Selective infrared absorption material of aminodiacetic acid intercalation structure and method for preparing same

A technology of aminodiacetic acid and iminodiacetic acid, which is applied in the field of aminodiacetic acid intercalated structure selective external absorption materials and its preparation, can solve the problems of easy decomposition, accelerated destruction of material properties, poor thermal stability of IDAs, etc. Simple, low-cost, easy-to-prepare effects

Inactive Publication Date: 2008-10-22
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, IDAs have poor thermal stability and are easy to decompose at high temperatures, and IDAs themselves are highly acidic and corrosi

Method used

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  • Selective infrared absorption material of aminodiacetic acid intercalation structure and method for preparing same
  • Selective infrared absorption material of aminodiacetic acid intercalation structure and method for preparing same
  • Selective infrared absorption material of aminodiacetic acid intercalation structure and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Step A: 45.0g (0.12mol) of solid Al(NO 3 ) 3 9H 2 O and 61.5g (0.24mol) of solid Mg(NO 3 ) 2 ·6H 2 O dissolves in removing CO 2 300ml of mixed salt solution A was prepared in deionized water; another 28.8g (0.72mol) of solid NaOH was dissolved in 2 300ml of alkaline solution B was prepared in deionized water. Rapidly nucleate the alkali solution and the salt solution in a fully back-mixed rotary liquid film reactor at room temperature, crystallize the obtained slurry at 100°C for 6 hours, and centrifuge to separate the obtained sample until the pH value is close to 7 to obtain hydrotalcite. body filter cake. Take a small amount and dry at 70°C for 24 hours to obtain MgAl-NO 3 -LDHs, its Mg 2+ / Al 3+ =2:1.

[0030] Take 18.9g (0.015mol) of the above filter cake to remove CO 2 Ultrasonic dispersion in deionized water to prepare a 150ml suspension.

[0031] Step B: Weigh 6.0g (0.045mol) of iminodiacetic acid (IDA) and dissolve in 2 100ml solution was prepared...

Embodiment 2

[0048] Step A: MgAl-NO 3 -The preparation of LDHs is the same as in Example 1.

[0049] Take 22.7g (0.015ml) of the above filter cake to remove CO 2 Ultrasonic dispersion in deionized water to prepare a 150ml suspension.

[0050] Step B: Weigh 8.0g (0.045ml) of N-(2-hydroxyethyl)iminodiacetic acid (HIDA) and dissolve in CO 2 150 ml solution was prepared in deionized water, and NaOH was added to adjust its pH value to 4.

[0051] Step C: Under the protection of nitrogen, quickly add the precursor slurry prepared in step A to the solution prepared in step B, crystallize at 100°C for 6 hours, filter, and remove CO with 2 Wash with deionized water until the pH is about 7, and dry at 70°C for 24 hours to obtain MgAl-HIDA-LDHs, an infrared absorbing material with HIDA intercalation structure.

[0052] Use TG / DTA, ICP and elemental analysis methods to analyze and characterize the product, and determine its chemical formula / composition as: Mg 0.604 Al 0.396 (OH) 2 (C 6 h 9 NO...

Embodiment 3

[0054] Step A: MgAl-NO 3 -The preparation of LDHs is the same as in Example 1.

[0055] Take 25.0g (0.015ml) of the above filter cake to remove CO 2 Ultrasonic dispersion in deionized water to prepare a 150ml suspension.

[0056] Step B: Weigh 6.6g (0.045ml) of methyliminodiacetic acid (MIDA) and dissolve in 2 150 ml solution was prepared in deionized water, and NaOH was added to adjust its pH value to 4.

[0057] Step C: Under the protection of nitrogen, quickly add the precursor slurry prepared in step A to the solution prepared in step B, crystallize at 100°C for 6 hours, filter, and remove CO with 2 Wash with deionized water until the pH is about 7, and dry at 70°C for 24 hours to obtain MgAl-MIDA-LDHs, an infrared absorbing material with MIDA intercalation structure.

[0058] Use TG / DTA, ICP and elemental analysis methods to analyze and characterize the product, and determine its chemical formula / composition as: Mg 0.618 Al 0.382 (OH) 2 (C 5 h 7 NO 4 2- ) 0.18...

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Abstract

The invention relates to a selective infrared absorption material of amino adipate with an intercalation structure which is shorten as IDAs-LDHs and the molecular formula thereof is (M<2+>)1-x(M<3+>)x(OH)2(A<2->a(Bb.mH2O. The invention also relates to a preparation method of the selective infrared absorption material of the amino adipate with the intercalation structure, which is characterized in that hydrotalcite LDHs is taken as a precursor, and organic matter of aminoacetic acid is intercalated between the hydrotalcite LDHs layers by an ion-exchange method and then assembled to obtain the IDAs-LDHs with a good crystal phase structure and excellent performance. The absorptivity of the IDAs-LDHs material for absorbing infrared ray with various wave bands is increased by more than 45 percent to 79 percent compared with that of the hydrotalcite LDHs precursor, by 20 percent compared with the hydrotalcite in 7 to 25mum and by more than 105 percent compared with the hydrotalcite in 10 to 14mum, so the IDAs-LDHs material has excellent infrared absorption ability and is a good infrared absorption material.

Description

technical field [0001] The invention relates to an aminodiacetic acid intercalation structure selective external absorption material and a preparation method thereof. Background technique [0002] In recent years, infrared absorbing materials, as important functional additives, have played an important role in improving the thermal insulation performance of agricultural films. At present, the thermal insulation agents used by domestic agricultural film enterprises are mainly minerals, such as kaolin, talcum powder, diatomaceous earth, silica, sericite, calcium carbonate, etc. However, due to the chemical composition, structure and particle shape, the infrared absorption ability of these substances is low, and there are mixed crystal phases and large particles, which directly lead to poor dispersion performance in the agricultural film, affect the visible light transmission performance, accelerate Agricultural film aging and reduce the service life and use effect of agricult...

Claims

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Application Information

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IPC IPC(8): C01G1/00
Inventor 李殿卿王丽静徐向宇林彦军
Owner BEIJING UNIV OF CHEM TECH
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