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Method for plating silver on inner wall of quartz capillary

A technology of capillary and quartz glass, which is applied in the direction of liquid chemical plating, metal material coating process, coating, etc., can solve the problem of high price, and achieve the effect of low cost, environmental friendliness and mild reaction conditions

Active Publication Date: 2015-07-01
HUAZHONG NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some foreign countries have also mastered the process of silver coating on the inner wall of the capillary, and have corresponding products, but most of them are coated by physical methods, and the price is expensive.

Method used

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  • Method for plating silver on inner wall of quartz capillary
  • Method for plating silver on inner wall of quartz capillary
  • Method for plating silver on inner wall of quartz capillary

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Cut off a quartz glass capillary with an inner diameter of 300 microns and a length of 28 cm, and treat it with a plasma cleaning machine (200W power) for 5 minutes, then assemble a connector on one end, connect it to a peristaltic pump with a hose, and place the other end in the corresponding flow chamber. In the solution passing through the capillary, turn on the peristaltic pump, and use the peristaltic pump to sequentially extract isopropanol, silylating reagent and isopropanol at room temperature, and use the pressure difference generated by the peristaltic pump to make the isopropanol flow at 1.5mL·min-1 respectively. The flow rate of 0.32mL min-1 flows through the capillary for 3min, the silylating agent flows through the capillary for 1h at a flow rate of 0.32mL min-1, and isopropanol flows through the capillary for 3min at a flow rate of 1.5mL min-1, and the silylating reagent is 9 wt%. 3-Aminopropyl-trimethoxysilane in isopropanol and air-dried for 10 min. Con...

Embodiment 2

[0042] Cut off a quartz glass capillary with an inner diameter of 300 microns and a length of 28 cm, and use a plasma cleaning machine to treat the surface of the quartz glass capillary with hydroxylation, then assemble a connector on one end, connect it to a peristaltic pump with a hose, and place the other end in a corresponding waiting area. In the solution flowing through the capillary, turn on the peristaltic pump, and use the peristaltic pump to sequentially extract isopropanol, silylating reagent and isopropanol at room temperature, and use the pressure difference generated by the peristaltic pump to make the isopropanol flow at 1.6mL·min- A flow rate of 1 flows through the capillary for 3 minutes, a silylating reagent flows through the capillary for 1 hour at a flow rate of 0.33 mL min-1, and isopropanol flows through the capillary for 3 min at a flow rate of 1.5 mL min-1. The silylating reagent is 12 wt % 3-aminopropyl-trimethoxysilane in isopropanol solution, and then...

Embodiment 3

[0049] Cut off a quartz glass capillary with an inner diameter of 300 microns and a length of 28 cm, use a plasma cleaning machine to treat the surface of the quartz glass capillary to hydroxylate, then assemble a connector on one end, connect it to a peristaltic pump with a hose, and place the other end on the corresponding In the solution flowing through the capillary, turn on the peristaltic pump, and use the peristaltic pump to sequentially extract isopropanol, silanization reagent and isopropanol at room temperature, and use the pressure difference generated by the peristaltic pump to make the isopropanol flow at 1.7mL min The flow rate of -1 flows through the capillary for 5min, the silylating reagent flows through the capillary for 2h at a flow rate of 0.34mL min-1, and isopropanol flows through the capillary for 3min at a flow rate of 1.6mL min-1, and the silylating reagent is 10wt% 3-aminopropyl-trimethoxysilane in isopropanol solution, then air-dried for 10min. Conti...

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Abstract

The invention relates to a method for plating silver on an inner wall of a quartz glass capillary. The method comprises the following steps: surface hydroxylation for the quartz glass capillary; surface silanization; deposition for palladium nano-particles; chemical copper plating, namely enabling a chemical copper plating solution to flow through the capillary for at least 15min under the conditions of a flowing speed of 0.032-0.034mL.min<-1> and a temperature of 30-35 DEG C, and then introducing deionized water to clean; and chemical silver plating, namely enabling a chemical silver plating solution to flow through the capillary for at least 10min under the conditions of a flowing speed of 0.32-0.34mL.min<-1> and a temperature of 25-30 DEG C, and then introducing deionized water to clean. The obtained plated film is bright and uniform, good in adhesion on the inner wall of the capillary, not liable to fall off, and good in reflectivity for a laser signal. The relative peak height of nitrogen in air, which is determined by the method is not less than 8 times of that under a condition without a capillary.

Description

technical field [0001] The invention belongs to the field of quartz capillary coating, and in particular relates to a method for plating silver on the inner wall of a quartz capillary. Background technique [0002] In the laser Raman gas analyzer, the sampled gas enters the sample chamber after pretreatment, and the Raman effect occurs when the laser is irradiated, and then the signal is collected without attenuation as much as possible to keep the signal undistorted, and then analyzed by the analysis module. So as to obtain accurate measurement results. Since the optical fiber can transmit the emitted laser signal and generate the Raman signal very well, it provides convenience for the detection under many special conditions, so we use the capillary optical fiber as the sample chamber and the signal receiving device, which is in addition to the Raman spectrum analysis module. Another key component. [0003] At present, solid optical fibers loaded with nano-gold or silver ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/38C23C18/42C23C18/18
Inventor 张礼知贾法龙王梦兰熊友辉刘志强
Owner HUAZHONG NORMAL UNIV