Device and method for testing degradation rate of biodegradable high polymer material in soil

A polymer material and biodegradable technology, applied in the field of biodegradable polymer materials, can solve the problems of high cost, complex structure, low test accuracy, etc., and achieve the effect of reducing test cost, simplifying test process and improving test accuracy

Pending Publication Date: 2022-04-05
ZHONGBEI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a testing device for the degradation rate of biodegradable polymer materials in soil in order to solve the technical problems of complex structure, high cost and low test accuracy of existing measuring devices for the degradation performance and degradation rate of biodegradable polymer materials

Method used

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  • Device and method for testing degradation rate of biodegradable high polymer material in soil
  • Device and method for testing degradation rate of biodegradable high polymer material in soil
  • Device and method for testing degradation rate of biodegradable high polymer material in soil

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Experimental program
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Embodiment 1

[0039] Such as figure 1 As shown, the present invention proposes a testing device for the degradation rate of biodegradable polymer materials in soil, including an air intake area, a water intake area, a leaching area, a filtrate collection area, and a gas collection area. Wherein the intake area includes a miniature compressed air pump 1, which is used to continuously and stably feed the air flow into the whole device; the first CO 2 Absorber bottle 2, which contains dry soda lime or strong alkali aqueous solution, used to absorb CO in the air stream 2 ;CO 2 Indicating bottle 3, which contains barium hydroxide solution, can judge whether there is CO mixed in the air flow through the turbidity 2 . The water inlet area is an external water distributor 4, which is equipped with eluent with a set pH value, and can realize stable continuous or intermittent liquid inlet through the peripheral liquid inlet control valve 4-1. The leaching zone is composed of a hollow leaching dev...

Embodiment 2

[0041] A kind of testing method that utilizes the degradation rate testing device for the biodegradable polymer material in soil described in embodiment 1, comprises the steps:

[0042] S1. According to the actual test purpose and experimental conditions, select the corresponding soil and eluent to obtain the desired biodegradation conditions of the biodegradable polymer material, and mix the biodegradable polymer material sample 5-1 with a certain height of soil Mix well and place all devices according to figure 1 Install.

[0043] S2. Turn on the micro compressed air pump 1, the liquid inlet control valve 4-1, the mechanical stirring device 6 and the leachate control valve 5-4, and set the intake air flow, liquid inlet flow, agitator speed and The liquid flow rate enables the biodegradable polymer material to biodegrade in the soil under the set conditions.

[0044] S3. regularly collect the leachate in the filtrate collection container 7 and the second CO in the gas colle...

Embodiment 3

[0058] A kind of testing method that utilizes embodiment 1 to be used for biodegradable macromolecule material degradation rate testing device in soil, comprises the steps:

[0059] S1. Study the biodegradation performance of cellulose biodegradable polymer materials in Taiyuan area. The cellulose powder containing 100g of carbon was evenly mixed with 6Kg of the soil obtained from the farmland in the suburbs of Taiyuan, air-dried and sieved; column, the first CO 2 Fill the absorption bottle 2 with 20wt% sodium hydroxide solution, CO 2 Fill the indicator bottle 3 with 1wt% barium hydroxide solution, the second CO 2 Absorption bottle 8 and third CO 2 The sodium hydroxide solution that all packs 10wt% in the absorption bottle 9, the deionized water that loads pH=7 in the external water distributor 4, all devices are arranged according to figure 1 Install.

[0060] S2. Turn on the micro compressed air pump 1, the liquid inlet control valve 4-1, the mechanical stirring device ...

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Abstract

The invention relates to the field of biodegradable high polymer materials, in particular to a device and a method for testing the degradation rate of a biodegradable high polymer material in soil. According to the testing device and the testing method provided by the invention, the defect that a soil culture system in the existing testing standard and testing method for the biodegradability of the biodegradable high polymer material can only exchange gas with the outside can be overcome, and the biodegradation process of the biodegradable high polymer material in a natural soil environment can be really simulated; therefore, the biodegradability of the biodegradable high polymer material in the natural soil environment can be accurately evaluated. Besides, the test method disclosed by the invention can be used for conveniently sampling and testing the soil, the leachate and the gas, can solve the problem of complicated device construction in the prior art, and can be used for reducing the test cost, simplifying the test process and improving the test accuracy of the biodegradability of the biodegradable high polymer material in the soil.

Description

technical field [0001] The invention relates to the field of biodegradable polymer materials, in particular to a testing device and a testing method for the degradation rate of biodegradable polymer materials in soil. Background technique [0002] In order to alleviate the white pollution caused by non-degradable polymer materials, researchers proposed to use more environmentally friendly biodegradable polymer materials, such as cellulose, cellulose and polybutylene succinate, to replace traditional non-degradable plastics. The molecular backbone or side groups of these biodegradable polymer materials contain a large number of easily hydrolyzed groups, such as ester groups, amide groups, and hydroxyl groups, which can be recognized by microorganisms and completely degrade the polymer materials within a certain period of time. converted to CO 2 , mineralized inorganic salts of water and its elements, and microbial biomass. [0003] Landfilling is still the most commonly use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
CPCG01N33/442G01N1/24G01N1/38C12M1/00C12M1/02C12M1/12C12M1/04
Inventor 刘亚青陈泰安向阳赵贵哲
Owner ZHONGBEI UNIV
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