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Ultrasonic-piezoelectric synergetic sterilization technology

An ultrasonic and micro piezoelectric technology, applied in the field of sterilization

Inactive Publication Date: 2016-12-07
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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  • Ultrasonic-piezoelectric synergetic sterilization technology
  • Ultrasonic-piezoelectric synergetic sterilization technology

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Take 40 ml of butyl titanate slowly drop it into 400 ml of 1mol / L acetic acid solution, stir it magnetically at room temperature for 72 hours, and centrifuge at 5000 rpm / min for 10 minutes. The supernatant was discarded, the precipitate was washed with ultrapure water and absolute ethanol to neutrality, dried at 60°C, ground, and passed through a 200-mesh sieve to prepare titanium hydroxide.

[0045] Take this titanium hydroxide and Ba(OH) 2 ·8H 2 O mole ratio Ti: Ba = 1:1 was added to the 0.25 mol / L NaOH solution to a concentration of 0.06 mol / L, after magnetic stirring, transferred to a hydrothermal reactor with PTFE lining, In a high-precision oven, the heating rate is 3 ℃ / min to 200 ℃ for hydrothermal reaction for 68 h. After cooling down to room temperature at 3 ℃ / min, centrifuge at 5000 rpm / min for 10 min, discard the supernatant, and then wash the precipitate with deionized water and absolute ethanol to neutrality, then dry, grind and grind at 60 ℃. Go through a 20...

Embodiment 2

[0048] Take 50 ml of butyl titanate slowly drop it into 500 ml of 1mol / L acetic acid solution, stir it magnetically at room temperature for 72 hours, and centrifuge at 5000 rpm / min for 10 minutes. The supernatant was discarded, the precipitate was washed with ultrapure water and absolute ethanol to neutrality, dried at 60°C, ground, and passed through a 200-mesh sieve to prepare titanium hydroxide.

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

Embodiment 3

[0052] Take 60 ml of butyl titanate slowly drop it into 600 ml of 1mol / L acetic acid solution, stir it magnetically for 72 h at room temperature, and centrifuge at 5000 rpm / min for 10 min. The supernatant was discarded, the precipitate was washed with ultrapure water and absolute ethanol to neutrality, dried at 60°C, ground, and passed through a 200-mesh sieve to prepare titanium hydroxide.

[0053] Take this titanium hydroxide and Ba(OH) 2 ·8H 2 O mole ratio Ti: Ba=1:1 was added to the 0.25mol / L NaOH solution to a concentration of 0.06 mol / L, after magnetic stirring, transferred to a hydrothermal reactor with a PTFE lining, In a high-precision oven, the heating rate is 3 ℃ / min to 200 ℃ for hydrothermal reaction for 68 h. After cooling down to room temperature at 3 ℃ / min, centrifuge at 5000 rpm / min for 10 min, discard the supernatant, and then wash the precipitate with deionized water and absolute ethanol to neutrality, then dry, grind and grind at 60 ℃. Go through a 200 mesh si...

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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 field of sterilization technology. More specifically, it relates to an ultrasonic-piezoelectric synergistic sterilization technology. Background technique [0002] With the in-depth research on microorganisms, people have developed more 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 trigger a series of special effects, such as mechanical effects and cavitation effects, which damage the cell structure. A small amount of free radicals formed in the cavitation effect can also Destroy biological materials such as DNA and cause the death of microorganisms. However, the sterilization efficiency of ultrasound, especially low-frequency ultrasound is not high, so it is often necessary to use it in combinati...

Claims

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Application Information

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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