CN111019306A - Enhanced bio-based full-biodegradable plastic film and preparation method thereof - Google Patents
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Abstract
The invention belongs to the technical field of high polymer materials, and particularly relates to an enhanced bio-based full-biodegradable plastic film which comprises the following components in parts by mass: 100 parts of full biodegradable resin, 350 parts of solvent 300-350 parts, 4-8 parts of chain extender, 40-50 parts of biomass material, 1-3 parts of lubricant, 10-20 parts of plasticizer and 0.5-1.5 parts of compatibilizer; the preparation method comprises the following steps: adding full-biodegradable resin into a solvent, adding a chain extender in a dissolved state, stirring and reacting completely, and evaporating the solvent to dryness; and (2) putting the obtained crosslinked fully biodegradable resin into an internal mixer, adding the biomass material, the lubricant, the plasticizer and the compatibilizer, carrying out internal mixing, putting the obtained blend into a double-screw extruder, extruding and granulating, and blowing the obtained resin particles by using a film blowing device to obtain the enhanced bio-based fully biodegradable plastic film. The invention can obviously improve the mechanical property of the bio-based full-biodegradable plastic film, improve the addition of biomass and further reduce the material cost.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and particularly relates to an enhanced bio-based fully biodegradable plastic film and a preparation method thereof.
Background
At present, plastic films are widely developed in many fields due to the advantages of light weight, high strength, stable chemical performance, low price and the like, but used plastic films are not processed properly and are mostly treated as solid waste, while common plastic wastes are difficult to naturally degrade in the environment, so that the pollution to the natural environment is more and more serious, and serious harm is caused to the life of people, and therefore, in order to solve the problem, biodegradable plastic films are paid more and more attention.
Most of the existing biodegradable plastic films are prepared by adopting biomasses such as starch, cellulose and the like and biodegradable resin through double screws, but the performance of a full-biodegradable material can be greatly reduced after the biomasses such as the starch, the cellulose and the like are added, and the purpose of obviously improving the performance of the material cannot be achieved through conventional blending modification; and the main body in the film material is biodegradable resin, so that the performance of the biodegradable resin is enhanced to become a means for effectively improving the performance of the material, but the effect of enhancing the chain extension of the resin by adding the chain extender is not ideal and the chain extension rate is not high only by processing the resin with double screws.
Therefore, there is a need to design a new reinforced bio-based fully biodegradable plastic film and a preparation method thereof to overcome the above problems.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide the enhanced bio-based fully biodegradable plastic film and the preparation method thereof, which can obviously improve the mechanical property of the bio-based fully biodegradable plastic film, improve the addition of biomass and further reduce the material cost.
In order to achieve the purpose, the technical scheme of the invention is that the enhanced bio-based full-biodegradable plastic film comprises the following components in parts by mass: 100 parts of full biodegradable resin, 300 parts of solvent, 350 parts of chain extender, 4-8 parts of biomass material, 1-3 parts of lubricant, 10-20 parts of plasticizer and 0.5-1.5 parts of compatibilizer.
Further, the fully biodegradable resin comprises at least one of polylactic acid, polybutylene terephthalate-adipate-butylene glycol, polybutylene terephthalate-butylene succinate, polybutylene succinate-adipate-butylene glycol, polybutylene adipate, polycaprolactone and polyhydroxyalkanoate.
The solvent is any one of chloroalkanes and phenols such as dichloromethane, tetrahydrofuran, chloroform, acetone, phenol, tetrachloroethane, and the like.
Further, the chain extender is any one of bifunctional acid derivatives, isocyanate compounds, anhydride compounds and epoxides. The bifunctional acid derivative comprises 2, 2-dimethylolbutyric acid, 2-dimethylolpropionic acid and the like; the isocyanate compound comprises diisocyanate, p-phenylene diisocyanate and the like; the acid anhydride compound includes phthalic anhydride, maleic anhydride, trimellitic acid glycoside, methyl benzene diluted acid glycoside, benzoic anhydride, etc.; the epoxides include 1, 2-epoxy-4-vinylcyclohexane, ethyl 2, 3-epoxypropionate, glycidyl methacrylate, and the like.
Further, the biomass material comprises at least one of starch, bamboo powder, straw powder and wood powder.
Further, the lubricant comprises any one of monoglyceride, white oil, polyethylene wax, silicone oil, calcium stearate, stearic acid, zinc stearate, and liquid paraffin.
Further, the plasticizer comprises at least one of water, ethylene glycol, 1, 2-propylene glycol, 1, 3-propylene glycol, 1, 2-butylene glycol, 1, 3-butylene glycol, 1, 4-butylene glycol, 1,2, 3-glycerol, pentaerythritol and pentanol.
Further, the compatibilizer comprises at least one of aluminate and titanate.
The invention also provides a preparation method of the enhanced bio-based fully biodegradable plastic film, which comprises the following steps:
1) adding the full-biodegradable resin into a solvent, adding a chain extender in a dissolved state, stirring and reacting completely, and evaporating the solvent to obtain the crosslinked full-biodegradable resin;
2) putting the prepared crosslinked fully biodegradable resin into an internal mixer, adding a biomass material, a lubricant, a plasticizer and a compatibilizer, and internally mixing for 20-30 min;
3) putting the blend obtained after banburying into a double-screw extruder for extrusion and granulation to obtain enhanced fully biodegradable resin particles;
4) and blowing the manufactured enhanced fully biodegradable resin particles by using a film blowing device to obtain the enhanced bio-based fully biodegradable plastic film.
Further, the step 1) is specifically as follows: putting the full-biodegradable resin into a reaction kettle which is filled with a solvent and is provided with a condensing system, heating to 45 ℃, adding a chain extender while stirring after the full-biodegradable resin is completely dissolved, continuously stirring for reaction for 30min, closing the condensing system, evaporating the solvent to dryness to obtain the crosslinked full-biodegradable resin, and recovering the solvent.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention can obviously improve the mechanical property of the bio-based full-biodegradable plastic film, improve the addition of biomass materials and further reduce the material cost;
(2) according to the invention, the fully biodegradable resin is firstly dissolved in the solvent, the chain extender is added and stirred, so that the chain extender is fully contacted and reacted with the resin, the obtained chain-extended resin is blended with the biomass material, the lubricant, the plasticizer and the compatibilizer, and the performance of the obtained bio-based fully biodegradable plastic film is greatly improved.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides an enhanced bio-based full-biodegradable plastic film which comprises the following components in parts by mass: 100 parts of full biodegradable resin, 300 parts of solvent, 350 parts of chain extender, 4-8 parts of biomass material, 1-3 parts of lubricant, 10-20 parts of plasticizer and 0.5-1.5 parts of compatibilizer.
The invention also provides a preparation method of the enhanced bio-based fully biodegradable plastic film, which comprises the following steps:
1) adding the full-biodegradable resin into a solvent, adding a chain extender in a dissolved state, stirring and reacting completely, and evaporating the solvent to obtain the crosslinked full-biodegradable resin;
2) putting the prepared crosslinked fully biodegradable resin into an internal mixer, adding a biomass material, a lubricant, a plasticizer and a compatibilizer, and internally mixing for 20-30 min;
3) putting the blend obtained after banburying into a double-screw extruder for extrusion and granulation to obtain enhanced fully biodegradable resin particles;
4) and blowing the manufactured enhanced fully biodegradable resin particles by using a film blowing device to obtain the enhanced bio-based fully biodegradable plastic film.
The method of the invention is adopted to dissolve the full-biodegradable resin in the solvent, the chain extender is added and stirred, the chain extender is fully contacted and reacted with the resin, the obtained chain-extended resin is blended with the biomass material, the lubricant, the plasticizer and the compatibilizer, and the performance of the obtained bio-based full-biodegradable plastic film is greatly improved.
Example 1
The embodiment provides an enhanced bio-based full-biodegradable plastic film, which comprises the following components in parts by mass: 100 parts of poly (terephthalic acid) -butanediol adipate, 300 parts of dichloromethane, 5 parts of diisocyanate, 45 parts of starch, 1 part of white oil, 15 parts of glycerol and 1 part of aluminate.
The embodiment also provides a preparation method of the enhanced bio-based fully biodegradable plastic film, which comprises the following steps:
1) putting the poly (terephthalic acid) -adipic acid-butanediol ester into a reaction kettle which is provided with dichloromethane and is provided with a condensation system, heating to 45 ℃, adding diisocyanate while stirring after the poly (terephthalic acid) -adipic acid-butanediol ester is completely dissolved, continuously stirring for reaction for 30min, closing the condensation system, evaporating dichloromethane to dryness to obtain cross-linked fully biodegradable resin, and recovering the solvent to a recovery bottle for secondary utilization;
2) putting the prepared crosslinked fully biodegradable resin into an internal mixer, adding starch, white oil, glycerol and aluminate, and internally mixing for 20 min;
3) putting the blend obtained after banburying into a double-screw extruder for extrusion and granulation to obtain enhanced fully biodegradable resin particles;
4) and blowing the manufactured enhanced fully biodegradable resin particles by using a film blowing device to obtain the enhanced bio-based fully biodegradable plastic film.
Comparative example 1
Comparative example 1 provides a biodegradable plastic film comprising the following components in parts by mass: 100 parts of poly (terephthalic acid) -butanediol adipate, 5 parts of diisocyanate, 45 parts of starch, 1 part of white oil, 15 parts of glycerol and 1 part of aluminate; the preparation method adopts conventional blending, and comprises the following specific steps: putting poly (terephthalic acid) -adipate-butylene glycol ester, diisocyanate, starch, white oil, glycerol and aluminate into an internal mixer, and internally mixing for 20min to obtain a uniformly mixed material; then extruding and granulating through a double-screw extruder; finally, blowing the film by using film blowing equipment to prepare the biodegradable plastic film.
Example 2
The embodiment provides an enhanced bio-based full-biodegradable plastic film, which comprises the following components in parts by mass: 100 parts of polybutylene succinate, 350 parts of dichloromethane, 5 parts of p-phenylene diisocyanate, 45 parts of bamboo powder, 1 part of liquid paraffin, 15 parts of ethylene glycol and 1 part of titanate.
The embodiment also provides a preparation method of the enhanced bio-based fully biodegradable plastic film, which comprises the following steps:
1) putting poly (butylene succinate) into a reaction kettle which is filled with dichloromethane and provided with a condensation system, heating to 45 ℃, adding p-phenylene diisocyanate while stirring after the poly (butylene succinate) is completely dissolved, continuing stirring for reaction for 30min, closing the condensation system, evaporating the dichloromethane to dryness to obtain crosslinked fully biodegradable resin, and recovering the solvent to a recovery bottle for secondary utilization;
2) putting the prepared crosslinked full-biodegradable resin into an internal mixer, adding bamboo powder, liquid paraffin, ethylene glycol and titanate, and internally mixing for 20 min;
3) putting the blend obtained after banburying into a double-screw extruder for extrusion and granulation to obtain enhanced fully biodegradable resin particles;
4) and blowing the manufactured enhanced fully biodegradable resin particles by using a film blowing device to obtain the enhanced bio-based fully biodegradable plastic film.
Comparative example 2
Comparative example 1 provides a biodegradable plastic film comprising the following components in parts by mass: 100 parts of polybutylene succinate, 5 parts of p-phenylene diisocyanate, 45 parts of bamboo powder, 1 part of liquid paraffin, 15 parts of ethylene glycol and 1 part of titanate; the preparation method adopts conventional blending, and comprises the following specific steps: putting polybutylene succinate, p-phenylene diisocyanate, bamboo powder, liquid paraffin, ethylene glycol and titanate into an internal mixer, and carrying out internal mixing for 20min to obtain a uniformly mixed material; then extruding and granulating through a double-screw extruder; finally, blowing the film by using film blowing equipment to prepare the biodegradable plastic film.
Example 3
The embodiment provides an enhanced bio-based full-biodegradable plastic film, which comprises the following components in parts by mass: 50 parts of polybutylene succinate, 50 parts of polybutylene adipate, 320 parts of trichloromethane, 4 parts of 2, 2-dimethylolpropionic acid, 30 parts of bamboo powder, 10 parts of wood powder, 3 parts of silicone oil, 10 parts of pentadiol and 0.5 part of aluminate.
The preparation method of the enhanced bio-based fully biodegradable plastic film of the embodiment is the same as that of the embodiment 1, and only the formulation is different.
Example 4
The embodiment provides an enhanced bio-based full-biodegradable plastic film, which comprises the following components in parts by mass: 30 parts of poly (terephthalic acid) -butanediol adipate, 70 parts of poly (terephthalic acid) -butanediol succinate, 350 parts of trichloromethane, 8 parts of maleic anhydride, 50 parts of starch, 2 parts of white oil, 10 parts of pentadiol, 10 parts of pentaerythritol, 0.5 part of aluminate and 1 part of titanate.
The preparation method of the enhanced bio-based fully biodegradable plastic film of the embodiment is the same as that of the embodiment 1, and only the formulation is different.
The mechanical properties of the films obtained in example 1, example 2, comparative example 1 and comparative example 2 were measured, and the results are shown in table 1.
As can be seen from Table 1, the film prepared by the preparation method provided by the invention has more excellent mechanical properties under the same biomass addition; on the premise of ensuring the product performance, the addition amount of biomass can be increased, thereby reducing the material cost.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The enhanced bio-based full-biodegradable plastic film is characterized by comprising the following components in parts by mass: 100 parts of full biodegradable resin, 300 parts of solvent, 350 parts of chain extender, 4-8 parts of biomass material, 1-3 parts of lubricant, 10-20 parts of plasticizer and 0.5-1.5 parts of compatibilizer.
2. The reinforced bio-based fully biodegradable plastic film according to claim 1, wherein: the full-biodegradable resin comprises at least one of polylactic acid, poly (terephthalic acid) -butanediol adipate, poly (terephthalic acid) -butanediol succinate, poly (butylene succinate), poly (succinic acid) -butanediol adipate, poly (butylene adipate), polycaprolactone and polyhydroxyalkanoate.
3. The reinforced bio-based fully biodegradable plastic film according to claim 1, wherein: the solvent is any one of dichloromethane, tetrahydrofuran, trichloromethane, acetone, phenol and tetrachloroethane.
4. The reinforced bio-based fully biodegradable plastic film according to claim 1, wherein: the chain extender is any one of bifunctional acid derivatives, isocyanate compounds, anhydride compounds and epoxides.
5. The reinforced bio-based fully biodegradable plastic film according to claim 1, wherein: the biomass material comprises at least one of starch, bamboo powder, straw powder and wood powder.
6. The reinforced bio-based fully biodegradable plastic film according to claim 1, wherein: the lubricant comprises any one of monoglyceride, white oil, polyethylene wax, silicone oil, calcium stearate, stearic acid, zinc stearate and liquid paraffin.
7. The reinforced bio-based fully biodegradable plastic film according to claim 1, wherein: the plasticizer comprises at least one of water, ethylene glycol, 1, 2-propylene glycol, 1, 3-propylene glycol, 1, 2-butanediol, 1, 3-butanediol, 1, 4-butanediol, 1,2, 3-glycerol, pentaerythritol and pentanol.
8. The reinforced bio-based fully biodegradable plastic film according to claim 1, wherein: the compatibilizer comprises at least one of aluminate and titanate.
9. A method for preparing the enhanced bio-based fully biodegradable plastic film according to any one of claims 1-8, comprising the following steps:
1) adding the full-biodegradable resin into a solvent, adding a chain extender in a dissolved state, stirring and reacting completely, and evaporating the solvent to obtain the crosslinked full-biodegradable resin;
2) putting the prepared crosslinked fully biodegradable resin into an internal mixer, adding a biomass material, a lubricant, a plasticizer and a compatibilizer, and internally mixing for 20-30 min;
3) putting the blend obtained after banburying into a double-screw extruder for extrusion and granulation to obtain enhanced fully biodegradable resin particles;
4) and blowing the manufactured enhanced fully biodegradable resin particles by using a film blowing device to obtain the enhanced bio-based fully biodegradable plastic film.
10. The method for preparing the enhanced bio-based fully biodegradable plastic film as claimed in claim 9, wherein: the step 1) is specifically as follows: putting the full-biodegradable resin into a reaction kettle which is filled with a solvent and is provided with a condensing system, heating to 45 ℃, adding a chain extender while stirring after the full-biodegradable resin is completely dissolved, continuously stirring for reaction for 30min, closing the condensing system, evaporating the solvent to dryness to obtain the crosslinked full-biodegradable resin, and recovering the solvent.
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Cited By (3)
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| CN112175330A (en) * | 2020-10-16 | 2021-01-05 | 中国天楹股份有限公司 | Completely biodegradable plastic film prepared from straws and preparation method thereof |
| CN112552654A (en) * | 2020-11-17 | 2021-03-26 | 中广核俊尔(浙江)新材料有限公司 | PBAT/PHA/wood flour composition suitable for preparing film and preparation and application thereof |
| CN112778723A (en) * | 2020-12-31 | 2021-05-11 | 武汉华丽环保科技有限公司 | Starch-based degradable desorption tube material and preparation method thereof |
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| CN112778723A (en) * | 2020-12-31 | 2021-05-11 | 武汉华丽环保科技有限公司 | Starch-based degradable desorption tube material and preparation method thereof |
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