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Supramolecular structure phenolphtalein or its analog-inserted UV blocking material and preparation method thereof

A technology of molecular structure and UV blocking, applied in the direction of building insulation materials, building components, building structures, etc., can solve the problems of performance degradation, viscosity increase, softening point increase, etc., to improve the absorption strength and anti-ultraviolet aging ability , The effect of enhanced absorption

Active Publication Date: 2015-04-08
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Environmental pollution has brought about a substantial increase in ultraviolet rays. The photochemical and biological effects produced by ultraviolet rays are very significant, causing asphalt and other polymer materials to age, resulting in reduced performance, increased viscosity, and increased softening point. Therefore, it is necessary to Research on efficient anti-ultraviolet additives

Method used

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  • Supramolecular structure phenolphtalein or its analog-inserted UV blocking material and preparation method thereof
  • Supramolecular structure phenolphtalein or its analog-inserted UV blocking material and preparation method thereof
  • Supramolecular structure phenolphtalein or its analog-inserted UV blocking material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step A: 30.72g (0.12mol) of solid Mg(NO 3 ) 2 ·6H 2 O and 22.51g (0.06mol) of solid Al(NO 3 ) 3 9H 2 O, soluble in removing CO 2 150mL of mixed salt solution was prepared in deionized water; 14.4g of NaOH was weighed and dissolved in 2 Prepare 150mL alkali solution in deionized water; put the two solutions into a rotating membrane reactor at the same flow rate at room temperature to quickly nucleate, transfer the obtained slurry to a 500mL flask, crystallize at 80°C for 8 hours, and centrifuge to wash until The pH is about 7, dried at 60°C for 12 hours to obtain the precursor of nitrate intercalated magnesium aluminum hydrotalcite, whose structural formula is Mg 0.64 al 0.36 (OH) 2 (NO 3 - ) 0.36 0.9H 2 O;

[0025] Get above-mentioned product 22.81g (0.01molNO 3 —) in a three-necked flask with CO removal 2 Ultrasonic dispersion in deionized water, prepared into 75mL suspension;

[0026] Step B: Weigh 6.36g (0.02mol) of phenolphthalein and dissolve it in ...

Embodiment 2

[0032] Step A: Prepare the precursor suspension of nitrate intercalated magnesium aluminum hydrotalcite, the method is the same as step A in Example 1;

[0033] Step B: Weigh 3.18g (0.01mol) of phenolphthalein and dissolve it in 75mL to remove CO 2Add about 0.03g of NaOH to the deionized water under rapid stirring conditions to adjust the pH of the solution to 11;

[0034] Step C: Under the protection of nitrogen, add the solution of step B to the suspension of step A and mix quickly, the molar ratio of nitrate and phenolphthalein in the precursor of nitrate intercalation magnesium aluminum hydrotalcite is 1:1, crystallize at 90 °C for 8 hours, centrifuge, and remove CO 2 Wash with deionized water until the pH is about 7, and dry at 60°C for 12 hours to obtain a supramolecular structure phenolphthalein intercalated UV blocking material, which is denoted as MgAl-PPN-LDHs.

[0035] The obtained product is characterized by XRD, IR, elemental analysis, etc., and its chemical for...

Embodiment 3

[0038] Step A: Prepare the precursor suspension of nitrate intercalated magnesium aluminum hydrotalcite, the method is the same as step A in Example 1;

[0039] Step B: Weigh 12.73g (0.04mol) of phenolphthalein and dissolve it in 75mL to remove CO 2 Add about 0.03g of NaOH to the deionized water under rapid stirring conditions to adjust the pH of the solution to 11.5;

[0040] Step C: Under the protection of nitrogen, add the solution of step B to the suspension of step A and mix quickly. The molar ratio of nitrate and phenolphthalein in the precursor of nitrate intercalated magnesium aluminum hydrotalcite is 1:4, crystallize at 95°C for 6 hours, centrifuge, and remove CO 2 Wash with deionized water until the pH is about 7, and dry at 60°C for 12 hours to obtain a supramolecular structure phenolphthalein intercalated UV blocking material, which is denoted as MgAl-PPN-LDHs.

[0041] The obtained product is characterized by XRD, IR, elemental analysis, etc., and its chemical f...

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Abstract

The invention discloses a supramolecular structure phenolphtalein or its analog-inserted UV blocking material and a preparation method thereof. The preparation method comprises that nitrate-inserted magnesium-aluminum hydrotalcite is used as a precursor, and phenolphtalein or its analog is inserted between layers of the nitrate-inserted magnesium-aluminum hydrotalcite precursor by an ion exchange method so that the phenolphtalein or its analog-inserted magnesium-aluminum hydrotalcite with a good crystal structure and excellent performances is assembled. The supramolecular structure phenolphtalein or its analog-inserted UV blocking material has a 220-400nm band UV blocking rate higher than 95%, has excellent UV blocking performances, widens a UV blocking agent use range, can be used as additives of polymers such as asphalt, plastic and rubber, greatly improves UV-caused ageing resistance and prolongs a service life.

Description

Technical field: [0001] The invention belongs to the technical field of inorganic functional materials, and in particular relates to a supramolecular structure phenolphthalein or its analog intercalated ultraviolet blocking material and a preparation method thereof. Background technique: [0002] Environmental pollution has brought about a substantial increase in ultraviolet rays. The photochemical and biological effects produced by ultraviolet rays are very significant, causing asphalt and other polymer materials to age, resulting in reduced performance, increased viscosity, and increased softening point. Therefore, it is necessary to Research on high-efficiency anti-UV additives. The English name of phenolphthalein is phenolphthalein, abbreviated as PPN. It has good UV blocking performance in the 220-310nm band, and its appearance is pure white powder. It is insoluble in water at room temperature and soluble in NaOH solution. It is a commonly used solution pH indicator. ...

Claims

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Application Information

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IPC IPC(8): C08K9/04C08K9/02C08K3/26C08L95/00C08L101/00C08L21/00
Inventor 林彦军郭晋升李凯涛饶治
Owner BEIJING UNIV OF CHEM TECH
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