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Composite friction material and its preparation method and preparation device

A technology of composite friction materials and compounds, which is applied in the field of material science, can solve the problems of composite material products such as limited use, high wear rate, wear resistance, and poor self-lubrication, and achieve light weight, uniform distribution, and wide operating temperature range. wide effect

Active Publication Date: 2018-10-12
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The friction characteristics of polyamide 6 composite materials are relatively outstanding, but its wear resistance and self-lubricating properties are not good, and the wear rate is relatively high. In addition, the use of composite products is often limited in occasions that require high impact and wear resistance at the same time.

Method used

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  • Composite friction material and its preparation method and preparation device
  • Composite friction material and its preparation method and preparation device
  • Composite friction material and its preparation method and preparation device

Examples

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Embodiment 1

[0049] A preparation method of the composite friction material of the present invention, the process flow is as follows figure 1 shown, including the following steps:

[0050] (1) Add 410g caprolactam monomer and 8.2g catalyst sodium hydroxide into the first reaction kettle 1 and heat to 130°C, melt, vacuumize (vacuum degree-0.1MPa), and dehydrate for 20min to obtain the first reaction liquid (caprolactam anion ).

[0051] (2) Add 400g of caprolactam monomer into the second reaction kettle 2, melt at 130°C, vacuum dehydrate for 10min, and the vacuum degree is -0.1MPa, mix 72g of polyether glycol (which has been vacuumized for 1 hour) and 18g of di Benzyl methane diisocyanate MDI is added in the second reactor 2, reacts 0.5h, finally adds the colloidal graphite lubricant (the molybdenum disulphide that also has -OH group on the surface for use with -OH group after drying) lubricant, polytetrafluoroethylene lubricant) 45g, and then reacted for 0.5h to obtain the second reactio...

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Abstract

The invention discloses a composite friction material and a preparation method and device thereof. The preparation method comprises the steps that 1, a caprolactam monomer reacts with a catalyst to obtain a first reaction solution; 2, the caprolactam monomer, polyether polyol and an isocyanate compound react with a solid lubricant with a -OH group on the surface to obtain a second reaction solution; 3, the first reaction solution and the second reaction solution are mixed for hot forming to obtain the composite friction material. The preparation device comprises a first reaction kettle, a second reaction kettle, a vacuum pump, a mold and a heating furnace. The first reaction kettle and the second reaction kettle are communicated with the vacuum pump through a first buffer pipeline and a second buffer pipeline. The first buffer pipeline and the second buffer pipeline are provided with buffer kettles. The first reaction kettle and the second reaction kettle are communicated with a mixed feeding pipe on the mold through a first discharge pipe and a second discharge pipe. According to the composite friction material prepared through the preparation method and device, tensile strength performance and bending strength performance are ensured, and meanwhile indoor temperature and low temperature impact toughness and friction wear performance are greatly improved.

Description

technical field [0001] The invention belongs to the field of material science and technology, and relates to a composite friction material, a preparation method and a preparation device thereof, in particular to a polyamide 6 / polyurethane / solid lubricant composite friction material, a preparation method and a preparation device thereof. Background technique [0002] The surface hardness of polymer materials is low, the bearing capacity is poor, and it is easy to wear. In order to improve its tribological properties, it is necessary to physically or chemically modify the polymers to make polymer matrix composites, so that they have excellent tribological properties. Widely used in occasions requiring dry friction, heavy load, low speed, etc. The friction characteristics of polyamide 6 composite materials are relatively outstanding, but its wear resistance and self-lubricating properties are not good, and the wear rate is relatively high. In addition, the use of composite prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/40C08G69/18C08G18/66C08G18/48C08G18/38C08G18/12C09K3/14
Inventor 邓鑫
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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