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A kind of oyster shell-baking soda antibacterial material and its preparation method and use method

An antibacterial material, baking soda technology, applied in cleaning methods and utensils, botany equipment and methods, chemical instruments and methods, etc., can solve problems such as rising production costs, low activity of shell powder, and insufficient porosity, and achieve production costs Low, excellent chemical activity, easy to use effect

Active Publication Date: 2018-03-23
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, on the one hand, the above-mentioned technical solution has high calcination temperature, high energy consumption, low activity of shell powder after calcination, and insufficient porosity; on the other hand, it needs to add 7-9% of the total weight of the material. Chitin, which accounts for 4-6% of the total weight of the material, has caused a further increase in its production cost, and the soaked and blanched vegetables, melons and fruits need to be rinsed with a large amount of water before they can meet the requirements for safe consumption

Method used

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  • A kind of oyster shell-baking soda antibacterial material and its preparation method and use method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Oyster shell-baking soda antibacterial material is prepared as follows:

[0040] In the first step, the oyster shells that have been naturally fermented and purified are first cleaned with clean water, then dried in the sun or in the shade under natural ventilation conditions, and finally crushed to particles with a particle size of 0.4-1.5mm to make raw meal;

[0041] In the second step, the above-mentioned raw material is put into a high-temperature furnace, and the clinker is obtained by a three-stage stepped heating calcination method; the specific calcination steps are as follows:

[0042] First, heat up to 300°C at a heating rate of 2°C / min, and then keep it warm for 10 minutes;

[0043] Then, continue to heat up to 650°C at a heating rate of 5°C / min, keep warm for 15 minutes, and then ventilate and cool down to 600°C;

[0044] Then raise the temperature to 810°C at a heating rate of 10°C / min, and keep it warm for 40 minutes; then, ventilate and cool it down to 7...

Embodiment 2

[0047] Oyster shell-baking soda antibacterial material is prepared as follows:

[0048] In the first step, the oyster shells that have been piled up for natural fermentation and purification are cleaned with clean water, then dried in the sun or in the shade under natural ventilation conditions, and then crushed to particles with a particle size of 1.5-3.5mm to make raw meal;

[0049] In the second step, the above-mentioned raw material is put into a high-temperature furnace, and the clinker is obtained by a three-stage stepped heating calcination method; the specific calcination steps are as follows:

[0050] First raise the temperature to 350°C at a heating rate of 2°C / min, and then keep it warm for 10 minutes;

[0051] Then, continue to heat up to 650°C at a heating rate of 5°C / min, keep warm for 20 minutes, and then ventilate and cool down to 600°C;

[0052] Then raise the temperature to 830°C at a heating rate of 10°C / min, and keep it warm for 20 minutes; then, ventilate a...

Embodiment 3

[0055] Oyster shell-baking soda antibacterial material is prepared as follows:

[0056] The first step is to wash the oyster shells that have been naturally fermented and purified with clear water, then dry them in the sun or in the shade under natural ventilation, and then crush them to particles with a particle size of 1.0-2.5mm to make raw meal;

[0057] In the second step, the above-mentioned raw material is put into a high-temperature furnace, and the clinker is obtained by a three-stage stepped heating calcination method; the specific calcination steps are as follows:

[0058] First raise the temperature to 320°C at a heating rate of 2°C / min, then keep it warm for 10 minutes;

[0059] Then, continue to heat up to 650°C at a heating rate of 5°C / min, keep warm for 15 minutes, and then ventilate and cool down to 600°C;

[0060] Then raise the temperature to 820°C at a heating rate of 10°C / min, and keep it warm for 30 minutes; then, ventilate and cool it down to 750°C, and ...

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Abstract

The invention discloses an oyster shell-baking soda antibacterial material and a preparation method and a using method thereof. The oyster shell-baking soda antibacterial material is mixture of oyster shell powder with grain size below 50mu m and food-grade baking soda powder, wherein the weight ratio of the oyster shell powder to the food-grade baking soda powder is 1:(0.5-1); the oyster shell powder has a loose porous structure and is high-activity powder prepared by using oyster shells as raw materials through calcination and grinding. The preparation method adopts a three-stage stepped temperature increasing calcination process to prepare clinker to obtain the loose porous structure and high chemical activity; the using method for removing residual pesticide in agricultural products is simple, safe and high-efficiency, and no secondary pollution is caused. Compared with the prior art, the oyster shell-baking soda antibacterial material has the characteristics of low cost, energy saving, environmental protection, high safety in use, high efficiency in residual pesticide removal and sterilization, environmental friendliness and the like, and is applicable to cleaning of various fruits and vegetables.

Description

technical field [0001] The invention relates to an antibacterial material, a preparation method and a use method thereof, in particular to an oyster shell-baking soda antibacterial material, a preparation method and a use method for removing pesticide residues in agricultural products, and belongs to the technical field of oyster shell modification. Background technique [0002] There are many types of marine shellfish in my country, and the output in 2014 reached 14 million tons. Among them, oyster production is the largest, with an annual output of 4.1 million tons. The shell weight of oysters accounts for more than 75% of the total weight of oysters. That is to say, my country will produce about more than 3 million tons of oyster shells every year. [0003] If oyster shell solid waste is discarded into the natural environment, it will not only have a negative impact on the aesthetics of the environment, but also occupy a large amount of available land. Life. [0004] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11D7/60C11D7/12C11D7/46A01N63/02A01P1/00A01P3/00B08B3/08A01N59/00
CPCY02A50/30
Inventor 李子超郭培志李群王越马苗孙小璐陆香珍乔银楠许春芳
Owner QINGDAO UNIV
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