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A kind of preparation method of polyamide quartz crystal chip

A quartz crystal and polyamide technology, applied in polyamide coatings, chemical instruments and methods, and the use of material absorption and weighing, can solve problems that cannot represent the surface properties of polyamide nanofiltration membranes

Inactive Publication Date: 2018-11-02
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, the commercialized quartz crystal chip cannot represent the surface performance of the actual polyamide nanofiltration membrane, which is the main reason why the dissipative quartz crystal microbalance technology has not been widely used in the field of membrane fouling.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] A preparation method of a polyamide quartz crystal chip, comprising the following steps:

[0030] 1) Gold substrate pretreatment: immerse the gold substrate in trichlorotrifluoroethane, acetone and ethanol in sequence, ultrasonically treat at 20-30°C for 10-20min, then rinse with ultrapure water and dry with flowing nitrogen, and finally Put the gold substrate under a UV lamp with a power of 30-40w and a wavelength of 185nm for 10-30min and set aside;

[0031] 2) Aminated gold substrate surface:

[0032] First prepare the 2-aminoethanethiol amination solution: dissolve 2-aminoethanethiol in ethanol to obtain a 2-aminoethanethiol amination solution with a concentration of 1-2 mM, and set it aside.

[0033] At an ambient temperature of 24-26°C, immerse the clean gold substrate obtained in step 1) in the 2-aminoethanethiol amination solution for 12-24 hours. After taking it out, wash it with ethanol and Isopar-G in order to remove the surface Excess 2-aminoethanethiol wa...

Embodiment 1

[0042] The gold substrate was sequentially immersed in trichlorotrifluoroethane, acetone, and ethanol, and ultrasonically treated at 25°C for 10 min, then rinsed with ultrapure water, dried with flowing nitrogen, and finally the gold substrate was placed under a power of 30w, 20min under the ultraviolet lamp with a wavelength of 185nm, stand-by.

[0043] Dissolve 2-aminoethanethiol in ethanol to obtain a 2-aminoethanethiol amination solution with a concentration of 1 mM, which is ready for use. Dissolve trimesoyl chloride and m-phenylenediamine in Isopar-G and N,N-dimethylacetamide respectively to obtain polymerization reaction solutions with mass concentrations of 0.3% and 5%, respectively, for use.

[0044] At 25°C, immerse the obtained clean gold substrate in the 2-aminoethanethiol amination solution for 24 hours, wash it with ethanol and Isopar-G in sequence after taking it out, and dry it with nitrogen gas to obtain the aminated gold substrate. stand-by.

[0045] Instal...

Embodiment 2

[0050] The gold substrate was sequentially immersed in trichlorotrifluoroethane, acetone, and ethanol, and ultrasonically treated at 20°C for 20 min, then rinsed with ultrapure water, dried with flowing nitrogen, and finally the gold substrate was placed in a power 40w, 10min under the ultraviolet lamp with a wavelength of 185nm, set aside.

[0051] Dissolve 2-aminoethanethiol in ethanol to obtain a 2-aminoethanethiol amination solution with a concentration of 1.5 mM, which is ready for use. Dissolve trimesoyl chloride and m-phenylenediamine in Isopar-G and N,N-dimethylacetamide respectively to obtain polymerization reaction solutions with mass concentrations of 0.6% and 8%, respectively, for use.

[0052] At 24°C, immerse the obtained clean gold substrate in the 2-aminoethanethiol amination solution for 18 hours, wash it with ethanol and Isopar-G in sequence after taking it out, and dry it with nitrogen gas to obtain the aminated gold substrate. stand-by.

[0053] Install t...

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Abstract

The invention discloses a preparation method of a polyamide quartz crystal chip. The preparation method comprises the following steps of: firstly using an organic solvent to pretreat a gold-based piece by combination with irradiation of an ultraviolet lamp, cleaning with ultra-pure water, and drying with nitrogen for spare use; then immersing the clean gold-based piece into 2-aminoethanethiol amination solution to carry out amination, thereby obtaining an aminated gold-based piece for spare use; then coating trimesoyl chloride and m-phenylenediamine polymerization reaction solution on the surface of the aminated gold-based piece in sequence by multi-period centrifugal spin coating; then placing the gold-based piece in a constant-temperature environment for heat treatment to obtain the polyamide quartz crystal chip; and finally, adopting a physico-chemical method to realize recycling of the gold-based piece. The preparation method disclosed by the invention has the advantages that a polyamide function layer with the nanoscale thickness is uniformly combined on the surface of the gold-based piece to obtain the polyamide quartz crystal chip. The preparation method is simple in operation and high in practicability, and can be widely used in analysis of the absorption behavior and mechanism for the polluted surface of a polyamide nanofiltration membrane.

Description

technical field [0001] The invention belongs to the field of quartz crystal microbalance chip development, and mainly relates to a preparation method of a polyamide quartz crystal chip. Background technique [0002] Nanofiltration membrane is a new type of separation membrane developed in the 1980s. Its performance is between ultrafiltration membrane and reverse osmosis membrane. High-valent ions and organic compounds with a relative molecular weight above 200Da have a high rejection rate. Most of the commercial nanofiltration membranes are successfully applied to polyamide nanofiltration membranes, which have the advantages of high salt rejection, large flux, and low operating pressure requirements. The amide groups in polyamides induce strong intramolecular and intermolecular hydrogen bonds, making polyamides have extremely high mechanical strength; The yoke system makes it have excellent physical and chemical stability. Therefore, the polyamide nanofiltration membrane ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D65/10C08G69/26G01N5/02C09D177/06C23C22/00
CPCB01D61/027B01D65/10C08G69/26C09D177/06C23C22/00G01N5/02
Inventor 王磊王佳璇苗瑞吕永涛张一李珍贤刘婷婷王旭东
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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