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Method of allowing nano titanium dioxide to be evenly distributed in polymer

A nano-titanium dioxide, evenly distributed technology, applied in the field of nano-materials, can solve the problems of nano-silver and nano-titanium materials that cannot be fully exerted, poor compatibility, and easy to agglomerate.

Inactive Publication Date: 2017-04-26
NINGBO COLLEGE OF HEALTH SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, because nano-silver materials are metastable materials, they are particularly sensitive to environmental factors such as temperature, vibration, light, magnetic field and atmosphere, and may grow by themselves at room temperature, and are easy to agglomerate, easy to oxidize, and compatible with other materials. Poor problem, which will make the inherent properties of nano-metal materials can not be fully or fully exerted
When the mixed material of nano-titanium dioxide and nano-silver is used in materials such as polyethylene, polypropylene, or polymers such as polyvinyl chloride, it is easy to agglomerate during the blending process, resulting in uniform material properties of nano-silver and nano-titanium dioxide. can't be fully utilized

Method used

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Experimental program
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Effect test

Embodiment 1

[0036] A method for uniformly distributing nano-titanium dioxide in a polymer, comprising the steps of:

[0037] Step (1): prepare nano silver;

[0038] Step (2): prepare nano titanium dioxide;

[0039] Step (3): the nano-silver in step (1) is supported on the surface of the nano-titanium dioxide in step (2) to obtain a nano-titanium dioxide-supported silver composite material;

[0040] Step (4): adding a film-forming agent, a defoaming agent, and a leveling agent to the nano-titanium dioxide-silver-supported composite material in step (3); agent.

[0041] Step (5): The mixture obtained in step (4) is uniformly mixed in the polymer.

[0042] Wherein, step (1) specifically comprises the following steps:

[0043] Step 1.1: prepare a silver ammonia solution with a silver nitrate content of 20-100 g / L, add polyvinylpyrrolidone and polyvinyl alcohol in the silver ammonia solution to form a composite solution, wherein the weight ratio of silver ammonia solution, polyvinylpyrroli...

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PUM

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Abstract

The invention relates to the field of nano materials, and particularly discloses a method of allowing nano titanium dioxide to be evenly distributed in a polymer. The method comprises the following steps: (1) nano silver is prepared; (2) nano titanium dioxide is prepared; (3) nano silver is loaded to the surface of nano titanium dioxide, and a nano titanium dioxide silver-loaded composite material is obtained; (4) a film-forming agent, a defoaming agent and a flatting agent are added to the nano titanium dioxide silver-loaded composite material; and (5) a mixture obtained in the step (4) is uniformly mixed in the polymer. Nano titanium dioxide prepared by the method can be evenly dispersed and composited in the polymer in a nano scale, and has good dispersing performance, and the possibilities of aggregation and sediment phenomena are low.

Description

technical field [0001] The invention relates to the field of nanomaterials, in particular to a method for uniformly distributing nanometer titanium dioxide in a polymer. Background technique [0002] The commonly used inorganic nano-antibacterial agents today are mainly nano-silver and nano-TiO2. Nano-titanium dioxide can remove bacteria and purify the air because under the condition of light or water, the electrons in its valence band are excited to the conduction band, and holes are generated in the valence band, and free electron-hole pairs can make oxygen and oxygen. Water activation produces active oxygen and OH free radicals with high reactivity, which has a strong degradation effect on harmful gases and bacteria in the air, thus giving the coating good antibacterial and air purification performance; nano silver is the particle It has a strong inhibitory and killing effect on dozens of pathogenic microorganisms such as Escherichia coli, Neisseria gonorrhoeae, Chlamydi...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/06C09C3/10B22F9/24B22F1/00
CPCC09C1/3692C09C3/006C09C3/063C09C3/10B22F9/24B22F1/054
Inventor 马少华曹国洲贾志舰李若沛
Owner NINGBO COLLEGE OF HEALTH SCI