Processing technology for degradable plastic
阅读说明：本技术 一种用于可降解塑料的加工工艺 (Processing technology for degradable plastic ) 是由 蔡胜 张滕飞 于 2020-12-30 设计创作，主要内容包括：本发明涉及塑料加工技术领域,特别是涉及一种用于可降解塑料的加工工艺,由以下方法制备而成：(1)将纳米FeSO-4溶液和Na-2CO-3溶液和纳米Si-3N-4混合,在400-500Hz下超声分散20-30min,于40-50℃下烘干,研磨成粉末,再置于马弗炉中于400-500℃下,在N-2下烧结,继而加入壳聚糖、CaCO-3、三元乙丙橡胶共聚物、聚β-羟基丁酸酯和联苯菊酯混合后研磨成粉末,再加入三聚磷酸钠溶液和盐酸胍溶液,搅拌均匀后,烘干得混合粉末；(2)将环氧树脂、甘油、聚乳酸和步骤(1)中的混合粉末混合,使用双螺杆挤出机挤出,再进入注塑机中成型。本发明制备出可降解,不易霉变,老化,被虫类啃咬塑料。(The invention relates to the technical field of plastic processing, in particular to a processing technology for degradable plastic, which is prepared by the following method: (1) will be provided withNano FeSO 4 Solution and Na 2 CO 3 Solution and nano-Si 3 N 4 Mixing, ultrasonic dispersing at 400-500Hz for 20-30min, drying at 40-50 deg.C, grinding into powder, and placing in muffle furnace at 400-500 deg.C under N 2 Sintering, adding chitosan and CaCO 3 Mixing the ethylene propylene diene monomer copolymer, the poly beta-hydroxybutyrate and the bifenthrin, grinding the mixture into powder, adding the sodium tripolyphosphate solution and the guanidine hydrochloride solution, stirring the mixture evenly, and drying the mixture to obtain mixed powder; (2) mixing epoxy resin, glycerol, polylactic acid and the mixed powder in the step (1), extruding by using a double-screw extruder, and then entering an injection molding machine for molding. The plastic prepared by the invention is degradable, and is not easy to mildew, age and be bitten by insects.)
1. The processing technology for the degradable plastic is characterized by being prepared by the following method:
(1) nano FeSO4Solution and Na2CO3Solution and nano-Si3N4Mixing, ultrasonic dispersing at 400-500Hz for 20-30min, drying at 40-50 deg.C, grinding into powder, and placing in muffle furnace at 400-500 deg.C under N2Sintering, adding chitosan and CaCO3Mixing the ethylene propylene diene monomer copolymer, the poly beta-hydroxybutyrate and the bifenthrin, grinding the mixture into powder, adding the sodium tripolyphosphate solution and the guanidine hydrochloride solution, stirring the mixture evenly, and drying the mixture to obtain mixed powder;
(2) mixing epoxy resin, glycerol, polylactic acid and the mixed powder in the step (1), extruding by using a double-screw extruder, and then entering an injection molding machine for molding.
2. The process according to claim 1, wherein the FeSO is added in step (1)4Solution Na2CO3Solution of nano Si3N4Chitosan and CaCO3The mass-volume ratio of the ethylene propylene diene monomer copolymer, the poly beta-hydroxybutyrate, the bifenthrin, the sodium tripolyphosphate solution and the guanidine hydrochloride solution is 40-50mL, 20-30mL, 15-20mg, 10-12mg, 2-3mg, 4-6mg, 2-3mg, 1-3mg, 12-15mL and 20-30 mL.
3. The process according to claim 1, wherein the mass-to-volume ratio of the epoxy resin, the glycerol, the polylactic acid in the step (2) and the mixed powder in the step (1) is 50-60 mg: 1-2 ml: 75-80 mg: 35-45 mg.
4. The process according to claim 1, wherein the FeSO is added in step (1)4The concentration of the solution is 50-60 mg/L; na (Na)2CO3The concentration of the solution is 30-40 mg/L.
5. The processing technology for degradable plastics according to claim 1, wherein the concentration of the sodium tripolyphosphate solution in the step (1) is 35-45 mg/L; the concentration of the guanidine hydrochloride solution is 50-65 mg/L.
6. A plastic packaging bag manufactured by the process for manufacturing a degradable plastic according to any one of claims 1 to 5.
Technical Field
The invention relates to the technical field of plastic processing, in particular to a processing technology for degradable plastic.
Background
Plastics are the most common and most used materials in daily life, in order to ensure the sustainable development of the environment, the consumption of plastics needs to be reduced, in particular, plastic products are inevitably used in food, medicine packaging and shopping processes in markets, in order to reduce the environmental pollution, degradable plastics enter the lives of people, but most of the degradable plastics are prepared from waste plant fibers, starch and other raw materials, and the raw materials are not only used in the using process, have poor toughness and bearing capacity, but also have poor heat resistance, are easy to age, wet and mildew, and are damaged by being eaten by other insects, so that the degradable plastics are inconvenient to use and store, and therefore, the prior art needs further improvement.
Disclosure of Invention
The invention aims to provide a processing technology for preparing degradable plastics which are degradable, difficult to mildew, age and bite by insects.
A processing technology for degradable plastics is prepared by the following steps:
(1) nano FeSO4Solution and Na2CO3Solution and nano-Si3N4Mixing, ultrasonic dispersing at 400-500Hz for 20-30min, drying at 40-50 deg.C, grinding into powder, and placing in muffle furnace at 400-500 deg.C under N2Sintering, adding chitosan and CaCO3Mixing the ethylene propylene diene monomer copolymer, the poly beta-hydroxybutyrate and the bifenthrin, grinding the mixture into powder, adding the sodium tripolyphosphate solution and the guanidine hydrochloride solution, stirring the mixture evenly, and drying the mixture to obtain mixed powder;
(2) mixing epoxy resin, glycerol, polylactic acid and the mixed powder in the step (1), extruding by using a double-screw extruder, and then entering an injection molding machine for molding.
Further, the method comprisesIn the step (1), FeSO4Solution Na2CO3Solution of nano Si3N4Chitosan and CaCO3The mass-volume ratio of the ethylene propylene diene monomer copolymer, the poly beta-hydroxybutyrate, the bifenthrin, the sodium tripolyphosphate solution and the guanidine hydrochloride solution is 40-50mL, 20-30mL, 15-20mg, 10-12mg, 2-3mg, 4-6mg, 2-3mg, 1-3mg, 12-15mL and 20-30 mL.
Further, the mass volume ratio of the epoxy resin, the glycerol, the polylactic acid and the mixed powder in the step (1) is 50-60mg, 1-2ml, 75-80mg, 35-45 mg.
Further, in the step (1), FeSO4The concentration of the solution is 50-60 mg/L; na (Na)2CO3The concentration of the solution is 30-40 mg/L.
Further, the concentration of the sodium tripolyphosphate solution in the step (1) is 35-45 mg/L; the concentration of the guanidine hydrochloride solution is 50-65 mg/L.
A plastic packaging bag is prepared by the processing technology for degradable plastics.
The plastic prepared by the invention has strong toughness, strong plasticity, is not easy to rot and age, has an antistatic effect, long service life, does not generate chemical harmful substances, and can supplement Fe in soil after being degraded+The content of (a).
Detailed Description
Example 1:
a processing technology for degradable plastics is prepared by the following steps:
(1) nano FeSO4Solution and Na2CO3Solution and nano-Si3N4Mixing, ultrasonically dispersing at 400Hz for 20min, oven drying at 40 deg.C, grinding into powder, and placing in muffle furnace at 400 deg.C under N2Sintering, adding chitosan and CaCO3Mixing the ethylene propylene diene monomer copolymer, the poly beta-hydroxybutyrate and the bifenthrin, grinding the mixture into powder, adding the sodium tripolyphosphate solution and the guanidine hydrochloride solution, stirring the mixture evenly, and drying the mixture to obtain mixed powder;
(2) mixing epoxy resin, glycerol, polylactic acid and the mixed powder in the step (1), extruding by using a double-screw extruder, and then entering an injection molding machine for molding.
In the step (1), FeSO4Solution Na2CO3Solution of nano Si3N4Chitosan and CaCO3The mass-volume ratio of the ethylene propylene diene monomer copolymer, the poly beta-hydroxybutyrate, the bifenthrin, the sodium tripolyphosphate solution and the guanidine hydrochloride solution is 40mL, 20mL, 15mg, 10mg, 2mg, 4mg, 2mg, 1mg, 12mL and 20 mL.
The mass volume ratio of the epoxy resin, the glycerol, the polylactic acid and the mixed powder in the step (1) is 50mg, 1ml, 75mg and 35 mg.
In the step (1), FeSO4The concentration of the solution is 50 mg/L; na (Na)2CO3The concentration of the solution was 30 mg/L.
The concentration of the sodium tripolyphosphate solution in the step (2) is 35 mg/L; the concentration of the guanidine hydrochloride solution was 50 mg/L.
A plastic packaging bag is prepared by the processing technology for degradable plastics.
Example 2:
a processing technology for degradable plastics is prepared by the following steps:
(1) nano FeSO4Solution and Na2CO3Solution and nano-Si3N4Mixing, ultrasonically dispersing at 450Hz for 25min, oven drying at 45 deg.C, grinding into powder, placing in muffle furnace at 450 deg.C, and adding N2Sintering, adding chitosan and CaCO3Mixing the ethylene propylene diene monomer copolymer, the poly beta-hydroxybutyrate and the bifenthrin, grinding the mixture into powder, adding the sodium tripolyphosphate solution and the guanidine hydrochloride solution, stirring the mixture evenly, and drying the mixture to obtain mixed powder;
(2) mixing epoxy resin, glycerol, polylactic acid and the mixed powder in the step (1), extruding by using a double-screw extruder, and then entering an injection molding machine for molding.
SaidFeSO in step (1)4Solution Na2CO3Solution of nano Si3N4Chitosan and CaCO3The mass-volume ratio of the ethylene propylene diene monomer copolymer, the poly beta-hydroxybutyrate, the bifenthrin, the sodium tripolyphosphate solution and the guanidine hydrochloride solution is 45mL, 25mL, 18mg, 11mg, 2.5mg, 5mg, 2.5mg, 2mg, 13mL and 25 mL.
The mass volume ratio of the epoxy resin, the glycerol, the polylactic acid and the mixed powder in the step (1) is 55mg to 1.5ml to 78mg to 40 mg.
In the step (1), FeSO4The concentration of the solution is 55 mg/L; na (Na)2CO3The concentration of the solution was 35 mg/L.
The concentration of the sodium tripolyphosphate solution in the step (2) is 40 mg/L; the concentration of the guanidine hydrochloride solution was 55 mg/L.
A plastic packaging bag is prepared by the processing technology for degradable plastics.
Example 3:
a processing technology for degradable plastics is prepared by the following steps:
(1) nano FeSO4Solution and Na2CO3Solution and nano-Si3N4Mixing, ultrasonically dispersing at 500Hz for 30min, oven drying at 50 deg.C, grinding into powder, and placing in muffle furnace at 500 deg.C under N2Sintering, adding chitosan and CaCO3Mixing the ethylene propylene diene monomer copolymer, the poly beta-hydroxybutyrate and the bifenthrin, grinding the mixture into powder, adding the sodium tripolyphosphate solution and the guanidine hydrochloride solution, stirring the mixture evenly, and drying the mixture to obtain mixed powder;
(2) mixing epoxy resin, glycerol, polylactic acid and the mixed powder in the step (1), extruding by using a double-screw extruder, and then entering an injection molding machine for molding.
In the step (1), FeSO4Solution Na2CO3Solution of nano Si3N4Chitosan and CaCO3Ethylene propylene diene monomer copolymer, poly beta-hydroxybutyrate and bifenthrinThe mass-volume ratio of the sodium tripolyphosphate solution to the guanidine hydrochloride solution is 50mL to 30mL to 20mg to 12mg to 3mg to 6mg to 3mg to 15mL to 30 mL.
The mass volume ratio of the epoxy resin, the glycerol, the polylactic acid and the mixed powder in the step (1) is 60mg, 2ml, 80mg and 45 mg.
In the step (1), FeSO4The concentration of the solution is 60 mg/L; na (Na)2CO3The concentration of the solution was 40 mg/L.
The concentration of the sodium tripolyphosphate solution in the step (2) is 45 mg/L; the concentration of the guanidine hydrochloride solution was 65 mg/L.
A plastic packaging bag is prepared by the processing technology for degradable plastics.
Test example 1:
the plastic specimens obtained in example 1 of the present invention were subjected to stretching using an electronic universal tester according to ASTM D638-2003 Plastic tensile Property test method, test thickness of the specimens was 10mm, and a stretching rate was 8mm/min, and 5 sets of parallel tests were made, and the results are as follows:
bearing pressure (MPa)
First group
186.5
Second group
178.3
Third group
156.6
Fourth group
191.2
Fifth group
177.3
As can be seen from the above, the tensile strength of the plastic prepared in example 1 of the present invention is higher than that of the plastic in the prior art, so the toughness and tensile property of the plastic are greatly superior to those of the plastic on the market.
Test example 2:
thermogravimetric analysis was performed on the plastic prepared in this example 1, and a thermogravimetric analyzer was used to test a sample under inert gas, wherein the mass of the sample was 30g, and the respective test results were as follows:
weight loss
Temperature (. degree.C.)
3%
298
6%
315
9%
426
12%
527
15%
618
From the above, the heat resistance of the plastic prepared by the invention is greatly higher than the temperature in the market, and the heat resistance is good.
Test example 3:
the plastic prepared in the example 1 is placed in a humid place where insects gather, is placed for 6 months, and after observation, no ant or insect stays around the plastic, the plastic is damaged, and is bitten, and the surface of the plastic has no aging performance.
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