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Preparation method of carbon fiber and silicon dioxide nanosphere synergically filled ultra-high molecular weight polyethylene wear-resistant material

An ultra-high molecular weight, silicon dioxide technology, applied in the field of nano-tribology, can solve the problems of nano-scale SNS filling macromolecular materials difficult, the enhancement effect is not obvious, etc., to achieve good processing and forming ability, good mortar wear performance, good The effect of friction and wear resistance

Active Publication Date: 2018-02-06
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, the above-mentioned nano-SiO 2 Nano-SiO in particle reinforced UHMWPE composites 2 The filling amount of particles reached 15%, which is contrary to the principle of small amount of nanoparticles, indicating that nano-SiO 2 The particles are seriously agglomerated in the composite material, and the reinforcement effect is not obvious
[0009] It is very difficult to fill nanoscale SNS with polymer materials by general methods

Method used

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  • Preparation method of carbon fiber and silicon dioxide nanosphere synergically filled ultra-high molecular weight polyethylene wear-resistant material

Examples

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Embodiment 1

[0035] 1. Put a carbon fiber (CF) with a diameter of 1-10 μm and a length of 10-60 μm in a beaker, add an aqueous solution of nitric acid with a concentration of 5-50wt.%, and then carry out a stirring reaction at 25-80°C for 2 hours, and the reaction is completed After suction filtration, the solid phase was washed with deionized water and alcohol for 2 to 3 times, and dried to obtain nitric acid modified carbon fiber (CFN).

[0036] The mixing volume ratio of the above nitric acid aqueous solution and carbon fiber is 2-10:1.

[0037] 2. Weigh 52 g of nitric acid modified carbon fiber (CFN) into a 500 mL round bottom flask, measure 150 mL of ethanol with a graduated cylinder, add it to the flask, and stir magnetically in a water bath at 40°C to make the nitric acid modified carbon fiber ( CFN) was dissolved in ethanol solution, and then 18g tetraethyl orthosilicate (TEOS) was added, and the stirring was continued for 5 min. Slowly drop the ammonia solution into the flask (ab...

Embodiment 2

[0043] Steps 1-3 are the same as the above example.

[0044] Take 2.6g of the obtained coupling-treated composite filler (SNS / CF) and 130g of ultra-high molecular weight polyethylene (molecular weight: 3,000,000-16,000,000), and mix them in a high-speed mixer for 5 minutes to obtain a mixture.

[0045] Take the mixture and press it on a hydraulic press, set the working temperature of the hydraulic press at 190°C, preheat for 15 minutes, press at 10MPa pressure for 10 minutes, and then cold press at room temperature on a flat vulcanizing machine with a working temperature of 60°C and a pressure of 10MPa After 5 minutes, an ultra-high molecular weight polyethylene wear-resistant material co-filled with sheet-like carbon fibers and silica nanospheres was obtained. The main properties of the material are listed in Table 1.

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Abstract

The invention discloses a preparation method of a carbon fiber and silicon dioxide nanosphere synergically filled ultra-high molecular weight polyethylene wear-resistant material and relates to the field of nanotribology, in particular dispersion of a nano material in high molecular resin and tribological properties thereof. The preparation method comprises the following steps: firstly, modifyingthe carbon fibers with nitric acid to obtain nitric acid modified carbon fibers; loading silicon dioxide nanospheres on the surfaces of nitric acid modified carbon fibers by means of a sol-gel processto obtain a composite material of silicon dioxide nanospheres and carbon fibers, and performing surface coupling treatment to obtain coupled composite packing; and finally, mixing the coupled composite packing with ultra-high molecular weight polyethylene, and performing hot pressing and sulfidizing to obtain the carbon fiber and silicon dioxide nanosphere synergically filled ultra-high molecularweight polyethylene wear-resistant material. The composite material has relatively good mechanical property, frictional wear-resistant property, mortar wear property and machine shaping property.

Description

technical field [0001] The invention relates to the field of nano tribology, in particular to the dispersion of nano material in polymer resin and its tribological performance. Background technique [0002] Physical filling modification is the simplest and easiest polymer modification method to realize industrialization. Mix one or more fillers with the polymer uniformly through a certain dispersion method, and usually use silica, fiber, molybdenum disulfide, copper powder and other inorganic fillers as the reinforcing phase to improve the mechanical and tribological properties of the polymer . These inorganic fillers can generally be used as nucleating agents for matrix materials, allowing macromolecular chains to crystallize around them, thereby enhancing interfacial adhesion. When the composite material is subjected to external forces, the interface will transfer stress to these inorganic fillers to play a supporting role. The role of the structure, improve and overcome...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08K9/06C08K9/02C08K7/06C08K7/18
CPCC08K7/06C08K7/18C08K9/02C08K9/06C08K2201/003C08K2201/004C08K2201/011C08L2207/068C08L23/06
Inventor 石国军冯春亮曹臻颜笑天
Owner YANGZHOU UNIV
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