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Device and method for measuring the loading depth of functional groups on the channel surface of modified porous materials

A technology of surface functional groups and porous materials, which is applied in the field of devices for measuring the loading depth of functional groups on the surface of modified porous materials, can solve the problems of expensive instruments, many restrictions on porous materials and modified functional groups, and complicated operations, and can reduce the time and cost. The effect of cost consumption, simple operation steps, and less restriction requirements

Active Publication Date: 2021-02-02
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has obvious defects. First, the equipment is expensive and the operation is complicated; second, there are many restrictions on the porous material and the modified functional group. Fluorescent probes undergo a 1:1 chemical reaction

Method used

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  • Device and method for measuring the loading depth of functional groups on the channel surface of modified porous materials
  • Device and method for measuring the loading depth of functional groups on the channel surface of modified porous materials
  • Device and method for measuring the loading depth of functional groups on the channel surface of modified porous materials

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A device for measuring the loading depth of functional groups on the channel surface of modified porous materials, the structure of which is as follows: figure 1 As shown, it includes a gas mixing chamber 7 connected in sequence, a packed column 13 for filling the modified porous material to be measured, and a gas analyzer 17 for analyzing the gas concentration, wherein the inlet of the gas mixing chamber 6 is connected with high-purity nitrogen gas The device 2 is connected with the gas generator 1 to be tested, the outlet of the gas generator 1 to be tested is equipped with a pressure reducing valve 3, and the first flow regulator 4 is installed on the pipeline, and finally leads to an inlet of the first three-way valve 6, The outlet of the high-purity nitrogen generator 2 is equipped with a pressure reducing valve 3, and a second flow regulator 5 is installed on the pipeline, which finally leads to another inlet of the first three-way valve 6, and the outlet of the fi...

Embodiment 2

[0048] Adopt the device identical with embodiment 1, concrete operation is as follows:

[0049] 0.5 g of the amine-modified porous material was placed in a packed column with a length of 0.5 cm and an inner diameter of 0.7 cm. Both ends of the packed column were tightly plugged with silanized glass wool and placed in a thermostatic control box. The gas mixing box is connected upstream of the packed column, and the two gas inlets of the gas mixing box are respectively connected to high-purity nitrogen and 100ppm SO 2 gas. Connect the downstream of the packed column to SO 2 Gas analyzer, which can monitor SO online in real time 2 concentration. do SO 2 Before the adsorption experiment, under the condition of 80°C, high-purity nitrogen gas was passed into the packed column at a flow rate of 300mL / min for 1 hour to fully remove the impurities adsorbed by the amine-based modified porous material. After passing high-purity nitrogen for 1 hour, under the condition of 25°C, flow...

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Abstract

The invention relates to a device and method for measuring the loading depth of functional groups on the surface of pores of modified porous materials. instrument, the inlet of the gas mixing chamber is connected to the high-purity nitrogen generator and the gas generator to be tested, the two ends of the packed column are blocked and inserted into a conduit for ventilation or exhaust, and the packed column is provided with a bypass in parallel tube, and the inlet pipe of the packed column is provided with a valve, and a third flow regulator is provided in front of the gas mixing chamber and the packed column. Compared with the prior art, the equipment required by the present invention is common, the operation steps are simple, the time and cost of measurement are greatly reduced, and there are few restrictions on porous materials and modified functional groups. It is suitable for most surface functional groups modified porous Measurement Characterization of Materials.

Description

technical field [0001] The invention relates to the field of air purification and environmental protection material development, in particular to a device and method for measuring the loading depth of functional groups on the channel surface of modified porous materials. Background technique [0002] Since the invention of porous materials, it has attracted the attention of many scholars rapidly due to its unique pore structure. Commonly used porous materials include activated carbon, activated carbon fibers, carbon nanotubes, zeolites, molecular sieves, and macroporous adsorption resins. Due to their advantages such as large specific surface area, high porosity, and rich pore diameter, they are widely used in adsorption, catalysis, chromatography, Gas separation, energy storage and other fields. Surface functional group modification is an important means to improve the application performance of porous materials. By loading or grafting different types of chemical function...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N7/04G01B13/14
CPCG01B13/14G01N7/04
Inventor 徐斌于霄郝晋靓
Owner TONGJI UNIV
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