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A kind of anti-WSSV membrane material and preparation method thereof

A technology of membrane material and membrane casting solution, which is applied in the field of anti-WSSV membrane material and its preparation, can solve the problems of no effective method, infection of cultured prawns, and influence on growth and development, and achieve shortened cleaning time, tolerance to natural seawater immersion, Strong anti-pollution effect

Active Publication Date: 2020-11-20
陕西麦可罗生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) The use of a large number of disinfectants to kill free WSSV in the prawn breeding water will inevitably affect the growth and development of the prawns in the aquaculture water. These disinfectants remain in the prawns and also affect people's health;
[0007] (2) The prawn breeding pond is a relatively closed environment, but due to frequent water changes during the prawn cultivation process, WSSV that is free in the water or adsorbed on phytoplankton enters the prawn cultivation pond with the water change, thereby further infecting the cultured prawns;
[0008] (3) Regarding the control of WSSV, especially the control of WSSV free in water bodies, there is no effective method so far

Method used

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  • A kind of anti-WSSV membrane material and preparation method thereof
  • A kind of anti-WSSV membrane material and preparation method thereof
  • A kind of anti-WSSV membrane material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0042] This embodiment discloses the preparation method of anti-WSSV membrane material, adopts following steps:

[0043] (1) Prepare the casting solution according to the composition of the membrane material casting solution:

[0044] Polyvinylidene fluoride (PVDF) 10.0~16%; polyvinylpyrrolidone (PVP) 4.0%; calcium zinc heat stabilizer dose 1.0%; adjust the mass percentage to 100 each time with N, N-dimethylacetamide (DMAC) solvent %;

[0045] (2) Weigh each formula drug according to the above mass percentage;

[0046] (3) After the stirring is completed, the mixture has been completely dissolved to form a homogeneous casting solution, which is placed in an oven at 70°C for 24 hours for defoaming;

[0047] (4) Put a piece of paper on the floor of the scraping machine to prevent the glass plate from sliding, put the glass plate on the paper, use the screw micrometer head and the slider to adjust the height of the scraper to set the thickness of the scraping film, stick it wit...

Embodiment 2

[0068] In order to further determine the mass percentage of modifier PEG400 on the basis of example 1.

[0069] The configuration of the casting solution is as follows:

[0070] Polyvinylidene fluoride (PVDF) 10.0-16%; polyvinylpyrrolidone (PVP) 4.0%; calcium zinc heat stabilizer 1.0%; modifier PEG400 3.0-9.0%; The amide (DMAC) solvent adjusts the mass percentage of the casting solution to 100%.

[0071] (1) Viscosities of PEG / PVDF membranes with different concentration ratios

[0072] When the mass fraction of PEG400 is 3.0-9.0%, the viscosity of the PEG / PVDF film increases to a certain extent, but the increased viscosity is not very large. When the mass fraction of PEG400 is 3.0%, the mass fraction of PEG400 is 3.0%. Membrane fluid mixes best with other substances.

[0073] (2) Film thickness and tensile strength of PVDF / PEG modified film

[0074]

[0075] It can be seen from Table 2.1 that the thickness of the modified film changes without obvious rules, and there is...

Embodiment 3

[0083] On the basis of examples 1 and 2, in order to further consider the addition of CuSO to the casting solution 4 The effect on the removal rate of free virus WSSV, a casting solution: the mass fraction of polyvinylidene fluoride is 13%, polyvinylpyrrolidone (wt) is 4%, DMAC (wt) is 78.5-79.5%, calcium zinc heat stabilizer (wt) is 1%, PEG400 (wt) is 3%, CuSO 4 The mass fraction of polyvinylidene fluoride is 0.5 to 1.5%, and another casting solution: polyvinylidene fluoride is 13%, polyvinylpyrrolidone (wt) is 4%, DMAC (wt) is 79%, calcium zinc heat stabilizer ( wt) is 1%, PEG400 (wt) is 3%. Tubular membranes were prepared from two casting solutions (the pore size of both membranes was 0.22 μm), and the initial virus concentration of WSSV configured was determined by fluorescent quantitative PCR. The initial prawn WSSV filtrate was filtered through the two tubular membrane cups , the removal effect on WSSV is shown in Table 3.1.

[0084] Table 3.1 Changes in the number of...

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Abstract

The invention relates to an anti-WSSV (White Spot Syndrome Virus) membrane material and a preparation method thereof. The anti-WSSV membrane material is prepared from the following components in massfraction in a membrane casting solution, 10.0 to 16.0 percent of polyvinylidene fluoride (PVDF), 2.0 to 4.0 percent of polyvinyl pyrrolidone (PVP), 76.0 to 79.0 percent of N,N-dimethylacetamide (DMAC), 0.5 to 1.5 percent of Ag2SO4 or CuSO4, 0.3 to 1.0 percent of calcium-zinc heat stabilizer, and 1.0 to 3.0 percent of modifier PEG400. By utilizing the membrane material, a dissociative WSSV in a prawn farming water body can be effectively removed, the prawn farming cost is reduced, and the prawn farming survival rate and the yield are improved.

Description

technical field [0001] The invention belongs to the technical field of biological virus removal, and in particular relates to an anti-WSSV membrane material and a preparation method thereof. Background technique [0002] With the rapid development of my country's economy, my country's mariculture industry has also developed rapidly. The development speed and achievements of my country's mariculture industry have also attracted the attention of the world. However, in the process of rapid development of my country's mariculture industry, a series of problems have emerged one after another. , Environmental deterioration, virus breeding, these are the reasons that prevent the development of my country's mariculture industry. [0003] There are many kinds of marine viruses, and their morphology and genetics are diverse. The number of marine viruses in seawater is more in the ocean light layer. As the depth of seawater increases, the number of marine viruses gradually decreases, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D71/34C02F1/44C02F103/20
CPCB01D67/0079B01D71/34C02F1/44C02F2103/20
Inventor 潘忠成李蒲民
Owner 陕西麦可罗生物科技有限公司