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Preparation method of modified fly ash microbead rubber and plastic filler

A technology of fly ash microbeads and fly ash, which is applied in the field of chemical fillers, can solve the problems of unable to meet the technical requirements of fly ash, limited filling amount, poor compatibility, etc., and achieve good effect, large filling amount, and compatibility good sex effect

Inactive Publication Date: 2012-02-08
淮南市金源粉煤灰有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its smooth surface and poor compatibility with the polymer matrix, the interface between the fly ash and the matrix may become the weak link of the composite material. The inherent defects of the fly ash itself restrict its use in the polymer The application of fly ash can not meet the technical requirements of rubber and plastic filler, and the filling amount is also greatly restricted.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0008] Example 1. In a fluidized bed, the fly ash, which has been screened to remove iron beads and carbon particles, is mixed with an atomized hydrofluoric acid solution with a concentration of 47% for corrosion treatment: the amount of hydrofluoric acid solution is 10 mL / kg of pulverized coal Ash, mixing time is 5min, reaction temperature is 80℃. After aging for 2 days, adjust the pH to 13 with sodium hydroxide, and then react with 3.5% calcium hydroxide and 200% water by weight of fly ash in a fluidized bed at a temperature of 60°C, react for 0.5 hours, and introduce carbon dioxide Adjust the PH value from 7 to 8.4. Finally, when nanoparticles are formed on the surface of fly ash, nano-modification is performed, and after the hydrophobic treatment is grafted with a silane coupling agent of 0.3% by weight of fly ash, the modified fly ash microbead rubber and plastic filler is obtained.

Embodiment 2

[0009] Example 2. In a fluidized bed, the fly ash, which has been screened to remove iron beads and carbon particles, is mixed with an atomized hydrofluoric acid solution with a concentration of 40% for corrosion treatment: the amount of hydrofluoric acid solution is 15mL / kg of powdered coal Ash, mixing time 8min, reaction temperature 65℃. After aging for 2 days, adjust the pH to 13.2 with sodium hydroxide, then use 40% calcium hydroxide by weight of fly ash and 3000% water for calcification in the reactor at a temperature of 70°C and react for 45 minutes. The adjusted pH of carbon dioxide is 7.5. After filtering, drying, and finally, when nano particles are formed on the surface of fly ash, nano-modification is carried out. After 0.45% by weight of fly ash is grafted with titanate coupling agent for hydrophobic treatment, modified fly ash is obtained. Microbead rubber and plastic packing.

Embodiment 3

[0010] Example 3. In a fluidized bed, the fly ash, which has been screened to remove iron beads and carbon particles, is mixed with an atomized hydrofluoric acid solution with a concentration of 30% for corrosion treatment: the amount of hydrofluoric acid solution is 20mL / kg of pulverized coal Ash, mixing time is 10min, reaction temperature is 50℃. After aging for 2 days, adjust the pH to 13.4 with sodium hydroxide, then use 45% calcium hydroxide by weight of fly ash and 4000% calcium hydroxide in the reactor for calcification, the temperature is 90℃, the reaction is 45 minutes, and carbon dioxide is introduced. Adjust the PH value to 7.5. After filtering, drying, and finally, nano-modification is performed when nanoparticles are formed on the surface of fly ash, and the modified fly ash is obtained by grafting hydrophobic treatment with a titanate coupling agent of 0.6% by weight of fly ash. Microbead rubber and plastic packing.

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Abstract

The invention discloses a preparation method of modified fly ash microbead rubber and plastic filler, which belongs to the technical field of chemical filler. Its purpose is to provide a kind of modified fly ash microbead rubber that can replace light calcium carbonate filled in rubber and plastic products by corroding and chemically modifying the surface of waste fly ash as raw material. Preparation method of plastic filler. The key points of the technology are: use hydrofluoric acid as an etchant to corrode the surface of the fly ash to form new surfaces and active points; then activate with an activator, nano-modify, couple agent grafted hydrophobic treatment, etc., to obtain Fly ash microbead rubber filler. Its indicators are superior to light calcium carbonate: good reinforcement performance, aging resistance, corrosion resistance, and good compatibility with polymer matrix. It is used to replace light calcium carbonate and filled in rubber and plastic products, which fully meets the technical requirements of rubber and plastic fillers. It not only has a large filling amount and good effect, but also has a simple preparation method and low production cost.

Description

technical field [0001] The invention relates to a preparation method of modified fly ash microbead rubber and plastic filler, which belongs to the technical field of chemical filler. Background technique [0002] Fly ash is a solid waste formed from fine dust produced by coal-fired power plants. The quantity is large, and improper disposal will cause pollution. The harmful substances in it will also cause harm to human body and organisms, and it will also occupy a large amount of land. The chemical composition of fly ash is SiO 2 、Al 2 o 3 Mainly, because of its physical activity and chemical activity (potential volcanic ash activity), it can be exploited and utilized as a resource. As a resource, fly ash has high use value and is indispensable for some building materials and products. These facts have been recognized by more and more people. my country's coal resources are very rich, and coal-fired power generation will be the main energy source in my country for a lon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/00
Inventor 高士敏杨开怀
Owner 淮南市金源粉煤灰有限责任公司
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