Compound modification method for clay

A compound modification and clay technology, applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., to achieve the effect of increasing layer spacing, improving modification effect, and reducing surface energy

Inactive Publication Date: 2013-01-16
南通南京大学材料工程技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the clay composite modification method that combines the solid-phase modification of silane coupling agent with the liquid-phase modification of long-chain alkyl ammonium salt has not been reported.

Method used

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  • Compound modification method for clay
  • Compound modification method for clay
  • Compound modification method for clay

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Dissolve 0.5g of γ-glycidyl etheroxypropyltrimethoxysilane in 20ml of water and methanol mixture, and keep the ratio of alcohol to water at 1:45. It was then stirred for 50 minutes on a magnetic stirrer. The clay is washed in water to skim off the impurities in the upper layer, and dried at 120°C. Then it is ground and passed through a 100-mesh sieve. Add 50 g of attapulgite into the stirring furnace, keep the stirring furnace at 60° C. and stir at a high speed, and the stirring rate of the stirring furnace is 350 rpm. Spray the above mixture into the clay, control the spraying time to about 2 minutes, and continue stirring for half an hour at 60°C. Then it was poured into a glass and heat-treated at 160°C for 2 hours. The above product was mixed with 0.5wt.% cetyltrimethylammonium bromide solution in an amount of 100ml, and a little acetic acid was added to adjust the pH to 3. Stir at 80°C for 2 hours. Then suction filter 5 times, heat treatment at 160°C for 5 hou...

Embodiment 2

[0022] Dissolve 1g of γ-(methacryloyloxy)propyltrimethoxysilane in 20ml of water and ethanol mixture, and keep the ratio of alcohol to water at 1:9. Then stir for 10 minutes on a magnetic stirrer. The clay is washed in water to skim off the impurities in the upper layer, and dried at 120°C. Then it is ground and passed through a 200-mesh sieve. Add 100 g of kaolin into the stirring furnace, keep the stirring furnace at 80° C. and the stirring rate of the high-speed stirring stirring furnace at 2000 rpm. , Spray the above mixture into the clay, control the spraying time to about 5 minutes at 80°C, and continue to stir for half an hour. Then it was poured into a glass and heat-treated at 120° C. for 1 hour. The above product was mixed with cetyltrimethylammonium bromide solution with a concentration of 0.25wt.% and an amount of 200ml, and a little acetic acid was added to adjust the pH to 3. Stir at 60°C for 2 hours. Then suction filter 3 times, heat treatment at 120°C for ...

Embodiment 3

[0024] Dissolve 0.5g of γ-glycidyloxypropyltrimethoxysilane and 0.5g of γ-mercaptopropyltriethoxysilane in 20ml of water and methanol mixture, and keep the ratio of alcohol to water at 1:5. It was then stirred for 25 minutes on a magnetic stirrer. The clay is washed in water to skim off the impurities in the upper layer, and dried at 120°C. Then it is ground and passed through a 250-mesh sieve. Add 20 g of attapulgite into the stirring furnace, keep the stirring furnace at 10° C. and stir at a high speed, and the stirring rate of the stirring furnace is 350 rpm. Spray the above mixture into the clay, the spraying time is controlled at about 10 minutes, and the stirring is continued for half an hour at 10°C. It was then poured into a glass and heat-treated at 80°C for 3 hours. The above product was mixed with a dodecyltrimethylammonium chloride solution with a concentration of 2wt.% and an amount of 25ml, and a little acetic acid was added to adjust the pH to 5. Stir at 80°...

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Abstract

The invention relates to a compound modification method for clay, which comprises the following steps: dissolving 0.5-2g of silane coupling agent in a certain amount of alcohol-water mixture, and stirring for a certain time on a magnetic stirrer; adding a certain amount of clay into a stirring furnace, performing high-speed stirring at a certain temperature, and meanwhile, adding the alcohol-water mixture into the clay within a certain time; after the alcohol-water mixture is added, continuing to stir for 0.5 hour, pouring out, and performing heat treatment at 80-200 DEG C for 1-3 hours; and mixing the product obtained in the previous step with a certain amount of long-chain alkyl ammonium salt water solution, adding a small amount of acetic acid to regulate the pH value to 2-5, stirring at a certain temperature for a certain time, repeatedly performing vacuum filtration 2-5 times, and performing heat treatment at 80-200 DEG C for 2-5 hours. Secondary modification takes full advantages of the synergic modification effects of the silane coupling agent and the long-chain alkyl ammonium salt, enlarges the molecular layer interval of the clay, increases the affinity of the clay to polymer and widens the application range of the clay.

Description

technical field [0001] The invention relates to a clay composite modification method combining the solid-phase modification of silane coupling agent and the liquid-phase modification of long-chain alkyl ammonium salt, which has great potential in the fields of deep processing of clay minerals, polymer-based clay nanocomposites and the like. Broad application prospects. Background technique [0002] With the development of society, people's demand for materials is increasing day by day, and higher requirements are put forward for the performance of materials. Due to the combination of the properties of organic and inorganic materials, polymer matrix composites have attracted much attention in the fields of basic research and engineering applications. Inorganic fillers are one of the important components of composite materials, which can endow materials with a series of new properties, and can also reduce the amount of resin used, effectively reducing the production cost of c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/40
Inventor 陆洪彬高扬之唐伟孟祥康周剑峰
Owner 南通南京大学材料工程技术研究院
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