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Hyperbranched polymer surface grafted and modified inorganic nanoparticle/epoxy resin anti-friction wear-resistant composite material and preparation method thereof

A nano-inorganic particle, surface graft modification technology, applied in the field of polymer materials, can solve the problems of harsh conditions, complicated steps, long reaction time, etc., to improve friction and wear resistance, strengthen interaction, and easy to implement. Effect

Inactive Publication Date: 2010-04-07
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the problems of poor dispersion and weak interfacial interaction of nanoparticles in the polymer matrix have not been well resolved.
However, the common disadvantages of the above methods are that the steps are cumbersome, the reaction time is long, and the conditions are harsh, which is not conducive to industrial application.

Method used

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  • Hyperbranched polymer surface grafted and modified inorganic nanoparticle/epoxy resin anti-friction wear-resistant composite material and preparation method thereof
  • Hyperbranched polymer surface grafted and modified inorganic nanoparticle/epoxy resin anti-friction wear-resistant composite material and preparation method thereof
  • Hyperbranched polymer surface grafted and modified inorganic nanoparticle/epoxy resin anti-friction wear-resistant composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This example illustrates the use of aromatic monomers to prepare hyperbranched polyamide surface graft modified nano SiO 2 The method includes the following three steps:

[0028] (1) Nano SiO 2 Pretreatment: the nano SiO 2 Dry in a vacuum drying oven at 120°C for 48 hours to remove the moisture adsorbed on the surface.

[0029] (2) Surface treatment of coupling agent: 1 part by weight of nano SiO 2 Add 17 parts by weight of solvent (toluene) into a three-necked flask with reflux device, disperse ultrasonically for 30 minutes, pass in inert protective gas, and add 0.25 parts by weight of silane coupling agent γ-aminopropylethoxysilane , The reaction was refluxed for 8 hours under mechanical stirring, filtered after the reaction, and extracted with absolute ethanol for 48 hours, and dried in vacuum for 24 hours to obtain nano-SiO after the coupling agent 2 , The grafting rate is 12%.

[0030] (3) Melt polycondensation surface grafting: 1 part by weight of nano SiO treated with c...

Embodiment 2

[0032] Preparation of epoxy resin anti-friction and wear-resistant composite material: Weigh 6.9 parts by weight of the nano-SiO grafted on the surface of the hyperbranched polymer prepared in Example 1 2 , Added to 100 parts by weight of bisphenol A epoxy resin E51, mechanically stirred at 100°C for 3 hours, and ultrasonicated for 1 hour to achieve full dispersion. Then, it is heated to 130°C under mechanical stirring, and 32 parts by weight of the curing agent 4,4'-diaminodiphenyl sulfone is slowly added to make it fully dissolved for 20 minutes. The mixture is quickly poured into a mold that has been preheated at 110°C, and the bubbles are removed in a vacuum oven at 110°C for 45 minutes, and then the temperature is raised and solidified according to the following program: 100°C 3h; 140°C 2h; 180°C 2h; 200°C After curing for 2h; natural cooling to room temperature.

[0033] The friction and wear test was carried out on the M-200 wear tester. The friction type is ring-block sl...

Embodiment 3

[0036] Weigh 14.7 parts by weight of the nano-SiO grafted on the surface of the hyperbranched polymer prepared in Example 1. 2 , Added to 100 parts by weight of epoxy resin E51, mechanically stirred at 100°C for 3 hours, and ultrasonicated for 1 hour to achieve full dispersion. Then, it is heated to 130°C under mechanical stirring, and 32 parts by weight of the curing agent 4,4'-diaminodiphenyl sulfone is slowly added to make it fully dissolved for 20 minutes. The mixture is quickly poured into a mold that has been preheated at 110°C, and the bubbles are removed in a vacuum oven at 110°C for 45 minutes, and then the temperature is raised and solidified according to the following program: 100°C 3h; 140°C 2h; 180°C 2h; 200°C After curing for 2h; natural cooling to room temperature.

[0037] The test method of friction and wear performance is the same as in Example 2, and the results are shown in Table 1.

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Abstract

The invention discloses a hyperbranched polymer surface grafted and modified inorganic nanoparticle / epoxy resin anti-friction wear-resistant composite material and a preparation method thereof. The epoxy resin anti-friction wear-resistant composite material comprises the following compositions in part by weight: 90 to 98 parts of epoxy resin, 1 to 10 parts of inorganic nanoparticles, and 0.3 to 3 parts of a grafting monomer. The material and the method ensure that the inorganic nanoparticles can participate in a cure reaction of the epoxy resin through hyperbranched graft modification by introducing rich end functional groups, improve the interaction of an interface between particles and a resin matrix, and improve the compatibility of the interface so as to remarkably improve the friction and wear performance of the epoxy resin anti-friction wear-resistant material. The method has a simple process and easy implementation, and can be widely applied in the field of epoxy resin paints and miniature devices.

Description

Technical field [0001] The invention relates to the field of polymer materials, and in particular to a method for preparing nano-inorganic particles by grafting modification on hyperbranched surfaces and filling epoxy resin antifriction and wear-resistant materials. Background technique [0002] As a high-performance thermosetting plastic, epoxy resin has the advantages of excellent performance, easy forming and processing, and low cost. It is widely used in the fields of electronics, construction, coatings, and mechanical parts. However, due to the high cross-linking characteristics of epoxy resin, it is brittle and hard, and its friction and wear properties are far inferior to thermoplastics such as nylon and PEEK. With the development of micro devices and epoxy coatings, some application fields have put forward higher requirements for the wear resistance of epoxy resins. Existing studies have shown that nano-particle filling can effectively improve the wear resistance of poly...

Claims

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Application Information

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IPC IPC(8): C08G59/40
Inventor 喻颖容敏智章明秋
Owner SUN YAT SEN UNIV
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