CN114507388B - High-wear-resistance barrier moisture-permeable material and preparation method and application thereof - Google Patents

High-wear-resistance barrier moisture-permeable material and preparation method and application thereof Download PDF

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CN114507388B
CN114507388B CN202210207423.5A CN202210207423A CN114507388B CN 114507388 B CN114507388 B CN 114507388B CN 202210207423 A CN202210207423 A CN 202210207423A CN 114507388 B CN114507388 B CN 114507388B
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moisture
resistant
parts
weight
uhmwpe
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CN114507388A (en
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李振华
杨友强
丁超
陈平绪
张龙飞
魏金刚
杨方强
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Guangdong Kingfa Science and Technology Co Ltd
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Guangdong Kingfa Science and Technology 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
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/02—Layered materials
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A41D31/12—Hygroscopic; Water retaining
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A41D31/24—Resistant to mechanical stress, e.g. pierce-proof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D2500/00—Materials for garments
    • A41D2500/30—Non-woven
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D2500/00—Materials for garments
    • A41D2500/50—Synthetic resins or rubbers
    • A41D2500/52—Synthetic resins or rubbers in sheet form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/554—Wear resistance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7246—Water vapor barrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2437/00—Clothing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2571/00—Protective equipment
    • 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
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • 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
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/06—Polyethene
    • 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
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • C08K3/041—Carbon nanotubes
    • 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

Abstract

The invention discloses a high-wear-resistance barrier moisture-permeable material, a preparation method and application thereof, and belongs to the technical field of protective materials. The high wear-resistant barrier moisture-permeable material comprises the following components in parts by weight: 65-80 parts of HDPE, 5-20 parts of UHMWPE and 0.2-1 part of carbon nano tube, wherein the weight average molecular weight Mw of the HDPE is less than or equal to 30 ten thousand, and the weight average molecular weight Mw of the UHMWPE is 50 ten thousand-100 ten thousand. According to the invention, PE is optimally selected to obtain the material with excellent film forming property, wear resistance and barrier property. The invention also introduces the carbon nano tube into the PE material, thereby effectively improving the moisture permeability of the material.

Description

High-wear-resistance barrier moisture-permeable material and preparation method and application thereof
Technical Field
The invention belongs to the technical field of protective materials, and particularly relates to a high-wear-resistance barrier moisture-permeable material, and a preparation method and application thereof.
Background
In order to achieve a good virus-blocking effect, the material used for manufacturing the protective clothing needs to have excellent sealability, but the excellent sealability can cause the gas and sweat discharged from the body of the wearer to be difficult to be discharged, and particularly, the existence of sweat can greatly influence the wearing comfort of the protective clothing, so that the protective clothing needs to have good moisture permeability while ensuring good barrier performance.
The prior art CN 111690195A discloses a nano microporous membrane, a manufacturing method of the nano microporous membrane and application thereof, wherein polyolefin with certain molecular weight and a processing aid are mixed according to a certain proportion, so that the compounded material meets specific strength requirements, under the action of intermolecular acting force and additives, the aperture of a microporous structure formed by stretching a polyolefin casting base membrane is greatly reduced, the aperture can reach the nano level, the effect of 100% protection can be realized, and meanwhile, the thickness of the microporous membrane can be thinned, so that the mask material is more comfortable to wear. However, the material obtained by the method cannot be applied to the fields of protective clothing and outdoor labor insurance, and the main reason is that the PE film is poor in wear resistance and unsuitable for exposure to an operating environment. For this reason, it is desired to provide a material having excellent abrasion resistance, barrier property and moisture permeability at the same time.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a high-wear-resistance barrier moisture-permeable material, and a preparation method and application thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the high wear-resistant moisture-proof material comprises the following components in parts by weight: 65-80 parts of HDPE (high-density polyethylene), 5-20 parts of UHMWPE (ultra high molecular weight polyethylene) and 0.2-1 part of carbon nano tube, wherein the weight average molecular weight Mw of the HDPE is less than or equal to 30 ten thousand, and the weight average molecular weight Mw of the UHMWPE is 50 ten thousand-100 ten thousand.
The invention adopts HDPE with the weight average molecular weight Mw less than or equal to 30 ten thousand as matrix resin, and the HDPE with the molecular weight has better film forming property, but has poorer wear resistance and no moisture permeability. Therefore, the invention adopts UHMWPE with the weight average molecular weight Mw of 50-100 ten thousand to modify HDPE, and the UHMWPE with the molecular weight can effectively improve the wear resistance of HDPE without affecting the film forming property. And secondly, a proper amount of carbon nanotubes are introduced into the system, so that the film forming property of the material is not influenced, the material is endowed with good moisture permeability, and the mechanical property of the material is improved.
The inventor finds that if HDPE with Mw of more than 30 ten thousand is adopted in the formula system, the film forming property of the material is poor, and the film is difficult to process and prepare. If UHMWPE with Mw less than 50 ten thousand is adopted in the formula system, the wear resistance of the material cannot be effectively improved. If UHMWPE with Mw of more than 100 ten thousand is adopted in the formula system, the film forming property of the material is obviously reduced, and the film is difficult to process and prepare.
More preferably, the HDPE has a weight average molecular weight Mw of 10 to 26 tens of thousands. The HDPE with the molecular weight has better film forming property and higher film quality.
Preferably, the UHMWPE is 10-15 parts by weight.
Preferably, the carbon nanotubes are 0.4 to 0.8 parts by weight.
Preferably, the carbon nanotubes are at least one of single-walled carbon nanotubes and multi-walled carbon nanotubes.
Preferably, the carbon nanotubes are pre-dispersed with a polar solvent and a fatty acid prior to addition.
Preferably, the polar solvent is at least one of ethyl acetate, DMF (N, N-dimethylformamide), ethanol, and water.
Preferably, the fatty acid is at least one of lauric acid, myristic acid, palmitic acid, coconut oil fatty acid diethanolamide.
Preferably, the weight ratio of the carbon nano tube to the polar solvent to the fatty acid is (75-85) and the weight ratio of the carbon nano tube to the polar solvent to the fatty acid= (15-25) to (0.5-1.5).
Preferably, the high wear-resistant and moisture-permeable barrier material further comprises the following components in parts by weight: 10 to 20 parts of processing aid, 0.1 to 0.5 part of antioxidant and 0.5 to 1.5 parts of lubricant.
Preferably, the processing aid is at least one of erucamide, oleamide, 10# white oil and paraffin oil.
Preferably, the antioxidant is at least one of pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, tris (2, 4-di-tert-butylphenyl) phosphite, 1,3, 5-tris (4-tert-butyl-3-hydroxy-2, 6-dimethylbenzyl) -1,3, 5-triazine-2, 4,6- (1H, 3H, 5H) -trione, pentaerythritol tetrakis (3-laurylthiopropionate).
Preferably, the lubricant is at least one of EBS amide, PE wax, stearate.
The invention also provides a preparation method of the high wear-resistant barrier moisture-permeable material, which comprises the following steps:
(1) Uniformly mixing the carbon nano tube, the polar solvent and the fatty acid to obtain a carbon nano tube mixture;
(2) According to the formula proportion, uniformly mixing HDPE, UHMWPE, a processing aid, an antioxidant and a lubricant to obtain a premix;
(3) Adding the premix into a double screw extruder for melt extrusion, injecting the carbon nano tube mixture prepared in the step (1) into a melting section, wherein the temperature of each area of the screw is 190-230 ℃, extracting volatile components in two sections of vacuum, controlling the vacuum pressure below-0.06 MPa, and carrying out vacuum granulation to obtain the high wear-resistant barrier moisture-permeable material.
The invention also provides application of the high wear-resistant barrier moisture-permeable material in preparing protective materials.
The invention also provides a protective material which is prepared from the high-wear-resistance barrier moisture-permeable material.
The invention also provides a preparation method of the protective material, which comprises the following steps:
(1) Adding the granular high wear-resistant barrier moisture-permeable material into a hopper of a casting device, setting the temperature of each extrusion section to 170-230 ℃, setting the temperature of a die head to 170-250 ℃, and casting to form a film;
(2) And (3) compounding the membrane material prepared in the step (1) with non-woven fabrics to prepare the medical protective material.
The compounding of the membrane material and the non-woven fabric can be realized by adopting the prior methods such as hot melt adhesive spraying adhesive bonding and the like.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, through optimizing and selecting the types, molecular weights and proportions of PE, the material with excellent film forming property, wear resistance and barrier property is obtained. Meanwhile, the diffusion rate of water molecules of the nano-scale micropores of the carbon nano-tube is one order of magnitude higher than the diffusion rate depending on concentration difference diffusion, and the carbon nano-tube is introduced into the PE material, so that the moisture permeability of the material is effectively improved while the film forming property, the wear resistance and the barrier property of the material are not reduced. In addition, the invention effectively solves the technical problem that the carbon nano tube is difficult to disperse by firstly preparing the carbon nano tube into the oily carbon nano tube mixture and then introducing the oily carbon nano tube mixture into the material by adopting an injection type processing method. The high wear-resistant moisture-proof material can effectively resist bacteria and viruses, has good wear resistance and moisture permeability, can be made into medical protection products such as protection tools or protective clothing and the like, and has wide application prospect in protection places such as labor protection, outdoor protection and the like.
Detailed Description
The technical solution of the present invention will be further described with reference to the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. The processing aid, antioxidant and lubricant were the same in parallel experiments.
The raw material sources used in examples and comparative examples are described below, but are not limited thereto:
HDPE-1 has a weight average molecular weight Mw of 8 ten thousand, model HDPE 2911, available from Zhongpetrochemical industry.
HDPE-2 has a weight average molecular weight Mw of 10 ten thousand, model HTA108, available from Exxon Mobil.
HDPE-3 has a weight average molecular weight Mw of 26 ten thousand, model HDPE 5502, available from Korea Dalin.
HDPE-4 has a weight average molecular weight Mw of 30 ten thousand, model BH500, available from Asahi chemical.
HDPE-5 has a weight average molecular weight Mw of 40 ten thousand, model T0504F, purchased from Zhongpetrifaction.
UHMWPE-1 has a weight average molecular weight Mw of 50 ten thousand, model T0604F, purchased from medium petrifaction.
UHMWPE-2 has a weight average molecular weight Mw of 100 ten thousand, model UH650, available from Asahi chemical.
UHMWPE-3 has a weight average molecular weight Mw of 45 ten thousand, model 060F, available from Zhongpetrifaction.
UHMWPE-4 has a weight average molecular weight Mw of 120 ten thousand, model 4500, available from Yangzi petrochemical industry.
Processing aids, erucamide, are commercially available.
Carbon nanotubes, CNT102, island gold technology, multiwall carbon nanotubes.
Antioxidants, hindered phenolic antioxidants 1010, commercially available.
Lubricants, EBS amides, are commercially available.
The performance test criteria and conditions for the films prepared in the examples and comparative examples are as follows:
1. moisture permeability was tested by reference to GB/T19082-2009 standard, 38 ℃,90% RH. The larger the moisture permeability, the better the moisture permeability of the material.
2. Hydrostatic pressure was tested against EN ISO 811:2018 standard, boost rate 60cmH 2 O. The greater the hydrostatic pressure, the better the barrier properties of the material.
3. The abrasion resistance is tested according to EN ISO 12947-2:2016 standard, a Martindale abrasion tester is adopted, the test pressure is 9kPa, the abrasive 240 abrasion test abrasive paper is used, the 1-6-level rotational speed grades are respectively 10 revolutions, 40 revolutions, 100 revolutions, 400 revolutions, 1000 revolutions and 2000 revolutions, the hydrostatic pressure is tested according to the method after the abrasion treatment of the abrasion tester, and the hydrostatic pressure is greater than 20cmH 2 O represents passing the rating. The higher the wear resistance rating, the better the wear resistance of the material.
Examples 1 to 13
Examples 1-13 provide a high wear-resistant barrier moisture-permeable material, the formula of which in parts by weight is shown in table 1, and the preparation method is as follows:
(1) Mixing carbon nano tubes, ethanol and lauric acid according to the weight ratio of the carbon nano tubes to the ethanol to the lauric acid=20:1:80, and uniformly stirring at 40 ℃ to obtain an oily carbon nano tube mixture;
(2) Adding HDPE, UHMWPE, a processing aid, an antioxidant and a lubricant into a high-speed mixer, and mixing at 1000-2000 rpm for 1-3 min to obtain uniform premix;
(3) Adding the premix into a double screw extruder for melt extrusion, injecting the carbon nano tube mixture prepared in the step (1) into a melting section, wherein the temperature of each region of the screw is 190-230 ℃, extracting small molecular substances in two sections of vacuum, controlling the vacuum pressure below-0.06 MPa, and carrying out vacuum granulation to obtain the high wear-resistant barrier moisture permeable material.
The prepared high wear-resistant and moisture-permeable barrier material is added into a hopper of a casting device, the temperature of each extrusion section is set to 170-230 ℃, the temperature of a die head is set to 170-250 ℃, a film with the thickness of 0.015mm is produced, and the performance test of moisture permeability, wear resistance and initial hydrostatic pressure is carried out by sampling.
TABLE 1
Note that: in the table "-" indicates that the component was not added, and the same applies.
The initial hydrostatic pressure refers to the hydrostatic pressure of a film sample that has not been subjected to the abrasion resistance test.
Comparative examples 1 to 11
Comparative examples 1 to 11 provide PE materials whose formulations (parts by weight) are shown in Table 2. The preparation methods of comparative examples 1 to 6 and comparative examples 8 to 11 are described with reference to the preparation methods of examples 1 to 13.
The preparation method of comparative example 7 is as follows: (1) Adding HDPE, UHMWPE, carbon nano tube, processing aid, antioxidant and lubricant into a high-speed mixer, mixing at 1000-2000 rpm for 1-3 min to obtain uniform premix; (2) Adding the premix into a double-screw extruder for melt extrusion, wherein the temperature of each region of the screw is 190-230 ℃, small molecular substances are extracted in two sections of vacuum, the vacuum pressure is controlled below-0.06 MPa, and vacuum granulation is carried out; (3) And adding the prepared granules into a hopper of a casting device, extruding each section at 170-230 ℃, setting the die head at 170-250 ℃, producing a film with the thickness of 0.015mm, and sampling for performance testing of moisture permeability, abrasion resistance and initial hydrostatic pressure.
TABLE 2
From the above table data, it can be seen that: the moisture permeability of the materials of examples 1 to 13 was 7124g/m 2 The abrasion resistance grade reaches more than 4 grades and the initial hydrostatic pressure reaches 197mmH after more than 24 hours 2 Above O, the coating has better moisture permeability, wear resistance and barrier property. It is seen from examples 1 and examples 5 to 7 that the UHMWPE content affects the properties of the material, whereas the combination properties of the material in terms of moisture permeability, abrasion resistance and barrier properties are better when the UHMWPE content is 10 to 15 parts by weight (i.e. examples 5 to 6). It is also seen from comparative examples 10 to 11 that when UHMWPE is added too little, the abrasion resistance of the material is insufficient, only grade 3 is achieved, and the moisture permeability and barrier properties are reduced. When the UHMWPE is excessively added, although the abrasion resistance of the material may reach 6 grades, the moisture permeability and barrier property of the material are reduced at this time. It can be seen from examples 1 and examples 8 to 10 that the content of carbon nanotubes also affects the properties of the material, which has better moisture permeability, abrasion resistance and barrier properties when added according to the formulation of the present invention. It is also seen from comparative examples 8 and 9 that when the carbon nanotubes are added too little or too much, the moisture permeability and barrier properties of the material are significantly lowered, and when the carbon nanotubes are added too little, the abrasion resistance is also affected.
As can be seen from comparative example 1, when HDPE-5 having a weight average molecular weight of more than 30 ten thousand is used, the film forming property of the material is poor at this time, resulting in a significant decrease in the moisture permeability, abrasion resistance and barrier property of the film. As can be seen from comparative example 2, the use of UHMWPE-3 having a weight average molecular weight of less than 50 ten thousand results in a material having significantly reduced wear resistance, and also reduced moisture permeability and barrier properties. As can be seen from comparative example 3, when UHMWPE-4 having a weight average molecular weight of more than 100 ten thousand is used, the film forming property of the material is poor, resulting in a significant decrease in the moisture permeability, abrasion resistance and barrier property of the film. As can be seen from comparative example 4, a PE (HDPE) material is used, which does not have abrasion resistance and is poor in moisture permeability and barrier properties. As can be seen from comparative example 5, a PE (UHMWPE) material was used to make the material, which had poor moisture permeability and decreased barrier properties. As can be seen from comparative example 6, the material lacks a mixture of carbon nanotubes, which has no moisture permeability and has reduced barrier and abrasion resistance. As can be seen from comparative example 7, when the carbon nanotubes were directly added to the formulation system without treatment, the dispersion effect of the carbon nanotubes was poor, resulting in poor moisture permeability, abrasion resistance and barrier property of the film.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted equally without departing from the spirit and scope of the technical solution of the present invention.

Claims (9)

1. The high wear-resistant moisture-proof material is characterized by comprising the following components in parts by weight: 65-80 parts of HDPE, 5-20 parts of UHMWPE and 0.2-1 part of carbon nano tube, wherein the weight average molecular weight Mw of the HDPE is less than or equal to 30 ten thousand, and the weight average molecular weight Mw of the UHMWPE is 50 ten thousand-100 ten thousand; the carbon nanotubes are pre-dispersed with a polar solvent and a fatty acid prior to addition.
2. The highly abrasion-resistant moisture-barrier material according to claim 1, wherein the HDPE has a weight average molecular weight Mw of 10 to 26 tens of thousands.
3. The highly abrasion-resistant moisture-permeable barrier material according to claim 1, wherein the weight part of UHMWPE is 10 to 15 parts.
4. The highly abrasion-resistant moisture-permeable barrier material according to claim 1, wherein the carbon nanotubes are 0.4 to 0.8 parts by weight.
5. The highly abrasion-resistant moisture-permeable barrier material according to claim 1, wherein the polar solvent is at least one of ethyl acetate, DMF, ethanol, water; the fatty acid is at least one of lauric acid, myristic acid, palmitic acid and coconut oil fatty acid diethanolamide.
6. The highly abrasion-resistant moisture-resistant material according to claim 1, wherein the weight ratio of the carbon nanotubes to the polar solvent to the fatty acid is carbon nanotubes to polar solvent to fatty acid= (15 to 25): (0.5 to 1.5): (75 to 85).
7. The highly abrasion-resistant moisture-resistant material according to claim 1, further comprising the following components in parts by weight: 10-20 parts of processing aid, 0.1-0.5 part of antioxidant and 0.5-1.5 parts of lubricant, wherein the processing aid is at least one of erucamide, oleamide, 10# white oil and paraffin oil, the antioxidant is at least one of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, tri (2, 4-di-tert-butylphenyl) phosphite ester, 1,3, 5-tri (4-tert-butyl-3-hydroxy-2, 6-dimethylbenzyl) -1,3, 5-triazine-2, 4,6- (1H, 3H, 5H) -trione and pentaerythritol tetra (3-laurylthiopropionate), and the lubricant is at least one of EBS amide, PE wax and stearate.
8. The method for producing a highly abrasion-resistant barrier moisture-permeable material according to any one of claims 1 to 7, comprising the steps of:
(1) Uniformly mixing the carbon nano tube, the polar solvent and the fatty acid to obtain a carbon nano tube mixture;
(2) According to the formula proportion, uniformly mixing HDPE, UHMWPE, a processing aid, an antioxidant and a lubricant to obtain a premix;
(3) Adding the premix into a double screw extruder for melt extrusion, injecting the carbon nano tube mixture prepared in the step (1) into a melting section, wherein the temperature of each area of the screw is 190-230 ℃, extracting volatile components in two sections of vacuum, controlling the vacuum pressure below-0.06 MPa, and carrying out vacuum granulation to obtain the high wear-resistant barrier moisture-permeable material.
9. A protective material, characterized in that it is produced by using a material comprising a high abrasion-resistant barrier moisture-permeable material according to any one of claims 1 to 7.
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