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A modified ultra-high molecular weight polyethylene and its preparation method, polyethylene composite material and its preparation method

A technology of ultra-high molecular weight and polyethylene, which is applied in the field of polyethylene composite materials and its preparation, modified ultra-high molecular weight polyethylene and its preparation, and can solve the problems of inability to improve the performance of UHMWPE, uneven stretching of UHMWPE, and filler mixing Inhomogeneity and other problems, to achieve the effect of fast speed, improved performance, and uniform dispersion

Active Publication Date: 2020-05-26
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the composite material is prepared by solution mixing in the prior art, UHMWPE stretches unevenly and mixes unevenly with fillers, and the performance of UHMWPE cannot be improved very well.

Method used

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  • A modified ultra-high molecular weight polyethylene and its preparation method, polyethylene composite material and its preparation method
  • A modified ultra-high molecular weight polyethylene and its preparation method, polyethylene composite material and its preparation method
  • A modified ultra-high molecular weight polyethylene and its preparation method, polyethylene composite material and its preparation method

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preparation example Construction

[0028] The invention provides a kind of preparation method of modified ultra-high molecular weight polyethylene, comprising the following steps:

[0029] (1) 1,3,5-trichlorobenzene is mixed with ultra-high molecular weight polyethylene and filler in turn to obtain a suspension;

[0030] (2) cooling the suspension obtained in the step (1) to room temperature to obtain a solid mixture; removing 1,3,5-trichlorobenzene in the solid mixture to obtain the modified ultra-high molecular weight polyethylene.

[0031] In the invention, 1,3,5-trichlorobenzene is sequentially mixed with ultra-high molecular weight polyethylene and filler to obtain a suspension. In the present invention, the mass ratio of the 1,3,5-trichlorobenzene to the ultra-high molecular weight polyethylene is preferably 500: 1-10, more preferably 500: 2-8; the filler and the ultra-high molecular weight polyethylene The mass ratio of ethylene is preferably 10:90 to 70:30, more preferably 20:80 to 60:40, and still mor...

Embodiment 1

[0050] (1) Mix 9g of UHMWPE (molecular weight: 2.2 million) and 500g of 1,3,5-trichlorobenzene at room temperature for 10min, then heat to 150°C, and mix at high temperature under the condition of magnetic stirring until the solution is free of particulate matter, to obtain Ultra-high molecular weight polyethylene solution; then add 1g CNT (purchased from Nanocyl, Belgium) and carry out ultrasonic stirring for 30min to obtain a suspension;

[0051] (2) The suspension was rapidly cooled to room temperature with water to obtain a solid mixture; 2000 mL of tetrahydrofuran was added to the solid mixture, stirred at room temperature for 2 hours, suction filtered, and the solid obtained by suction filtration was repeatedly washed with tetrahydrofuran until the washing liquid was colorless, and the solid Dry naturally to obtain modified ultra-high molecular weight polyethylene.

[0052] The modified ultra-high molecular weight polyethylene obtained in this embodiment is used to prepa...

Embodiment 2

[0056] (1) Premix 8g of UHMWPE (molecular weight: 2.2 million) and 500g of 1,3,5-trichlorobenzene at room temperature for 10 minutes, heat to 150°C, and mix at high temperature under the condition of magnetic stirring. Molecular weight polyethylene solution; then add 2g CNT (purchased from Nanocyl, Belgium) and carry out ultrasonic stirring for 30min to obtain a suspension;

[0057] (2) The suspension was rapidly cooled to room temperature with water to obtain a solid mixture; 2000 mL of tetrahydrofuran was added to the solid mixture, stirred at room temperature for 2 hours, suction filtered, and the solid obtained by suction filtration was repeatedly washed with tetrahydrofuran until the washing liquid was colorless, and the solid Dry naturally to obtain modified ultra-high molecular weight polyethylene.

[0058] The modified ultra-high molecular weight polyethylene obtained in this embodiment is used to prepare a polyethylene composite material, comprising the following step...

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Abstract

The invention provides a modified ultrahigh-molecular-height polyethylene, a preparation method thereof, a polyethylene compound material and a preparation method thereof and belongs to the technicalfield of preparation of high-polymer materials. According to the modified ultrahigh-molecular-height polyethylene and the preparation method thereof, 1, 3, 5-trichlorobenzene serves as solvent with amelting point considerably higher than the room temperature and can easily dissolve ultrahigh-molecular-height polyethylene; the dilution effects of the solvent can reduce the viscosity of the ultrahigh-molecular-height polyethylene can and meanwhile ensure that the molecular chains of the ultrahigh-molecular-height polyethylene can be in an expanded state, so than when being mixed with filler, the ultrahigh-molecular-height polyethylene can be uniformly dispersed in the filler and further compounded with the filter to ensure the performance of the modified ultrahigh-molecular-height polyethylene. Data suggests that a polyethylene compound material film prepared from the modified ultrahigh-molecular-height polyethylene can achieve an electric conductivity of 200-580 s*m-1, a tensile modulus of 1250-2750 MPa and a tensile strength of 10-37 MPa.

Description

technical field [0001] The invention relates to the technical field of polymer material preparation, in particular to a modified ultra-high molecular weight polyethylene and a preparation method thereof, a polyethylene composite material and a preparation method thereof. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) is a thermoplastic engineering plastic with a molecular weight of more than 1.5 million and a linear structure. It has excellent impact resistance, wear resistance, self-lubrication, chemical resistance, and low temperature resistance. In view of its excellent performance, UHMWPE is often used in biomedicine, security textiles, electronic science, mechanical parts, construction industry, chemical industry and other fields. [0003] Although UHMWPE has many excellent properties, there are still some problems restricting its application. First of all, UHMWPE has high molecular weight, long molecular chain and no polar groups, whic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08K3/04C08J3/215C08J5/18
CPCC08J3/215C08J5/18C08J2323/06C08K3/041
Inventor 章自寿麦堪成伍泽雄张扬帆李富镇杨康陈耀光刘秀
Owner SUN YAT SEN UNIV
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