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A preparation method of nano-rod-shaped zinc oxide and its application in the preparation of air-conditioning ventilation ducts

A nano-rod-shaped, zinc oxide technology, applied in the direction of zinc oxide/zinc hydroxide, nanotechnology, paint containing biocide, etc., can solve the problems of easy aggregation of particles, surface defects, and restrictions on the development of nano-ZnO, and achieve good repeatability , surface integrity, improve the effect of self-cleaning and antibacterial and anti-mildew performance

Active Publication Date: 2019-05-14
北京振兴华龙制冷设备有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although nano-ZnO has strong potential in the field of antibacterial and anti-mildew, most of the existing synthesis methods are high-temperature calcination, the particles are easy to agglomerate, and there are a large number of defects on the surface, which seriously restricts the development of nano-ZnO as an antibacterial agent.

Method used

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  • A preparation method of nano-rod-shaped zinc oxide and its application in the preparation of air-conditioning ventilation ducts
  • A preparation method of nano-rod-shaped zinc oxide and its application in the preparation of air-conditioning ventilation ducts

Examples

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Embodiment 1

[0035] A preparation method of nanorod-shaped zinc oxide: comprising the following preparation steps:

[0036] 1) Preparation of alkali solution: the alkali solution is a glycerol solution of sodium borohydride, and the pH value of the alkali solution is 10-11;

[0037] 2) Mixed titration: at room temperature (20°C) and normal pressure (1.01×10 5 Pa), under stirring conditions, drop the alkali solution in step 1) into the 0.04M aqueous solution of zinc acetate dihydrate or zinc nitrate hexahydrate to form a gel, continue to titrate to form a white precipitate, and age for 3 to 24 hours , the white precipitate after aging is a uniform array of nanorods;

[0038] 3) Washing: filter and wash the white precipitate aged in step 2) several times with distilled water or absolute ethanol until the washing solution is neutral;

[0039] 4) Centrifugation: the washed white precipitate is centrifuged and vacuum-dried at room temperature (25° C.) to obtain the nanorod-shaped zinc oxide p...

Embodiment 2

[0042] Antibacterial air-conditioning and ventilation plastic pipes were prepared using nanorod-shaped zinc oxide described in Example 1.

[0043] Include the following steps:

[0044] 1) Mix the nanorod-shaped zinc oxide powder with absolute ethanol to obtain a uniformly dispersed mixture, and the mass ratio of absolute ethanol to nanorod-shaped zinc oxide is 3.5:1;

[0045] 2) Prepare a mixed solution of Kh-560 silane coupling agent and absolute alcohol, the mass ratio of kh-560 silane coupling agent to absolute alcohol is 1:1.5;

[0046] 3) Add the mixed solution in step 2) dropwise to the mixture in step 1), stir and filter, and dry for 1-2 hours to obtain modified nano-zinc oxide;

[0047] 4) Mix the modified nano-zinc oxide with PP, PE, PVC, ABS and other plastic raw materials according to the mass ratio of 1; 2.5, extrude and granulate with a double-roll extruder to obtain plastic antibacterial masterbatch;

[0048] 5) The plastic antibacterial masterbatch is added to...

Embodiment 3

[0053] Antibacterial metal coatings were prepared using nanorod-shaped zinc oxide described in Example 1.

[0054] Add nano-rod-shaped zinc oxide to the aqueous solution of sodium lauryl sulfate dispersant (the mass ratio of nano-rod-shaped zinc oxide, sodium lauryl sulfate, and water is 1:5:40), and self-prepared liquid materials can be sprayed onto It can be used on metal ventilation pipes such as tin sheet and stainless steel to improve its self-cleaning and antibacterial properties.

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Abstract

The invention discloses a preparation method of nanometer rod-shaped zinc oxide and an application thereof in preparing a ventilation pipeline of an air conditioner. The method comprises the followingsteps: firstly, preparing an alkali solution from glycerol of sodium borohydride; dripping the alkaline solution into a zinc acetate dihydrate solution or a zinc nitrate hexahydrate solution at a normal temperature and pressure to generate a gel, continuing titration to generate a white precipitate, and performing aging; performing suction filtration and washing on the aged white precipitate, andperforming centrifugation and vacuum drying at a room temperature to obtain nanometer rod-shaped zinc oxide powder. The nanometer rod-shaped zinc oxide particle prepared by the method has the advantages of uniform size, rod-like structure and no defect on the surface, and can be used for preparing a plastic ventilation pipeline or a coating sprayed on the surface of a metal pipeline to enhance self-cleaning and antibacterial functions of plastics or the metals.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a preparation method and application of a nano-rod zinc oxide material. Background technique [0002] Now large-scale central air conditioners are installed in public places such as shopping malls, hotels, and office buildings. , These particle pollutants breed a large number of harmful substances such as microorganisms, bacteria, fungi, and inhalable particles, which are sent indoors through the air supply duct, seriously affecting indoor air quality, and bringing great harm to people's health. As early as 2004, the Ministry of Health conducted sampling inspections of central air conditioners in nearly a thousand hotels, shopping malls and other public places in more than 60 cities across the country. The results showed that the health pass rate was only 6.2%. [0003] Since the cleaning of ventilation ducts is extremely inconvenient, it is imminent to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G9/02B82Y40/00C08K9/06C08K7/00C08K3/22C09D5/14B05D7/14
CPCB05D7/14B82Y40/00C01G9/02C01P2004/03C01P2004/16C08K3/22C08K7/00C08K9/06C08K2003/2296C08K2201/011C09D5/14
Inventor 单加维
Owner 北京振兴华龙制冷设备有限责任公司
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