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Preparation method of polymelamine-formaldehyde polymer microsphere three-dimensional template material

A technology of polymelamine and formaldehyde polymers, applied in the field of polymer microsphere science and application, can solve the problems of large surface reaction ability of coagulation, irregular spatial matrix arrangement, uneven particle size of microspheres, etc., and achieve great application potential , low cost, regular and orderly structure

Inactive Publication Date: 2018-08-24
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the deficiencies of the existing polymelamine-formaldehyde polymer microspheres, which are difficult to control the reaction conditions, the particle size of the microspheres is uneven, and the space matrix arrangement is irregular, and provide a three-dimensional template for polymelamine-formaldehyde polymer microspheres The preparation method of the material. The polymer microsphere template material prepared by this method has the characteristics of extremely uniform particle size, small particle size, large specific surface area, regular and orderly structure, strong adsorption, large coagulation effect and strong surface reaction ability.

Method used

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  • Preparation method of polymelamine-formaldehyde polymer microsphere three-dimensional template material

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Embodiment 1

[0017] A method for preparing a polymelamine-formaldehyde polymer microsphere three-dimensional template material comprises the following steps: first, melamine and formaldehyde are added to 100ml of deionized water at a molar ratio of 1:10, and fully stirred at room temperature to make them evenly mixed. Then the temperature of the solution was slowly raised from room temperature to 85°C, and the temperature was kept for 60 minutes for prepolymerization, and then 1 part of formic acid was added dropwise to the solution (the mass ratio of 1 part of formic acid to melamine monomer was 1:12.5) to adjust the pH. The precipitation reaction was continued for 80 min. After the reaction, the product is centrifuged and washed with water to obtain polymelamine-formaldehyde microspheres in the form of white solid powder. Disperse the above polymelamine-formaldehyde microspheres in water to obtain a monodisperse polymelamine-formaldehyde microsphere emulsion with a solid-to-liquid ratio ...

Embodiment 2

[0019] A method for preparing a polymelamine-formaldehyde polymer microsphere three-dimensional template material, comprising the following steps: first, adding melamine and formaldehyde into 100ml of deionized water at a molar ratio of 1:50, and fully stirring at room temperature to make them evenly mixed. Then the temperature of the solution is slowly raised from room temperature to 30°C, and the prepolymerization reaction is carried out at the temperature for 30 minutes, and 1 part of formic acid is added dropwise to the solution (the mass ratio of 1 part of formic acid to melamine monomer is 1:5) to adjust the pH, and continue The precipitation reaction was carried out for 50 min. After the reaction, the product is centrifuged and washed with water to obtain polymelamine-formaldehyde microspheres in the form of white solid powder. Disperse the above-mentioned polymelamine-formaldehyde microspheres in water to obtain a monodisperse polymelamine-formaldehyde microsphere emul...

Embodiment 3

[0021] A method for preparing a polymelamine-formaldehyde polymer microsphere three-dimensional template material, comprising the following steps: first, adding melamine and formaldehyde into 100ml of deionized water at a molar ratio of 1:16, and fully stirring at room temperature to make them evenly mixed. Then the temperature of the solution was slowly raised from room temperature to 80°C, and the prepolymerization reaction was carried out at the temperature for 20 minutes, and 1 part of formic acid was added dropwise to the solution (the mass ratio of 1 part of formic acid to melamine monomer was 1:15.) to adjust the pH, The precipitation reaction was continued for 40 min. After the reaction, the product is centrifuged and washed with water to obtain polymelamine-formaldehyde microspheres in the form of white solid powder. Disperse the above polymelamine-formaldehyde microspheres in water to obtain a monodisperse polymelamine-formaldehyde microsphere emulsion with a solid-t...

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Abstract

The invention discloses a preparation method for a poly(melamine-formaldehyde) polymeric microsphere three-dimensional template material. The preparation method comprises the following steps: uniformly mixing melamine and formaldehyde, in a mol ratio of 1: 10-50, in 100 mL of deionized water, then slowing heating the obtained mixture to 30 to 85 DEG C for prepolymerization for 20 to 60 min; then adding a proper amount of formic acid or acetic acid drop by drop for a precipitation reaction for 40 to 80 min and subjecting a reaction product to centrifugation and washing so as to obtain poly(melamine-formaldehyde) polymeric microspheres; dispersing the microspheres in water so as to obtain an emulsion with a solid-liquid ratio of 0.5-1 g: 100 ml, subjecting the emulsion to natural sedimentation for 5 to 10 d and then carrying out vacuum drying at 35 to 45 DEG C. The polymeric microsphere template material prepared by using the method has the characteristics of uniform particle size, small particle size, large specific surface area, neat and ordered structure, strong adsorptivity, great coacervation effect, strong surface reaction capability, etc.

Description

technical field [0001] The invention belongs to the technical field of polymer microsphere science and application, and specifically relates to a preparation method of a polymelamine-formaldehyde polymer microsphere three-dimensional template material. Background technique [0002] Polymelamine-formaldehyde (MF) microspheres are a class of widely used materials. The difference in physical and chemical properties between MF microspheres and inorganic oxides makes it easy to remove as a template, and its good mechanical properties make it an excellent three-dimensional Template materials to prepare other three-dimensional macroporous materials. Monodisperse polymelamine-formaldehyde polymer microspheres have the advantages of uniform particle size, regular shape, good surface reaction ability and easy functionalization, etc. They also have high research and application value in the fields of immune technology and early diagnosis of diseases. . [0003] Although polymelamine-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G12/32C08J3/12C08J3/05C08L61/28
CPCC08G12/32C08J3/05C08J3/12C08J2361/28
Inventor 周爱军张奇孙义民昝飞陈柳任秀梅
Owner WUHAN INSTITUTE OF TECHNOLOGY
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