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

A nano-sheet, polymer technology can solve the problems of difficult control, low output and high cost, and achieve the effects of less influencing factors on polymerization, widening the selection range, and easy control of polymerization conditions.

Inactive Publication Date: 2005-05-18
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
  • Preparing nano sheet type polymer using LDHs as template and its preparing method

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Experimental program
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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) The Mg / Al molar concentration ratio is equal to 2 and 187.5ml of nitrogen-purified deionized water is used to make a salt solution.

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

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

[0030] D. Under the protection of nitrogen, add the solutions obtained in steps B and C into a four-neck flask, and then add the mixed salt solution obtained in step A into the four-neck flask under vigorous stirring, and add dropwise to pH= Stop at 10 o'clock, crystallize at 50°C for 10 hours, then filter, wash with water to pH less than 8, and dry at 65°C for 24 hours to obtain the template—the hydrotalcite LDHs-SS with the interlayer guest being the monomeric SSS intercalated an...

Embodiment 2

[0036] A. Mg(NO 3 ) 2 (0.3mol, 76.8g), Al(NO 3 ) 3 (0.15 mol, 56.5 g) was used to prepare a salt solution with 250 ml of nitrogen purified deionized water.

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

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

[0039] D. Under the protection of nitrogen, add the solutions obtained in step B and step C into a four-neck flask, and add the mixed salt solution of step A into the four-neck flask dropwise under vigorous stirring, and add dropwise to pH=9.5 When stopped, crystallized at 65°C for 40h, filtered, washed with water to pH less than 8, and dried at 70°C for 20h to obtain LDHs-AA template. XRD and IR are used to prove that the monomer has been intercalated and assembled into the interlayer of hydrotalcite. The ...

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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 polymers by using LDHs as a template and a preparation method thereof. Background technique [0003] The literature Supp SI, Lebonheur V, et al. Supramolecular materials: Self-organized nanostructure. Science, 1997, 276, 384-389 pointed out that nano-structured polymer materials have advantages in magnetic, electrical, optical, catalysis and chemical sensing. The broad application prospects have therefore aroused people's great attention and set off a research boom. At present, there are many methods for preparing nano-polymer materials, such as molecular self-assembly, mechanical pulverization, organic synthesis, microemulsion polymerization, template polymerization, etc. Among them, the more effective method to control the morphology and particle size of the polymer is the microemulsion polymerization method. And template method. The microemulsion polymerization method is to control the size of the "micr...

Claims

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Application Information

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Patent Type & Authority Applications(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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