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Nano-silver-loaded resorcinol-formaldehyde resin microspheres and nano-silver-loaded mesoporous carbon microspheres

A technology of silver resorcinol and formaldehyde resin, which is applied in the field of silver microsphere-loaded materials, can solve the problems of high cost, low production efficiency, and complicated process of loading nano-silver microspheres, and achieve low cost, low production cost, microsphere The effect of controllable ball size

Active Publication Date: 2015-10-28
SHENZHEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the embodiment of the present invention provides a nano-silver-loaded resorcinol-formaldehyde resin microsphere and its preparation method and nano-silver-loaded mesoporous carbon microspheres to solve the complicated process of preparing nano-silver microspheres. Technical problems of low production efficiency and high cost

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  • Nano-silver-loaded resorcinol-formaldehyde resin microspheres and nano-silver-loaded mesoporous carbon microspheres
  • Nano-silver-loaded resorcinol-formaldehyde resin microspheres and nano-silver-loaded mesoporous carbon microspheres

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preparation example Construction

[0019] The embodiment of the present invention provides a method for preparing nano-silver loaded resorcinol-formaldehyde resin microspheres with simplified process, mild conditions, high production efficiency and low cost. The method comprises the steps of:

[0020] Disperse resorcinol-formaldehyde resin microspheres in ethanol / water mixed solvent, add ionic silver precursor solution at 0-80°C for in-situ self-oxidation-reduction reaction, reduce ionic silver to elemental silver, and form Resorcinol-formaldehyde resin microspheres loaded with nano silver.

[0021] Preferably, the resorcinol-formaldehyde resin microspheres used in the preparation method of the above-mentioned nano silver-loaded resorcinol-formaldehyde resin microspheres are prepared according to the following method:

[0022] Formaldehyde solution is added dropwise into resorcinol ethanol / water mixed solvent containing ammonia water for reaction, and then filtered, washed and dried to obtain resorcinol-formal...

Embodiment 1

[0046] A method for preparing nanometer silver-loaded resorcinol-formaldehyde resin microspheres and a method for preparing nanometer silver-loaded mesoporous carbon microspheres.

[0047] Wherein, the preparation method of loading nano-silver resorcinol-formaldehyde resin microspheres comprises the following steps:

[0048] Step S11: 2.1g of resorcinol was filled with nitrogen in the flask, added 64g of ethanol + 200g of water and stirred to dissolve, added 2.25mL of ammonia water, added dropwise 3mL of formaldehyde solution (37%) under vigorous stirring, and reacted for 16h. Centrifuge to remove the dark yellow supernatant, wash with deionized water until colorless, freeze-dry to obtain 2.3 g of resorcinol-formaldehyde resin microspheres (RFS) powder, and SEM shows a particle size of about 450 nm;

[0049] Step S12: 480 mg of RFS-450 prepared in Step S11 was ultrasonically dispersed in 156 mL of absolute ethanol + 80 mL of water, 4 mL of an aqueous solution containing 918 mg...

Embodiment 2-13

[0053] For the preparation method of nano-silver loaded resorcinol-formaldehyde resin microspheres, refer to the preparation method in Example 1. Among them, the dosage of RFS is 16 mg, and the rest of the parameters are shown in the following table 1: The preparation method of preparing nano-silver loaded mesoporous carbon microspheres prepared from this embodiment 2-13 as a raw material Refer to the preparation method of nano-silver loaded mesoporous carbon microspheres in Example 1.

[0054] Table 1

[0055]

[0056] (Note: T1 in Table 1 is the temperature of the reaction of ionic silver and resorcinol-formaldehyde resin microspheres; t2 is the time for the reaction of ionic silver and resorcinol-formaldehyde resin microspheres)

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Abstract

The invention discloses nano-silver-loaded resorcinol-formaldehyde resin microspheres, a preparation method therefore and a preparation method of nano-silver-loaded mesoporous carbon microspheres. The preparation method of the nano-silver-loaded resorcinol-formaldehyde resin microspheres comprises the step of preparing the resorcinol-formaldehyde resin microspheres and the step of conducting the in situ self-redox reaction on the resorcinol-formaldehyde resin microspheres and ion-state silver precursors, and the preparation method of the nano-silver-loaded mesoporous carbon microspheres comprises the step of conducting carbonization treatment on the nano-silver- loaded resorcinol-formaldehyde resin microspheres directly in the oxygen-free atmosphere. According to the preparation method of the nano-silver-loaded resorcinol-formaldehyde resin microspheres and the preparation method of the nano-silver-loaded mesoporous carbon microspheres, no extra reducing agent is needed to be added in, the nano-silver loading condition is mild, the preparation process is effectively simplified, the production efficiency is raised, and the nano-silver-loaded resorcinol-formaldehyde resin microspheres obtained through the preparation are stable in performance and low in cost.

Description

technical field [0001] The invention belongs to the field of silver-loaded microsphere materials, and in particular relates to a nanometer silver-loaded resorcinol-formaldehyde resin microsphere, a preparation method thereof, and a nanometer silver-loaded mesoporous carbon microsphere. Background technique [0002] Nano-silver microspheres combine the catalytic activity, antibacterial properties, and spectral absorption characteristics of nano-silver with the advantages of convenient separation, purification, and redispersion of micron-sized particles, and have attracted widespread attention from academic and industrial circles in recent years. Microspheres loaded with nano-silver uniformly and densely on the surface have shown good application prospects in many high-tech fields such as catalysis, antibacterial agents, immunoassays, and surface-enhanced Raman. [0003] The currently reported nano-silver microspheres generally involve the adsorption of silver ions (or silver ...

Claims

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Application Information

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IPC IPC(8): B01J13/02
Inventor 邓远名汤皎宁赵劲来陈月梅苏轶坤
Owner SHENZHEN UNIV
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