CN110684262B - Preparation method of wear-resistant scratch-resistant composite material - Google Patents
Preparation method of wear-resistant scratch-resistant composite material Download PDFInfo
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- CN110684262B CN110684262B CN201910969429.4A CN201910969429A CN110684262B CN 110684262 B CN110684262 B CN 110684262B CN 201910969429 A CN201910969429 A CN 201910969429A CN 110684262 B CN110684262 B CN 110684262B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- 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
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/068—Ultra high molecular weight polyethylene
Abstract
The invention relates to preparation of an UHMWPE/PP/SiC composite material, in particular to a wear-resistant scratch-resistant composite material and a preparation method thereof. The preparation method comprises the steps of drying 85 parts of UHMWPE, 1-4 parts of SiC and 15 parts of PP respectively in a drying oven according to the weight part ratio, putting the dried UHMWPE, SiC and the treated product of the compound antioxidant and the SiC coupling agent together in a high-speed kneading machine for high-speed mixing, carrying out extrusion granulation by a double-screw extruder, and carrying out die pressing to obtain the UHMWPE/PP/SiC composite material. Aiming at the defects of the prior art, the invention simultaneously adopts PP and SiC nano particles to fill and modify UHMWPE, improves the fluidity and the processing performance of the UHMWPE, and endows the UHMWPE with excellent wear resistance and scratch resistance.
Description
Technical Field
The invention relates to preparation of an UHMWPE/PP/SiC composite material, in particular to a preparation method of a wear-resistant scratch-resistant composite material.
Background
The high molecular weight polyethylene (UHMWPE) generally refers to linear polyethylene with the viscosity-average molecular weight of more than 150 ten thousand, and due to the extremely high molecular weight and the highly entangled structure, the high molecular weight polyethylene (UHMWPE) endows other general engineering plastics with incomparable excellent performance, and has key application in the fields of biological medicine, national defense and military industry, mechanical engineering, transportation pipelines and the like. Although UHMWPE has excellent wear resistance, its use in the friction industry is still insufficient. Mainly because of its low heat distortion temperature,The low hardness and poor heat conduction limit the application of the friction material in the friction field. Further, the melt flow rate of UHMWPE was 0 and the melt viscosity was 108pa/s, extremely poor in fluidity, and therefore, it is difficult to employ conventional processing methods such as screw extrusion, injection molding, etc., which brings great difficulty in molding processing.
The blending modification of UHMWPE and low molecular weight polyolefin is one of the more convenient and effective methods for improving the flowability at present. According to the reports of documents, the melt viscosity of UHMWPE/LLDPE, UHMWP/HDPE, UHMEPE/LDPE and UHMWPE/PP blended alloy can be effectively reduced, so that the UHMWPE can be extruded and molded by double screws, and the processing efficiency of UHMWPE is remarkably improved. In addition, PP can effectively reduce the melt flow rate and improve the wear resistance of UHMWPE. However, the compatibility between UHMWPE and PP is poor, PP cannot permeate into the interior of UHMWPE to participate in the formation of an entangled network of the UHMWPE, and a large number of weak phase interfaces exist in the UHMWPE/PP, which are not beneficial to the transmission of stress, so that the mechanical property of the UHMWPE is remarkably reduced, and the original excellent mechanical property of the UHMWPE is lost.
The nano particles have larger specific surface area and stronger adsorbability to polymer molecular chains, so the method has important significance for compatibilization modification of an incompatible blending system by adopting the nano particles. The invention mainly adopts nano SiC to compatibilize and modify UHMWPE/PP to prepare the UHMWPE/PP/SiC composite material with high wear resistance, scraping resistance and excellent mechanical property, wherein the wear loss can be reduced from 12.4mg of pure UHMWPE to 0.4mg, and the tensile strength is as high as 32.9 MPa. The composite material is expected to be applied to the fields of high-wear-resistance UHMWPE pipes, plates and the like.
Disclosure of Invention
Aiming at the defects of the prior art, the invention simultaneously adopts PP and SiC nano particles to fill and modify UHMWPE, improves the fluidity and the processing performance of the UHMWPE, and endows the UHMWPE with excellent wear resistance and scratch resistance.
In order to realize the purpose of the invention, the specific technical scheme is as follows:
1) formulation composition
A wear-resistant and scratch-resistant UHMWPE/PP/SiC composite material is composed of the following formula in parts by weight:
the UHMWPE is powder, the average particle size is 100 mu m, and the molecular weight is 500 ten thousand.
The PP granular material has the mark of Z30s and the melt flow rate of 25g/10min, and is provided by the Branch of China petrochemical industry, Inc.
The SiC is nano-scale and has purity>95% of particle size<500nm, specific surface area greater than 30m2/g。
The compound antioxidant is prepared by compounding antioxidant 420, antioxidant 1010 and antioxidant 168 according to equal weight part ratio.
The coupling agent is a silane coupling agent KH-550.
2) Preparation method
The preparation method comprises the following steps:
A. and (3) drying: respectively drying UHMWPE, SiC and PP in a drying oven for 4-6 h at the temperature of 80 ℃;
B. blending: putting the UHMWPE powder, the compound antioxidant and the SiC coupling agent treatment product together into a high-speed kneading machine, and mixing for 5-10 min at a high speed, wherein the rotating speed of the high-speed kneading machine is 34000 rpm;
C. extruding and granulating the raw materials which are fully and uniformly mixed by a double-screw extruder;
D. compression molding: and E, putting the granules granulated in the step E into a mould, carrying out hot pressing for 20min under the conditions of high temperature of 210 ℃ and pressurization of 17MPa, so that the mixture is fully melted and plasticized in a melting cavity of the mould, then carrying out cold pressing for 20min at room temperature of 17MPa, fully cooling, and demoulding to obtain the UHMWPE/PP/SiC composite material.
The SiC coupling agent treated product is prepared by the following method: adding SiC and a silane coupling agent KH-550 into a high-speed mixer, keeping the rotating speed at 600-2000 rpm, and stirring at a high speed for 5-30 min to obtain the SiC-modified silicon carbide material.
The compound antioxidant is prepared by mixing the antioxidant 420, the antioxidant 1010 and the antioxidant 168 according to the mass ratio of 1:1: 1.
And (3) extruding and granulating: and (3) carrying out extrusion granulation on the fully and uniformly mixed raw material double-screw extruder, wherein the extrusion process comprises the first zone temperature of 140-150 ℃, the second zone temperature of 160-180 ℃, the third zone temperature of 185-195 ℃, the fourth zone temperature of 200-210 ℃, the fifth zone temperature of 200-210 ℃, the die head temperature of 200-205 ℃ and the rotation speed of a main machine of 200 rpm.
After the technical scheme is adopted, the invention has the following characteristics and advantages: 1. the product has good molding effect and no melt fracture phenomenon; 2. the product has higher tensile strength, elongation at break and hardness; 3. the product has excellent wear resistance; 5. the product with different shapes can be prepared according to the product requirement. The composite material has excellent wear resistance and scratch resistance, and simultaneously retains the excellent mechanical properties of the ultrahigh molecular polyethylene.
Drawings
FIG. 1 shows the effect of the content of nano SiC in the ultra-high molecular weight polyethylene/PP/SiC composite material of the present invention on the amount of wear.
FIG. 2 shows the influence of the content of nano SiC in the ultra-high molecular weight polyethylene/PP/SiC composite material of the present invention on the mechanical properties.
FIG. 3 shows the effect of the content of SiC nanoparticles on the scratch resistance of the UHMWPE/PP/SiC composite material.
Detailed Description
The UHMWPE adopted in the following embodiment of the invention is manufactured by German Thailand Co., Ltd, the average grain diameter is 100 μm, and the molecular weight is 500 ten thousand; the adopted PP granular material has the brand number of Z30s, the melt flow rate of 25g/10min and is a product provided by the Branch company of China petrochemical industry, Inc.; purity of the nano SiC used>95% of particle size<500nm, specific surface area greater than 30m2/g。
Example 1
1. The formula comprises the following components:
85Kg of UHMWPE powder, 15Kg of PP granules, 1Kg of nano SiC, 0.5Kg of compound antioxidant (antioxidant 420, antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1:1) and 0.5Kg of silane coupling agent.
2. Preparation method
A. And (3) drying: drying UHMWPE, SiC and PP for 6h in a drying oven at the temperature of 80 ℃;
B. weighing: weighing the coupling agent, the antioxidant and the dried UHMWPE powder according to the formula amount;
c, SiC coupling agent treatment: adding SiC and a silane coupling agent KH-550 into a high-speed mixer, keeping the rotating speed at 2000rpm, and stirring at high speed for 5min to obtain a SiC coupling agent treatment product;
D. blending: placing UHMWPE powder, a compound antioxidant and the SiC coupling agent treatment product prepared in the step C into a high-speed kneader to be mixed for 8min at a high speed, wherein the rotating speed of the high-speed mixer is 34000 rpm;
E. and (3) double-screw extrusion granulation: extruding and granulating the fully and uniformly mixed raw materials by a double-screw extruder, wherein the extrusion process comprises the steps of 140 ℃ in the first zone, 170 ℃ in the second zone, 185 ℃ in the third zone, 200 ℃ in the fourth zone, 210 ℃ in the fifth zone, 200 ℃ in the die head and 200rpm in the rotation speed of a main machine;
F. compression molding: and E, putting the granules granulated in the step E into a mould, carrying out hot pressing for 20min under the conditions of high temperature of 210 ℃ and pressurization of 17MPa, so that the mixture is fully melted and plasticized in a melting cavity of the mould, then carrying out cold pressing for 20min at room temperature of 17MPa, fully cooling, and demoulding to obtain the UHMWPE/PP/SiC composite material.
As can be seen from FIG. 1, the wear loss of the UHMWPE/PP/SiC composite material prepared by the present example is only 0.4mg when the amount of added SiC is 1 part.
Example 2
1. The formula comprises the following components:
85Kg of UHMWPE powder, 15Kg of PP granules, 2Kg of nano SiC, 0.5Kg of compound antioxidant (oxygen agent 420, antioxidant 1010 and antioxidant 168 are compounded in a mass ratio of 1:1:1) and 0.5Kg of silane coupling agent.
3) Preparation method
The preparation method comprises the following steps:
A. and (3) drying: drying UHMWPE, SiC and PP for 4h at 80 ℃ in a drying oven;
B. weighing: weighing the coupling agent, the antioxidant and the dried UHMWPE powder according to the formula amount;
c, SiC coupling agent treatment: adding SiC and a silane coupling agent KH-550 into a high-speed mixer, keeping the rotating speed at 600rpm, and stirring at a high speed for 30min to obtain a SiC coupling agent treatment product;
D. blending: placing UHMWPE powder, a compound antioxidant and the SiC coupling agent treatment product prepared in the step C into a high-speed kneader to be mixed for 10min at a high speed, wherein the rotating speed of the high-speed mixer is 34000 rpm;
E. and (3) double-screw extrusion granulation: extruding and granulating the fully and uniformly mixed raw materials by a double-screw extruder, wherein the extrusion process comprises the steps of 150 ℃ in a first zone, 180 ℃ in a second zone, 185 ℃ in a third zone, 200 ℃ in a fourth zone, 210 ℃ in a fifth zone, 205 ℃ in a die head and 200rpm in the rotating speed of a main machine;
F. compression molding: and E, putting the granules granulated in the step E into a mould, carrying out hot pressing for 20min under the conditions of high temperature of 210 ℃ and pressurization of 17MPa, so that the mixture is fully melted and plasticized in a melting cavity of the mould, then carrying out cold pressing for 20min at room temperature of 17MPa, fully cooling, and demoulding to obtain the UHMWPE/PP/SiC composite material.
Example 3
1. The formula comprises the following components:
85Kg of UHMWPE powder, 15Kg of PP granules, 3Kg of nano SiC, 0.5Kg of antioxidant 420/antioxidant 1010/antioxidant 168 compound (mass ratio is 1/1/1), and 0.5Kg of silane coupling agent.
2. Preparation method
The preparation method comprises the following steps:
A. and (3) drying: drying UHMWPE, SiC and PP in a drying oven for 5h at the temperature of 80 ℃;
B. weighing: weighing the coupling agent, the antioxidant and the dried UHMWPE powder according to the formula amount;
c, SiC coupling agent treatment: adding SiC and a silane coupling agent KH-550 into a high-speed mixer, keeping the rotating speed at 1200rpm, and stirring at a high speed for 15min to obtain a SiC coupling agent treatment product;
D. blending: placing UHMWPE powder, a compound antioxidant and the SiC coupling agent treatment product prepared in the step C into a high-speed kneader to be mixed for 5min at a high speed, wherein the rotating speed of the high-speed mixer is 34000 rpm;
E. and (3) double-screw extrusion granulation: extruding and granulating the raw materials which are fully and uniformly mixed by a double-screw extruder, wherein the extrusion process comprises the first zone temperature of 145 ℃, the second zone temperature of 170 ℃, the third zone temperature of 190 ℃, the fourth zone temperature of 205 ℃, the fifth zone temperature of 205 ℃, the die head temperature of 205 ℃ and the rotating speed of a main machine of 200 rpm;
F. compression molding: and E, putting the granules granulated in the step E into a mould, carrying out hot pressing for 20min under the conditions of high temperature of 210 ℃ and pressurization of 17MPa, so that the mixture is fully melted and plasticized in a melting cavity of the mould, then carrying out cold pressing for 20min at room temperature of 17MPa, fully cooling, and demoulding to obtain the UHMWPE/PP/SiC composite material.
Example 4
1. The formula comprises the following components:
85Kg of UHMWPE powder, 15Kg of PP granules, 4Kg of nano SiC, 0.5Kg of antioxidant 420/antioxidant 1010/antioxidant 168 compound (mass ratio is 1/1/1), and 0.5Kg of silane coupling agent.
2. The preparation method comprises the following steps:
A. and (3) drying: drying UHMWPE, SiC and PP for 4h at 80 ℃ in a drying oven;
B. weighing: weighing the coupling agent, the antioxidant and the dried UHMWPE powder according to the formula amount;
c, SiC coupling agent treatment: adding SiC and a silane coupling agent KH-550 into a high-speed mixer, keeping the rotating speed at 1000rpm, and stirring at high speed for 25min to obtain a SiC coupling agent treatment product;
D. blending: placing UHMWPE powder, a compound antioxidant and the SiC coupling agent treatment product prepared in the step C into a high-speed kneader to be mixed for 10min at a high speed, wherein the rotating speed of the high-speed mixer is 34000 rpm;
E. and (3) double-screw extrusion granulation: extruding and granulating the fully and uniformly mixed raw materials by a double-screw extruder, wherein the extrusion process comprises the steps of 140 ℃ in a first zone, 180 ℃ in a second zone, 185 ℃ in a third zone, 200 ℃ in a fourth zone, 200 ℃ in a fifth zone, 205 ℃ in a die head and 200rpm in the rotating speed of a main machine;
F. compression molding: and E, putting the granules granulated in the step E into a mould, carrying out hot pressing for 20min under the conditions of high temperature of 210 ℃ and pressurization of 17MPa, so that the mixture is fully melted and plasticized in a melting cavity of the mould, then carrying out cold pressing for 20min at room temperature of 17MPa, fully cooling, and demoulding to obtain the UHMWPE/PP/SiC composite material.
Claims (5)
1. The preparation method of the wear-resistant scratch-resistant composite material is characterized by comprising the following steps of:
1) the formula comprises the following components in parts by weight:
UHMWPE powder 85
PP pellets 15
SiC 1-3
Compound antioxidant 0.5
0.5 of silane coupling agent;
2) preparation method
A. And (3) drying: respectively drying UHMWPE powder, SiC and PP granules in a drying oven at 80 ℃ for 4-6 h;
B. blending: putting the UHMWPE powder, the compound antioxidant and the SiC coupling agent treatment product together into a high-speed kneading machine, and mixing for 5-10 min at a high speed, wherein the rotating speed of the high-speed kneading machine is 34000 rpm;
the SiC coupling agent treated product is prepared by the following method: adding SiC and a silane coupling agent KH-550 into a high-speed mixer, keeping the rotating speed at 600-2000 rpm, and stirring at a high speed for 5-30 min to obtain the SiC-modified silicon carbide material;
C. b, extruding and granulating the raw materials obtained in the step B by using a double-screw extruder; the extrusion process comprises the steps of enabling the temperature of a first zone to be 140-150 ℃, the temperature of a second zone to be 160-180 ℃, the temperature of a third zone to be 185-195 ℃, the temperature of a fourth zone to be 200-210 ℃, the temperature of a fifth zone to be 200-210 ℃, the temperature of a die head to be 200-205 ℃ and the rotating speed of a main machine to be 200 rpm;
D. compression molding: and D, putting the granules granulated in the step C into a mould, carrying out hot pressing for 20min under the conditions of high temperature of 210 ℃ and pressurization of 17MPa, so that the mixture is fully melted and plasticized in a melting cavity of the mould, then carrying out cold pressing for 20min at room temperature of 17MPa, fully cooling, and demoulding to obtain the UHMWPE/PP/SiC composite material.
2. The method for preparing a wear-resistant scratch-resistant composite material according to claim 1, wherein the UHMWPE powder has an average particle size of 100 μm and a molecular weight of 500 ten thousand.
3. The process according to claim 1, wherein the PP pellets have a designation Z30s and a melt flow rate of 25g/10 min.
4. The method of claim 1, wherein the SiC is in the nanometer range and has a purity of about one hundred and eighty percent (k)>95% of particle size<500nm, specific surface area greater than 30m2/g。
5. The preparation method of the wear-resistant scratch-resistant composite material according to claim 1, wherein the compound antioxidant is prepared by compounding the antioxidant 420, the antioxidant 1010 and the antioxidant 168 according to the equal weight part ratio.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1478811A (en) * | 2002-08-29 | 2004-03-03 | 四川大学 | Super high molecular weight polyethylene blend capable of using in extrusion processing and its processing method |
| CN101842226A (en) * | 2007-10-31 | 2010-09-22 | 纳幕尔杜邦公司 | Highly abrasion-resistant ionomer pipes |
| KR20100108997A (en) * | 2009-03-31 | 2010-10-08 | 주식회사 엘지화학 | A separator having porous coating layer and electrochemical device containing the same |
| CN102875878A (en) * | 2012-10-08 | 2013-01-16 | 安徽卧龙泵阀有限责任公司 | Wear-resistant and corrosion-resistant composite material |
| CN104558770A (en) * | 2014-12-19 | 2015-04-29 | 广东特固力士工业皮带有限公司 | Ultrahigh-molecular weight polyethylene composite material and preparation method thereof |
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- 2019-10-12 CN CN201910969429.4A patent/CN110684262B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1478811A (en) * | 2002-08-29 | 2004-03-03 | 四川大学 | Super high molecular weight polyethylene blend capable of using in extrusion processing and its processing method |
| CN101842226A (en) * | 2007-10-31 | 2010-09-22 | 纳幕尔杜邦公司 | Highly abrasion-resistant ionomer pipes |
| KR20100108997A (en) * | 2009-03-31 | 2010-10-08 | 주식회사 엘지화학 | A separator having porous coating layer and electrochemical device containing the same |
| CN102875878A (en) * | 2012-10-08 | 2013-01-16 | 安徽卧龙泵阀有限责任公司 | Wear-resistant and corrosion-resistant composite material |
| CN104558770A (en) * | 2014-12-19 | 2015-04-29 | 广东特固力士工业皮带有限公司 | Ultrahigh-molecular weight polyethylene composite material and preparation method thereof |
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