CN113845718A - Preparation method of bamboo fiber/basalt fiber/polypropylene environment-friendly composite wire - Google Patents
Preparation method of bamboo fiber/basalt fiber/polypropylene environment-friendly composite wire Download PDFInfo
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- CN113845718A CN113845718A CN202111155923.0A CN202111155923A CN113845718A CN 113845718 A CN113845718 A CN 113845718A CN 202111155923 A CN202111155923 A CN 202111155923A CN 113845718 A CN113845718 A CN 113845718A
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- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
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Abstract
The invention relates to a preparation method of a bamboo fiber/basalt fiber/polypropylene environment-friendly composite wire, which comprises the following steps: s1: respectively drying the polypropylene particles, the basalt fibers and the bamboo fibers; s2: mixing polypropylene and bamboo fiber in a high-speed mixer, and preparing polypropylene/bamboo fiber master batch by using an extruder; s3: mixing polypropylene and basalt fiber in a high-speed mixer, and preparing polypropylene/basalt fiber master batch by using an extruder; s4: weighing the polypropylene/basalt fiber master batch, the polypropylene/bamboo fiber master batch and the self-made compatilizer according to a certain proportion, mixing and extruding to obtain the polypropylene/bamboo fiber/basalt fiber master batch; s5: weighing polypropylene, polypropylene/bamboo fiber/basalt fiber master batch, plasticizer and antioxidant according to a proportion, and performing melt extrusion granulation; s6: the obtained granules are subjected to wire drawing forming in a single-screw wire drawing machine, the method is convenient to operate and low in cost, and the prepared printing wire is high in strength and good in mechanical property.
Description
Technical Field
The invention belongs to the field of high polymer materials and molding processing thereof, and particularly relates to a preparation method of a bamboo fiber/basalt fiber/polypropylene environment-friendly composite wire.
Background
The polypropylene (PP) belongs to a thermoplastic material and has the problems of low modulus, poor impact strength, large shrinkage deformation, easy warping and the like, the prepared pure polypropylene 3D printing wire has insufficient strength, and the performance of the pure polypropylene 3D printing wire can be obviously improved by blending and modifying the pure polypropylene with fibers; at present, the 3D printing modified PP wire with better application is modified by carbon fiber, but with the increasing shortage of petrochemical resources, the environmental protection problem is serious, and the modified wire is not high in strength and limited in application due to poor carbon fiber dispersibility.
Bamboo fiber is a novel natural modified fiber material, and the low price has good degradation performance, accords with the environmental protection demand, and 3D who modifies PP with bamboo fiber prints wire rod intensity and improves to some extent, has the degradability, nevertheless because bamboo fiber has more hydroxyl, and natural product heat resistance is relatively poor, so prints water resistance, the thermal stability of goods relatively poor.
The basalt fiber is prepared by drawing pure natural basalt at high temperature, has high strength, modulus, heat resistance, alkali resistance, no toxicity, no combustion, simple raw materials and no pollutant discharge in the preparation process, and the 3D printing wire prepared by modifying PP with the basalt fiber has good mechanical property, but the degradation property of the printed product is poor and the cost is high.
The two fibers are used for modifying PP to prepare a 3D printing wire material by direct blending and hot melting extrusion, the compatibility between the fibers and the PP is poor, the overall performance of the obtained composite material is poor, and the use requirement cannot be met; the compatilizer used at present is PP-g- (styrene-co-maleic anhydride) or PP-g- (styrene-co-1, 2-polybutadiene), the former has good compatibilization effect on polypropylene/bamboo fibers, and the latter has good compatibilization effect on polypropylene/basalt fibers, but cannot meet the compatibilization requirement of the polypropylene/bamboo fiber/basalt fiber composite material.
Disclosure of Invention
In order to solve the technical problems, the invention provides a preparation method of a bamboo fiber/basalt fiber/polypropylene environment-friendly composite wire, which is characterized in that the bamboo fiber and the basalt fiber are jointly introduced into a PP material for modification, and the characteristics of low cost, degradability, high strength, good heat resistance and the like of the bamboo fiber are utilized to develop a high-strength environment-friendly PP composite material; meanwhile, referring to the preparation process of the color master batch for coloring plastics, the bamboo fiber and the basalt fiber are respectively blended with PP to prepare plastic master batches, the master batches are then blended and extruded to prepare bamboo fiber/basalt fiber/polypropylene master batches, and finally, the bamboo fiber/basalt fiber/polypropylene master batches are blended and extruded with PP granules to prepare the 3D printing wire.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of a bamboo fiber/basalt fiber/polypropylene environment-friendly composite wire comprises the following steps:
s1: drying the polypropylene particles in a blast vacuum oven at 70 ℃ for 30h-72h, drying the basalt fiber in a blast drying oven at 120 ℃ for 20h-50h, and drying the bamboo fiber in a blast vacuum oven at 60 ℃ for 10h-30 h;
s2: weighing polypropylene and bamboo fiber according to the mass ratio of 1:1 (based on the mass of the bamboo fiber), mixing in a high-speed mixer, uniformly stirring to obtain a resin mixture, adding the resin mixture into a main feeding bin of a double-screw extruder, wherein the temperature of a feeding section in the double-screw extrusion process is 160-;
s3: weighing polypropylene and basalt fiber according to a mass ratio of 1:1 (based on the mass of the basalt fiber), mixing in a high-speed mixer, uniformly stirring to obtain a resin mixture, adding the resin mixture into a main feeding bin of a double-screw extruder, wherein the temperature of a feeding section in the double-screw extrusion process is 160-;
s4: weighing polypropylene/basalt fiber master batch, polypropylene/bamboo fiber master batch and a compatilizer according to a certain proportion, wherein the compatilizer is PP-g- (styrene-co-maleic anhydride-co-1, 2-polybutadiene), mixing and uniformly stirring in a high-speed mixer to obtain a mixture, adding the mixture into a main feeding bin of a double-screw extruder, and performing melt extrusion granulation to obtain the polypropylene/bamboo fiber/basalt fiber master batch, wherein the temperature of a feeding section in the double-screw extrusion process is 160-plus 180 ℃, the temperature of a melting section is 190-plus 210 ℃, the temperature of a mixing section is 195-plus 215 ℃, and the temperature of an extrusion section is 190-plus 210 ℃;
s5: weighing polypropylene, polypropylene/bamboo fiber/basalt fiber master batch, plasticizer and antioxidant according to a certain proportion, mixing in a high-speed mixer, uniformly stirring to obtain a mixture, adding the mixture into a main feeding bin of a double-screw extruder, wherein the temperature of a feeding section in the double-screw extrusion process is 160-plus-180 ℃, the temperature of a melting section is 190-plus-210 ℃, the temperature of a mixing section is 195-plus-215 ℃, the temperature of an extrusion section is 190-plus-210 ℃, and performing melt extrusion granulation;
s6: the obtained granules were subjected to wire drawing molding in a single screw wire drawing machine at a screw rotation speed of 60-85rpm, gradually increased to a set rotation speed from 15rpm at the time of feeding, and at an extruder temperature of 150 ℃, 200 ℃, 210 ℃, 190 ℃ (die head) in this order.
The formula of the polypropylene, the bamboo fiber, the basalt fiber, the antioxidant, the compatilizer and the plasticizer is as follows: 30-90% of polypropylene, 0-50% of bamboo fiber, 5-50% of basalt fiber, 0-5% of antioxidant, 0-10% of compatilizer and 0-20% of plasticizer.
Further, the formula of the polypropylene, the bamboo fiber, the basalt fiber, the antioxidant, the compatilizer and the plasticizer is as follows: 40% -75% of polypropylene; 5% -20% of bamboo fiber; 10% -25% of basalt fibers; 0.5 to 1.5 percent of antioxidant; 5% -8% of a compatilizer; 3% -12% of plasticizer.
Further, the polypropylene is random polypropylene, homopolymerized polypropylene, copolymerized polypropylene or derivative polypropylene obtained by grafting and copolymerizing the polypropylene serving as matrix resin.
Further, the antioxidant is a mixture of a multi-component hindered phenol antioxidant and a phosphite antioxidant in a weight ratio of 3: 2.
Further, the plasticizer is one of collar phthalic acid ester, fatty acid ester and epoxy ester, and preferably a mixture of the fatty acid ester and the epoxy ester in a weight ratio of 1: 1.
The preparation method of the compatilizer in the step S4 comprises the following steps:
adding weighed toluene, styrene, maleic anhydride and 1, 2-polybutadiene into a three-neck flask provided with a stirring rod, a condenser pipe and a thermometer, wherein the mass ratio of the reactants is as follows: 10-70% of styrene, 20-60% of maleic anhydride and 0-30% of 1, 2-polybutadiene, introducing argon, heating, gradually heating to the required reaction temperature, wherein the reaction temperature is 70-140 ℃, starting stirring, reacting for 6-8 h, stopping the reaction, cooling, and filtering out precipitates; washing the precipitate in water with surfactant, and drying at 80 deg.C under reduced pressure to obtain product A, wherein A is random copolymer of styrene-maleic anhydride-1, 2-polybutadiene; then mixing a certain amount of the product A, dicumyl peroxide and polypropylene in a high-speed mixer, and carrying out extrusion granulation to prepare a master batch, wherein the mass ratio of the reactants is 10-38% of the product A and 62-90% of the polypropylene, the dosage of the dicumyl peroxide is 0.1-5% of the total mass of the product A and the polypropylene, the reaction temperature is 170-.
Further, the raw material ratio for preparing the product A is as follows: 25 to 50 percent of styrene, 35 to 55 percent of maleic anhydride, and 12 to 20 percent of 1, 2-polybutadiene.
Further, the dosage of dicumyl peroxide is 0.5-2% of the total mass of the product A and the polypropylene. Further, the raw material ratio for preparing the product B is as follows: and (3) a product A: 12 to 25 percent of polypropylene and 75 to 88 percent of polypropylene.
Further, the reaction temperature for preparing the product A is 90-110 ℃; the reaction temperature for the preparation of the product B is 180-200 ℃. Compared with the prior art, the invention has the following beneficial effects:
(1) styrene, maleic anhydride and 1, 2-polybutadiene are designed and introduced into the same molecular chain segment, the compatibilization capacity is improved through the synergistic effect of the styrene, the maleic anhydride and the 1, 2-polybutadiene, and a novel compatilizer PP-g- (styrene-co-maleic anhydride-co-1, 2-polybutadiene) is prepared, wherein: styrene can be compatible with most of high molecular chains, so that the system compatibility is increased; the polarity of the polyolefin can be changed by the anhydride ring, and the anhydride ring reacts with functional groups such as hydroxyl on the surface of the bamboo fiber, so that the material performance is improved; polybutadiene can generate a cross-linked structure to form larger molecules, so that the stability can be effectively enhanced; the surface tension of the polybutylene is similar to that of the polypropylene, and the compatibility is better; the polybutadiene has strong caking property, can increase the combination degree of the fiber and the polypropylene matrix, has obvious compatibilization effect on the polypropylene/bamboo fiber/basalt fiber composite material, and obviously improves the material performance.
(2) The bamboo fiber and the basalt fiber are introduced into the PP material together for modification, so that the high-strength environment-friendly 3D printing PP wire rod is prepared by taking the characteristics of low cost, degradability, high strength and good heat resistance of the basalt fiber and the like of the bamboo fiber into consideration;
(3) the preparation method comprises the steps of preparing master batches by respectively mixing fibers with PP (polypropylene), mixing the master batches to prepare fiber mixed master batches, and finally blending the master batches with the PP to extrude and prepare the wire rod, so that the distribution of the fibers in a PP matrix is effectively improved, and the material performance is improved;
(4) bamboo fiber, basalt fiber and polypropylene particles are dried before an experiment, and the prepared printing wire is high in strength and good in mechanical property.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
A preparation method of a bamboo fiber/basalt fiber/polypropylene environment-friendly composite wire comprises the following steps:
s1: drying the random polypropylene particles in a blast vacuum oven at 70 ℃ for 50h, drying the basalt fiber in a blast drying oven at 120 ℃ for 30h, and drying the bamboo fiber in a blast vacuum oven at 60 ℃ for 18 h;
s2: the random polypropylene and the bamboo fiber are mixed according to the mass ratio of 18%: weighing 18 percent of the components, mixing the components in a high-speed mixer, uniformly stirring the components to obtain a resin mixture, adding the resin mixture into a main feeding bin of a double-screw extruder, wherein the temperature of a feeding section in the double-screw extrusion process is 160-;
s3: the random polypropylene and the basalt fiber are mixed according to the mass ratio of 20%: weighing 20 percent of the components, mixing the components in a high-speed mixer, uniformly stirring the components to obtain a resin mixture, adding the resin mixture into a main feeding bin of a double-screw extruder, wherein the temperature of a feeding section in the double-screw extrusion process is 160-;
s4: weighing the random polypropylene/basalt fiber master batch, the random polypropylene/bamboo fiber master batch and the compatilizer (7%) according to a certain proportion, mixing in a high-speed mixer, uniformly stirring to obtain a mixture, adding the mixture into a main feeding bin of a double-screw extruder, wherein the temperature of a feeding section in the double-screw extrusion process is 160-;
s5: weighing random polypropylene (6%), random polypropylene/bamboo fiber/basalt fiber master batch, plasticizer (10%) and antioxidant (1%) according to a certain proportion, wherein the plasticizer is a mixture of fatty acid ester and epoxy ester according to a weight ratio of 1:1, mixing in a high-speed mixer, uniformly stirring to obtain a mixture, adding the mixture into a main feeding bin of a double-screw extruder, and performing melt extrusion granulation at a feeding section temperature of 160-;
s6: carrying out wire drawing molding on the obtained granules in a single-screw wire drawing machine, wherein the rotating speed of a screw is 60-85rpm, and the rotating speed is gradually increased to a set rotating speed from 15rpm during feeding; the temperature of the extruder was set to 150 ℃, 200 ℃, 210 ℃, 190 ℃ (die head)
The formula of the polypropylene, the bamboo fiber, the basalt fiber, the antioxidant, the compatilizer and the plasticizer is as follows: 44% of polypropylene; 18% of bamboo fiber; 20% of basalt fiber; 1 percent of oxidation resistance; 7% of a compatilizer; 10% of plasticizer.
The preparation method of the compatilizer in the step S4 comprises the following steps:
adding weighed toluene, styrene, maleic anhydride and 1, 2-polybutadiene into a three-neck flask provided with a stirring rod, a condenser pipe and a thermometer, wherein the mass ratio of reactants is as follows: 40% of styrene, 45% of maleic anhydride and 15% of 1, 2-polybutadiene, introducing argon, heating, gradually raising the temperature to the required reaction temperature of 110 ℃, starting stirring, stopping the reaction after reacting for 6-8 h, cooling and filtering out precipitates; washing the precipitate in water with surfactant, and drying at 80 deg.C under reduced pressure to obtain product A; then mixing a certain amount of the product A, dicumyl peroxide and polypropylene in a high-speed mixer, and extruding and granulating to prepare a master batch, wherein the mass ratio of the product A to the polypropylene is as follows: and (3) a product A: 15 percent of polypropylene, 85 percent of dicumyl peroxide, the amount of which is 1.2 percent of the total mass of the product A and the polypropylene, and the reaction temperature is 192 ℃, thus obtaining the compatilizer B.
Comparative example 1
A printing wire was prepared in the same manner as in example 1 except that PP-g- (styrene-co-maleic anhydride) was used as the compatibilizer.
Example 2
A preparation method of a bamboo fiber/basalt fiber/polypropylene environment-friendly composite wire comprises the following steps:
s1: placing the copolymerized polypropylene particles in a blast vacuum oven to dry for 60 hours at 70 ℃, placing the basalt fiber in a blast drying oven to dry for 38 hours at 120 ℃, and placing the bamboo fiber in a blast vacuum oven to dry for 22 hours at 60 ℃;
s2: weighing the polypropylene copolymer and the bamboo fiber according to the mass ratio (6%: 6%), mixing in a high-speed mixer, uniformly stirring to obtain a resin mixture, adding the resin mixture into a main feeding bin of a double-screw extruder, wherein the temperature of a feeding section in the double-screw extrusion process is 160-;
s3: weighing the polypropylene copolymer and the basalt fiber according to the mass ratio (22%: 22%), mixing in a high-speed mixer, uniformly stirring to obtain a resin mixture, adding the resin mixture into a main feeding bin of a double-screw extruder, wherein the temperature of a feeding section in the double-screw extrusion process is 160-;
s4: weighing the polypropylene copolymer/basalt fiber master batch, the polypropylene copolymer/bamboo fiber master batch and the compatilizer (6.5%) according to a certain proportion, mixing in a high-speed mixer, uniformly stirring to obtain a mixture, adding the mixture into a main feeding bin of a double-screw extruder, wherein the temperature of a feeding section in the double-screw extrusion process is 160-plus-180 ℃, the temperature of a melting section is 190-plus-210 ℃, the temperature of a mixing section is 195-plus-215 ℃, the temperature of an extrusion section is 190-plus-210 ℃, and performing melt extrusion granulation to obtain the polypropylene copolymer/bamboo fiber/basalt fiber master batch;
s5: weighing 28.3 percent of copolymerized polypropylene, 8 percent of copolymerized polypropylene/bamboo fiber/basalt fiber master batch, 8 percent of plasticizer and 1.2 percent of antioxidant according to a certain proportion, wherein the plasticizer is a mixture of fatty acid ester and epoxy ester according to the weight ratio of 1:1, mixing in a high-speed mixer, uniformly stirring to obtain a mixture, adding the mixture into a main feeding bin of a double-screw extruder, and performing melt extrusion granulation at the temperature of 160-180 ℃ in a feeding section, 190-210 ℃ in a melting section, 195-215 ℃ in a mixing section, 190-210 ℃ in an extrusion section in the process of double-screw extrusion;
s6: and carrying out wire drawing molding on the obtained granules in a single-screw wire drawing machine, wherein the screw rotating speed is 60-85rpm, and the rotating speed is gradually increased to the set rotating speed from 15rpm during feeding. The extruder temperature was set to 150 ℃, 200 ℃, 210 ℃, 190 ℃ (die head) in this order.
The formula of the polypropylene, the bamboo fiber, the basalt fiber, the antioxidant, the compatilizer and the plasticizer is as follows: 56.3 percent of polypropylene; 6% of bamboo fiber; 22% of basalt fibers; 1.2 percent of antioxidant; 6.5% of a compatilizer; 8% of plasticizer.
The preparation method of the compatilizer in the step S4 comprises the following steps: adding weighed toluene, styrene, maleic anhydride and 1, 2-polybutadiene into a three-neck flask provided with a stirring rod, a condenser pipe and a thermometer, wherein the mass ratio of the reactants is as follows: 33 percent of styrene, 50 percent of maleic anhydride and 17 percent of 1, 2-polybutadiene, introducing argon, heating, gradually raising the temperature to the required reaction temperature of 107 ℃, starting stirring, stopping the reaction after reacting for 6-8 hours, cooling and filtering out precipitates; washing the precipitate in water with surfactant, and drying at 80 deg.C under reduced pressure to obtain product A; then mixing a certain amount of the product A, dicumyl peroxide and polypropylene in a high-speed mixer, and carrying out extrusion granulation to prepare a master batch, wherein the mass ratio of the product A to the polypropylene is as follows: 29% of the product A, 71% of polypropylene, 0.7% of dicumyl peroxide in the total mass of the product A and the polypropylene, and 188 ℃ of reaction temperature to obtain the compatilizer B.
Comparative example 2
Printing wires were produced as in example 2, except that the fiber master batch was not prepared in advance, and after the fiber was directly mixed with polypropylene at a high speed, pellets were prepared by twin screw and further subjected to wire drawing in a single screw wire drawing machine.
Example 3
A preparation method of a bamboo fiber/basalt fiber/polypropylene environment-friendly composite wire comprises the following steps:
s1: placing the homopolymerized polypropylene particles in a blast vacuum oven to dry for 35 hours at 70 ℃, placing the basalt fiber in a blast drying oven to dry for 40 hours at 120 ℃, and placing the bamboo fiber in a blast vacuum oven to dry for 12 hours at 60 ℃;
s2: weighing the homo-polypropylene and the bamboo fiber according to the mass ratio (15%: 15%), mixing in a high-speed mixer, uniformly stirring to obtain a resin mixture, adding the resin mixture into a main feeding bin of a double-screw extruder, wherein the temperature of a feeding section in the double-screw extrusion process is 160-;
s3: weighing the homo-polypropylene and the basalt fiber according to the mass ratio (15%: 15%), mixing in a high-speed mixer, uniformly stirring to obtain a resin mixture, adding the resin mixture into a main feeding bin of a double-screw extruder, wherein the temperature of a feeding section in the double-screw extrusion process is 160-;
s4: weighing the homo-polypropylene/basalt fiber master batch, the homo-polypropylene/bamboo fiber master batch and the compatilizer (7.5%) according to a certain proportion, mixing in a high-speed mixer, uniformly stirring to obtain a mixture, adding the mixture into a main feeding bin of a double-screw extruder, wherein the temperature of a feeding section in the double-screw extrusion process is 160-;
s5: the preparation method comprises the following steps of weighing 20.7 percent of homopolymerized polypropylene, 11 percent of plasticizer and 0.8 percent of antioxidant according to a certain proportion, wherein the plasticizer is a mixture of fatty acid ester and epoxy ester according to the weight ratio of 1:1, mixing in a high-speed mixer, uniformly stirring to obtain a mixture, adding the mixture into a main feeding bin of a double-screw extruder, and carrying out melt extrusion granulation at the temperature of 160-180 ℃ in a feeding section, 190-210 ℃ in a melting section, 195-215 ℃ in a mixing section, 190-210 ℃ in an extrusion section in the double-screw extrusion process;
s6: the obtained granules were subjected to wire drawing molding in a single screw wire drawing machine at a screw rotation speed of 60-85rpm, gradually increased to a set rotation speed from 15rpm at the time of feeding, and at an extruder temperature of 150 ℃, 200 ℃, 210 ℃, 190 ℃ (die head) in this order.
The formula of the polypropylene, the bamboo fiber, the basalt fiber, the antioxidant, the compatilizer and the plasticizer is as follows: 50.7 percent of polypropylene; 15% of bamboo fiber; 15% of basalt fiber; 0.8 percent of antioxidant; 7.5% of a compatilizer; and 11% of plasticizer.
The preparation method of the compatilizer in the step S4 comprises the following steps:
adding weighed toluene, styrene, maleic anhydride and 1, 2-polybutadiene into a three-neck flask provided with a stirring rod, a condenser pipe and a thermometer, wherein the mass ratio of reactants is as follows: 28 percent of styrene,
introducing argon into 40% of maleic anhydride and 32% of 1, 2-polybutadiene, heating, gradually heating to the required reaction temperature of 95 ℃, starting stirring, reacting for 6-8 h, stopping the reaction, cooling, and filtering out precipitates; washing the precipitate in water with surfactant, and drying at 80 deg.C under reduced pressure to obtain product A; then mixing a certain amount of the product A, dicumyl peroxide and polypropylene in a high-speed mixer, and carrying out extrusion granulation to prepare a master batch, wherein the mass ratio of the product A to the polypropylene is as follows: and (3) a product A: 19 percent of polypropylene, 81 percent of polypropylene, the dosage of dicumyl peroxide accounts for 1.8 percent of the total mass of the product A and the polypropylene, and the reaction temperature is 197 ℃ to obtain the compatilizer B.
Comparative example 3
A printing wire was produced in the same manner as in example 3, except that the bamboo fibers, basalt fibers and polypropylene particles were not dried in the step.
Mechanical property tests were performed on the printing wires (1.75 mm wire diameter) prepared in the above examples and comparative examples, and the specific results are shown in table 1.
| Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Tensile strength/MPa | 72.5 | 76.2 | 70.2 | 53.2 | 42.5 | 60.9 |
| Flexural Strength/MPa | 53.9 | 56.0 | 51.5 | 37.4 | 31.9 | 47.6 |
| Impact Strength/KJ/m2 | 12.8 | 13.5 | 12.5 | 9.1 | 6.4 | 9.6 |
TABLE 1
It can be seen from table 1 that the printed wire prepared by the above embodiment has high strength and good mechanical properties; the detection results of the embodiments show that the bamboo fiber/basalt fiber/polypropylene environment-friendly composite wire provided by the invention has the characteristics of high strength, no pollution and high environmental friendliness due to the adoption of green modified materials, namely the bamboo fiber and the basalt fiber.
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. A preparation method of a bamboo fiber/basalt fiber/polypropylene environment-friendly composite wire is characterized by comprising the following steps:
s1: drying the polypropylene particles in a blast vacuum oven at 70 ℃ for 30h-72h, drying the basalt fiber in a blast drying oven at 120 ℃ for 20h-50h, and drying the bamboo fiber in a blast vacuum oven at 60 ℃ for 10-30 h;
s2: weighing polypropylene and bamboo fiber according to the mass ratio of 1:1, mixing in a high-speed mixer, uniformly stirring to obtain a resin mixture, adding the resin mixture into a main feeding bin of a double-screw extruder, wherein the temperature of a feeding section in the double-screw extrusion process is 160-;
s3: weighing polypropylene and basalt fiber according to the mass ratio of 1:1, mixing in a high-speed mixer, uniformly stirring to obtain a resin mixture, adding the resin mixture into a main feeding bin of a double-screw extruder, wherein the temperature of a feeding section in the double-screw extrusion process is 160-;
s4: weighing polypropylene/basalt fiber master batch, polypropylene/bamboo fiber master batch and a compatilizer according to a certain proportion, wherein the compatilizer is PP-g- (styrene-co-maleic anhydride-co-1, 2-polybutadiene), mixing and uniformly stirring in a high-speed mixer to obtain a mixture, sequentially adding the mixture into a main feeding bin of a double-screw extruder, and performing melt extrusion granulation to obtain the polypropylene/bamboo fiber/basalt fiber master batch, wherein the temperature of a feeding section in the double-screw extrusion process is 160-plus 180 ℃, the temperature of a melting section is 190-plus 210 ℃, the temperature of a mixing section is 195-plus 215 ℃, and the temperature of an extrusion section is 190-plus 210 ℃;
s5: weighing polypropylene, polypropylene/bamboo fiber/basalt fiber master batch, plasticizer and antioxidant according to a certain proportion, mixing in a high-speed mixer, uniformly stirring to obtain a mixture, adding the mixture into a main feeding bin of a double-screw extruder, wherein the temperature of a feeding section in the double-screw extrusion process is 160-plus-180 ℃, the temperature of a melting section is 190-plus-210 ℃, the temperature of a mixing section is 195-plus-215 ℃, the temperature of an extrusion section is 190-plus-210 ℃, and performing melt extrusion granulation;
s6: carrying out wire drawing molding on the obtained granules in a single-screw wire drawing machine, wherein the rotating speed of a screw is 60-85rpm, the rotating speed is gradually increased to a set rotating speed from 15rpm during feeding, and the temperature of an extruder is sequentially set to be 150 ℃, 200 ℃, 210 ℃ and 190 ℃;
the formula of the polypropylene, the bamboo fiber, the basalt fiber, the antioxidant, the compatilizer and the plasticizer is as follows: 30-90% of polypropylene, 0-50% of bamboo fiber, 5-50% of basalt fiber, 0-5% of antioxidant, 0-10% of compatilizer and 0-20% of plasticizer;
the preparation method of the compatilizer in the step S4 comprises the following steps:
adding weighed toluene, styrene, maleic anhydride and 1, 2-polybutadiene into a three-neck flask provided with a stirring rod, a condenser pipe and a thermometer, wherein the mass ratio of the reactants is as follows: 10-70% of styrene, 20-60% of maleic anhydride and 0-30% of 1, 2-polybutadiene, introducing argon, heating, gradually heating to the required reaction temperature, wherein the reaction temperature is 70-140 ℃, starting stirring, reacting for 6-8 h, stopping the reaction, cooling, and filtering out precipitates; washing the precipitate in water with surfactant, and drying at 80 deg.C under reduced pressure to obtain product A, wherein A is random copolymer of styrene-maleic anhydride-1, 2-polybutadiene; then mixing a certain amount of the product A, dicumyl peroxide and polypropylene in a high-speed mixer, and carrying out extrusion granulation to prepare a master batch, wherein the mass ratio of the reactants is that the product A is 10-38%, the polypropylene is 62-90%, the dosage of the dicumyl peroxide is 0.1-5% of the total mass of the product A and the polypropylene, the reaction temperature is 170 ℃ and 230 ℃, and a compatilizer B is obtained, wherein the B is PP-g- (styrene-co-maleic anhydride-co-1, 2-polybutadiene).
2. The preparation method of the bamboo fiber/basalt fiber/polypropylene environment-friendly composite wire rod according to claim 1, wherein the formula of the polypropylene, the bamboo fiber, the basalt fiber, the antioxidant, the compatilizer and the plasticizer is as follows: 45% -75% of polypropylene; 5% -20% of bamboo fiber; 10% -25% of basalt fibers; 0.5 to 1.5 percent of antioxidant; 5% -8% of a compatilizer; 3 to 12 percent of plasticizer.
3. The method for preparing the bamboo fiber/basalt fiber/polypropylene environment-friendly composite wire rod as claimed in claim 1, wherein the polypropylene is random polypropylene, homo-polypropylene, co-polypropylene or any one of derived polypropylenes obtained by grafting and co-polymerizing the polypropylene as a matrix resin.
4. The method for preparing the bamboo fiber/basalt fiber/polypropylene environment-friendly composite wire rod as claimed in claim 1, wherein the antioxidant in the step S5 is a mixture of a polyhydric hindered phenol antioxidant and a phosphite antioxidant in a weight ratio of 3: 2.
5. The method for preparing the bamboo fiber/basalt fiber/polypropylene environment-friendly composite wire according to claim 1, wherein the plasticizer in step S5 is one or a mixture of more of a group consisting of a phthalate ester, a fatty acid ester, and an epoxy ester.
6. The method for preparing the bamboo fiber/basalt fiber/polypropylene environment-friendly composite wire according to claim 1 or 6, wherein the plasticizer is a mixture of fatty acid ester and epoxy ester in a weight ratio of 1:1 in step S5.
7. The preparation method of the bamboo fiber/basalt fiber/polypropylene environment-friendly composite wire rod according to claim 1, wherein the raw material ratio of the product A prepared in the preparation process of the compatilizer is as follows: 25 to 50 percent of styrene, 35 to 55 percent of maleic anhydride and 12 to 20 percent of 1, 2-polybutadiene.
8. The method for preparing the bamboo fiber/basalt fiber/polypropylene environment-friendly composite wire rod as claimed in claim 1, wherein the amount of dicumyl peroxide in the product B prepared in the preparation process of the compatilizer is 0.5-2% of the total mass of the product A and the polypropylene.
9. The preparation method of the bamboo fiber/basalt fiber/polypropylene environment-friendly composite wire rod according to claim 1, wherein the raw material ratio of the product B prepared in the preparation process of the compatilizer is as follows: and (3) a product A: 12 to 25 percent of polypropylene and 75 to 88 percent of polypropylene.
10. The method for preparing the bamboo fiber/basalt fiber/polypropylene environment-friendly composite wire rod according to claim 1, wherein a reaction temperature range for preparing the product A in a compatilizer preparation process is 90-110 ℃; the reaction temperature range for the preparation of the product B is 180-200 ℃.
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