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An Ultrasonic-Piezoelectric Collaborative Sterilization Technology

An ultrasonic and micro-piezoelectric technology, applied in the fields of titanium compounds, disinfection, chemical instruments and methods, etc.

Inactive Publication Date: 2019-04-12
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no relevant report on the application of piezoelectric technology to sterilization

Method used

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  • An Ultrasonic-Piezoelectric Collaborative Sterilization Technology
  • An Ultrasonic-Piezoelectric Collaborative Sterilization Technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Take 40 ml of butyl titanate slowly drop into 400 ml of 1mol / L acetic acid solution, stir it magnetically for 72 hours at room temperature, and then centrifuge at 5000 rpm / min for 10 min. Discard the supernatant, wash the precipitate with ultrapure water and absolute ethanol in turn until neutral, then dry at 60°C, grind, and pass through a 200-mesh sieve to obtain titanium hydroxide.

[0045] Take this titanium hydroxide and Ba(OH) 2 ·8H 2 O was added to 0.25 mol / L NaOH solution in molar ratio Ti:Ba=1:1 to its concentration of 0.06 mol / L, after magnetic stirring was uniform, it was transferred to a hydrothermal reaction kettle with polytetrafluoroethylene liner. The hydrothermal reaction was carried out in a high-precision oven at a heating rate of 3 °C / min to 200 °C for 68 h. After cooling down to room temperature at 3 °C / min, centrifuge at 5000 rpm / min for 10 min, discard the supernatant, and then wash the precipitate with deionized water and absolute ethanol to ne...

Embodiment 2

[0048] Take 50 ml of butyl titanate slowly drop into 500 ml of 1mol / L acetic acid solution, stir magnetically at room temperature for 72 hours, and centrifuge at 5000 rpm / min for 10 minutes. Discard the supernatant, wash the precipitate with ultrapure water and absolute ethanol in turn until neutral, then dry at 60°C, grind, and pass through a 200-mesh sieve to obtain titanium hydroxide.

[0049] Take this titanium hydroxide and Ba(OH) 2 ·8H 2 O is added to the 0.25mol / L NaOH solution at a molar ratio of Ti: Ba = 1:1 to a concentration of 0.06 mol / L, and then SnCl equivalent to 2% of the molar ratio of Ti is added. 2 2H 2 O, after magnetically stirring evenly, transfer to a hydrothermal reaction kettle with a polytetrafluoroethylene liner, and conduct a hydrothermal reaction in a high-precision oven at a heating rate of 3°C / min to 200°C for 68h. After cooling down to room temperature at 3°C / min, centrifuge at 5000 rpm / min for 10min, discard the supernatant, and then wash th...

Embodiment 3

[0052] Take 60 ml of butyl titanate slowly dropwise into 600 ml of 1mol / L acetic acid solution, stir magnetically at room temperature for 72 h, and centrifuge at 5000 rpm / min for 10 min. Discard the supernatant, wash the precipitate with ultrapure water and absolute ethanol in turn until neutral, then dry at 60°C, grind, and pass through a 200-mesh sieve to obtain titanium hydroxide.

[0053] Take this titanium hydroxide and Ba(OH) 2 ·8H 2 O was added to 0.25 mol / L NaOH solution at a molar ratio of Ti: Ba=1:1 to a concentration of 0.06 mol / L, and after magnetic stirring was uniform, it was transferred to a hydrothermal reactor with a polytetrafluoroethylene liner. The hydrothermal reaction was carried out in a high-precision oven at a heating rate of 3 °C / min to 200 °C for 68 h. After cooling down to room temperature at 3 °C / min, centrifuge at 5000 rpm / min for 10 min, discard the supernatant, and then wash the precipitate with deionized water and absolute ethanol to neutrali...

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Abstract

The invention discloses an ultrasonic-piezoelectric synergetic sterilization technology, and relates to tetragonal phase BaTiO3, BaxY1-xTiO3, M@BaTiO3 or M@BaxY1-xTiO3 made of nano-micro piezoelectric materials, a preparation method thereof and an application thereof in sterilization, wherein Y is Sr<2+>, Sn<2+> or Ce<4+> and the like, M is Ag, Au, Pt or Pd and the like, and the piezoelectric sterilization efficiency is enhanced by effects of peak shifting, silver firing-like addition and the like. The ultrasonic-piezoelectric synergetic sterilization technology utilizes the own cavitation effect of ultrasonic waves for sterilization, also utilizes the cavitation effect to excite the nano-micro piezoelectric materials to generate cavities and active-oxygen free radicals so as to achieve the effect of synergetic sterilization. The ultrasonic-piezoelectric synergetic sterilization technology disclosed by the invention can convert mechanical energy into chemical energy for effective sterilization by utilizing simple piezoelectric materials and compound piezoelectric materials, not only can improve the efficiency of ultrasonic sterilization greatly, but also can utilize low-frequency vibrating mechanical energy widely existing in the natural environment, and is an environmental-friendly sterilization technology.

Description

technical field [0001] The invention belongs to the technical field of sterilization. More specifically, it relates to an ultrasonic-piezoelectric collaborative sterilization technology. Background technique [0002] With the in-depth study of microorganisms, people have a better understanding of the diseases caused by many microorganisms, and the research and development of effective sterilization technology has become a very important topic. [0003] Ultrasound is a new physical sterilization method. When ultrasonic waves propagate in the medium, it will cause a series of special effects, such as mechanical effects and cavitation effects, which will damage the cell structure. A small amount of free radicals formed in the cavitation effect can also Destroys biological matter such as DNA, killing microorganisms. However, the sterilization efficiency of ultrasonic, especially low-frequency ultrasonic is not high, so it is often used in combination with other methods. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61L2/025A61L2/02C01G23/00
CPCA61L2/02A61L2/025C01G23/006
Inventor 熊亚付尧冯锦茜田双红
Owner SUN YAT SEN UNIV