Surface polymerization-modified hydrotalcite material and preparation method thereof

A technology of hydrotalcite and modified water, which is applied in chemical instruments and methods, fibrous fillers, inorganic pigment treatment, etc., can solve problems such as easy agglomeration, difficult occurrence, poor compatibility, etc. Capacitance, effect of improving dispersion

Active Publication Date: 2018-02-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The general surface modification method is to graft small molecular substances on the surface, which has poor compatibility with polymers and is prone to agglomeration, which is not conducive to the performance of hydrotalcite in polymers.
There are also modification methods that directly carry out in-situ polymerization to obtain corresponding LDHs / polymer composites, but some polymerization reactions are difficult or even difficult to occur, and the application fields are limited

Method used

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  • Surface polymerization-modified hydrotalcite material and preparation method thereof
  • Surface polymerization-modified hydrotalcite material and preparation method thereof
  • Surface polymerization-modified hydrotalcite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Step A: Accurately weigh 0.01mol (2.5641g) of Mg(NO 3 ) 2 ·6H 2 O, 0.005mol (1.8756g) of Al(NO 3 ) 3 9H 2 O and 0.05mol (3g) of CO(NH 2 ) 2, dissolved in 80ml deionized water. Using the urea method, the solution was transferred to a polytetrafluoroethylene lining, placed in an oven, and crystallized at 130°C for 24 hours. The product was centrifuged to separate the filter cake and used to remove CO 2 The filtrate was washed with deionized water until pH ≈ 7, and dried for 12 hours. The obtained hydrotalcite precursor was recorded as LDHs.

[0031] Step B: Take 3.5g of LDHs precursor powder, add 150ml of cyclohexane, ultrasonicate for 10 minutes, and then transfer to a clean 250ml three-necked bottle. Weigh 0.105g of KH-550 and 0.045g of KH-570, dissolve them in 2ml of cyclohexane, and sonicate for 5 minutes. Under rapid stirring, the above solution was added to the LDHs precursor slurry. Heating to 75°C and reacting for 8 hours to obtain a surface-organized h...

Embodiment 2

[0038] Step A: Accurately weigh 0.01mol (2.5641g) of Mg(NO 3 ) 2 ·6H 2 O, 0.005mol (1.8756g) of Al(NO 3 ) 3 9H 2 O and 0.05mol (3g) of CO(NH 2 ) 2 , dissolved in 80ml deionized water. Using the urea method, the solution was transferred to a polytetrafluoroethylene lining, placed in an oven, and crystallized at 130°C for 24 hours. The product was centrifuged to separate the filter cake and used to remove CO 2 The filtrate was washed with deionized water until pH ≈ 7, and dried for 12 hours. The obtained hydrotalcite precursor was recorded as LDHs.

[0039] Step B: Take 3.5g of LDHs precursor powder, add 150ml of cyclohexane, ultrasonicate for 10 minutes, and then transfer to a clean 250ml three-necked bottle. Weigh 0.105g of KH-550 and 0.045g of KH-570, dissolve them in 2ml of cyclohexane, and sonicate for 5 minutes. Under rapid stirring, the above solution was added to the LDHs precursor slurry. Heating to 75°C and reacting for 8 hours to obtain a surface-organized ...

Embodiment 3

[0042] Step A: Accurately weigh 0.01mol (2.5641g) of Mg(NO 3 ) 2 ·6H 2 O, 0.005mol (1.8756g) of Al(NO 3 ) 3 9H 2 O and 0.05mol (3g) of CO(NH 2 ) 2 , dissolved in 80ml deionized water. Using the urea method, the solution was transferred to a polytetrafluoroethylene lining, placed in an oven, and crystallized at 130°C for 24 hours. The product was centrifuged to separate the filter cake and used to remove CO 2 The filtrate was washed with deionized water until pH ≈ 7, and dried for 12 hours. The obtained hydrotalcite precursor was recorded as LDHs.

[0043] Step B: Take 2g of the precursor powder of LDHs, add 100ml of deionized water and ultrasonic for 10 minutes, then transfer to a clean 250ml four-neck bottle. Under nitrogen protection, weigh 0.4 g of acrylic acid, and add it into the LDHs slurry under rapid stirring. Raise the temperature to 70°C, add 0.1g of cerium ammonium nitrate, and continue the reaction for 12 hours to obtain a surface polymerization-modified ...

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Abstract

The invention provides a surface polymerization-modified hydrotalcite material and a preparation method thereof. Hydrotalcite is used as a raw material, and the surface of the hydrotalcite is organized by directly using hydroxyl on the surface of the hydrotalcite or micromolecules such as a silane coupling agent, and then an allyl monomer is added for surface grafting polymerization, so that a layer of polymer 'film' with relatively low polymerization degree is formed on the surface of the hydrotalcite to realize modification of the surface of the hydrotalcite and improve the compatibility ofthe hydrotalcite and the polymer; the dispersivity of the hydrotalcite in polymer resin can be improved. The surface polymerization-modified hydrotalcite is added into PE (polyethylene) according to an adding amount of 1 weight percent, so that the dispersivity is obviously improved; meanwhile, the hydrotalcite is dispersed in PE in the form of a single particle. The modification method is applicable to the hydrotalcite prepared by various methods; moreover, the obtained polymerization-modified hydrotalcite can be applicable to various types of polymer resin, so that the application performance is effectively improved.

Description

technical field [0001] The invention relates to the technical field of nanocomposite materials, in particular, it provides a surface polymerization modified hydrotalcite material and a preparation method thereof. The functional material is added to high polymer materials such as polyethylene to improve the hydrotalcite in polymer The role of dispersion. Background technique [0002] Layered double hydroxides (LDHs for short), also known as hydrotalcite. Hydrotalcite is an anionic clay with a layered structure. Its simple preparation, pure product, low cost and its excellent performance make it have great potential in the development of new materials. The organic / inorganic nanocomposite material made by compounding it with polymers not only overcomes the disadvantages of difficult processing of inorganic particles, low strength and poor stability of organic polymers, but also combines the advantages of organic and inorganic substances. Therefore, it has become a hot spot of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K13/06C08K9/10C08K9/06C08K9/02C08K3/22C08L23/06C09C1/40C09C3/10C09C3/12C09C3/06
CPCC08K3/22C08K9/02C08K9/06C08K9/10C08K13/06C08K2201/011C09C1/407C09C3/006C09C3/06C09C3/10C09C3/12C08L23/06
Inventor 林彦军童丹李凯涛杨阳
Owner BEIJING UNIV OF CHEM TECH
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