Evaluation device and permeation and diffusion performance evaluation method for soilless culture hydrogel membrane

A hydrogel membrane, soilless culture technology, used in measurement devices, diffusion analysis, permeability/surface area analysis, etc.

Pending Publication Date: 2020-10-30
SINOPEC CHANGCHENG ENERGY CHEM NINGXIA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there have been no reports on the evaluation device and evaluation method for hydrogel membranes for soilless cultivation. Therefore, the development of an evaluation device for hydrogel membranes for soilless cultivation and an evaluation method system for permeation and diffusion performance is beneficial to many organisms. The process and the application of hydrogel membranes in the field of soilless cultivation have important guiding significance

Method used

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  • Evaluation device and permeation and diffusion performance evaluation method for soilless culture hydrogel membrane
  • Evaluation device and permeation and diffusion performance evaluation method for soilless culture hydrogel membrane
  • Evaluation device and permeation and diffusion performance evaluation method for soilless culture hydrogel membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Potassium nitrate, sodium nitrate, magnesium nitrate, potassium chloride, sodium chloride, magnesium chloride, potassium sulfate, sodium sulfate and magnesium sulfate are configured into an ion standard nutrient solution with a concentration of 0.01~0.1mol / L, and these ions are used in the Different concentrations have different conductivity, draw the conductivity-concentration standard curve.

[0022] (2) Take two hydrogel membranes and swell in ultrapure water for 24 hours, then take out one piece and dry it and place it in a flat membrane module, add 500mL ultrapure water to the ultrapure water bottle, and add 500mL to the nutrient solution bottle with a concentration of 0.01mol / L nutrient solution, the speed of the peristaltic pump is adjusted to 300r / min, the temperature is controlled to 30°C, the speed of the stirrer is 300r / min, the side pressure of the nutrient solution is 0 MPa, and the device runs for 8 hours. Record the value of the conductivity meter eve...

Embodiment 2

[0025] (1) Potassium nitrate, sodium nitrate, magnesium nitrate, potassium chloride, sodium chloride, magnesium chloride, potassium sulfate, sodium sulfate and magnesium sulfate are configured into an ion standard nutrient solution with a concentration of 0.01~0.1mol / , and these ions are used in different Concentrations have different conductivity, and draw the conductivity-concentration standard curve.

[0026] (2) Take two hydrogel membranes and swell in ultrapure water for 18 hours, then take out one piece and dry it and place it in a flat membrane module, add 300mL ultrapure water to the ultrapure water bottle, and add 300mL concentration to the nutrient solution bottle. 0.03mol / L nutrient solution, the speed of the peristaltic pump is adjusted to 200r / min, the temperature is controlled to 200°C, the speed of the stirrer is 200r / min, the side pressure of the nutrient solution is 0.5MPa, and the device runs for 8 hours. Record the value of the conductivity meter every hour ...

Embodiment 3

[0029] (1) Potassium nitrate, sodium nitrate, magnesium nitrate, potassium chloride, sodium chloride, magnesium chloride, potassium sulfate, sodium sulfate and magnesium sulfate are configured into an ion standard nutrient solution with a concentration of 0.01~0.1mol / L, and these ions are used in the Different concentrations have different conductivity, draw the conductivity-concentration standard curve.

[0030] (2) Take two hydrogel membranes and swell in ultrapure water for 12 hours, then take out one piece and dry it and place it in a flat membrane module, add 400mL ultrapure water to the ultrapure water bottle, and add 400mL concentration to the nutrient solution bottle. 0.08mol / L nutrient solution, the peristaltic pump speed is adjusted to 300r / min, the temperature is controlled to 40°C, the stirrer speed is 300r / min, the side pressure of the nutrient solution is 1MPa, and the device runs for 8h. Record the value of the conductivity meter every hour and convert it into a...

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Abstract

The invention discloses an evaluation device and a permeation and diffusion performance evaluation method for a soilless culture hydrogel membrane. The device comprises a conductivity meter, an ultrapure water bottle, a peristaltic pump, a flow meter, a self-made membrane assembly, a nutrient solution bottle, a high-pressure constant-flow pump, a back pressure valve, a temperature meter, a stirrer, a water bath pool and a balance. According to the permeation and diffusion performance evaluation method for a hydrogel membrane, the environmental conditions of plants in the soilless culture process are simulated, and the permeation and diffusion performance and the like of nutrient ions and moisture reaching plant roots through the hydrogel membrane are dynamically tested by setting differentnutrient solution concentrations, operating pressure and other conditions. In the process of evaluating the performance of the soilless culture membrane, active absorption and passive absorption of root systems to chemical minerals in the plant growth process are reflected through the membrane process, the permeation and diffusion rule of ions in the hydrogel membrane for soilless culture is found, and the device and the method have important guiding significance for the soilless culture process of plants.

Description

technical field [0001] The invention belongs to the field of membrane technology, and in particular relates to an evaluation device for evaluating and testing the performance of hydrogel membranes for soilless cultivation and an evaluation method for permeation and diffusion performance. Background technique [0002] In recent years, a kind of hydrogel membrane for plant soilless cultivation has been developed abroad. This membrane has many nanopores whose size is strictly controlled. Plant roots grow and adhere to the upper surface of the membrane, and the nutrient solution flows from the membrane. water and ions are absorbed by the plant roots through the hydrogel membrane. [0003] Whether the nutrient ions in the nutrient solution can be supplied to the root system of the plant through the hydrogel membrane has a crucial impact on the growth of the plant. However, there are few related reports on the ion permeability of hydrogel membranes for soilless cultivation. Duri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08G01N13/00
CPCG01N13/00G01N15/08G01N2013/003
Inventor 张敏马文中周代红唐元唐宇虹季彦竹
Owner SINOPEC CHANGCHENG ENERGY CHEM NINGXIA CO LTD
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