Wear-resisting heat-conducting polyurethane bearing as well as preparation method and application thereof

A polyurethane and polyurethane prepolymer technology, applied in the field of lightweight wear-resistant materials, can solve the problems of expanding temperature range and serious phase separation, and achieve good thermal conductivity, simple molding process, and avoid poor lubricity

Inactive Publication Date: 2013-10-16
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been reported that the multiphase system of blending and copolymerization can achieve the purpose of extending the temperature range, but it often shows two narrowly separated damping peaks due to severe phase separation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Preparation of wear-resistant and heat-conducting polyurethane bearing

[0035] (1) Surface modification of graphene: Add 50mL of 10wt% ethanol solution of KH550 silane coupling agent to 2g of graphene (Ningbo Institute of Materials, Chinese Academy of Sciences), heat and reflux at 60°C for 6h, and dry for later use.

[0036] (2) Preparation of wear-resistant and heat-conductive polyurethane bearings: Kevlar fibers with a length of 1 mm (DuPont, USA) were pre-impregnated in methyl methacrylate for ultrasonic dispersion for 1 h, and high-temperature resistant polyurethane prepolymers (Shanghai Bray Polyurethane Technology Co., Ltd.) were added. Co., Ltd.) 70 parts by weight, 30 parts by weight of curing agent diethyltoluenediamine, add the graphene prepared in step (1), mix well, degas in vacuum for 1 hour, and then pour it into a preheated mold at 100 °C , heated and solidified at 80° C. for 12 hours, cooled and demolded to obtain a wear-resistant and heat-co...

Embodiment 2

[0039] Example 2: Preparation of wear-resistant and heat-conducting polyurethane bearing

[0040] (1) The surface modification of graphene is the same as in Example 1.

[0041] (2) Preparation of wear-resistant and heat-conductive polyurethane bearings: Kevlar fibers with a length of 1 mm (DuPont, USA) were pre-impregnated in methyl methacrylate for ultrasonic dispersion for 1 h, and high-temperature resistant polyurethane prepolymers (Shanghai Bray Polyurethane Technology Co., Ltd.) were added. Co., Ltd.) 70 parts by weight, 30 parts by weight of curing agent diethyltoluenediamine, add the graphene prepared in step (1), mix well, degas in vacuum for 1 hour, and then pour it into a preheated mold at 100 °C , heated and solidified at 100°C for 10 hours, cooled and demolded to obtain a wear-resistant and heat-conducting polyurethane bearing.

[0042]Among them, the amount of Kevlar fiber is 0.5% of the total weight of polyurethane prepolymer and curing agent system, the amount ...

Embodiment 3

[0044] Example 3: Preparation of wear-resistant and heat-conducting polyurethane bearing

[0045] (1) Surface modification of graphene: Add 50mL of 10wt% ethanol solution of KH570 silane coupling agent to 2g of graphene (Ningbo Institute of Materials, Chinese Academy of Sciences), heat and reflux at 60°C for 6h, and dry for later use.

[0046] (2) Preparation of wear-resistant and heat-conductive polyurethane bearings: Kevlar fibers with a length of 1 mm (DuPont, USA) were pre-impregnated in styrene for ultrasonic dispersion for 1 hour, and high-temperature-resistant polyurethane prepolymers (Shanghai Bolei Polyurethane Technology Co., Ltd.) were added. 70 parts by weight, 30 parts by weight of curing agent diethyltoluenediamine, added the graphene prepared in step (1), mixed evenly, degassed in vacuum for 1 hour, and then poured it into a preheated mold at 120°C. ℃ heating and curing for 8 hours, cooling and demoulding to obtain wear-resistant and heat-conducting polyurethane...

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Abstract

The invention belongs to the field of light-weight wear-resisting materials and discloses a wear-resisting heat-conducting polyurethane bearing as well as an preparation method and an application thereof. The preparation method of the wear-resisting heat-conducting polyurethane bearing comprises the following steps of: soaking a fiber into a copolymer, dispersing ultrasonically, adding a polyurethane prepolymer, a curing agent and a heat-conducting filler, mixing the materials, degassing in vacuum, pouring the degassed mixture into a preheating mold, heating to cure, cooling, and demolding to obtain the wear-resisting heat-conducting polyurethane bearing. The wear-resisting heat-conducting polyurethane bearing prepared by adopting the preparation method has the advantages of light weight, wear resistance (relative volume wear loss of 150mm<3>), good heat conductivity of 4W/m*K, high strength (high modulus of compression of 520Mpa, and notched impact strength of 120J/m), low cost, long service life and the like, is simple in forming process, is suitable for industrial production and can be widely applied to clean-energy power generation equipment.

Description

technical field [0001] The invention belongs to the field of lightweight wear-resistant materials, in particular to a wear-resistant and heat-conducting polyurethane bearing and its preparation method and application. Background technique [0002] In the 21st century, energy shortage and environmental pollution have become global problems. my country, as an emerging country with the largest population in the world, has particularly prominent energy and environmental issues. For this reason, the national "12th Five-Year" energy plan formulated the goal of "2020 the proportion of non-fossil energy to reach 15% and carbon emission reduction of 40-45%, focusing on the development of clean energy and non-fossil energy, such as hydropower, wind power, nuclear power, solar energy and biomass energy, etc.” Among them, power generation equipment is an indispensable key equipment for equipment manufacturing and economic construction, and these power generation equipment all involve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/08C08L77/10C08L97/02C08F283/00C08K9/06C08K3/04C08L75/04C08L63/00
Inventor 张秀菊苏嘉濠梁贤浩徐熙玮
Owner JINAN UNIVERSITY
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