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Method for preparing granulate and sheetlike fluorescence labeling microplastics

A technology for fluorescent labeling and microplastics, which is applied in the field of preparation of granular and flake fluorescent labeling microplastics. It can solve the problem that plastic microspheres with uniform shape cannot simulate microplastics well, and achieve uniform shape and simple operation.

Active Publication Date: 2017-09-15
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Purpose of the invention: The technical problem to be solved by the present invention is aimed at the deficiencies of the prior art. At the current stage, the use of uniformly shaped plastic microspheres in the research on the toxicity of microplastics cannot well simulate the current situation of microplastics of different shapes in the environment. A method for preparing granular and flake fluorescently labeled microplastics, prepared by banburying and crushing

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  • Method for preparing granulate and sheetlike fluorescence labeling microplastics
  • Method for preparing granulate and sheetlike fluorescence labeling microplastics
  • Method for preparing granulate and sheetlike fluorescence labeling microplastics

Examples

Experimental program
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Embodiment 1

[0032] Preparation of polystyrene fluorescently labeled microplastics in the form of granules and flakes:

[0033] (1) Mix 48g of polystyrene particles with 1.92g of Thioindigo dye at one time, inject it into the feed port of the torque rheometer, set the temperature at 190°C, and set the time for 5min, and fluorescently label the polystyrene, the obtained Fluorescently labeled polystyrene, such as figure 2 shown;

[0034] (2) Take about 100 mg of fluorescently labeled polystyrene obtained in step (1) each time, place it on a flat vulcanizing machine for tableting, set the temperature at 180°C, and press at 5 MPa, and press it into a sheet with a thickness of 10 μm shaped plastics, such as image 3 shown;

[0035] (3) Use a high-speed pulverizer to pulverize the two kinds of fluorescently labeled polystyrene obtained in the above steps (1) and (2), pulverize 4 times, and pulverize each time for 5 minutes to obtain granular and flake polystyrene fluorescent polystyrene resp...

Embodiment 2

[0038] Preparation of granular and flake polyethylene fluorescently labeled microplastics:

[0039] (1) Mix 48g of polyethylene particles with 3.6g of Thioindigo dye at one time, inject it into the feed port of the torque rheometer, set the temperature at 180°C, and set the time for 6min to fluorescently label the polyethylene, and the resulting fluorescently labeled polyethylene;

[0040] (2) Take about 80 mg of the fluorescently labeled polyethylene obtained in step (1) each time, place it on a flat vulcanizing machine for tableting, set the temperature at 160 ° C, and press at 4 MPa, and press it into a sheet with a thickness of 8 μm plastic;

[0041] (3) Use a high-speed pulverizer to pulverize the two kinds of fluorescently labeled polyethylene obtained in the above steps (1) and (2), pulverize 3 times, and pulverize each time for 3 minutes to obtain granular and flake-shaped polyethylene fluorescent microplastics respectively .

[0042] (4) The two microplastics are w...

Embodiment 3

[0044] Preparation of fluorescently labeled polypropylene microplastics in the form of granules and flakes:

[0045](1) Mix 48g of polypropylene particles with 4.8g of Thioindigo dye at one time, inject it into the feeding port of the torque rheometer, set the temperature at 190°C, and the time is 8min, and carry out fluorescent labeling on polypropylene, and the obtained fluorescent labeling polypropylene;

[0046] (2) Take about 90 mg of fluorescently labeled polypropylene obtained in step (1) each time, place it on a flat vulcanizing machine for tableting, set the temperature at 180°C, and press at 3 MPa, and press it into a sheet with a thickness of 12 μm plastic;

[0047] (3) Use a high-speed pulverizer to pulverize the two fluorescently labeled polypropylenes obtained in the above steps (1) and (2), pulverize 5 times, and pulverize each time for 4 minutes to obtain granular and flake-shaped polypropylene fluorescent microplastics respectively .

[0048] (4) The two mi...

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Abstract

The invention discloses a method for preparing granulate and sheetlike fluorescence labeling microplastics. The method comprises the steps that plastics are mixed with dye; and after fluorescence labeling, tabletting, pulverization and dispersion are conducted on the plastics through an enclosed mixing process, filter sieving is conducted, so that the granulate and sheetlike fluorescence labeling microplastics within different granule size ranges are obtained. By means of the method, the fluorescent microplastics which exist in the environment generally and are in different shapes can be obtained conveniently and quickly; the distribution and enrichment rules of the microplastics in different shapes in environmental media and organism bodies can be analyzed in a qualitative and quantitative manner conveniently; and the method can be widely applied to ecological environment risk research of various microplastics.

Description

technical field [0001] The invention relates to a method for preparing granular and flake-shaped fluorescently labeled microplastics. The prepared microplastics are used for qualitative and quantitative analysis of the distribution and enrichment rules of microplastics of different shapes in environmental media and organisms, and can be widely used. Research on the ecological and environmental risks of various microplastics belongs to the field of polymer material preparation. Background technique [0002] Microplastics refer to plastic particles with a diameter of less than 5mm. Plastic pollution has become a major problem in the ocean due to the increasing production of plastics and the fact that they are difficult to degrade. Ultraviolet radiation and mechanical abrasion can degrade plastics into small-sized microplastics, and the potential environmental health risks of microplastics have been paid more and more attention. Literature research found that in the actual en...

Claims

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Application Information

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IPC IPC(8): B29B9/04B29B13/10B29B7/88B29C35/02
CPCB29B7/88B29B9/04B29B13/10B29C35/02
Inventor 张宴乔如霞任洪强
Owner NANJING UNIV
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