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Preparation method and application of adjustable amphiphobic fluorescent polystyrene microsphere filler

A technology of polystyrene microspheres and polystyrene, which is applied in the field of hydrophobicity and oleophobicity, can solve the problems of difficulty in further improving hydrophobicity and thermal stability, and achieve the effect of improving thermal stability and changing amphiphobic properties

Active Publication Date: 2022-07-01
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to the contact angle data of the finally constructed powder, the maximum of rod-shaped silica is 147°. In the Tg test of thermal stability performance, the final residual rate of rod-shaped silica is only about 45%, and the hydrophobicity and thermal stability are average. difficult to improve

Method used

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  • Preparation method and application of adjustable amphiphobic fluorescent polystyrene microsphere filler
  • Preparation method and application of adjustable amphiphobic fluorescent polystyrene microsphere filler
  • Preparation method and application of adjustable amphiphobic fluorescent polystyrene microsphere filler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of carbon quantum dots

[0035] Weigh 3g of calcium citrate and 3g of urea, dissolve both in 10mL of deionized water, stir and ultrasonically dissolve fully, microwave for 5min at 700W power, add 50ml of deionized water after cooling to room temperature, and ultrasonically stir for 20min , centrifugal filtration to remove insoluble impurities. Dialysis was performed using a dialysis membrane with a molecular weight cut-off of 1000 D for 48 h. The solution was then concentrated to 20ml by a rotary evaporator, 50ml of anhydrous methanol and 20g of anhydrous magnesium sulfate were added, and after standing for 24h, the solution was centrifuged at a high speed of 10000r / min, and the upper liquid was filtered using an ultrafiltration membrane with a pore size of 0.22 μm. , to obtain carbon quantum dot methanol solution;

[0036] Infrared test is carried out to the carbon quantum dots obtained in step (1), and the test results are as follows figure 1 As can...

Embodiment 2

[0049] (1) Preparation of carbon quantum dots

[0050] Weigh 1.5 g of calcium citrate and 3 g of urea, dissolve them in 10 mL of deionized water, stir and ultrasonicate until they are fully dissolved, and microwave them for 5 min. After cooling down to room temperature, 50 ml of deionized water was added and ultrasonically stirred for 20 min, and the insoluble impurities were removed by centrifugal filtration. A dialysis membrane with a molecular weight cut-off of 1000 D was selected for dialysis for 48 h. The solution was selected and concentrated to 20ml by a rotary evaporator, 50ml of anhydrous methanol and 20g of anhydrous magnesium sulfate were added, and after standing for 24h, the solution was centrifuged at a high speed of 10000r / min and filtered with an ultrafiltration membrane with a pore size of 0.22 μm to obtain carbon quantum dots. methanol solution;

[0051] (2) the preparation method of polystyrene microspheres is the same as in Example 1;

[0052] (3) The pr...

Embodiment 3

[0055] (1) Preparation of carbon quantum dots

[0056] Weigh 6 g of calcium citrate and 3 g of urea, dissolve them in 10 mL of deionized water, stir and ultrasonicate until they are fully dissolved, and microwave them for 5 min. After cooling down to room temperature, 50 ml of deionized water was added and ultrasonically stirred for 20 min, and the insoluble impurities were removed by centrifugal filtration. A dialysis membrane with a molecular weight cut-off of 1000 D was selected for dialysis for 48 h. Then, the solution was concentrated to 20ml by a rotary evaporator, 50ml of anhydrous methanol and 20g of anhydrous magnesium sulfate were added, and after standing for 24h, high-speed centrifugation at 10000r / min and filtration with an ultrafiltration membrane with a pore size of 0.22 μm were used to obtain carbon quantum dots. methanol solution;

[0057] (2) the preparation method of polystyrene microspheres is the same as in Example 1;

[0058] (3) The preparation method...

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Abstract

The invention belongs to the field of hydrophobic and oleophobic materials, and particularly relates to a preparation method of an adjustable amphiphobic fluorescent polystyrene microsphere filler, which comprises the following steps: firstly, preparing N-doped carbon quantum dots (N-CQDs) by using citric acid or calcium citrate as a carbon source and adding urea as a passivator through a microwave method; preparing polystyrene microspheres by taking styrene as a raw material; then vinyl trimethoxy siloxane and carbon quantum dots are added, so that a layer of structure with a certain morphology is compounded on the surface of the polystyrene microsphere, and finally the raspberry-shaped composite microsphere is formed. The method has the advantages of being simple in preparation process and controllable in amphiphobic property.

Description

technical field [0001] The invention belongs to the field of hydrophobicity and oleophobicity, in particular to a preparation method of an adjustable amphiphobic fluorescent polystyrene microsphere filler. Background technique [0002] Carbon quantum dots (CQDs) are a new type of carbon material discovered in recent years, usually a zero-dimensional carbon-based nanomaterial with a size below 10 nm. Carbon quantum dots and composite materials based on carbon quantum dots are new functional materials. On the one hand, they can inherit carbon quantum dots with low toxicity, good biocompatibility, adjustable luminescence range, good photostability, easy functionalization, environmental friendliness, and cost. Compared with traditional rare earth fluorescent materials, carbon quantum dots have lower toxicity; Carbon quantum dots have higher stability. Therefore, carbon quantum dots and composite materials based on carbon quantum dots have shown good application prospects in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08L83/07C08K3/04C08J5/18
CPCC08L25/06C08J5/18C08J2383/07C08J2483/07C08J2425/06C08L83/04C08K3/04
Inventor 姜彦王勃东刘一凡张洪文
Owner CHANGZHOU UNIV