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Bonding method of diatom shell or kieselguhr and glass

A diatom shell and bonding technology, used in material inspection products, biological testing, etc., can solve problems such as difficult control of conditions, material damage, and inability to meet the bonding requirements of diatom shells, to ensure integrity, high Reliability and the effect of improving detection efficiency

Inactive Publication Date: 2012-07-25
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Anodic bonding and direct bonding require that the two bonding planes must be closely bonded, so the two planes participating in the bonding are usually large-area glass sheets with high flatness; after high temperature bonding, material will appear at the bonding interface. a large amount of damage, and the conditions are more difficult to control
None of the above bonding methods can meet the bonding requirements of diatom shells or diatomite and glass

Method used

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  • Bonding method of diatom shell or kieselguhr and glass
  • Bonding method of diatom shell or kieselguhr and glass
  • Bonding method of diatom shell or kieselguhr and glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] Example 1 : Bonding method of curved algae shell and glass sheet

[0111] Step 1: Preparation of siliceous shells from Curvularia basalis

[0112] (A) Putting Bentia desmoides into sulfuric acid with a mass percent concentration of 70% and mixing to obtain a diatom suspension;

[0113] Dosage: Add 60ml of sulfuric acid to 1g of Algae desmoides;

[0114] (B) Take out the diatom suspension and put it into a centrifuge after incubating at 90° C. for 10 minutes; centrifuge it at a speed of 7000 r / min for 20 minutes, take it out, remove the supernatant, and obtain the first mixture;

[0115] (C) Add deionized water to the first mixture, take it out by centrifuging at a speed of 7000r / min for 8min, remove the supernatant, and obtain the second mixture;

[0116] Dosage: Add 60ml of deionized water to 10ml of the first mixture;

[0117] (C-1) Add deionized water to the second mixture, take it out by centrifuging at a speed of 7000r / min for 8min, and remove the supernatant ...

Embodiment 2

[0145] Example 2 : Bonding method of Cyclotella shell and glass sheet

[0146] Step 1: Preparation of siliceous shells from Cyclotella

[0147] (A) putting Cyclotella into sulfuric acid with a mass percent concentration of 50% for mixing to obtain a diatom suspension;

[0148] Dosage: Add 40ml of sulfuric acid to 1g of algae;

[0149] (B) taking out the diatom suspension and putting it into a centrifuge after incubating it at 100° C. for 30 minutes; centrifuging it at a speed of 3000 r / min for 30 minutes, taking it out, removing the supernatant, and obtaining the first mixture;

[0150] (C) Add deionized water to the first mixture, take it out by centrifuging at a speed of 3000r / min for 20min, remove the supernatant, and obtain the second mixture;

[0151] Dosage: Add 40ml of deionized water to 10ml of the first mixture;

[0152] (C-1) Add deionized water to the second mixture, take it out by centrifuging at a speed of 3000r / min for 20min, and remove the supernatant to ob...

Embodiment 3

[0184] Example 3 : Bonding experiment of the shell of the circular sieve alga diatomite and the glass plate

[0185] Step 1: The steps for preparing siliceous shells from the circular sieve algae diatomaceous earth include:

[0186] (D) Put the circular sieve algae diatomaceous earth into a glass container, add deionized water, and ultrasonically clean it for 30 minutes under the conditions of power 1000W and working frequency 40KHz, then use a filter cloth with a pore size of 20μm to separate, and filter to obtain the filter cloth. cloth top (first top);

[0187] Dosage: Add 100ml of deionized water to 10ml of the second mixture;

[0188] (E) Put the first supernatant into a glass container, add absolute ethanol with a concentration of 95% by mass, ultrasonically clean it for 10 minutes under the conditions of power 1000W and working frequency 40KHz, and then use a filter cloth with a pore size of 20 μm to separate , filter to obtain the filter cloth supernatant (the seco...

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Abstract

The invention discloses a bonding method of diatom shell or kieselguhr and glass, which bonds diatom shell or kieselguhr on the surface of glass by hydrofluoric acid on the premise of ensuring that the diatom shell or the kieselguhr is intact. In the bonding process, no additive is added, and the original abundant appearance and the special nanoscale porous microstructure of the diatom shell or the kieselguhr are kept in the prepared microfluid substrate, so that the microfluid substrate can perform the functions of automatically loading detecting probes and adsorbing target molecules in the field of biochip. At the temperature of 25 DEG C, the bond strength of the diatom shell or the kieselguhr and the glass is 5-11 MPa.

Description

technical field [0001] The invention relates to a bonding method of hydrofluoric acid, more particularly, refers to a method for bonding and fixing diatom shells or diatomite diatom shells or diatom earth to glass. The products obtained by bonding can be used as microfluidic substrates such as biochips. Background technique [0002] Diatoms are microorganisms that widely exist in nature. Compared with other microorganisms, it has a relatively special material and structure (such as spherical, sheet-shaped, ring-shaped, disc-shaped, cylindrical, rod-shaped, boat-shaped, etc.). First of all, most of the diatom shell material is composed of silica; secondly, a single diatom has a volume of a few microns to tens of microns, has a cavity structure inside, and has a nanometer surface that is difficult to process by mechanical means. grade micropores. Therefore, the nanoscale pores on the surface of diatoms not only have the function of adsorbing tiny particles, but also have th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/22G01N33/48
Inventor 张德远蔡军潘骏峰王瑜李文
Owner BEIHANG UNIV