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Single-layer clay stripping liquid and preparation method thereof

A technology of stripping liquid and monolithic layer, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of high comprehensive cost, poor stability and dispersion, cumbersome production operations, etc., and achieve great development potential and Application prospects, excellent dispersibility and stability, effect of superior stability and dispersibility

Inactive Publication Date: 2017-12-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can exfoliate clay, they need to add intercalants and some other substances, which are easy to introduce impurities, and the exfoliation process is complicated and has many repeated steps. More importantly, it is still impossible to effectively obtain a single-layer clay basic unit.
[0005] Therefore, a single-layer clay stripping solution and its preparation method have been developed, which are used to solve the technical solutions for the preparation of clay stripping solutions in the prior art, which have the problems of high energy consumption, easy introduction of impurities, cumbersome production operations, and low degree of clay stripping The inability to effectively obtain monolithic layers, poor stability and dispersion, and high overall cost have become problems to be solved urgently by those skilled in the art

Method used

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preparation example Construction

[0032] In a specific embodiment of the present invention, the preparation method of the single-layer clay stripping liquid has the following steps:

[0033] (1) Stir the nanocellulose with water evenly to a concentration of 5-15mg / LmL, centrifuge at a speed of 4000-6000r / min for 10-20min (the nanofiber solution is adjusted to a solubility of 5mg / mL, and it still appears as a gel When it is in shape, heat it to 60°C and stir at 2000rpm for 10min, after shear thinning, immediately perform centrifugation), take the supernatant to obtain a nanocellulose suspension with a concentration of 3.5-12mg / mL;

[0034] (2) According to the number of dry parts, mix 5-15 parts of nanocellulose suspension with water and stir evenly, add 85-95 parts of clay powder under stirring state, until it is uniform without precipitation, the concentration is 5-15mg / mL of the mixture;

[0035] The mixed liquid is ultrasonically treated (ultrasonic treatment power is 400-1000W, time is 10-40min, and the ...

Embodiment 1

[0038] The preparation of microfibrillated cellulose / single-layer montmorillonite stripping liquid specifically comprises the steps:

[0039] (1) Adjust the microfibrillated cellulose with water to a concentration of 15mg / mL, stir evenly, centrifuge at 4000r / min for 10min, take the supernatant to obtain a suspension of microfibrillated cellulose with a concentration of 12mg / mL liquid;

[0040](2) According to the number of absolute dry parts, mix water and 10 parts of microfibrillated cellulose liquid and stir evenly, add 90 parts of montmorillonite powder under stirring state, until it is uniform without precipitation, and obtain a concentration of 10 mg / mL Mixed solution; after ultrasonic treatment (ultrasonic treatment power is 800W, ultrasonic treatment time is 30min, and the volume of treatment liquid is 100mL); after ultrasonic treatment, it is centrifuged at 5000r / min for 20min, and the supernatant is taken to obtain a concentration of 5.87mg / mL of microfibrillated ce...

Embodiment 2

[0044] The preparation of nano-microcrystalline fiber / single-layer kaolin stripping liquid specifically comprises the following steps:

[0045] (1) Adjust the nano-microcrystalline fiber to a concentration of 5 mg / mL with water. After stirring evenly, it is still gelatinous at this time. Heat it to 60°C and stir at 2000 rpm for 10 minutes. Centrifuge at 6000r / min for 20min, take the supernatant to obtain a nanocrystalline fiber suspension with a concentration of 3.5mg / mL;

[0046] (2) According to the number of dry parts, mix and stir 5 parts of nanocrystalline fiber suspension with water and stir evenly, add 95 parts of kaolin powder under stirring state, until it is uniform without precipitation, and obtain a mixed solution with a concentration of 15 mg / mL; After ultrasonic treatment (the power of ultrasonic treatment is 400W, the time of ultrasonic treatment is 40min, and the volume of treatment liquid is 200mL), after ultrasonic treatment, it is centrifuged at 4000r / min fo...

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Abstract

The invention discloses single-layer clay stripping liquid and a preparation method thereof. The preparation method comprises the following steps: using centrifugally treated nano-crystalline cellulose which has the hydrophilic oleophilic feature, stripping and dispersing clay by using the treated nano-crystalline cellulose, and centrifugally treating to obtain the single-layer clay stripping liquid. The single-layer clay stripping liquid has the excellent stability and dispersity, and does not generate the flocculation and precipitation phenomenon after one month of the storage.

Description

technical field [0001] The invention belongs to the technical field of two-dimensional material preparation, and in particular relates to a single-layer clay stripping liquid and a preparation method thereof. Background technique [0002] Clay is widely distributed in rocks and soils all over the world. As a natural mineral, it is a layered silicate. It has the characteristics of abundant sources, low price, non-toxicity, and stable chemical properties. It is widely used in composite materials, Coatings, catalysis, refractory, ceramics, drug release and other fields. Clay is a layered silicate, the thickness of a single layer does not exceed 1.5nm, and the layers are combined by intermolecular forces. Therefore, its layered structure can be exfoliated into two-dimensional monolithic clay by specific means. The better the dispersibility and peeling effect of the stripping liquid, the more favorable it is to form a network, thereby further enhancing the use effect of the nan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/40
CPCC01B33/40
Inventor 陈港明思逸方志强
Owner SOUTH CHINA UNIV OF TECH