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A kind of preparation method of density gradient polyacrylate foam material

A technology of polyacrylate and density gradient, which is applied in the field of preparation of low-density porous materials, can solve the problems of easy to destroy the gradient formation process, difficult to accurately control, troublesome molding devices, etc., and achieve polyacrylate foam with complete structure and adjustable size control, the effect of a wide range of density gradients

Inactive Publication Date: 2017-08-15
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This preparation process is more troublesome to build a molding device, and there are many steps to be controlled in the molding process, which is not easy to control accurately, especially in the process of adding sol, it will have an impact on the added sol, which is easy to damage the gradient formation process

Method used

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  • A kind of preparation method of density gradient polyacrylate foam material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Dibutyl phthalate is used as solvent, trimethylolpropane triacrylate (TMPTA) is used as solute, and the concentration of TMPTA is 20mg / cm 3 Sol A and 100mg / cm 3 The sol B, and add photoinitiator benzoin methyl ether according to the ratio of TMPTA and benzoin methyl ether mass ratio of 100:1.

[0027] (2) Prepare two kinds of sols in the centrifuge tube as required. The rotation conditions of the selected centrifuge tube are: the time is 200min, the vertical inclination angle is first 85° (100min) and then 89° (100min), and the rotation speed is 40 rad / min. Acrylate sols with density gradients are obtained.

[0028] (3) The light intensity is 8.0W / cm 2 The density gradient acrylate sol was irradiated with ultraviolet light for 8 minutes to obtain a density gradient polyacrylate gel.

[0029] (4) Soak the obtained density gradient polyacrylate gel in acetone for 8 days, replace the acetone 4 times during the period, then soak in chloroform to remove the centrifuge...

Embodiment 2

[0031] (1) Dibutyl phthalate is used as solvent, trimethylolpropane triacrylate (TMPTA) is used as solute, and the concentration of TMPTA is 10mg / cm 3 Sol A and 100mg / cm 3 The sol B, and add photoinitiator benzoin methyl ether according to the ratio of TMPTA and benzoin methyl ether mass ratio of 100:1.

[0032] (2) Prepare two kinds of sols in the centrifuge tube as required. The rotation conditions of the selected centrifuge tube are 300min, the vertical inclination angle is first 89° (290min), and the last 70° (10min), the speed is 50rad / min, and the density is obtained. Gradient acrylate sol.

[0033] (3) The light intensity is 8.0W / cm 2The density gradient acrylate sol was irradiated with ultraviolet light for 8 min to obtain a density gradient polyacrylate gel.

[0034] (4) Soak the obtained density gradient polyacrylate gel in acetone for 8 days, replace the acetone 4 times during this period, then soak in chloroform to remove the centrifuge tube, take out the gel sa...

Embodiment 3

[0036] (1) Dibutyl phthalate is used as solvent, trimethylolpropane triacrylate (TMPTA) is used as solute, and the concentration of TMPTA is respectively 30mg / cm 3 Sol A and 100mg / cm 3 The sol B, and add photoinitiator benzoin methyl ether according to the ratio of TMPTA and benzoin methyl ether mass ratio of 100:1.

[0037] (2) Prepare two kinds of sols in the centrifuge tube as required. The selected centrifuge tube rotation condition is 200 min, the vertical inclination angle is first 85° (60 min), then 88° (120 min), and the rotation speed is 40rad / min. Acrylate sols with density gradients are obtained.

[0038] (3) The light intensity is 8.0W / cm 2 Density gradient acrylate sol was irradiated with ultraviolet light for 10 min to obtain polyacrylate gel with density gradient.

[0039] (4) Soak the obtained density gradient polyacrylate gel in acetone for 10 days, replace the acetone 5 times during this period, then soak in chloroform to remove the centrifuge tube, take o...

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Abstract

The invention provides a preparation method of density gradient polyacrylate foam material. Using dibutyl phthalate as solvent, trimethylolpropane triacrylate as solute, and proper addition of benzoin methyl ether as photoinitiator to prepare single-density acrylate sol. The density gradient acrylate sol was prepared by mixing two sols with different densities using the density gradient sol preparation process of centrifugal mixing. The gel was induced by ultraviolet light irradiation, and the polyacrylate foam material with density gradient was obtained through solvent replacement and supercritical drying process. The preparation process of the present invention is simple and easy, and the prepared density gradient polyacrylate foam has a complete structure and a continuously controllable density gradient range. etc. are widely used.

Description

technical field [0001] The invention belongs to the field of preparation of low-density porous materials, and in particular relates to a preparation method of a density gradient polyacrylate foam material. Background technique [0002] Functionally gradient materials (Functionally gradient materials, FGM) refer to the continuous changes in the composition, structure, physical parameters and physical, chemical, biological and other single or composite properties, so that the properties and functions of the material also change in gradients to adapt to different environments. , to achieve a new type of composite material with a special function. Due to the incomparable advantages of general composite materials, FGM has broad application prospects in various fields with special requirements for materials through the ingenious combination of metals, ceramics, polymers and other substances, and has been highly valued by countries all over the world. In 2006, the American "Stardu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/28C08L35/02C08F122/14C08F2/48
Inventor 庞晓罗炫张林
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS