CN112480542A - Preparation method of high-filterability polypropylene melt-blown non-woven fabric electret master batch material - Google Patents

Preparation method of high-filterability polypropylene melt-blown non-woven fabric electret master batch material Download PDF

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CN112480542A
CN112480542A CN202011468716.6A CN202011468716A CN112480542A CN 112480542 A CN112480542 A CN 112480542A CN 202011468716 A CN202011468716 A CN 202011468716A CN 112480542 A CN112480542 A CN 112480542A
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polypropylene
nano
master batch
woven fabric
filterability
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蔡雄雄
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Guangdong Jingzhao Engineering Plastic Co ltd
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Guangdong Jingzhao Engineering Plastic Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/20—Compounding polymers with additives, e.g. colouring
    • C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
    • C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/10—Homopolymers or copolymers of propene
    • C08J2323/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/10—Homopolymers or copolymers of propene
    • C08J2423/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/16—Ethene-propene or ethene-propene-diene copolymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2227—Oxides; Hydroxides of metals of aluminium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2296—Oxides; Hydroxides of metals of zinc
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/002—Physical properties
    • C08K2201/003—Additives being defined by their diameter
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/04—Ingredients treated with organic substances
    • C08K9/06—Ingredients treated with organic substances with silicon-containing compounds

Abstract

The invention belongs to the technical field of high polymer materials, and particularly relates to a preparation method of a high-filterability polypropylene melt-blown non-woven fabric electret master batch material. The material is prepared by the following raw materials in parts by weight through melt extrusion granulation: 60-90 parts of polypropylene, 10-40 parts of electret powder, 0.2-0.6 part of antioxidant and 0.2-0.6 part of lubricant, wherein the polypropylene is homo-polypropylene and ZnO modified co-polypropylene in a mass ratio of 1: (1-3). The preparation method is simple and easy to operate, and the non-woven fabric prepared from the master batch has high filterability, small air resistance and good antibacterial performance.

Description

Preparation method of high-filterability polypropylene melt-blown non-woven fabric electret master batch material
Technical Field
The invention belongs to the technical field of high polymer materials, and particularly relates to a preparation method of a high-filterability polypropylene melt-blown non-woven fabric electret master batch material.
Background
Researches show that particles caused by pollution in the air, particularly particles with the aerodynamic equivalent of less than or equal to 0.3 micrometer, have small particle size and are rich in toxic and harmful substances. The particles can stay in the air for a long time and are easily absorbed by people to enter the body, thereby causing diseases such as respiratory system diseases, lung injury, carcinogenesis, cardiovascular diseases, reproductive system, fetal development and the like. Therefore, in the air purification field, there is an increasing emphasis on developing materials that can adsorb these particles. At present, the polymer materials capable of adsorbing the particles after polarization become a research hotspot. The melt-blown polypropylene fiber filter material treated by the electret has the function of adsorbing pollution particles in air due to the surface charge. The melt-blown polypropylene fiber filter material is widely applied to the air purification and medical health industries, such as air conditioner filter screens, medical protective masks, dust masks and the like. However, in the prior art, the electret treatment is directly performed on the melt-blown polypropylene fiber, higher electret voltage (up to 300kV) is required, and the melt-blown polypropylene fiber after the electret treatment has the defects of low filtration efficiency, large resistance and the like.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the preparation method of the polypropylene melt-blown non-woven fabric electret master batch material with high filterability, the preparation method is simple and easy to operate, and the non-woven fabric prepared from the master batch has high filterability, small air resistance and good antibacterial performance.
The purpose of the invention is realized by the following technical scheme: a preparation method of a high-filterability polypropylene melt-blown non-woven fabric electret master batch material is prepared by melt extrusion granulation of the following raw materials in parts by weight: 60-90 parts of polypropylene, 10-40 parts of electret powder, 0.2-0.6 part of antioxidant and 0.2-0.6 part of lubricant, wherein the polypropylene is homo-polypropylene and nano ZnO modified co-polypropylene in a mass ratio of 1: (1-3), adding nano ZnO into 95% ethanol, performing ultrasonic dispersion for 30 min, adding a silane coupling agent into a water-ethanol mixed solution, performing prehydrolysis for 1 h at 60 ℃, dropwise adding the prehydrolysis mixed solution into the ethanol solution in which the nano ZnO is dispersed, performing stirring reaction for 1 h at 75 ℃, performing suction filtration, washing, extracting, and performing vacuum drying to obtain Si-ZnO; (2) and banburying the Si-ZnO and the polypropylene copolymer for 7 min at 170 ℃ and 50 r/min to obtain the nano ZnO modified polypropylene copolymer.
According to the invention, the nano ZnO modified by the silane coupling agent is added into the polypropylene copolymer to prepare the nano ZnO modified polypropylene copolymer, which can effectively kill escherichia coli and staphylococcus aureus, and the nano ZnO is uniformly distributed in the polypropylene copolymer, so that the material has stable properties. Homopolymerized polypropylene and nano ZnO modified copolymerized polypropylene are used according to the mass ratio of 1: the mixture of (1-3) is compounded as a raw material, so that the prepared electret master batch has good uniformity, and the non-woven fabric prepared by the method has good antibacterial property, heat resistance and low-temperature toughness, is easy to degrade and has good environmental protection performance. The non-woven fabric produced by the electret master batch prepared by compounding the electret powder has charges on the surface and can well adsorb pollution particles in air.
The method disclosed by the invention is simple, easy to operate and suitable for large-scale production. The prehydrolyzed mixed solution is dropwise added into the ethanol solution dispersed with the nano ZnO, so that Si in the prepared Si-ZnO is uniformly distributed, and the prepared Si-ZnO has good dispersibility. The Si-ZnO modified polypropylene copolymer is utilized to obtain the nano ZnO modified polypropylene copolymer with good antibacterial performance.
Further, the copolymerized polypropylene in the step (2) is an ethylene-propylene copolymer with an ethylene content of 4%, the weight average molecular weight is more than 50 ten thousand, and the melt index is lower than 0.5g/10 min.
The ethylene-propylene copolymer with 4 percent of ethylene content is adopted in the invention, the weight average molecular weight is more than 50 ten thousand, and the melt index is lower than 0.5g/10min, so that the prepared master batch has good heat resistance and low-temperature toughness and high product purity.
Further, the silane coupling agent in the step (1) is N- (beta-aminoethyl) -gamma-aminopropyltriethoxysilane.
In the invention, N- (beta-aminoethyl) -gamma-aminopropyltriethoxysilane is adopted, so that the content of Si in ZnO is high and the modified ZnO has good dispersibility.
Further, the electret powder is at least one of nano tourmaline, nano alumina, organic fluorine polymer and nano silicon dioxide.
The electret powder can be uniformly and effectively injected into the master batch, so that the prepared master batch can store charges for a long time, has stable chemical properties and has good chemical corrosion resistance. The non-woven fabric prepared by the master batch has the performances of high filtration efficiency and low air resistance.
Further, the electret powder is prepared from nano aluminum oxide and nano silicon dioxide in a weight ratio of 1: the mixture of (1-2).
The invention adopts nano-alumina and nano-silica in a weight ratio of 1: the mixture composed by (1-2) ensures that the prepared master batch has long-term storage charge and stable chemical property.
Further, the nano-alumina is gamma-Al with the particle size of 20nm2O3And beta-Al having a particle diameter of 5nm2O3The mass ratio of (1-3): 1, in a mixture of the components.
The gamma-Al of 20nm adopted by the invention2O3Large specific surface area, rich pore structure, good adsorption property, and 5nm beta-Al2O3By compounding, the filling rate in the master batch is high, the non-woven fabric prepared by the master batch has better adsorption capacity, high filtration efficiency and easy degradation.
Further, the nano silicon dioxide is nano silicon dioxide with the particle size of 2-5nm and nano silicon dioxide with the particle size of 10-15nm, and the mass ratio of the nano silicon dioxide to the nano silicon dioxide is 1: (3-5).
The invention adopts nano silicon dioxide with the grain diameter of 2-5nm and nano silicon dioxide with the grain diameter of 10-15nm according to the mass ratio of 1: and (3) the mixture formed by (3) to (5) is compounded, so that the product has high electret rate and good adsorption capacity.
Further, the antioxidant is at least one of pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], N-octadecyl 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, N' -bis- (3- (35-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine and tris [2, 4-di-tert-butylphenyl ] phosphite.
The antioxidant is adopted, so that the master batch has strong antioxidant capacity and low production cost.
Further, the antioxidant is a mixture of pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], N-octadecyl 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate and N, N' -bis- (3- (35-di-tert-butyl-4-hydroxyphenyl) propionyl) hexamethylenediamine in a mass ratio of 1:1: 1.
The antioxidant with the compounding ratio is adopted, so that the prepared master batch has stable chemical performance and strong corrosion resistance.
Further, the lubricant is at least one of ethylene bis stearamide, pentaerythritol stearate, oleamide and erucamide.
Further, the raw materials are stirred and mixed under the conditions of 1100-.
The master batch material disclosed by the invention is mixed with PP resin (homopolymerized polypropylene PPH, melt index is 1500g/10 min), wherein the weight ratio of the master batch material to the PP resin is 1: 50. After the obtained mixture is melted, the melt is kept at the constant temperature of 250 ℃ in a pipeline at 220 ℃, and is metered by a metering pump and then is sprayed out through a spinneret plate to form the fiber. The fiber is drawn by 220-plus-250 ℃ and lMPa constant-temperature and constant-pressure hot air, and then is rolled after infrared radiation heat treatment, 250kV voltage electret treatment and circulating cooling treatment to obtain the melt-blown non-woven material.
Compared with the prior art, the invention has the advantages that: the preparation method of the high-filterability polypropylene melt-blown non-woven fabric electret master batch material provided by the invention is simple and easy to operate, is suitable for large-scale production, and ensures that the prepared master batch has good adsorption rate, and the non-woven fabric prepared by the master batch has high filtration efficiency and small air resistance.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Example 1
A preparation method of a high-filterability polypropylene melt-blown non-woven fabric electret master batch material is prepared by melt extrusion granulation of the following raw materials in parts by weight: 60 parts of polypropylene, 10 parts of electret powder, 0.2 part of antioxidant and 0.2 part of lubricant, wherein the polypropylene is homopolymerized polypropylene and ZnO modified copolymerized polypropylene in a mass ratio of 1:1, adding nano ZnO into 95% ethanol, performing ultrasonic dispersion for 30 min, adding a silane coupling agent into a water-ethanol mixed solution, performing prehydrolysis for 1 h at 60 ℃, dropwise adding the prehydrolysis mixed solution into the ethanol solution in which the nano ZnO is dispersed, performing stirring reaction for 1 h at 75 ℃, performing suction filtration, washing, extracting, and performing vacuum drying to obtain Si-ZnO; (2) banburying Si-ZnO and polypropylene copolymer at 170 deg.C and 50 r/min for 7 min.
Further, the copolymerized polypropylene in the step (2) is an ethylene-propylene copolymer with an ethylene content of 4%, the weight average molecular weight is more than 50 ten thousand, and the melt index is lower than 0.5g/10 min.
Further, the silane coupling agent in the step (1) is N- (beta-aminoethyl) -gamma-aminopropyltriethoxysilane.
Further, the electret powder is at least one of nano tourmaline, nano alumina, organic fluorine polymer and nano silicon dioxide.
Further, the electret powder is prepared from nano aluminum oxide and nano silicon dioxide in a weight ratio of 1: 1.
Further, the nano-alumina is gamma-Al with the particle size of 20nm2O3And beta-Al having a particle diameter of 5nm2O3The mass ratio of the components is 1:1, in a mixture of the components.
Further, the nano silicon dioxide is nano silicon dioxide with the particle size of 2-5nm and nano silicon dioxide with the particle size of 10-15nm, and the mass ratio of the nano silicon dioxide to the nano silicon dioxide is 1: 3, and (b) a mixture of the components.
Further, the antioxidant is at least one of pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], N-octadecyl 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, N' -bis- (3- (35-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine and tris [2, 4-di-tert-butylphenyl ] phosphite.
Further, the lubricant is at least one of ethylene bis stearamide, pentaerythritol stearate, oleamide and erucamide.
Further, the raw materials are stirred and mixed under the condition of 1100 r/min, and then are put into an extrusion device for mixing, extruding and granulating, wherein the temperature of a melting section during melt blending and extrusion is 180 ℃.
Example 2
A preparation method of a high-filterability polypropylene melt-blown non-woven fabric electret master batch material is prepared by melt extrusion granulation of the following raw materials in parts by weight: 70 parts of polypropylene, 20 parts of electret powder, 0.4 part of antioxidant and 0.4 part of lubricant, wherein the polypropylene is homopolymerized polypropylene and ZnO modified copolymerized polypropylene in a mass ratio of 1:1, adding nano ZnO into 95% ethanol, performing ultrasonic dispersion for 30 min, adding a silane coupling agent into a water-ethanol mixed solution, performing prehydrolysis for 1 h at 60 ℃, dropwise adding the prehydrolysis mixed solution into the ethanol solution in which the nano ZnO is dispersed, performing stirring reaction for 1 h at 75 ℃, performing suction filtration, washing, extracting, and performing vacuum drying to obtain Si-ZnO; (2) banburying Si-ZnO and polypropylene copolymer at 170 deg.C and 50 r/min for 7 min.
Further, the copolymerized polypropylene in the step (2) is an ethylene-propylene copolymer with an ethylene content of 4%, the weight average molecular weight is more than 50 ten thousand, and the melt index is lower than 0.5g/10 min.
Further, the silane coupling agent in the step (1) is N- (beta-aminoethyl) -gamma-aminopropyltriethoxysilane.
Further, the electret powder is at least one of nano tourmaline, nano alumina, organic fluorine polymer and nano silicon dioxide.
Further, the electret powder is prepared from nano aluminum oxide and nano silicon dioxide in a weight ratio of 1: the mixture of (1-2).
Further, the nano-alumina is gamma-Al with the particle size of 20nm2O3And beta-Al having a particle diameter of 5nm2O3The mass ratio of the components is 1:1, in a mixture of the components.
Further, the nano silicon dioxide is nano silicon dioxide with the particle size of 2-5nm and nano silicon dioxide with the particle size of 10-15nm, and the mass ratio of the nano silicon dioxide to the nano silicon dioxide is 1: 3, and (b) a mixture of the components.
Further, the antioxidant is at least one of pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], N-octadecyl 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, N' -bis- (3- (35-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine and tris [2, 4-di-tert-butylphenyl ] phosphite.
Further, the lubricant is at least one of ethylene bis stearamide, pentaerythritol stearate, oleamide and erucamide.
Further, the raw materials are stirred and mixed under the condition of 1100 r/min, and then are put into an extrusion device for mixing, extruding and granulating, wherein the temperature of a melting section during melt blending and extrusion is 180 ℃.
Example 3
A preparation method of a high-filterability polypropylene melt-blown non-woven fabric electret master batch material is prepared by melt extrusion granulation of the following raw materials in parts by weight: 90 parts of polypropylene, 40 parts of electret powder, 0.6 part of antioxidant and 0.6 part of lubricant, wherein the polypropylene is homopolymerized polypropylene and ZnO modified copolymerized polypropylene in a mass ratio of 1: 3, adding nano ZnO into 95% ethanol, performing ultrasonic dispersion for 30 min, adding a silane coupling agent into a water-ethanol mixed solution, performing prehydrolysis for 1 h at 60 ℃, dropwise adding the prehydrolysis mixed solution into the ethanol solution in which the nano ZnO is dispersed, performing stirring reaction for 1 h at 75 ℃, performing suction filtration, washing, extracting, and performing vacuum drying to obtain Si-ZnO; (2) banburying Si-ZnO and polypropylene copolymer at 170 deg.C and 50 r/min for 7 min.
Further, the copolymerized polypropylene in the step (2) is an ethylene-propylene copolymer with an ethylene content of 4%, the weight average molecular weight is more than 50 ten thousand, and the melt index is lower than 0.5g/10 min.
Further, the silane coupling agent in the step (1) is N- (beta-aminoethyl) -gamma-aminopropyltriethoxysilane.
Further, the electret powder is at least one of nano tourmaline, nano alumina, organic fluorine polymer and nano silicon dioxide.
Further, the electret powder is prepared from nano aluminum oxide and nano silicon dioxide in a weight ratio of 1: 1.
Further, the nano-alumina is gamma-Al with the particle size of 20nm2O3And beta-Al having a particle diameter of 5nm2O3The mass ratio of the components is 1:1, in a mixture of the components.
Further, the nano silicon dioxide is nano silicon dioxide with the particle size of 2-5nm and nano silicon dioxide with the particle size of 10-15nm, and the mass ratio of the nano silicon dioxide to the nano silicon dioxide is 1: 3, and (b) a mixture of the components.
Further, the antioxidant is at least one of pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], N-octadecyl 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, N' -bis- (3- (35-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine and tris [2, 4-di-tert-butylphenyl ] phosphite.
Further, the lubricant is at least one of ethylene bis stearamide, pentaerythritol stearate, oleamide and erucamide.
Further, the raw materials are stirred and mixed under the condition of 1100 r/min, and then are put into an extrusion device for mixing, extruding and granulating, wherein the temperature of a melting section during melt blending and extrusion is 180 ℃.
Example 4
A preparation method of a high-filterability polypropylene melt-blown non-woven fabric electret master batch material is prepared by melt extrusion granulation of the following raw materials in parts by weight: 90 parts of polypropylene, 40 parts of electret powder, 0.6 part of antioxidant and 0.6 part of lubricant, wherein the polypropylene is homopolymerized polypropylene and ZnO modified copolymerized polypropylene in a mass ratio of 1:1, adding nano ZnO into 95% ethanol, performing ultrasonic dispersion for 30 min, adding a silane coupling agent into a water-ethanol mixed solution, performing prehydrolysis for 1 h at 60 ℃, dropwise adding the prehydrolysis mixed solution into the ethanol solution in which the nano ZnO is dispersed, performing stirring reaction for 1 h at 75 ℃, performing suction filtration, washing, extracting, and performing vacuum drying to obtain Si-ZnO; (2) banburying Si-ZnO and polypropylene copolymer at 170 deg.C and 50 r/min for 7 min.
Further, the copolymerized polypropylene in the step (2) is an ethylene-propylene copolymer with an ethylene content of 4%, the weight average molecular weight is more than 50 ten thousand, and the melt index is lower than 0.5g/10 min.
Further, the silane coupling agent in the step (1) is N- (beta-aminoethyl) -gamma-aminopropyltriethoxysilane.
Further, the electret powder is at least one of nano tourmaline, nano alumina, organic fluorine polymer and nano silicon dioxide.
Further, the electret powder is prepared from nano aluminum oxide and nano silicon dioxide in a weight ratio of 1: 1.
Further, the nano-alumina is gamma-Al with the particle size of 20nm2O3And beta-Al having a particle diameter of 5nm2O3The mass ratio of 3: 1, in a mixture of the components.
Further, the nano silicon dioxide is nano silicon dioxide with the particle size of 2-5nm and nano silicon dioxide with the particle size of 10-15nm, and the mass ratio of the nano silicon dioxide to the nano silicon dioxide is 1: 3, and (b) a mixture of the components.
Further, the antioxidant is at least one of pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], N-octadecyl 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, N' -bis- (3- (35-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine and tris [2, 4-di-tert-butylphenyl ] phosphite.
Further, the lubricant is at least one of ethylene bis stearamide, pentaerythritol stearate, oleamide and erucamide.
Further, the raw materials are stirred and mixed under the condition of 1100 r/min, and then are put into an extrusion device for mixing, extruding and granulating, wherein the temperature of a melting section during melt blending and extrusion is 180 ℃.
Example 5
A preparation method of a high-filterability polypropylene melt-blown non-woven fabric electret master batch material is prepared by melt extrusion granulation of the following raw materials in parts by weight: 90 parts of polypropylene, 40 parts of electret powder, 0.6 part of antioxidant and 0.6 part of lubricant, wherein the polypropylene is homopolymerized polypropylene and ZnO modified copolymerized polypropylene in a mass ratio of 1:1, adding nano ZnO into 95% ethanol, performing ultrasonic dispersion for 30 min, adding a silane coupling agent into a water-ethanol mixed solution, performing prehydrolysis for 1 h at 60 ℃, dropwise adding the prehydrolysis mixed solution into the ethanol solution in which the nano ZnO is dispersed, performing stirring reaction for 1 h at 75 ℃, performing suction filtration, washing, extracting, and performing vacuum drying to obtain Si-ZnO; (2) banburying Si-ZnO and polypropylene copolymer at 170 deg.C and 50 r/min for 7 min.
Further, the copolymerized polypropylene in the step (2) is an ethylene-propylene copolymer with an ethylene content of 4%, the weight average molecular weight is more than 50 ten thousand, and the melt index is lower than 0.5g/10 min.
Further, the silane coupling agent in the step (1) is N- (beta-aminoethyl) -gamma-aminopropyltriethoxysilane.
Further, the electret powder is at least one of nano tourmaline, nano alumina, organic fluorine polymer and nano silicon dioxide.
Further, the electret powder is prepared from nano aluminum oxide and nano silicon dioxide in a weight ratio of 1: 3 in a mixture of two or more.
Further, the nano-alumina is gamma-Al with the particle size of 20nm2O3And beta-Al having a particle diameter of 5nm2O3The mass ratio of 3: 1, in a mixture of the components.
Further, the nano silicon dioxide is nano silicon dioxide with the particle size of 2-5nm and nano silicon dioxide with the particle size of 10-15nm, and the mass ratio of the nano silicon dioxide to the nano silicon dioxide is 1:5, and (c) a mixture of the components.
Further, the antioxidant is at least one of pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], N-octadecyl 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, N' -bis- (3- (35-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine and tris [2, 4-di-tert-butylphenyl ] phosphite.
Further, the lubricant is at least one of ethylene bis stearamide, pentaerythritol stearate, oleamide and erucamide.
Further, the raw materials are stirred and mixed under the condition of 1100 r/min, and then are put into an extrusion device for mixing, extruding and granulating, wherein the temperature of a melting section during melt blending and extrusion is 180 ℃.
The masterbatch materials of examples 1 to 5 were mixed with PP resin (homo-polypropylene PPH, melt index 1500g/10 min) at a weight ratio of 1: 50. After the obtained mixture is melted, the melt is kept at the constant temperature of 250 ℃ in a pipeline, and is metered by a metering pump and then is sprayed out through a spinneret plate to form the fiber. And (3) drawing the fibers by hot air at the constant temperature and constant pressure of 250 ℃ and under the action of lMPa, carrying out infrared radiation heat treatment, carrying out 250kV voltage electret treatment and circulating cooling treatment, and then rolling to obtain the melt-blown non-woven material. The nonwoven material was subjected to performance tests, the test results are shown in table 1.
Wherein, the medium adopts NaCl particles with the number median diameter of 0.080 +/-0 and 02wn, the testing flow is 85L/min, and the filtering efficiency and the resistance are tested. The sterilization efficiency adopts escherichia coli and staphylococcus aureus strains.
TABLE 1
Experimental Material Filtration efficiency/%) resistance/Pa The sterilization efficiency%
Example 1 96.5 125 99
Example 2 95.1 104 99
Example 3 97.6 120 99
Example 4 96.7 97 99
Example 5 98.5 104 99
The test data shows that the electret powder and other modification aids added into the high-filterability polypropylene melt-blown non-woven fabric electret master batch material can be uniformly dispersed in PP (polypropylene) during melt blending, so that the prepared material has good filtering and adsorbing properties and sterilizing properties. The PP electret master batch material which is prepared by blending polypropylene (PP) serving as a base material and can be used for polypropylene melt-blown non-woven fabrics widens the application field of PP on the basis of ensuring excellent filtering performance, and has good application prospect and economic benefit.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.

Claims (10)

1. The preparation method of the high-filterability polypropylene melt-blown non-woven fabric electret master batch material is characterized by being prepared by melt extrusion granulation of the following raw materials in parts by weight: 60-90 parts of polypropylene, 10-40 parts of electret powder, 0.2-0.6 part of antioxidant and 0.2-0.6 part of lubricant, wherein the polypropylene is homo-polypropylene and ZnO modified co-polypropylene in a mass ratio of 1: (1-3), adding nano ZnO into 95% ethanol, performing ultrasonic dispersion for 30 min, adding a silane coupling agent into a water-ethanol mixed solution, performing prehydrolysis for 1 h at 60 ℃, dropwise adding the prehydrolysis mixed solution into the ethanol solution in which the nano ZnO is dispersed, performing stirring reaction for 1 h at 75 ℃, performing suction filtration, washing, extracting, and performing vacuum drying to obtain Si-ZnO; (2) banburying Si-ZnO and polypropylene copolymer at 170 deg.C and 50 r/min for 7 min.
2. The method for preparing the polypropylene melt-blown non-woven fabric electret master batch material with high filterability according to claim 1, wherein the polypropylene copolymer in the step (2) is an ethylene-propylene copolymer with 4% of ethylene content, the weight average molecular weight is more than 50 ten thousand, and the melt index is lower than 0.5g/10 min.
3. The method for preparing the polypropylene melt-blown non-woven fabric electret master batch material with high filterability according to claim 2, wherein the silane coupling agent in the step (1) is N- (beta-aminoethyl) -gamma-aminopropyltriethoxysilane.
4. The preparation method of the polypropylene melt-blown non-woven fabric electret master batch material with high filterability according to claim 3, wherein the electret powder is at least one of nano tourmaline, nano aluminum oxide, organic fluoropolymer and nano silicon dioxide.
5. The preparation method of the high-filterability polypropylene melt-blown non-woven fabric electret master batch material according to claim 4, wherein the electret powder is nano-alumina and nano-silica, and the weight ratio of the nano-alumina to the nano-silica is 1: the mixture of (1-2).
6. The method for preparing the polypropylene melt-blown non-woven fabric electret master batch material with high filterability according to claim 5, wherein the nano-alumina is gamma-Al with the particle size of 20nm2O3And beta-Al having a particle diameter of 5nm2O3The mass ratio of (1-3): 1, in a mixture of the components.
7. The preparation method of the high-filterability polypropylene melt-blown non-woven fabric electret master batch material according to claim 6, wherein the nano-silica is nano-silica with a particle size of 2-5nm and nano-silica with a particle size of 10-15nm in a mass ratio of 1: (3-5).
8. The method for preparing the polypropylene melt-blown non-woven fabric electret master batch material with high filterability of claim 7, wherein the antioxidant is at least one of pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], N-octadecyl 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, N' -bis- (3- (35-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine, and tris [2, 4-di-tert-butylphenyl ] phosphite.
9. The method for preparing the high-filterability polypropylene melt-blown non-woven fabric electret master batch material according to claim 8, wherein the lubricant is at least one of ethylene bis stearamide, pentaerythritol stearate, oleamide and erucamide.
10. The method for preparing the electret master batch material of polypropylene melt-blown non-woven fabric with high filterability as claimed in claim 9, wherein the raw materials are stirred and mixed under the conditions of 1100-1400 rpm, and then are put into an extrusion device for mixing, extrusion and granulation, and the temperature of the melting section during melt blending extrusion is 180-240 ℃.
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CN113980392A (en) * 2021-12-09 2022-01-28 西南石油大学 Electret master batch for melt-blown fabric and preparation method thereof
CN115707804A (en) * 2021-08-19 2023-02-21 联泓(江苏)新材料研究院有限公司 Compound polypropylene electret material and preparation method and application thereof
CN116144108A (en) * 2023-02-10 2023-05-23 杭州福斯特应用材料股份有限公司 Nano modified smooth master batch and preparation method and application thereof

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