Preparation method and application of photo-thermal material Fe3O4/polydopamine/polyisopropyl acrylamide

A technology of propylacrylamide and polydopamine, which is applied in the field of photothermal material preparation, can solve the problems such as the difficulty of remote operation of liquid droplets, and achieve the effects of convenient acquisition of raw materials, wide application prospects, and low cost

Active Publication Date: 2015-06-03
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the technical problem that the remote operation of liquid droplet manipulation on the superphobic surface is not easy to realize, and the free movement of the liquid droplet in all directions is limited, and provides a photothermal material Fe 3 o 4 Preparation method and application of polydopamine / polyisopropylacrylamide

Method used

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  • Preparation method and application of photo-thermal material Fe3O4/polydopamine/polyisopropyl acrylamide

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specific Embodiment approach 1

[0019] Specific implementation mode 1: This implementation mode is a kind of photothermal material Fe 3 o 4 The preparation method of / polydopamine / polyisopropylacrylamide is specifically carried out in the following steps:

[0020] 1. Preparation of Fe 3 o 4 Dispersion solution: Fe 3 o 4 Nanoparticles are ultrasonically 10min~60min in the aqueous solution of trishydroxymethylaminomethane to obtain a dispersed solution; the mass ratio of trishydroxymethylaminomethane in the aqueous solution of tris to deionized water is 1g:( 0.083L~4.13L); said Fe 3 o 4 The volume ratio of the mass of nanoparticles to tris aqueous solution is 1g:(2L~100L);

[0021] 2. Preparation of Fe 3 o 4 / Polydopamine nanoparticles: Add dopamine to the dispersion solution obtained in step 1, and stir for 10h to 36h at a stirring speed of 100r / min to 900r / min to obtain Fe 3 o 4 / Polydopamine nanoparticle dispersion, the Fe 3 o 4 / Polydopamine nanoparticles were sucked out and Fe was washed with ...

specific Embodiment approach 2

[0027] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the frequency of the ultrasound described in Step 1 is 50 Hz-600 Hz. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0028] Specific embodiment three: this embodiment is different from one of specific embodiments one to two: the Fe described in step one 3 o 4 The particle size of the nanoparticles is 50nm-1000nm. Others are the same as one of the specific embodiments 1 to 2.

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Abstract

The invention discloses a preparation method and application of a photo-thermal material Fe3O4 / polydopamine / polyisopropyl acrylamide, relates to a preparation method and application of a photo-thermal material, and aims to solve the technical problems that the remote operation for controlling liquid droplets on an extremely hydrophobic surface is not easy to achieve and free movement of the liquid droplets is limited in different directions. The preparation method comprises the following steps: I, preparing an Fe3O4 dispersion solution; II, preparing Fe3O4 / polydopamine / polyisopropyl acrylamide granules; III, preparing Fe3O4 / polydopamine-bromine; IV, preparing Fe3O4 / polydopamine / polyisopropyl acrylamide. The preparation method has the advantages that due to adoption of the photo-thermal material, operation in water, of organic liquid droplets is simple and feasible, the equipment is simple, the raw materials are convenient to obtain, the cost is low, the operation on the organic liquid droplets is achieved through remote laser control, and the Fe3O4 / polydopamine / polyisopropyl acrylamide material is in an extremely hydrophobic state under water, is free of pollution to the organic liquid droplets, and has wide application prospect.

Description

technical field [0001] The invention relates to a preparation method and application of a photothermal material. Background technique [0002] In recent years, more and more attention has been paid to the controllable operation of micro-droplets. It has important application value in microreactor, biological analysis, chemical detection, lossless droplet transport and so on. At present, the existing methods of micro-droplet manipulation mainly include microfluidic devices, oil-water emulsion systems, and droplet manipulation on superphobic surfaces. Among them, in the microfluidic equipment, the manipulation based on the microchannel is the main technology for the manipulation of the droplet, but there are many inherent problems, such as the design of the equipment is very complicated, the production is difficult, and the contamination of the droplet in the microchannel is relatively serious, etc. Both hinder the development of microfluidic devices. The oil-water emulsion...

Claims

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Application Information

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IPC IPC(8): C08F283/00C08F220/56C08F2/44C08K3/22
Inventor 潘钦敏楚盈刘发堂秦利明
Owner HARBIN INST OF TECH
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