihydroxyoxan-3-yl]oxy-4,5-dihydroxyoxan-3-yl]oxy-3,4,5-trihydroxyoxane-2-carboxylate Chemical compound [Ca+2].O[C@@H]1[C@H](O)[C@H](O)O[C@@H](C([O-])=O)[C@H]1O[C@H]1[C@@H](O)[C@@H](O)[C@H](O[C@H]2[C@H]([C@@H](O)[C@H](O)[C@H](O2)C([O-])=O)O)[C@H](C(O)=O)O1 OKHHGHGGPDJQHR-YMOPUZKJSA-L 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000011575 calcium Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 229920000092 linear low density polyethylene Polymers 0.000 description 2
- 239000004707 linear low-density polyethylene Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 1
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
- IVJFXSLMUSQZMC-UHFFFAOYSA-N Dithiocyclopentene Natural products C1SC=CS1 IVJFXSLMUSQZMC-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- ALVFCPMBEQMVID-UHFFFAOYSA-N cyclopentene-1,2-dithiol Chemical group SC1=C(S)CCC1 ALVFCPMBEQMVID-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002362 mulch Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2405/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2401/00 or C08J2403/00
- C08J2405/04—Alginic acid; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2477/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2477/04—Polyamides derived from alpha-amino carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2491/00—Characterised by the use of oils, fats or waxes; Derivatives thereof
- C08J2491/06—Waxes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Protection Of Plants (AREA)
Abstract
The application relates to the field of plastic films, and particularly discloses a self-repairing agricultural film and a preparation process thereof. The self-repairing agricultural film comprises the following raw materials in parts by weight: 380-400 parts of acrylic acid modified polylactic acid; 200-350 parts of modified sodium alginate; 200-240 parts of poly (butylene succinate); 250-300 parts of polyglutamic acid; 3-20 parts of phenyl salicylate; 10-15 parts of sodium carboxymethylcellulose; 101020-25 parts of an antioxidant; the preparation process of the agricultural film comprises the following steps: step one, preparing modified sodium alginate. And step two, preparing the agricultural film. The agricultural film has the self-repairing function on the film and the effect of secondary film forming in soil.
Description
Technical Field
The application relates to the field of plastic films, in particular to a self-repairing agricultural film and a preparation process thereof.
Background
A plastic film is a film formed by blow molding, and is widely used in life and production processes. Agricultural films belong to one of the plastic films which are used exclusively in agriculture for covering crops and are therefore also referred to as "mulch films".
At present, the Chinese patent with the publication number of CN105199502B discloses a mulching film, which is prepared from the following raw materials in parts by weight: 2-15 parts of vinyl acetate-ethylene-vinyl versatate and 85-98 parts of water, or 2-15 parts of vinyl acetate-vinyl versatate-maleic acid ester and 85-98 parts of water, or 2-15 parts of vinyl acetate-acrylic ester and 85-98 parts of water, or 2-15 parts of vinyl acetate-ethylene-acrylic ester and 85-98 parts of water, which are calculated by weight.
The invention discloses a mulching film which comprises an upper layer, a middle layer and a lower layer which are sequentially arranged from top to bottom, and further comprises a PE nucleating agent layer and an infrared absorption layer, wherein the PE nucleating agent layer is arranged on the upper surface of the upper layer, the infrared absorption layer is arranged on the lower surface of the lower layer, the PE nucleating agent layer is made of 5-15% of nucleating agent and 85-95% of LLDPE, the nucleating agent is selected from organic phosphate or sorbitol and derivatives thereof, the infrared absorption layer is made of 5-15% of infrared absorption agent and 85-95% of LLDPE, and the infrared absorption agent is selected from dithiocyclopentene complex or transition metal composite oxide.
The above-described related art provides a mulching film that ensures the growth of crops by improving various properties of the mulching film, such as moisture retention, heat preservation, and easy degradation. However, similar to the above mulching film, once the surface of the mulching film is pierced by hard materials such as soil, various properties such as heat preservation and moisture retention are greatly reduced, and therefore, a new solution is required to solve the above problems.
Disclosure of Invention
In order to solve the problem that the ground film is punctured, the self-repairing agricultural film and the preparation process thereof are provided.
In a first aspect, the present application provides a self-healing agricultural film, which adopts the following technical scheme:
the self-repairing agricultural film comprises the following raw materials in parts by weight:
the modified sodium alginate comprises a sodium alginate inner core and a paraffin shell coated on the outer side of the sodium alginate.
By adopting the technical scheme, firstly, the surface of the modified sodium alginate is provided with the paraffin shell, so that the paraffin can reduce the heating of the sodium alginate in the modified sodium alginate during the high-temperature extrusion-blow molding process, and the sodium alginate is prevented from being decomposed during the extrusion-blow molding process;
secondly, paraffin can be partially dissolved in the extrusion-blow molding process and uniformly dispersed on the film to form a compact oil film, and the oil film has lipophilicity and hydrophobicity and can improve the sealing property, moisture retention capacity and heat preservation capacity of the film when the film is used;
thirdly, after the crops are harvested, residual paraffin in the soil can be burnt together by using a straw burning mode, so that the problem that the paraffin is remained in the soil and cannot be decomposed is avoided, and the paraffin is cooperated with a burning mode for fertilizing the soil after the crops are harvested; fourthly, because a large amount of sodium alginate is distributed in the film, when water in the soil contacts the sodium alginate, the sodium alginate can form alginate ions, and because the soil of the crops contains a large amount of Ca2+Thus, the film attached to the soil surface can cause Ca2+The calcium alginate gel is formed by crosslinking with alginate radical ions, and the gel forms a film at the punctured film, so that a self-repairing effect is generated on the film, the integrity of the film is ensured, and the heat preservation and moisture retention capacities of the film are improved;
fifthly, the alginate ions can permeate into the soil along with water in the soil, so that secondary film formation is performed in the soil, the heat preservation and moisture preservation capability in the soil is greatly improved, and the problem that the soil cannot be subjected to heat preservation and moisture preservation due to the fact that the film is blown away by wind is solved;
sixthly, the calcium alginate gel has good degradation performance, and Ca is generated after the calcium alginate is degraded2+Will return to the soil again, and when the film is covered next time, Ca will be added2+Can be repeatedly used;
in conclusion, the scheme has the self-repairing effect on the film and the effect of secondary film forming in soil, and the stability of the film is greatly improved.
Preferably, the raw materials also comprise 50-70 parts by weight of montmorillonite powder.
Through adopting above-mentioned technical scheme, the montmorillonite powder has the ability of adsorbed moisture, can lock external moisture and soil in the film, because the film directly contacts with soil again, consequently can avoid the problem of the moisture loss in the soil. And secondly, the water in the film can directly act on the sodium alginate to accelerate the dissolution of the sodium alginate, so that the self-repairing efficiency of the film and the molding of the secondary film are accelerated.
Preferably, the melting point of the paraffin is 57-63 ℃.
By adopting the technical scheme, the melting point of the paraffin is positioned in the interval, and the paraffin can be slowly dissolved during film extrusion-blow molding, so that the stability of the sodium alginate is protected.
Preferably, the raw materials also comprise 13-21 parts by weight of a dispersing agent.
By adopting the technical scheme, the dispersing agent has dispersing capacity, and can disperse the modified sodium alginate to the whole film, so that the coverage rate of the self-repairing function is improved.
Preferably, the dispersant is polyacrylamide.
By adopting the technical scheme, the cost of the polyacrylamide is low, and the dispersion efficiency is high.
Preferably, the film is transparent.
By adopting the technical scheme, the transparent film is free of pigment and is easy to degrade.
In a second aspect, the present application provides a process for preparing an agricultural film, which adopts the following technical scheme:
a preparation process of an agricultural film comprises the following steps:
step one, preparing modified sodium alginate, putting powdery sodium alginate into molten paraffin, stirring uniformly, injecting into a mold, cooling and solidifying, and demolding to obtain granular modified sodium alginate.
And step two, preparing an agricultural film, putting the acrylic acid modified polylactic acid, the modified sodium alginate, the poly butylene succinate, the polyglutamic acid, the phenyl salicylate, the sodium hydroxymethyl cellulose and the antioxidant 1010 in corresponding parts by weight into an extruder together, and then molding in a blow molding mode.
By adopting the technical scheme, the molten paraffin is below 65 ℃, the powdery sodium alginate is mixed in the molten paraffin in a stirring mode, after the mixture is cooled in a mould, the paraffin can be coated on the outer side of the sodium alginate and is solidified and molded, and the granular modified sodium alginate can be obtained after demoulding. The blow molding belongs to the prior art, and the agricultural film of the scheme can be obtained by directly putting materials into an extruder for blow molding.
Preferably, the weight ratio of the sodium alginate to the paraffin is 1: (2-4).
By adopting the technical scheme, in the weight ratio interval, on one hand, sodium alginate is not easy to be decomposed by heat in the extrusion-blow molding process, and on the other hand, the self-repairing efficiency of the formed film is high, and the secondary film forming efficiency in soil is high.
In summary, the present application has the following beneficial effects:
1. because the modified sodium alginate is adopted, and the modified sodium alginate comprises the sodium alginate inner core and the paraffin wax shell coated on the outer side of the sodium alginate, the film obtains the effects of self-repairing and secondary film forming in soil.
2. The preferred montmorillonite powder that adopts in this application because montmorillonite powder has the lock water function, therefore moisture in the soil is difficult to the outflow, and external moisture can be adsorbed on the film for moisture content in the film is high, has improved soil moisture retention ability, the self-repair of accelerated film and the efficiency of secondary filming in the soil.
3. According to the method, the powdery sodium alginate is put into the molten paraffin, the mixture is cooled and solidified while being stirred, and the mixture is crushed after being cooled and solidified, so that the granular modified sodium alginate is obtained.
Detailed Description
The present application will be described in further detail with reference to examples.
Examples
Example 1: a self-repairing agricultural film is a transparent film.
The components and the parts by weight thereof are shown in table 1, wherein the modified sodium alginate comprises a sodium alginate inner core and a paraffin wax outer shell coated outside the sodium alginate, the sodium alginate inner core is powdery sodium alginate, and the paraffin wax outer shell is paraffin wax coated outside the powdery sodium alginate; the melting point of the paraffin is 57-63 ℃.
The self-repairing agricultural film is prepared by the following steps:
step one, preparing modified sodium alginate.
And (3) preparing modified sodium alginate, namely putting powdery sodium alginate into molten paraffin, stirring uniformly, injecting into a mold, cooling and solidifying, and demolding to obtain granular modified sodium alginate. In the step, the weight ratio of the sodium alginate to the paraffin is 1: 2.
and step two, preparing the agricultural film.
Putting acrylic acid modified polylactic acid, modified sodium alginate, poly butylene succinate, polyglutamic acid, phenyl salicylate, sodium carboxymethylcellulose and antioxidant 1010 in corresponding parts by weight into an extruder together, and then molding in a blow molding manner to obtain the self-repairing agricultural film.
Examples 2 to 4: a self-healing agricultural film, which differs from example 1 in that: the components and parts by weight thereof are shown in table 1.
TABLE 1 Components and parts by weight of examples 1 to 4
Example 5: a self-healing agricultural film, which differs from example 1 in that: in the first step, the weight ratio of sodium alginate to paraffin is 1: 3.
example 6: a self-healing agricultural film, which differs from example 1 in that: in the first step, the weight ratio of sodium alginate to paraffin is 1: 4.
example 7: a self-healing agricultural film, which differs from example 1 in that: the raw materials also comprise 50 parts by weight of montmorillonite powder.
Example 8: a self-healing agricultural film, which differs from example 1 in that: the raw materials also comprise 60 parts by weight of montmorillonite powder.
Example 9: a self-healing agricultural film, which differs from example 1 in that: the raw materials also comprise 70 parts by weight of montmorillonite powder.
Example 10: a self-healing agricultural film, which differs from example 1 in that: the raw materials also comprise 13 parts by weight of a dispersant which is polyacrylamide.
Example 11: a self-healing agricultural film, which differs from example 1 in that: the raw materials also comprise 17 parts by weight of a dispersant which is polyacrylamide.
Example 12: a self-healing agricultural film, which differs from example 1 in that: the raw materials also comprise 21 parts by weight of a dispersant which is polyacrylamide.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. The self-repairing agricultural film is characterized by comprising the following raw materials in parts by weight:
380-400 parts of acrylic acid modified polylactic acid;
200-350 parts of modified sodium alginate;
200-240 parts of poly (butylene succinate);
250-300 parts of polyglutamic acid;
3-20 parts of phenyl salicylate;
10-15 parts of sodium carboxymethylcellulose;
101020-25 parts of an antioxidant;
the modified sodium alginate comprises a sodium alginate inner core and a paraffin shell coated on the outer side of the sodium alginate.
2. The self-healing agricultural film of claim 1, wherein: the raw materials also comprise 50-70 parts by weight of montmorillonite powder.
3. The self-repairing agricultural film of claim 1, wherein the paraffin wax has a melting point of 57-63 ℃.
4. The self-repairing agricultural film of claim 1, wherein the raw materials further comprise 13-21 parts by weight of a dispersant.
5. The self-healing agricultural film of claim 4, wherein the dispersant is polyacrylamide.
6. The self-healing agricultural film of claim 1, wherein the film is transparent.
7. A process for preparing an agricultural film according to any one of claims 1 to 6, comprising the steps of:
step one, preparing modified sodium alginate, namely putting powdery sodium alginate into molten paraffin, uniformly stirring, injecting into a mold, cooling and solidifying, and demolding to obtain granular modified sodium alginate;
and step two, preparing an agricultural film, putting the acrylic acid modified polylactic acid, the modified sodium alginate, the poly butylene succinate, the polyglutamic acid, the phenyl salicylate, the sodium hydroxymethyl cellulose and the antioxidant 1010 in corresponding parts by weight into an extruder together, and then molding in a blow molding mode.
8. The process for preparing an agricultural film as claimed in claim 7, wherein in the first step, the weight ratio of sodium alginate to paraffin is 1: (2-4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111059141.7A CN113583416A (en) | 2021-09-09 | 2021-09-09 | Self-repairing agricultural film and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111059141.7A CN113583416A (en) | 2021-09-09 | 2021-09-09 | Self-repairing agricultural film and preparation process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113583416A true CN113583416A (en) | 2021-11-02 |
Family
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| CN202111059141.7A Pending CN113583416A (en) | 2021-09-09 | 2021-09-09 | Self-repairing agricultural film and preparation process thereof |
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| US20160059511A1 (en) * | 2014-09-03 | 2016-03-03 | Inhon International Co., Ltd. | Transfer film and method for fabricating an emobossed unit |
| CN105949737A (en) * | 2016-05-31 | 2016-09-21 | 沧州沧硕塑业有限公司 | Degradable mulching film and preparation method thereof |
| CN111303597A (en) * | 2020-03-04 | 2020-06-19 | 上海力伟德化工有限公司 | Degradable filling master batch for film blowing and preparation method thereof |
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| WO2012075747A1 (en) * | 2010-12-10 | 2012-06-14 | 东南大学 | Paraffin phase change energy storage materials and preparation method thereof |
| CN103627151A (en) * | 2013-12-10 | 2014-03-12 | 浙江渤海卫生用品有限公司 | Polyester full-biodegradable mulch film |
| US20160059511A1 (en) * | 2014-09-03 | 2016-03-03 | Inhon International Co., Ltd. | Transfer film and method for fabricating an emobossed unit |
| CN105949737A (en) * | 2016-05-31 | 2016-09-21 | 沧州沧硕塑业有限公司 | Degradable mulching film and preparation method thereof |
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Application publication date: 20211102 |