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Surface polymerization modified hydrotalcite material and preparation method thereof

A technology for modifying water and hydrotalcite, which can be used in fibrous fillers, dyed organosilicon compound treatment, dyed polymer organic compound treatment, etc. It can solve application limitations, prone to agglomeration, poor compatibility between hydrotalcite and polymers problem, to achieve the effect of improving dispersibility and improving compatibility

Active Publication Date: 2020-12-22
安庆北化大科技园有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional surface modification method is to graft small molecular substances on the surface, but the compatibility between the modified hydrotalcite and the polymer is still poor, and it is prone to agglomeration, which is not conducive to the performance of the hydrotalcite in the polymer.
There are also other methods such as direct in-situ polymerization to obtain corresponding LDHs / polymer composites, but the application is greatly limited by the difficulty of polymerization of different polymers.

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

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Embodiment 1

[0037] This embodiment discloses a method for preparing a surface polymerization modified hydrotalcite material, comprising the following steps:

[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 Wash with deionized water until the filtrate pH = 7, and dry for 12 hours to obtain the hydrotalcite precursor, which is denoted as LDHs. urea means urea, the same below.

[0039] Step B: Take 3.5g of LDHs precursor powder, add 150mL of cyclohexane, and then sonicate for 10 minutes, then transfer to a clean 250mL three-neck flask. Weigh 0.175g of KH-570 (Sinopharm Chemical Reagent Co., Ltd.) and dissolve it in 2mL o...

Embodiment 2

[0047] This embodiment discloses a method for preparing a surface polymerization modified hydrotalcite material, comprising the following steps:

[0048] 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 the pH of the filtrate was 7, and dried for 12 hours. The obtained hydrotalcite precursor was recorded as LDHs.

[0049] Step B: Take 3.5g of LDHs precursor powder, add 150mL of cyclohexane, and then sonicate for 10 minutes, then transfer to a clean 250mL three-neck flask. Weigh 0.175g of KH-570 and dissolve it in 2mL of cyclohexane, sonicate for 5 minutes to obtain ...

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Abstract

The invention discloses a method for preparing a surface polymerization-modified hydrotalcite material, which comprises the following steps: preparing a mixed solution in deionized water in which soluble divalent metal salts, soluble trivalent metal salts and urea are dissolved, crystallizing, and washing To neutrality, dry to obtain a hydrotalcite precursor; the hydrotalcite precursor is dispersed in cyclohexane to obtain a suspension; add a silane coupling agent to the suspension, and after crystallization, wash and dry to obtain a surface-organized Hydrotalcite: Under the protection of nitrogen, disperse the surface-organized hydrotalcite in a mixed solution of ethanol and deionized water, add vinyl monomers, then add polyvinylpyrrolidone and azobisisobutyronitrile, after crystallization, Wash and dry to obtain the product. The invention also discloses a surface polymerization modified hydrotalcite material. The invention has the advantages of improving the compatibility between the hydrotalcite and the polymer matrix and improving the dispersibility of the nano particles in the polymer matrix.

Description

technical field [0001] The invention belongs to the technical field of inorganic functional materials, and in particular relates to a surface polymerization modified hydrotalcite material and a preparation method thereof. Background technique [0002] Layered double hydroxides (LDHs for short), also known as hydrotalcite, is a type of anionic inorganic material with a two-dimensional layered structure. Its preparation is simple, the product is pure, the cost is low and its excellent performance It has great potential in the development of new materials. In particular, it can be used as a polymer material additive to improve the oxidation resistance, thermal stability, light stability, and flame retardancy of composite materials. However, since the surface of the synthetic hydrotalcite has an active group -OH, and the surface energy is large, it is easy to agglomerate. In addition, hydrotalcite is an inorganic material, which has different interfacial properties from polyme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/10C08K9/06C08K7/00C08F112/08C08F120/14C08F2/44C09C1/40C09C3/12C09C3/10
Inventor 林彦军童丹王帅刘闻笛李凯涛
Owner 安庆北化大科技园有限公司