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Nano bentonite for plastic modification and preparation method thereof

A technology of nano-bentonite and bentonite, which is applied in the field of polymer material modification, can solve problems such as excessive surface energy of nano-powders, weak interfacial bonding, and poor material properties, so as to achieve favorable mechanical properties, mechanical properties, phase good capacitive effect

Inactive Publication Date: 2010-08-18
苏州兰特纳米材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, as a nano-scale inorganic powder, the problem that has been difficult to solve is that the surface energy of the nano-powder is too large, it is easy to agglomerate, it is not easy to disperse, and it cannot even be used; the compatibility between bentonite and organic polymer materials Very poor, the interface is not firmly bonded after compounding, and the material performance is very poor

Method used

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  • Nano bentonite for plastic modification and preparation method thereof
  • Nano bentonite for plastic modification and preparation method thereof
  • Nano bentonite for plastic modification and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0059] See attached figure 2 As shown, the preparation method is as follows:

[0060] (1) Purification and acidification whitening

[0061] Slowly place 100kg of natural bentonite in a container that has been added with 1000kg of water, stir at high speed for 1.5h, and let it stand for 6h to remove the coarse sand in the lower layer. Then add 3kg of sodium hexametaphosphate, add hydrochloric acid, control the pH of the system to be 6, after it is stirred at a high speed, further separate the detrital minerals (feldspar, carbonate, etc.) with finer particle size, and repeat the operation 2 times , to obtain bentonite slurry or suspension, which is dried and ground through a 1000-mesh sieve to obtain purified soil.

[0062] (2) Sodium treatment

[0063] Take by weighing 100kg the purified soil that above-mentioned step (1) makes, slowly pour in the container that fills 1000kg water, add the Na of 20kg 2 CO 3 , at a temperature of 70° C., reacted for 4 hours, and stirred at...

Embodiment 2

[0071] See attached figure 2 As shown, the preparation method is as follows:

[0072] (1) Purification and acidification whitening

[0073] Slowly place 100kg of natural bentonite in a container that has been added with 1000kg of water, stir at high speed for 2 hours, and let it stand for 8 hours to remove the coarse sand in the lower layer. Then add the sodium hexametaphosphate of 2.5kg, add hydrochloric acid, the pH value of control system is 5, after its high-speed stirring, further separate the detritus mineral (feldspar, carbonate etc.) with finer particle size, repeat operation 3 Once, the bentonite slurry or suspension is obtained, dried and ground through a 1000-mesh sieve to obtain purified soil.

[0074] (2) Sodium treatment

[0075] Take by weighing 100kg the purified soil that above-mentioned step (1) makes, slowly pour in the container that fills 1000kg water, add the Na of 25kg 2 SO 4 , at a temperature of 70° C., reacted for 5 hours, and stirred at a high ...

Embodiment 3

[0083] See attached figure 2 As shown, the preparation method is as follows:

[0084] (1) Purification and acidification whitening

[0085] Slowly place 100kg of natural bentonite in a container that has been added with 1000kg of water, stir at high speed for 2 hours, and let it stand for 8 hours to remove the coarse sand in the lower layer. Then add the sodium hexametaphosphate of 3.5kg, add nitric acid, the pH value of control system is 4, after its high-speed stirring, further separate the detritus mineral (feldspar, carbonate etc.) with finer particle size, repeat operation 4 Once, the bentonite slurry or suspension is obtained, dried and ground through a 1000-mesh sieve to obtain purified soil.

[0086] (2) Sodium treatment

[0087] Weigh 100kg of the purified soil prepared by the above step (1), slowly pour it into a container filled with 1000kg of water, add 35kg of sodium chloride, react at a temperature of 70°C for 5 hours, and stir at a high speed. The sodium-ba...

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Abstract

The invention relates to nano bentonite for plastic modification and a preparation method thereof, which is characterized in that a nano bentonite product for plastic modification is obtained through the special processing of natural bentonite in five steps of whitening through purification and acidification, sodium activation, intercalation organization, surface finishing and coating. The purity of the nano bentonite reaches more than 95 percent, the whiteness reaches more than 80 degrees, the interlayer spacing after intercalation organization reaches more than 2.7nm, and the thermal weight loss at the temperature of 280 DEG C is below 3 percent. The nano bentonite has good compatibility with a high molecular material (mainly a plastic material), is more beneficial to keeping mechanical performance, has good dispersive property, is easy to process, can perform the action of heterogeneous nucleation for crystallized plastics, improves the mechanical performance thereof, is used for plastic flame retardant modification, can reduce the addition of a flame retardant by 30 percent, and not only is beneficial to keeping the mechanical performance, but also can lower the cost.

Description

technical field [0001] The invention relates to the field of modification of polymer materials (mainly plastic materials), in particular to nano-bentonite for plastic modification and a preparation method thereof. The nano-bentonite can be used for flame retardancy, toughening and strengthening modification of plastic materials, especially for crystalline plastics, and the modified flame retardancy and various mechanical properties are the most ideal. Background technique [0002] Since the mid-1980s, with the rise of nanotechnology, nanomaterials (1-100nm) have shown many peculiar properties due to their size effect and interface effect, which have an important impact on the performance of materials, and have gradually been used in electronics, computers, etc. , aerospace, biology, environmental protection, chemical industry, medicine and other fields have been widely used. In particular, the preparation of interlayer nanocomposites with nanometer-sized inorganic layered s...

Claims

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Application Information

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IPC IPC(8): C08K9/10C08K9/02C08K9/04C08K9/06C08K3/34
Inventor 刘曙光孟繁茂李宝荣张冬
Owner 苏州兰特纳米材料科技有限公司
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