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Selective infrared absorption material with phosphor-containing intercalation structure, and preparation and use thereof

A technology of infrared absorption and selectivity, applied in the field of infrared absorption materials and their preparation, to achieve the effects of easy preparation, excellent infrared absorption capability, and extended range

Inactive Publication Date: 2009-03-04
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

while MgAl-CO 3 -LDHs have absorption defects, MgAl-CO 3 -The absorption of carbonate groups between LDHs layers is mainly at 7-8 μm, which is not in the peak range of surface infrared radiation

Method used

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  • Selective infrared absorption material with phosphor-containing intercalation structure, and preparation and use thereof
  • Selective infrared absorption material with phosphor-containing intercalation structure, and preparation and use thereof
  • Selective infrared absorption material with phosphor-containing intercalation structure, and preparation and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Step A: 112.5g (0.3mol) of solid Al(NO 3 ) 3 9H 2 O and 153.9g (0.6mol) of solid Mg(NO 3 ) 2 ·6H 2 O was dissolved in deionized water to make 750ml mixed salt solution A; in addition, 57.6g (1.44mol) solid NaOH and 63.5g (0.6mol) solid NaOH 2 CO 3 Dissolve in deionized water to make 750ml alkaline solution B. 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-CO 3 -LDHs, its Mg 2+ / Al 3+ =2:1.

[0039] Take 225g (0.437mol) of the above filter cake and ultrasonically disperse it with deionized water to prepare 800ml of suspension.

[0040] Step B: Weigh 58g (0.372mol) NaH 2 PO 4 2H 2 O was dissolved in deionized water to form a 450ml solution, ...

Embodiment 2

[0048] Step A: Same as Step A in Example 1.

[0049] Step B: Same as Step B in Example 1.

[0050] Step C: Under nitrogen protection, drop the solution prepared in step B into the suspension prepared in step A. The pH of the system was adjusted to 8.0 with 0.2M NaOH. Reflux crystallization at 100°C for 2h, filter, and remove CO 2 Washed with deionized water to pH about 7, dried at 70°C for 24 hours to obtain HPO 4 2- Intercalation Structure Infrared Absorbing Material MgAl-HPO 4 -LDHs.

[0051] Use TG / DTA, ICP and elemental analysis methods to analyze and characterize the product, and determine its chemical formula / composition as: Mg 0.66 al 0.34 (OH) 2 (HPO 4 2- ) 0.17 0.45H 2 O. Among them, HPO 4 The mass percent composition of water is 19.6%, and the mass percent composition of water is 9.7%.

Embodiment 3

[0053] Step A: Same as Step A in Example 1.

[0054] Step B: Same as Step B in Example 1.

[0055] Step C: Under nitrogen protection, drop the solution prepared in step B into the suspension prepared in step A. The pH of the system was adjusted to 13.0 with 0.3M NaOH. Reflux crystallization at 100°C for 5h, filter, and remove CO 2 Washed with deionized water to pH about 7, dried at 70°C for 24 hours to obtain PO 4 3- Intercalation Structure Infrared Absorbing Material MgAl-PO 4 -LDHs.

[0056] Use TG / DTA, ICP and elemental analysis methods to analyze and characterize the product, and determine its chemical formula / composition as: Mg 0.67 al 0.33 (OH) 2 (PO 4 3- ) 0.11 0.21H 2 O. Among them, PO 4 The mass percent composition of water is 14.3%, and the mass percent composition of water is 5.2%.

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Abstract

The invention discloses a selective infrared absorption material of a phosphoric intercalated structure as well as a preparation method application thereof. The selective infrared absorption material of a phosphoric intercalated structure is short in P-LDHs and the molecular formula thereof is Mg<2+>1-xAl<3+>x(OH)2(Pa(CO3<2>b.Kh2O. The preparation method of the selective infrared absorption material of a phosphoric intercalated structure is as follows: mg-al hydrotalcite MgAl-CO3-LDHs which takes the anions between layers as carbonate ions is used as a precursor; an ion exchange method is used to insert the ions of a phosphoric compound into the layers of the hydrotalcite and assembled to obtain the P-LDHs with an excellent crystal phase structure. The P-LDHs has excellent infrared absorption performance. When the P-LDHs is applied into a polymer film, the infrared absorption effect of P-LDHs is better than that of MgAL-CO3-LDHs which is singly used; the infrared absorption effect is better than that of singly adding P-LDHs when PE is added after the MgAL-CO3-LDHs and the P-LDHs are mixed according to a proportion of 3-0.3: 1.

Description

technical field [0001] The invention relates to an infrared absorption material and its preparation method and application, in particular to a phosphorus-containing intercalation structure selective infrared absorption material and its preparation method and application. Background technique [0002] Agricultural film is widely used in modern agricultural production and cultivation because of its good light transmission and heat preservation. In recent years, infrared absorbing materials, as important functional additives, have played an important role in improving the thermal insulation performance of agricultural films. The effective wavelength of crop photosynthesis is 0.4-0.7μm, which is basically consistent with visible light. Therefore, it is necessary to improve the permeability of the agricultural film in the wavelength range of 0.4-0.7 μm, which requires the inorganic particles dispersed in the agricultural film to have a small size (<0.4 μm). During the day, 9...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/02C08L23/06C08K3/26
Inventor 李殿卿徐向宇王丽静林彦军
Owner BEIJING UNIV OF CHEM TECH
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