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Preparation method of composite particle with hairy structure on surface

A technology of composite particles and nanoparticles, which is applied in the field of preparation of composite particles, can solve the problems of inappropriate preparation of hairy structures, cumbersome preparation process of template method, and inability to prepare large-scale preparations.

Inactive Publication Date: 2020-10-30
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation process of the template method is cumbersome and cannot be prepared on a large scale, and it is not suitable for preparing hairy structures on curved surfaces.

Method used

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  • Preparation method of composite particle with hairy structure on surface
  • Preparation method of composite particle with hairy structure on surface
  • Preparation method of composite particle with hairy structure on surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1, in-situ growth of PDVB nanofibers on the surface of silica microspheres

[0050] Add 200mg of silica microspheres to 50ml of n-heptane solution dissolved with 100mg of Span-80 (Span-80, the volume concentration in n-heptane is 2‰), ultrasonic 15min to make the silica uniform in the solution dispersion.

[0051]Then add 100 μL of boron trifluoride etherate complex (BFEE, the volume concentration in the system is 2‰), and add 1ml of divinylbenzene monomer (DVB, the volume concentration in the system is 2%) after 30 seconds, After reacting at room temperature for 10 minutes, excess ethanol was added to quench the reaction (the quenching of cationic polymerization can be judged by the appearance color, when adding ethanol, the color of the system will change from orange red to white, accompanied by the release of HF gas). The entire reaction process was carried out under ultrasonic conditions.

[0052] After the reaction, the product was centrifuged and wash...

Embodiment 2

[0054] Embodiment 2, in-situ growth of PDVB nanofibers on the surface of silica microspheres

[0055] Add 200 mg of silicon dioxide microspheres into 50 ml of n-heptane solution dissolved with 100 mg of Span-80 (Span-80), and ultrasonically disperse the silicon dioxide in the solution for 15 minutes.

[0056] Then add 100μL boron trifluoride ether complex (BFEE), add 1ml divinylbenzene monomer (DVB) after reacting for 30s, add excess ethanol to quench the reaction after reacting at room temperature for 3min (the quenching of cationic polymerization can be judged by the appearance Judging by the color, when the addition of ethanol is terminated, the color of the system will change from orange red to white, accompanied by the release of HF gas). The entire reaction process was carried out under ultrasonic conditions.

[0057] Electron micrographs show that SiO 2 Nanofibers have not been formed on the surface of the particles, only a rough polymer shell (forming a transition st...

Embodiment 3

[0058] Embodiment 3, grow PDVB-PVBC nanofiber in situ on the surface of silica microspheres

[0059] Add 200mg of silica microspheres into 50ml of n-heptane solution dissolved with 100mg of Span-80, and ultrasonically disperse the silica for 15min.

[0060] Add 100 μL boron trifluoride diethyl ether (volume concentration in the system is 2‰), react for 30 seconds, add 1ml DVB, and react at room temperature for 10 minutes.

[0061] 200 μL of benzylchlorostyrene (VBC, volume concentration in the system: 0.4%) was added to the system once, and after 5 minutes of reaction, excess ethanol was added to terminate the reaction. The product PDVB-VBC@SiO was obtained after centrifugation and washing with ethanol for 3 times 2 .

[0062] The fiber is divided into two segments, one of which is close to the SiO 2 A section of the composition is PDVB nanofibers, the one facing the outside Duan Cheng Divided into PVBC nanofibers, the length of PVBC segment is about 250nm.

[0063] Th...

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Abstract

The invention discloses a preparation method of a composite particle with a hairy structure on the surface. The preparation method comprises the following steps: 1) dispersing inorganic nanoparticlesin an organic solvent; and 2) adding an initiator and a monomer into the system in the step 1), and carrying out cationic polymerization on the monomer to generate polymer nanofibers on the surfaces of the inorganic nanoparticles, thereby obtaining the composite particles. According to the preparation method of the composite particle with the hairy structure on the surface, polymer nanofibers growon the surface of the particle in situ through a cation precipitation polymerization method by utilizing the quenching effect of functional groups on the surface of inorganic nanoparticles on cations. According to the method, the application range of the inorganic nanoparticles is wide, and the composition and the morphology of the polymer fibers can be controlled through reaction conditions.

Description

technical field [0001] The invention relates to a method for preparing composite particles with a hairy structure on the surface, and belongs to the technical field of polymer nanomaterials. Background technique [0002] Hairy structures are very common in nature, which can endow organisms with special properties, such as sensing (J.CellSci., 2010, 123, 499-503), antifouling (J.Mater.Chem.B 2013, 1, 3599-3606 ), superhydrophobicity (Nature 2004, 432, 36), adhesion (Nature, 2000, 405, 681-685), etc. For example, there are a large number of elongated microsetae with a multi-scale structure distributed on the legs of water striders, which can prevent the infiltration of water droplets. Macroscopically, they are super-hydrophobic, allowing water striders to walk or run quickly on the water surface. The strong adhesion of gecko comes from a large number of micron-sized bristles on the soles of the feet, and the ends of the bristles are branched to form hundreds of finer shovel-l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/36C08F212/14C08F112/36C08F2/44C08K3/36C08K3/22B01J13/02B01D17/022
CPCB01D17/02B01J13/02C08F2/44C08F112/36C08F212/36C08K3/22C08K3/36C08K2003/2275C08K2201/01C08K2201/011C08F212/14
Inventor 杨振忠万基平梁福鑫
Owner INST OF CHEM CHINESE ACAD OF SCI
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