Fiber and red mud co-modified epoxy resin composite material and preparation method thereof

A technology of epoxy resin and composite materials, applied in the field of composite materials, can solve the problems of high cost and limit the application potential of modification methods, and achieve the effects of excellent toughness and strength, good mechanical properties and tribological properties

Active Publication Date: 2022-05-13
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high price of dopamine also limits the application potential of this modification method

Method used

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  • Fiber and red mud co-modified epoxy resin composite material and preparation method thereof
  • Fiber and red mud co-modified epoxy resin composite material and preparation method thereof
  • Fiber and red mud co-modified epoxy resin composite material and preparation method thereof

Examples

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Effect test

preparation example Construction

[0030] In the present invention, the preparation method of the coupling agent surface modified red mud material preferably includes the following steps:

[0031] Mixing red mud, organic acid and water, followed by dealkalization treatment and sedimentation separation treatment, to obtain dealkalization red mud;

[0032] Mix the dealkalized red mud, the first coupling agent, the second coupling agent with an organic solvent, and perform modification treatment to obtain a surface-modified red mud material of the coupling agent; the first coupling agent is a silane At least one of a coupling agent, an aluminate coupling agent and a titanate coupling agent, the second coupling agent is an amino coupling agent.

[0033] The invention mixes red mud, organic acid and water, and sequentially performs dealkalization treatment and sedimentation separation treatment to obtain dealkalized red mud. In the present invention, there is no special limitation on the source of the red mud (RM),...

Embodiment 1

[0077] 1. Preparation of dealkalized red mud

[0078] Add 160g of red mud (RM) into the solid pulverizer, carry out high-speed pulverization at 23000rpm, then pass the pulverized RM through a 100-mesh sieve, transfer the sieved RM into a round bottom flask, add 600mL distilled water and 20g Oxalic acid, under the condition of mechanical stirring at 1000rpm, control the reaction temperature of the oil bath to 80°C, and react for 120min to obtain the first RM dispersion; lower the temperature of the first RM dispersion to 60°C, and stir with a glass rod to make the red mud Disperse again to obtain the second RM dispersion; put the second RM dispersion for 3 minutes, take the upper yellow dispersion, and obtain the RM filter cake by suction filtration, and complete 1 settling separation; the lower solid obtained after standing The liquid mixture was diluted with water, and then the above-mentioned sedimentation and separation treatment steps were repeated, and the sedimentation a...

Embodiment 2

[0089] 1. Preparation of dealkalized red mud

[0090] With embodiment 1.

[0091] 2. Preparation of coupling agent surface modified RM

[0092] With embodiment 1.

[0093] 3. Preparation of epoxy resin composite materials

[0094] 21.7g pulverized aramid fiber (SKF) and 36.6g coupling agent surface modified RM were pre-mixed with a high-speed pulverizer to obtain SKF / RM powder; 96g epoxy resin E-51 was weighed in a high-speed stirring tank, and added For the SKF / RM powder, select a polytetrafluoroethylene ball mill stirring head, control the reaction temperature to 70°C, adjust the stirring speed to 5000rpm, stir at a high speed for 10min, and degas the obtained system in a vacuum oven at 70°C for 10min to obtain dispersion treatment System; add 24.1g curing agent DDM and 0.2g silicone oil as defoamer to the dispersion treatment system, keep the reaction temperature at 70°C, adjust the stirring speed to 5000rpm, react for 10min, and place the obtained system in a vacuum ove...

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Abstract

The invention provides a fiber and red mud co-modified epoxy resin composite material and a preparation method thereof, and belongs to the technical field of composite materials. The red mud subjected to surface modification by the coupling agent is used as a nano-micron composite inorganic filler to modify an epoxy resin matrix, and the crushed fibers are used as a reinforcing material to prepare the epoxy resin composite material, so that the red mud modified epoxy resin has more excellent toughness and strength, and meanwhile, the red mud modified epoxy resin has better toughness and strength. The addition of the coupling agent surface modified red mud also promotes the resin matrix and the fiber reinforced material to generate a tighter interface effect. Therefore, the epoxy resin composite material prepared by the invention has good mechanical properties and tribological properties.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to an epoxy resin composite material co-modified by fibers and red mud and a preparation method thereof. Background technique [0002] Epoxy resin (EP) is a commonly used thermosetting plastic, which has excellent chemical stability, good mechanical properties, high thermal stability, high adhesion and minimal curing shrinkage. With the above excellent properties, epoxy resins are often used in adhesives, coatings, molding compounds for electronic equipment, engineering plastics, composite material substrates and other fields. However, the higher degree of crosslinking also leads to problems such as poor toughness and wear resistance of epoxy resin, and low material hardness. [0003] In order to solve the above problems, methods such as inorganic nanoparticle modification, liquid rubber modification, polyurethane modification, regulation of flexible curing agent, and d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/02C08L77/10C08K7/06C08K9/06C08K7/14C08K11/00C08K9/04
CPCC08L63/00C08K2201/003C08K2201/004C08L77/10C08K7/06C08K9/06C08K7/14C08K11/00C08K9/04
Inventor 裴先强张展程王彦王齐华王廷梅王泽军
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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