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Phenolic resin microspheres as well as preparation method and application thereof

A phenolic resin and microsphere technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problem that the particle size, sphericity and roughness of microspheres are difficult to control, the preparation process of phenolic resin microspheres is cumbersome, and the phenolic resin microspheres are difficult to control. Non-uniform particle size and other problems, to achieve the effect of less energy consumption, high mechanical strength and good sphericity

Active Publication Date: 2017-09-01
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] One of the purposes of the present invention is to provide a kind of phenolic resin microsphere, to solve the problem that existing phenolic resin microsphere particle diameter is not uniform, and sphericity is poor
[0006] The second object of the present invention is to provide a preparation method of phenolic resin microspheres to solve the problems that the existing phenolic resin microspheres preparation process is cumbersome and difficult to control the particle size, sphericity and roughness of the microspheres

Method used

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  • Phenolic resin microspheres as well as preparation method and application thereof
  • Phenolic resin microspheres as well as preparation method and application thereof
  • Phenolic resin microspheres as well as preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0038] Weigh 5 mmol of phloroglucinol, 25 mmol of glyoxylic acid and 0.1 mmol of F127 and dissolve them in 100 mL of acetonitrile, ultrasonically dissolve, and then stir at 400 r / min for 30 min at room temperature to self-assemble the monomer and porogen, After stirring, the self-assembled hydrogel was placed in a water bath at 80 °C for 24 h. After the reaction, cool to room temperature, centrifuge at 15,000 r / min for 5 min, wash with deionized water 5 times, and then wash with ethanol 5 times to remove unreacted impurities and porogen F127. Vacuum dry at 40 °C Finally, phenolic resin microspheres were obtained.

[0039] The obtained phenolic resin microspheres were characterized by SEM, and the obtained results were as follows: figure 1 shown. It can be seen from the figure that the surface of the phenolic resin microspheres is rough, the particle size distribution is uniform, and the particle size is 3.5 μm. The resulting phenolic resin microspheres were characterized by...

Embodiment 2

[0045]Weigh 5 mmol of phloroglucinol and 25 mmol of glyoxylic acid and dissolve them in 100 mL of acetonitrile, ultrasonically dissolve, and then stir at 400 r / min for 30 min at room temperature. ℃ in a water bath for 24 hours. After the reaction, cool down, centrifuge at 15000 r / min for 5 min, wash with deionized water for 5 times, and then wash with ethanol for 5 times to remove unreacted impurities. The phenolic resin microspheres were obtained after vacuum drying at 40 °C.

[0046] The obtained phenolic resin microspheres were characterized by SEM, and the obtained results were as follows: Figure 5 shown. It can be seen from the figure that the surface of the phenolic resin microspheres is smooth, the particle size distribution is uniform, and the particle size is 1 μm.

Embodiment 3

[0048] Weigh 5 mmol of phloroglucinol, 25 mmol of glyoxylic acid and 0.05 mmol of F127 into 100 mL of acetonitrile, ultrasonically dissolve, and then stir at room temperature with mechanical stirring at 400 r / min for 30 min to make the monomer and porogen After stirring, the self-assembled hydrogel was placed in a water bath at 80 °C for 24 h. After the reaction, cool to room temperature, centrifuge at 15000 r / min for 5 min, wash with deionized water for 5 times, then wash with ethanol for 5 times to remove unreacted impurities and porogen F127, and then in The phenolic resin microspheres can be obtained after vacuum drying at 40 °C.

[0049] The obtained phenolic resin microspheres were characterized by SEM, and the obtained results were as follows: Figure 6 shown. It can be seen from the figure that the surface of the phenolic resin microspheres is rough, the particle size distribution is uniform, and the particle size is 4 μm.

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Abstract

The invention provides phenolic resin microspheres as well as a preparation method and application thereof. The phenolic resin microspheres are prepared by the following steps: dissolving phloroglucinol, glyoxylic acid and a pore-foaming agent into a solvent, wherein the molar ratio of the phloroglucinol to the glyoxylic acid is 1 to (2 to 10), and the dose of the pore-foaming agent is 0 to 0.1 time the molar ratio of the phloroglucinol; then carrying out self-assembling, curing, separating, washing and vacuum drying to obtain the phenolic resin microspheres. According to the preparation method provided by the invention, one-step method is adopted to prepare the phenolic resin microspheres, the preparation process is simple, reaction conditions are mild and the use of formaldehyde and other carcinogens is effectively avoided; in addition, no harmful substances are released in the reaction process, and no additional catalysts need to be added; the obtained phenolic resin microspheres have the advantages of high mechanical strength, large adsorption capacity, uniform grain diameter and good sphericity; the phenolic resin microspheres can be used as a matrix material for a polymer adsorbent and are applied to the fields of biomedicine, chromatographic separation, environmental detection, solid phase extraction and the like.

Description

technical field [0001] The invention relates to a phenolic resin, in particular to a phenolic resin microsphere and its preparation method and application. Background technique [0002] Resin materials have been widely used in polymer adsorbents and other fields due to their easy availability of raw materials, low cost and simple production process. The traditional phenolic resin is a linear polymer formed by the polycondensation reaction of phenol and formaldehyde under acid or alkali catalyzed conditions. It is a typical representative of the earliest successfully developed and commercialized thermosetting polymer in the world. The synthesis of phenolic resin usually adopts polycondensation method, including under the action of basic catalyst, excessive formaldehyde produces body-shaped thermosetting resin; under the action of acidic catalyst, excessive phenol produces linear thermoplastic resin. [0003] In recent years, due to the advantages of high mechanical strength,...

Claims

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Application Information

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IPC IPC(8): C08G8/04C08J3/12B01J20/26
CPCB01J20/262C08G8/04C08J3/12C08J2361/06
Inventor 闫宏远王明伟韩晔红乔凤霞刘海燕白立改苑亚楠
Owner HEBEI UNIVERSITY
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