CN117777602A - Degradable plastic master batch and preparation method thereof - Google Patents
Degradable plastic master batch and preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 73
- 239000004594 Masterbatch (MB) Substances 0.000 title claims abstract description 37
- 229920006238 degradable plastic Polymers 0.000 title claims abstract description 37
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 125
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 116
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 56
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 54
- 239000002994 raw material Substances 0.000 claims abstract description 29
- 230000015556 catabolic process Effects 0.000 claims abstract description 26
- 238000006731 degradation reaction Methods 0.000 claims abstract description 26
- 239000004743 Polypropylene Substances 0.000 claims abstract description 25
- -1 polypropylene Polymers 0.000 claims abstract description 25
- 229920001155 polypropylene Polymers 0.000 claims abstract description 25
- 239000011347 resin Substances 0.000 claims abstract description 25
- 229920005989 resin Polymers 0.000 claims abstract description 25
- 239000004014 plasticizer Substances 0.000 claims abstract description 19
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229920002472 Starch Polymers 0.000 claims abstract description 12
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 12
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 12
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 12
- 235000019698 starch Nutrition 0.000 claims abstract description 12
- 239000008107 starch Substances 0.000 claims abstract description 12
- 239000008117 stearic acid Substances 0.000 claims abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 47
- 238000003756 stirring Methods 0.000 claims description 41
- 238000001035 drying Methods 0.000 claims description 32
- 238000002156 mixing Methods 0.000 claims description 32
- 238000000498 ball milling Methods 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 229910021389 graphene Inorganic materials 0.000 claims description 29
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 25
- PEDCQBHIVMGVHV-UHFFFAOYSA-N glycerol group Chemical group OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 21
- 238000005406 washing Methods 0.000 claims description 20
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 claims description 18
- 238000007654 immersion Methods 0.000 claims description 18
- CTENFNNZBMHDDG-UHFFFAOYSA-N Dopamine hydrochloride Chemical compound Cl.NCCC1=CC=C(O)C(O)=C1 CTENFNNZBMHDDG-UHFFFAOYSA-N 0.000 claims description 17
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 17
- 229960001149 dopamine hydrochloride Drugs 0.000 claims description 17
- 239000000395 magnesium oxide Substances 0.000 claims description 17
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 17
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 17
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 17
- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 claims description 16
- 229910052882 wollastonite Inorganic materials 0.000 claims description 16
- 239000010456 wollastonite Substances 0.000 claims description 16
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 14
- 238000001354 calcination Methods 0.000 claims description 14
- 238000009210 therapy by ultrasound Methods 0.000 claims description 14
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 230000004048 modification Effects 0.000 claims description 12
- 238000012986 modification Methods 0.000 claims description 12
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 10
- 229920001661 Chitosan Polymers 0.000 claims description 10
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 10
- 239000004202 carbamide Substances 0.000 claims description 10
- 239000008367 deionised water Substances 0.000 claims description 10
- 229910021641 deionized water Inorganic materials 0.000 claims description 10
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 10
- 239000001509 sodium citrate Substances 0.000 claims description 10
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 239000000377 silicon dioxide Substances 0.000 claims description 9
- 239000007822 coupling agent Substances 0.000 claims description 7
- 230000001678 irradiating effect Effects 0.000 claims description 7
- DKVNPHBNOWQYFE-UHFFFAOYSA-N carbamodithioic acid Chemical compound NC(S)=S DKVNPHBNOWQYFE-UHFFFAOYSA-N 0.000 claims description 6
- 125000004177 diethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 6
- 239000012990 dithiocarbamate Substances 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 6
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 6
- 239000004408 titanium dioxide Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 23
- 230000000694 effects Effects 0.000 abstract description 19
- 239000004033 plastic Substances 0.000 abstract description 8
- 239000012752 auxiliary agent Substances 0.000 abstract description 2
- 239000000047 product Substances 0.000 abstract 2
- 239000008380 degradant Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 18
- 230000006872 improvement Effects 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 241000588724 Escherichia coli Species 0.000 description 2
- SPAGIJMPHSUYSE-UHFFFAOYSA-N Magnesium peroxide Chemical compound [Mg+2].[O-][O-] SPAGIJMPHSUYSE-UHFFFAOYSA-N 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000001782 photodegradation Methods 0.000 description 1
- 229920001896 polybutyrate Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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- 230000001954 sterilising effect Effects 0.000 description 1
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Abstract
The invention relates to the technical field of plastic master batches, and in particular discloses a degradable plastic master batch and a preparation method thereof, wherein the degradable plastic master batch comprises the following raw materials in parts by weight: 40-45 parts of polypropylene resin, 10-15 parts of starch, 8-12 parts of continuous functional agent, 6-10 parts of degradation agent, 4-7 parts of nano silver powder, 3-5 parts of modified nano silicon dioxide agent, 1-2 parts of stearic acid and 1-2 parts of plasticizer. According to the degradable plastic master batch disclosed by the invention, the polypropylene resin is matched with the starch raw material, the degradability and the antibacterial property of the system are enhanced by adding the nano silver powder and the degradant, the functional effect of the raw material is enhanced by taking the stearic acid and the plasticizer as auxiliary agents, and the continuous functional agent and the modified nano silicon dioxide agent are mutually matched and cooperate together to enhance the antibacterial property and the antibacterial durability of the product, meanwhile, the degradation performance effect of the system is optimized, the antibacterial property, the degradability and the fracture performance of the product are improved in a coordinated manner, and the integral performance effect of the system is optimized.
Description
Technical Field
The invention relates to the technical field of plastic master batches, in particular to a degradable plastic master batch and a preparation method thereof.
Background
The polypropylene plastic is a semi-crystalline thermoplastic plastic, has higher impact resistance, strong mechanical property and resistance to various organic solvents and acid-base corrosion, has wide application in industry and is one of common high polymer materials. After the traditional polypropylene plastic product enters the environment, the traditional polypropylene plastic product is difficult to degrade, so that the long-term and deep ecological environment problem is caused.
Chinese patent document CN114773723B shows a degradable polypropylene plastic, and a preparation method and application thereof, wherein the polypropylene plastic comprises polypropylene resin: 50-90 parts; degradation agent: 10-50 parts; and (3) filling: 10-20 parts of a lubricant; and (3) a plasticizer: 4-10 parts; the degradation agent consists of PCL, PBAT and PBA according to the mass ratio of 1: (0.2-1.5): (0.2-0.8) compounding according to the proportion; the mass ratio of the glycerol to the ethylene glycol is (1.2-2.3): 1, compounding in proportion; the document shows that although the polypropylene plastic can realize high-efficiency degradation performance, the function of requiring antibacterial property is indispensable, and in order to improve the antibacterial property and antibacterial durability of the product in the prior art, the antibacterial raw material and the raw material of the product are easy to cause agglomeration problem, so that degradation performance is reduced, the coordinated improvement of antibacterial property and degradation performance is difficult to realize, and the improvement of fracture performance of the existing product on the basis is unknown, and based on the fact, the invention has the difficulty of balancing the coordinated improvement of antibacterial property, degradation performance and fracture performance of the product.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a degradable plastic master batch and a preparation method thereof, so as to solve the problems in the prior art.
The invention solves the technical problems by adopting the following technical scheme:
the invention provides a degradable plastic master batch, which comprises the following raw materials in parts by weight:
40-45 parts of polypropylene resin, 10-15 parts of starch, 8-12 parts of continuous functional agent, 6-10 parts of degradation agent, 4-7 parts of nano silver powder, 3-5 parts of modified nano silicon dioxide agent, 1-2 parts of stearic acid and 1-2 parts of plasticizer.
Preferably, the degradable plastic master batch comprises the following raw materials in parts by weight:
42.5 parts of polypropylene resin, 12.5 parts of starch, 10 parts of continuous functional agent, 8 parts of degradation agent, 5.5 parts of nano silver powder, 4 parts of modified nano silicon dioxide agent, 1.5 parts of stearic acid and 1.5 parts of plasticizer.
Preferably, the polypropylene resin is propylene resin with the melt mass flow rate of 1-60 g/10min and the density of 0.89-0.91 g/cm under the condition of 230 ℃ and 2.16kg 3 The method comprises the steps of carrying out a first treatment on the surface of the The degradation agent is formed by mixing diethyl ferric dithiocarbamate and titanium dioxide according to the weight ratio of 2:1; the plasticizer is glycerol.
Preferably, the preparation method of the continuous modulation functional agent comprises the following steps:
s01: adding 2-4 parts of sodium dodecyl benzene sulfonate solution and 1-3 parts of glycolic acid into 5-10 parts of deionized water, then adding 1-3 parts of dopamine hydrochloride solution and 0.2-0.4 part of silane coupling agent, and stirring fully to obtain modified liquid;
s02: modification treatment of graphene:
s021: the graphene is firstly subjected to heat treatment at 270-280 ℃ for 5-10 min, and then cooled to 155-165 ℃ at the speed of 2-4 ℃/min;
s022: then cooling to 55-60 ℃ at a speed of 1-3 ℃/min;
s023: immersing the graphene of S022 into a modifying liquid which is 3-5 times of the total amount of the graphene of S022, immersing, filtering and drying to obtain a modified graphene agent;
s03: and performing ball milling continuous adjustment treatment on the modified graphene agent and the continuous adjustment agent according to the weight ratio of 3:2, and performing water washing and drying after ball milling is finished to obtain the continuous adjustment functional agent.
Preferably, the mass fraction of the sodium dodecyl benzene sulfonate solution is 10-15%; the concentration of the dopamine hydrochloride solution is 0.4-0.7 g/mL; the silane coupling agent is a coupling agent KH560.
Preferably, the immersion pressure of the immersion modification treatment is 10-15 MPa, and the immersion time is 20-30 min; the ball milling rotating speed of the ball milling continuous adjustment treatment is 1050-1150 r/min, and the ball milling is carried out for 1-2 h.
Preferably, the preparation method of the continuous preparation comprises the following steps:
and (3) irradiating the nano magnesium oxide in a proton irradiation box for 20-30 min with irradiation power of 300-350W, after the irradiation is finished, uniformly stirring and mixing 4-7 parts of the irradiated nano magnesium oxide, 1-3 parts of nano silica sol and 6-10 parts of 10% sodium citrate solution by mass fraction, finally adding 1-2 parts of urea and 3-4 parts of monoethanolamine, continuously stirring at a rotating speed of 550-650 r/min for 1-2 h, wherein the stirring temperature is 50-55 ℃, and after the stirring is finished, obtaining the continuous preparation.
Preferably, the preparation method of the modified nano silicon dioxide agent comprises the following steps:
s101: stirring and mixing nano silicon dioxide in hydrochloric acid solution with the total amount of 3-5 times of the nano silicon dioxide, washing with water, drying, and thermally calcining for 1-2 h at 350-370 ℃ to obtain pretreated nano silicon dioxide after the calcining is finished;
s102: adding 2-5 parts of wollastonite into 10-15 parts of sodium lignin sulfonate solution, then adding 4-7 parts of pretreated nano silicon dioxide and 2-4 parts of chitosan solution with mass fraction of 5%, carrying out ultrasonic treatment for 1-2 hours under the ultrasonic power of 450-500W, ending ultrasonic treatment, washing with water, and drying to obtain the modified nano silicon dioxide agent.
Preferably, the mass fraction of the hydrochloric acid solution is 2-5%; the mass fraction of the sodium lignin sulfonate solution is 10-15%.
The invention also provides a preparation method of the degradable plastic master batch, which comprises the following steps:
step one, uniformly mixing the raw materials according to the proportion;
secondly, feeding the uniformly mixed materials into a double-screw extruder for melt blending, bracing, granulating, and finally drying; the extrusion melting temperature is 190-195 ℃ and the screw rotating speed is 300-400 r/min, and the degradable plastic master batch can be obtained.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the degradable plastic master batch, the polypropylene resin is matched with the starch raw material, the degradability and the antibacterial property of the system are enhanced by adding the nano silver powder and the degradation agent, the functional effect of the raw material is enhanced by taking the stearic acid and the plasticizer as auxiliary agents, and the continuous functional agent and the modified nano silicon dioxide agent are mutually matched and cooperate together to enhance the antibacterial property and the antibacterial durability of the product, simultaneously, the degradation performance effect of the system is optimized, the antibacterial property, the degradability and the fracture performance of the product are improved in a coordinated manner, and the integral performance effect of the system is optimized;
2. the continuous regulating functional agent adopts graphene to be subjected to heat treatment at 270-280 ℃ for 5-10 min, and then is cooled to 155-165 ℃ at the speed of 2-4 ℃/min; then cooling to 55-60 ℃ at a speed of 1-3 ℃/min, optimizing the thermal efficiency performance of graphene through sectional temperature regulation thermal improvement, facilitating better distribution of graphene in a modified liquid system, wherein the modified liquid is prepared by mutually matching a sodium dodecyl benzene sulfonate solution, glycolic acid, a dopamine hydrochloride solution and an alkane coupling agent, so that the modified liquid can be well moistened and activated with graphene, the modified graphene agent liquid can be better cooperated and cooperated with a continuous preparation agent, the performance effect of the system is optimized, and the flaky graphene distribution system is cooperated with nano magnesium oxide and other raw materials in the continuous preparation agent to be synergized, so that the antibacterial property, the degradability and the fracture performance of the product are improved in a coordinated manner;
3. the continuous preparation adopts nano magnesium dioxide to optimize the activity and efficacy of the nano magnesium dioxide through proton irradiation, and then adopts the nano silica sol, sodium citrate solution, urea and monoethanolamine to coordinate and coordinate the raw materials to jointly strengthen the system effect, so that the continuous preparation can better coordinate and coordinate with the modified graphene agent to strengthen the performance effect of the system;
4. the modified nano silicon dioxide agent adopts nano silicon dioxide to be stirred and mixed uniformly in hydrochloric acid solution, then is calcined for 1-2 hours at 350-370 ℃, the dispersity and activity efficiency of the nano silicon dioxide are optimized, wollastonite, sodium lignin sulfonate solution and chitosan are matched for dissolution, and the high specific surface area effect of the nano silicon dioxide and the needle-shaped structure reinforcing system of the wollastonite are matched through the coordination improvement among raw materials, so that the modified nano silicon dioxide agent further cooperates with a continuous regulating functional agent, further the antibacterial property and the antibacterial durability of the system are enhanced, and meanwhile, the antibacterial property, the degradability and the fracture performance of the system are coordinated and optimized.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The degradable plastic master batch comprises the following raw materials in parts by weight:
40-45 parts of polypropylene resin, 10-15 parts of starch, 8-12 parts of continuous functional agent, 6-10 parts of degradation agent, 4-7 parts of nano silver powder, 3-5 parts of modified nano silicon dioxide agent, 1-2 parts of stearic acid and 1-2 parts of plasticizer.
The degradable plastic master batch comprises the following raw materials in parts by weight:
42.5 parts of polypropylene resin, 12.5 parts of starch, 10 parts of continuous functional agent, 8 parts of degradation agent, 5.5 parts of nano silver powder, 4 parts of modified nano silicon dioxide agent, 1.5 parts of stearic acid and 1.5 parts of plasticizer.
The polypropylene resin of this example was a propylene resin having a melt mass flow rate of 1% to over at 230℃under 2.16kg60g/10min, the density is 0.89-0.91 g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The degradation agent is formed by mixing diethyl ferric dithiocarbamate and titanium dioxide according to the weight ratio of 2:1; the plasticizer is glycerol.
The preparation method of the continuous modulation functional agent of the embodiment comprises the following steps:
s01: adding 2-4 parts of sodium dodecyl benzene sulfonate solution and 1-3 parts of glycolic acid into 5-10 parts of deionized water, then adding 1-3 parts of dopamine hydrochloride solution and 0.2-0.4 part of silane coupling agent, and stirring fully to obtain modified liquid;
s02: modification treatment of graphene:
s021: the graphene is firstly subjected to heat treatment at 270-280 ℃ for 5-10 min, and then cooled to 155-165 ℃ at the speed of 2-4 ℃/min;
s022: then cooling to 55-60 ℃ at a speed of 1-3 ℃/min;
s023: immersing the graphene of S022 into a modifying liquid which is 3-5 times of the total amount of the graphene of S022, immersing, filtering and drying to obtain a modified graphene agent;
s03: and performing ball milling continuous adjustment treatment on the modified graphene agent and the continuous adjustment agent according to the weight ratio of 3:2, and performing water washing and drying after ball milling is finished to obtain the continuous adjustment functional agent.
The mass fraction of the sodium dodecyl benzene sulfonate solution of the embodiment is 10-15%; the concentration of the dopamine hydrochloride solution is 0.4-0.7 g/mL; the silane coupling agent is a coupling agent KH560.
The immersion pressure of the immersion modification treatment of the embodiment is 10-15 MPa, and the immersion time is 20-30 min; the ball milling rotating speed of the ball milling continuous adjustment treatment is 1050-1150 r/min, and the ball milling is carried out for 1-2 h.
The preparation method of the continuous preparation of the embodiment comprises the following steps:
and (3) irradiating the nano magnesium oxide in a proton irradiation box for 20-30 min with irradiation power of 300-350W, after the irradiation is finished, uniformly stirring and mixing 4-7 parts of the irradiated nano magnesium oxide, 1-3 parts of nano silica sol and 6-10 parts of 10% sodium citrate solution by mass fraction, finally adding 1-2 parts of urea and 3-4 parts of monoethanolamine, continuously stirring at a rotating speed of 550-650 r/min for 1-2 h, wherein the stirring temperature is 50-55 ℃, and after the stirring is finished, obtaining the continuous preparation.
The preparation method of the modified nano silicon dioxide agent comprises the following steps:
s101: stirring and mixing nano silicon dioxide in hydrochloric acid solution with the total amount of 3-5 times of the nano silicon dioxide, washing with water, drying, and thermally calcining for 1-2 h at 350-370 ℃ to obtain pretreated nano silicon dioxide after the calcining is finished;
s102: adding 2-5 parts of wollastonite into 10-15 parts of sodium lignin sulfonate solution, then adding 4-7 parts of pretreated nano silicon dioxide and 2-4 parts of chitosan solution with mass fraction of 5%, carrying out ultrasonic treatment for 1-2 hours under the ultrasonic power of 450-500W, ending ultrasonic treatment, washing with water, and drying to obtain the modified nano silicon dioxide agent.
The mass fraction of the hydrochloric acid solution in the embodiment is 2-5%; the mass fraction of the sodium lignin sulfonate solution is 10-15%.
The preparation method of the degradable plastic master batch comprises the following steps:
step one, uniformly mixing the raw materials according to the proportion;
secondly, feeding the uniformly mixed materials into a double-screw extruder for melt blending, bracing, granulating, and finally drying; the extrusion melting temperature is 190-195 ℃ and the screw rotating speed is 300-400 r/min, and the degradable plastic master batch can be obtained.
Example 1
The degradable plastic master batch comprises the following raw materials in parts by weight:
40 parts of polypropylene resin, 10 parts of starch, 8 parts of continuous regulating functional agent, 6 parts of degradation agent, 4 parts of nano silver powder, 3 parts of modified nano silicon dioxide agent, 1 part of stearic acid and 1 part of plasticizer.
The polypropylene resin of this example was a propylene resin having a melt mass flow rate of 30g/10min and a density of 0.90g/cm at 230℃and 2.16kg 3 The method comprises the steps of carrying out a first treatment on the surface of the The degradation agent is formed by mixing diethyl ferric dithiocarbamate and titanium dioxide according to the weight ratio of 2:1; the plasticizer is glycerol.
The preparation method of the continuous modulation functional agent of the embodiment comprises the following steps:
s01: adding 2 parts of sodium dodecyl benzene sulfonate solution and 1 part of glycolic acid into 5 parts of deionized water, then adding 1 part of dopamine hydrochloride solution and 0.2 part of silane coupling agent, and stirring thoroughly to obtain a modified liquid;
s02: modification treatment of graphene:
s021: heat-treating graphene at 270 ℃ for 5min, and then cooling to 155 ℃ at a rate of 2 ℃/min;
s022: then cooling to 55 ℃ at a speed of 1 ℃/min;
s023: immersing the graphene of S022 in a modifying liquid which is 3 times of the total amount of the graphene of S022, immersing, filtering and drying to obtain a modified graphene agent;
s03: and performing ball milling continuous adjustment treatment on the modified graphene agent and the continuous adjustment agent according to the weight ratio of 3:2, and performing water washing and drying after ball milling is finished to obtain the continuous adjustment functional agent.
The mass fraction of the sodium dodecyl benzene sulfonate solution of the embodiment is 10%; the concentration of the dopamine hydrochloride solution is 0.4g/mL; the silane coupling agent is a coupling agent KH560.
The immersion pressure of the immersion modification treatment of this example was 10MPa, and the immersion time was 20min; the ball milling rotating speed of ball milling continuous adjustment treatment is 1050r/min, and ball milling is carried out for 1h.
The preparation method of the continuous preparation of the embodiment comprises the following steps:
and (3) irradiating the nano magnesium oxide in a proton irradiation box for 20min with irradiation power of 300W, after the irradiation is finished, stirring and uniformly mixing 4 parts of the irradiated nano magnesium oxide, 1 part of nano silica sol and 6 parts of 10% sodium citrate solution by mass fraction, finally adding 1 part of urea and 3 parts of monoethanolamine, continuously stirring at a rotating speed of 550r/min for 1h, wherein the stirring temperature is 50 ℃, and after the stirring is finished, obtaining the continuous preparation.
The preparation method of the modified nano silicon dioxide agent comprises the following steps:
s101: stirring and mixing nano silicon dioxide in hydrochloric acid solution with the total amount of 3 times of the nano silicon dioxide uniformly, washing with water, drying, and thermally calcining for 1h at 350 ℃ to obtain pretreated nano silicon dioxide after the calcining is finished;
s102: adding 2 parts of wollastonite into 10 parts of sodium lignin sulfonate solution, then adding 4 parts of pretreated nano silicon dioxide and 2 parts of chitosan solution with mass fraction of 5%, performing ultrasonic treatment under ultrasonic power of 450W for 1h, finishing ultrasonic treatment, washing with water, and drying to obtain the modified nano silicon dioxide agent.
The mass fraction of the hydrochloric acid solution in this example was 2%; the mass fraction of the sodium lignin sulfonate solution is 10%.
The preparation method of the degradable plastic master batch comprises the following steps:
step one, uniformly mixing the raw materials according to the proportion;
secondly, feeding the uniformly mixed materials into a double-screw extruder for melt blending, bracing, granulating, and finally drying; the extrusion melting temperature is 190 ℃, the screw rotating speed is 300r/min, and the degradable plastic master batch can be obtained.
Example 2
The degradable plastic master batch comprises the following raw materials in parts by weight:
45 parts of polypropylene resin, 15 parts of starch, 12 parts of continuous regulating functional agent, 10 parts of degradation agent, 7 parts of nano silver powder, 5 parts of modified nano silicon dioxide agent, 2 parts of stearic acid and 2 parts of plasticizer.
The polypropylene resin of this example was a propylene resin having a melt mass flow rate of 60g/10min and a density of 0.91g/cm at 230℃under 2.16kg 3 The method comprises the steps of carrying out a first treatment on the surface of the The degradation agent is formed by mixing diethyl ferric dithiocarbamate and titanium dioxide according to the weight ratio of 2:1; the plasticizer is glycerol.
The preparation method of the continuous modulation functional agent of the embodiment comprises the following steps:
s01: adding 4 parts of sodium dodecyl benzene sulfonate solution and 3 parts of glycolic acid into 10 parts of deionized water, then adding 3 parts of dopamine hydrochloride solution and 0.4 part of silane coupling agent, and stirring thoroughly to obtain a modified liquid;
s02: modification treatment of graphene:
s021: the graphene is subjected to heat treatment at 280 ℃ for 10min, and then cooled to 165 ℃ at a rate of 4 ℃/min;
s022: then cooling to 60 ℃ at a speed of 3 ℃/min;
s023: immersing the graphene of S022 in a modifying liquid which is 5 times of the total amount of the graphene of S022, immersing, filtering and drying to obtain a modified graphene agent;
s03: and performing ball milling continuous adjustment treatment on the modified graphene agent and the continuous adjustment agent according to the weight ratio of 3:2, and performing water washing and drying after ball milling is finished to obtain the continuous adjustment functional agent.
The mass fraction of the sodium dodecyl benzene sulfonate solution of the embodiment is 15%; the concentration of the dopamine hydrochloride solution is 0.7g/mL; the silane coupling agent is a coupling agent KH560.
The immersion pressure of the immersion modification treatment of this example was 15MPa, and the immersion time was 30min; the ball milling rotating speed of ball milling continuous adjustment treatment is 1150r/min, and ball milling is carried out for 2 hours.
The preparation method of the continuous preparation of the embodiment comprises the following steps:
and (3) irradiating the nano magnesium oxide in a proton irradiation box for 30min with 350W irradiation power, then stirring and mixing 7 parts of the irradiated nano magnesium oxide, 3 parts of nano silica sol and 10 parts of 10% sodium citrate solution uniformly, finally adding 2 parts of urea and 4 parts of monoethanolamine, continuously stirring at 650r/min for 2h, wherein the stirring temperature is 55 ℃, and stirring is finished to obtain the continuous preparation.
The preparation method of the modified nano silicon dioxide agent comprises the following steps:
s101: stirring and mixing nano silicon dioxide in hydrochloric acid solution with the total amount of 5 times of the nano silicon dioxide uniformly, washing with water, drying, and thermally calcining at 370 ℃ for 2 hours to obtain pretreated nano silicon dioxide after the calcining is finished;
s102: 5 parts of wollastonite is added into 15 parts of sodium lignin sulfonate solution, 7 parts of pretreated nano silicon dioxide and 4 parts of 5% mass fraction chitosan solution are then added, ultrasonic treatment is carried out for 2 hours under the ultrasonic power of 500W, and after ultrasonic treatment, the modified nano silicon dioxide agent is obtained through water washing and drying.
The mass fraction of the hydrochloric acid solution in this example is 5%; the mass fraction of the sodium lignin sulfonate solution is 15%.
The preparation method of the degradable plastic master batch comprises the following steps:
step one, uniformly mixing the raw materials according to the proportion;
secondly, feeding the uniformly mixed materials into a double-screw extruder for melt blending, bracing, granulating, and finally drying; the extrusion melting temperature is 195 ℃, the screw rotating speed is 400r/min, and the degradable plastic master batch can be obtained.
Example 3
The degradable plastic master batch comprises the following raw materials in parts by weight:
42.5 parts of polypropylene resin, 12.5 parts of starch, 10 parts of continuous functional agent, 8 parts of degradation agent, 5.5 parts of nano silver powder, 4 parts of modified nano silicon dioxide agent, 1.5 parts of stearic acid and 1.5 parts of plasticizer.
The polypropylene resin of this example was a propylene resin having a melt mass flow rate of 30g/10min and a density of 0.90g/cm at 230℃and 2.16kg 3 The method comprises the steps of carrying out a first treatment on the surface of the The degradation agent is formed by mixing diethyl ferric dithiocarbamate and titanium dioxide according to the weight ratio of 2:1; the plasticizer is glycerol.
The preparation method of the continuous modulation functional agent of the embodiment comprises the following steps:
s01: adding 3 parts of sodium dodecyl benzene sulfonate solution and 2 parts of glycolic acid into 7.5 parts of deionized water, then adding 2 parts of dopamine hydrochloride solution and 0.3 part of silane coupling agent, and stirring thoroughly to obtain a modified liquid;
s02: modification treatment of graphene:
s021: heat-treating graphene at 275 ℃ for 7.5min, and then cooling to 160 ℃ at a rate of 3 ℃/min;
s022: then cooling to 58 ℃ at a speed of 2 ℃/min;
s023: immersing the graphene of S022 in a modifying liquid which is 4 times of the total amount of the graphene of S022, immersing, filtering and drying to obtain a modified graphene agent;
s03: and performing ball milling continuous adjustment treatment on the modified graphene agent and the continuous adjustment agent according to the weight ratio of 3:2, and performing water washing and drying after ball milling is finished to obtain the continuous adjustment functional agent.
The mass fraction of the sodium dodecyl benzene sulfonate solution of the embodiment is 12.5%; the concentration of the dopamine hydrochloride solution is 0.55g/mL; the silane coupling agent is a coupling agent KH560.
The immersion pressure of the immersion modification treatment of this example was 12.5MPa, and the immersion time was 25 minutes; the ball milling rotating speed of ball milling continuous adjustment treatment is 1100r/min, and the ball milling is carried out for 1.5h.
The preparation method of the continuous preparation of the embodiment comprises the following steps:
and (3) irradiating the nano magnesium oxide in a proton irradiation box for 25min with 325W irradiation power, after the irradiation is finished, stirring and uniformly mixing 5.5 parts of irradiated nano magnesium oxide, 2 parts of nano silica sol and 8 parts of 10% sodium citrate solution by mass fraction, finally adding 1.5 parts of urea and 3.5 parts of monoethanolamine, continuously stirring at 600r/min for 1.5h, wherein the stirring temperature is 52.5 ℃, and finishing stirring to obtain the continuous preparation.
The preparation method of the modified nano silicon dioxide agent comprises the following steps:
s101: stirring and mixing nano silicon dioxide in hydrochloric acid solution with the total amount of 4 times of the nano silicon dioxide uniformly, washing with water, drying, and thermally calcining at 360 ℃ for 1.5 hours to obtain pretreated nano silicon dioxide after the calcining is finished;
s102: adding 3.5 parts of wollastonite into 12.5 parts of sodium lignin sulfonate solution, then adding 5.5 parts of pretreated nano silicon dioxide and 3 parts of 5% chitosan solution by mass, performing ultrasonic treatment for 1.5 hours under ultrasonic power of 475W, finishing ultrasonic treatment, washing with water, and drying to obtain the modified nano silicon dioxide agent.
The mass fraction of the hydrochloric acid solution of this example was 3.5%; the mass fraction of the sodium lignin sulfonate solution is 12.5%.
The preparation method of the degradable plastic master batch comprises the following steps:
step one, uniformly mixing the raw materials according to the proportion;
secondly, feeding the uniformly mixed materials into a double-screw extruder for melt blending, bracing, granulating, and finally drying; the extrusion melting temperature is 192 ℃, the screw rotating speed is 350r/min, and the degradable plastic master batch can be obtained.
Comparative example 1
Unlike example 3, no preconditioning agent was added.
Comparative example 2
The difference from example 3 is that the modified graphene agent liquid in the preparation of the continuous modulation functional agent is not treated with S021 and S022.
Comparative example 3
The difference from example 3 is that the modified graphene agent liquid is prepared without adding dopamine hydrochloride solution and silane coupling agent into the modified liquid.
Comparative example 4
The difference from example 3 is that sodium dodecylbenzenesulfonate solution and glycolic acid are not added to the modified liquid in the preparation of the modified graphene agent liquid.
Comparative example 5
The difference from example 3 is that the continuous preparation treatment was not used in the preparation of the continuous preparation functional agent.
Comparative example 6
The difference from example 3 is that the mass fraction of the sodium dodecylbenzenesulfonate solution is 8%; the concentration of dopamine hydrochloride solution is 0.8%.
Comparative example 7
The difference from example 3 is that no modified nanosilica agent was added.
Comparative example 8
The difference from example 3 is that the modified nano-silica agent was prepared without the treatment of S101.
Comparative example 9
The difference from example 3 is that the modified nano-silica agent was prepared without the treatment of S102.
Comparative example 10
Unlike example 3, wollastonite was not added in the treatment of S102.
Comparative example 11
The difference from example 3 is that the sodium lignin sulfonate solution in the S102 treatment is replaced by deionized water and no chitosan solution is added.
Comparative example 12
The difference from example 3 is that the preparation method of the modified nano silica agent is different:
stirring wollastonite in hydrochloric acid solution with the total amount of 4 times of the wollastonite, uniformly mixing, washing with water, drying, and thermally calcining at 360 ℃ for 1.5 hours to obtain pretreated wollastonite after the calcining is finished;
3.5 parts of pretreated wollastonite is added into 12.5 parts of sodium lignin sulfonate solution, then 3 parts of chitosan solution with mass fraction of 5% is added, ultrasonic treatment is carried out for 1.5 hours under ultrasonic power of 475W, after ultrasonic treatment is finished, water washing and drying are carried out, and the modified wollastonite is adopted to replace the modified nano silicon dioxide agent.
The products of examples 1 to 3 and comparative examples 1 to 12 were dropped under conventional conditions at a concentration of 2X 10 4 The method comprises the steps of (1) after CFU/g of escherichia coli is placed for 2 hours at normal temperature, measuring the content of the escherichia coli, measuring the sterilization rate, simultaneously testing the antibacterial durability of a product after scraping the product for 100 times, and simultaneously testing the degradability and the fracture performance of the product, wherein the test result is as follows;
from examples 1 to 3 and comparative examples 1 to 12,
the product of the embodiment 3 of the invention has excellent antibacterial performance and remarkable antibacterial durability effect under the conventional condition, and meanwhile, the elongation at break and 30d photodegradation rate performance are remarkable, and the antibacterial performance, the degradability and the elongation at break of the product can be improved in a coordinated manner;
as shown in comparative examples 1-6 and example 3, the antibacterial durability, the fracture property and the degradation performance of the product are obviously deteriorated due to the fact that the continuous functional agent is not added, and the performances of the product are deteriorated due to the fact that modified graphene agent liquid is not treated by S021 and S022, dopamine hydrochloride solution is not added into the modified liquid, silane coupling agent is not added into the modified liquid, sodium dodecyl benzene sulfonate solution and glycolic acid are not added into the modified liquid;
meanwhile, the mass fraction of the sodium dodecyl benzene sulfonate solution is 8%; the concentration of the dopamine hydrochloride solution is 0.8g/mL, the mass fraction of the raw materials is not in the interval range of the invention, the performance tends to be poor, meanwhile, continuous adjustment treatment is not adopted in the preparation of the continuous adjustment functional agent, the variation trend of the performance of the product in the preparation of the continuous adjustment functional agent is large, and the performance effect of the continuous adjustment functional agent prepared by adopting the specific method of the invention is most remarkable;
as shown in comparative example 1, comparative example 7 and example 3, one of the continuous preparation functional agent and the modified nano silicon dioxide agent is not added, the performance of the product has a remarkable deterioration tendency, and the product has the most remarkable performance effect by adopting the cooperation of the two agents;
as shown in comparative examples 7-12 and example 3, the modified nano-silica agent is not treated by S101 in preparation, the modified nano-silica agent is not treated by S102 in preparation, the performance of the product is prone to deterioration, wollastonite is not added in S102 treatment, sodium lignin sulfonate solution in S102 treatment is replaced by deionized water, chitosan solution is not added, the preparation method of the modified nano-silica agent is different, the performance of the product is prone to deterioration, the specific wollastonite raw material is matched with the pretreated nano-silica of S101 and the unique S102 process is adopted, the obtained modified nano-silica agent has the most remarkable performance effect, and the effect of the product cannot be obtained by other methods.
Based on the fact that the continuous adjustment greatly changes the performance of the product, further research is conducted on the following steps:
the preparation method of the continuous preparation comprises the following steps:
and (3) irradiating the nano magnesium oxide in a proton irradiation box for 25min with 325W irradiation power, after the irradiation is finished, stirring and uniformly mixing 5.5 parts of irradiated nano magnesium oxide, 2 parts of nano silica sol and 8 parts of 10% sodium citrate solution by mass fraction, finally adding 1.5 parts of urea and 3.5 parts of monoethanolamine, continuously stirring at 600r/min for 1.5h, wherein the stirring temperature is 52.5 ℃, and finishing stirring to obtain the continuous preparation.
Experimental example 1
As in example 3, except that monoethanolamine was not added to the preparation of the continuous preparation.
Experimental example 2
The procedure was as in example 3 except that no nanosilicon sol was added to the preparation of the continuous preparation, and the sodium citrate solution was replaced with deionized water.
Experimental example 3
As in example 3, except that the irradiation treatment was not used in the preparation of the continuous preparation.
Experimental example 4
The same as in example 3, except that no nanosilicon sol and urea were added.
Experimental example 5
The same as in example 3, except that the irradiated nano magnesium oxide was not added.
From experimental examples 1-5, it can be seen that the irradiation nano magnesium oxide is not added in the preparation of the continuous preparation, the performance of the product has the greatest influence factor in the preparation of the continuous preparation, and then monoethanolamine is not added, nano silica sol is not added in the preparation of the continuous preparation, meanwhile, deionized water is adopted for replacing sodium citrate solution, nano silica sol and urea are not added, and irradiation treatment is not adopted, the performance of the product has a poor trend, the specific raw materials of the invention are adopted for matching in the preparation of the continuous preparation, the performance effect of the product is the most obvious, and the effect of the invention cannot be achieved by adopting other raw materials for replacement.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (10)
1. The degradable plastic master batch is characterized by comprising the following raw materials in parts by weight:
40-45 parts of polypropylene resin, 10-15 parts of starch, 8-12 parts of continuous functional agent, 6-10 parts of degradation agent, 4-7 parts of nano silver powder, 3-5 parts of modified nano silicon dioxide agent, 1-2 parts of stearic acid and 1-2 parts of plasticizer.
2. The degradable plastic master batch according to claim 1, wherein the degradable plastic master batch comprises the following raw materials in parts by weight:
42.5 parts of polypropylene resin, 12.5 parts of starch, 10 parts of continuous functional agent, 8 parts of degradation agent, 5.5 parts of nano silver powder, 4 parts of modified nano silicon dioxide agent, 1.5 parts of stearic acid and 1.5 parts of plasticizer.
3. The degradable plastic master batch according to claim 1, wherein the polypropylene resin is propylene resin, the melt mass flow rate under the condition of 2.16kg at 230 ℃ is 1-60 g/10min, and the density is 0.89-0.91 g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The degradation agent is formed by mixing diethyl ferric dithiocarbamate and titanium dioxide according to the weight ratio of 2:1; the plasticizer is glycerol.
4. The degradable plastic master batch according to claim 1, wherein the preparation method of the continuous functional agent is as follows:
s01: adding 2-4 parts of sodium dodecyl benzene sulfonate solution and 1-3 parts of glycolic acid into 5-10 parts of deionized water, then adding 1-3 parts of dopamine hydrochloride solution and 0.2-0.4 part of silane coupling agent, and stirring fully to obtain modified liquid;
s02: modification treatment of graphene:
s021: the graphene is firstly subjected to heat treatment at 270-280 ℃ for 5-10 min, and then cooled to 155-165 ℃ at the speed of 2-4 ℃/min;
s022: then cooling to 55-60 ℃ at a speed of 1-3 ℃/min;
s023: immersing the graphene of S022 into a modifying liquid which is 3-5 times of the total amount of the graphene of S022, immersing, filtering and drying to obtain a modified graphene agent;
s03: and performing ball milling continuous adjustment treatment on the modified graphene agent and the continuous adjustment agent according to the weight ratio of 3:2, and performing water washing and drying after ball milling is finished to obtain the continuous adjustment functional agent.
5. The degradable plastic master batch according to claim 4, wherein the mass fraction of the sodium dodecyl benzene sulfonate solution is 10-15%; the concentration of the dopamine hydrochloride solution is 0.4-0.7 g/mL; the silane coupling agent is a coupling agent KH560.
6. The degradable plastic master batch according to claim 4, wherein the immersion pressure of the immersion modification treatment is 10-15 MPa, and the immersion time is 20-30 min; the ball milling rotating speed of the ball milling continuous adjustment treatment is 1050-1150 r/min, and the ball milling is carried out for 1-2 h.
7. The degradable plastic master batch according to claim 4, wherein the preparation method of the continuous regulator comprises the following steps:
and (3) irradiating the nano magnesium oxide in a proton irradiation box for 20-30 min with irradiation power of 300-350W, after the irradiation is finished, uniformly stirring and mixing 4-7 parts of the irradiated nano magnesium oxide, 1-3 parts of nano silica sol and 6-10 parts of 10% sodium citrate solution by mass fraction, finally adding 1-2 parts of urea and 3-4 parts of monoethanolamine, continuously stirring at a rotating speed of 550-650 r/min for 1-2 h, wherein the stirring temperature is 50-55 ℃, and after the stirring is finished, obtaining the continuous preparation.
8. The degradable plastic master batch according to claim 1, wherein the preparation method of the modified nano-silica agent is as follows:
s101: stirring and mixing nano silicon dioxide in hydrochloric acid solution with the total amount of 3-5 times of the nano silicon dioxide, washing with water, drying, and thermally calcining for 1-2 h at 350-370 ℃ to obtain pretreated nano silicon dioxide after the calcining is finished;
s102: adding 2-5 parts of wollastonite into 10-15 parts of sodium lignin sulfonate solution, then adding 4-7 parts of pretreated nano silicon dioxide and 2-4 parts of chitosan solution with mass fraction of 5%, carrying out ultrasonic treatment for 1-2 hours under the ultrasonic power of 450-500W, ending ultrasonic treatment, washing with water, and drying to obtain the modified nano silicon dioxide agent.
9. The degradable plastic master batch according to claim 8, wherein the mass fraction of the hydrochloric acid solution is 2-5%; the mass fraction of the sodium lignin sulfonate solution is 10-15%.
10. A method for preparing a degradable plastic master batch according to any one of claims 1 to 9, comprising the steps of:
step one, uniformly mixing the raw materials according to the proportion;
secondly, feeding the uniformly mixed materials into a double-screw extruder for melt blending, bracing, granulating, and finally drying; the extrusion melting temperature is 190-195 ℃ and the screw rotating speed is 300-400 r/min, and the degradable plastic master batch can be obtained.
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