Preparation method of colloidal solution of nano-ZnO

A nano-zinc oxide and colloidal solution technology, applied in the direction of zinc oxide/zinc hydroxide, nanotechnology, nanotechnology, etc., can solve the problems of easy agglomeration, difficult control of particle size by chemical methods, large size dispersion, etc., and achieve particle size Uniformity, good biocompatibility and biodegradability, viscosity reducing effect

Inactive Publication Date: 2013-09-25
SUZHOU UNIV
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Problems solved by technology

The above-mentioned preparation method has low requirements on equipment and can realize the specialization of nano-zinc oxide, but the chemical method often h

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  • Preparation method of colloidal solution of nano-ZnO
  • Preparation method of colloidal solution of nano-ZnO
  • Preparation method of colloidal solution of nano-ZnO

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[0020] Example 1:

[0021] 1. Prepare dialdehyde-based hydroxypropyl cellulose according to the technical scheme provided in the literature "Selectively oxidize the aggregate structure of cotton fiber". The preparation method is: first dissolve hydroxypropyl methyl cellulose in deionized water to obtain the quality The percentage of 1% hydroxypropyl methylcellulose solution, and then the mass fraction of 1% sodium periodate aqueous solution is gradually dropped into the above solution, the volume ratio of the two is 1:1-50:1. The reaction temperature was set to 50°C, and the reaction was fully reacted with mechanical stirring under a dark environment. After 30 minutes of reaction, the reaction solution was cooled to room temperature. Then the above solution was dialyzed for 24 hours with a dialysis bag with a molecular weight of 5000 to obtain pure dialdehyde hydroxypropyl methylcellulose. See attached figure 1 , It is the infrared spectrum of hydroxypropyl methyl cellulose befo...

Example Embodiment

[0028] Example 2:

[0029] 1. Prepare dialdehyde hydroxypropyl methylcellulose according to the technical scheme of Example 1. Dissolve 0.20 g of dialdehyde hydroxypropyl methylcellulose in 100 mL of deionized water to obtain an aqueous solution of dialdehyde hydroxypropyl methylcellulose with a concentration of 2 g / L;

[0030] 2. Dissolve 0.727g of zinc nitrate in 100mL of deionized water to obtain a zinc nitrate solution with a concentration of 7.27g / L;

[0031] 3. Dissolve 5g of sodium hydroxide in 100mL of deionized water to obtain an aqueous solution of sodium hydroxide with a concentration of 50g / L;

[0032] 4. Mix 2g / L dialdehyde hydroxypropyl methylcellulose aqueous solution and 7.87g / L zinc nitrate aqueous solution at a volume ratio of 4:1, and add 50g / L dropwise at 70°C under constant stirring. An aqueous solution of L sodium hydroxide (the mass ratio of zinc nitrate to sodium hydroxide is 189:80), after 2 hours of reaction, a nano-zinc oxide colloidal solution with a part...

Example Embodiment

[0033] Example 3:

[0034] 1. Dissolve 0.20 g of dialdehyde hydroxypropyl methylcellulose in 100 mL of deionized water to obtain an aqueous solution of dialdehyde hydroxypropyl methylcellulose with a concentration of 2 g / L;

[0035] 2. Dissolve 0.727g of zinc nitrate in 100mL of deionized water to obtain a zinc nitrate solution with a concentration of 7.27g / L;

[0036] 3. Dissolve 5mL ammonia in 95mL deionized water to obtain an aqueous ammonia solution;

[0037] 4. Mix 2g / L dialdehyde hydroxypropyl methylcellulose aqueous solution and 7.87g / L zinc nitrate aqueous solution in a volume ratio of 4:1, and add ammonia aqueous solution dropwise at 70℃ under constant stirring. (The mass ratio of zinc nitrate to ammonia is 189:20). After 2 hours of reaction, a nano-zinc oxide colloidal solution with a particle size of 10-60 nm can be obtained.

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Abstract

The invention discloses a preparation method of a colloidal solution of nano-ZnO. The method comprises the following steps: mixing an aqueous modified cellulose solution having a concentration of 0.001-100g/L with a zinc salt solution having a concentration of 0.01-100g/L according to a volume ration of 1:10-100:1, wherein the modified cellulose is dialdehyde hydehydroxypropyl methyl cellulose obtained through the selective oxidation of the secondary hydroxyl groups in the C2 and C3 positions of hydroxypropyl methyl cellulose; and slowly adding an alkaline solution for adjusting the pH value to 8.5-11.5, and stirring at 20-90DEG C for 1-600min until reaction completion in order to obtain the colloidal solution of nano-ZnO having an average particle size of 1-100nm. The prepared nano-ZnO has the advantages of ultrahigh stability, antibiosis and ultraviolet resistance, good biocompatibility and good biodegradability, and can be applied to the coat field, the textile field, the medical health field and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanometer materials, and in particular relates to a preparation method of nanometer zinc oxide colloidal solution. Background technique [0002] Nano-zinc oxide is a new type of multifunctional inorganic semiconductor material, and its particle size is generally between 1 and 100nm. When the particle size of zinc oxide reaches the nanometer level, special surface effects, volume effects, and quantum size effects will be produced, thereby exhibiting special properties. For example, compared with ordinary zinc oxide, nano-zinc oxide has excellent non-migration, fluorescence, adsorption and scattering of ultraviolet rays, etc., and can be widely used in the fields of electricity, optics, magnetism, and chemical catalysis. Utilizing the absorption performance of nano-zinc oxide on ultraviolet light, ultraviolet detectors, LEDs, LDs and anti-ultraviolet textiles can be prepared. Utilizing the ...

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Application Information

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IPC IPC(8): C01G9/02B82Y30/00
Inventor 林红陈宇岳徐思峻
Owner SUZHOU UNIV
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