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Preparing nano sheet type polymer using LDHs as template and its preparing method

A technology of nano flakes and polymers, applied in the field of hydrotalcite, which can solve the problems of difficult control, low output, high cost, etc., and achieve the effects of less polymerization influencing factors, widening the selection range, and easy control of polymerization conditions

Inactive Publication Date: 2007-05-30
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The microemulsion polymerization method is to control the particle size of the polymer by controlling the size of the "micro pool" in the microemulsion droplet, but the preparation of nanometer polymers by the microemulsion polymerization method requires a large amount of surfactants, the cost is high, and due to the amount of water added Too little, low yield, hard to control

Method used

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  • Preparing nano sheet type polymer using LDHs as template and its preparing method
  • Preparing nano sheet type polymer using LDHs as template and its preparing method

Examples

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Effect test

Embodiment 1

[0027] A. Mg(NO 3 ) 2 (0.15mol, 38.46g), Al(NO 3 ) 3 (0.075mol, 28.13g) was equal to 2 with 187.5ml nitrogen purified deionized water according to the Mg / Al molar concentration ratio to form a salt solution.

[0028] B. NaOH (0.42mol, 17.28g) was mixed with 150ml of nitrogen-purified deionized water to form an alkaline solution.

[0029] C. 0.084 mol (15.45 g) monomer sodium 4-vinylbenzene sulfonate (sodium p-styrene sulfonate is abbreviated as SSS) was mixed with 187.5 ml nitrogen-purified deionized water to form a solution.

[0030] D. Under the protection of nitrogen, add the solution obtained in step B and step C into the four-necked flask, then add the mixed salt solution obtained in step A dropwise into the four-necked flask under vigorous stirring, until pH = Stop at 10 o'clock, crystallize at 50°C for 10h, then filter, wash with water until the pH is less than 8, and dry at 65°C for 24h to obtain the template-hydrotalcite LDHs-SS whose interlayer guest is the inter...

Embodiment 2

[0036] A. Mg(NO 3 ) 2 (0.3mol, 76.8g), Al(NO 3 ) 3 (0.15mol, 56.5g) was prepared as a saline solution with 250ml of nitrogen-purified deionized water.

[0037] B. NaOH (0.9mol, 36g) was prepared as an alkaline solution with 375ml of nitrogen-purified deionized water.

[0038] C. Dissolve 32g NaOH in 350ml deionized water, and dissolve 55ml CH 2 =CHCOOH (acrylic acid abbreviated as AA) was added dropwise to the solution to adjust the pH to 7 to prepare a 2M AANa solution.

[0039] D. Under the protection of nitrogen, add the solution obtained in step B and step C into the four-necked flask, and add the mixed salt solution of step A into the four-necked flask under vigorous stirring conditions, and add dropwise to pH=9.5 stop at 65°C for 40h, filter, wash with water until the pH is less than 8, and dry at 70°C for 20h to obtain the LDHs-AA template. Characterization methods such as XRD and IR prove that the monomer has been intercalated into the interlayer of hydrotalcite....

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Abstract

The present invention introduces one nano sheet polymer prepared with LDHs as template and its preparation process. The present invention utilizes the interlayer space as the monomer polymerizing space to introduce monomer into the LDHs space to obtain LDHs-monomer. The LDHs-monomer is then made to produce polymerization reaction to obtain LDHs with interlayer polymer, or LDHs-polymer. The polymer is separated from interlayer of hydrotalcite. The said process has easily controlled polymerization condition, less polymerization affecting factors, nano size and sheet structure of the prepared polymer and other features. The polymer may find its wide application in mechanical, optical, electrical, magnetic and many other fields.

Description

[0001] Field [0002] The invention relates to the preparation of nano sheet polymer and its preparation method by taking composite double metal hydroxide (commonly known as hydrotalcite; it can be represented by LDHs) as a template. Background technique [0003] The literature Supp S I, Lebonheur V, et al. Supramolecular materials: Self-organized nanostructure. Science, 1997, 276, 384-389 pointed out that nanostructured polymer materials have excellent properties in magnetism, electricity, optics, catalysis and chemical sensing. It has broad application prospects, so it has aroused people's great attention and set off an upsurge of research. At present, there are many methods for the preparation of nano-polymer materials, such as molecular self-assembly, mechanical pulverization, organic synthesis, microemulsion polymerization, template polymerization, etc. Among them, the more effective method for controlling the morphology and particle size of polymers is the microemulsion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F2/01
Inventor 段雪王戈王治强司丽春
Owner BEIJING UNIV OF CHEM TECH
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