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Intelligent aerogel in-situ composite system with shape memory performance and preparation method thereof

An aerogel original and aerogel technology, which is applied in the field of intelligent aerogel in-situ composite system and its controllable preparation, can solve the problem that fillers such as nanomaterials are difficult to disperse uniformly, nanoparticle dispersion is uneven, and performance controllability is poor. and other problems, to achieve good industrial application potential, strong designability, and easy implementation.

Inactive Publication Date: 2021-05-28
HAINAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] From the above background analysis, it can be seen that porous smart materials have good development potential and application prospects, but they still face problems such as difficulty in uniform dispersion of fillers such as nanomaterials, limited addition, poor controllability, complex process, and high cost.
The invention provides an in-situ composite control technology for porous intelligent materials. The prepared composite material system has good dispersion uniformity of nanoparticles, strong controllability of microstructure and performance, and solves the problem of uneven dispersion of nanoparticles in the porous intelligent composite material system. The technical problems of uniformity and poor performance controllability provide a feasible method for exploring porous smart material composite systems

Method used

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  • Intelligent aerogel in-situ composite system with shape memory performance and preparation method thereof
  • Intelligent aerogel in-situ composite system with shape memory performance and preparation method thereof
  • Intelligent aerogel in-situ composite system with shape memory performance and preparation method thereof

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preparation example Construction

[0025] The method for preparing the intelligent airgel in-situ composite system provided by the present invention can design and prepare the microstructure and properties at the nanometer scale according to application requirements.

[0026] The intelligent airgel in-situ composite system can be used in the following fields.

[0027] (1) By rationally designing the nanoparticle morphology, porosity, pore structure, and surface functional group types and quantities in the smart airgel in-situ composite system, it can be used for environmental energy catalysis, energy storage, marine resource development and utilization, medicine, Artificial enzymes, porous electrodes, intelligent adsorption and detection, etc.

[0028] (2) Utilize vacuum freeze-drying-controlled carbonization method to regulate the micro- and macro-structure of the smart airgel in-situ composite system, which can be used as a lightweight smart structural material for construction, machinery, smart protection, f...

Embodiment 1

[0032] At room temperature, add 6.0 g polyvinyl alcohol into 100.0 ml deionized water and stir for 2.0 h. After fully swelling, slowly heat the solution to 100.0 ml while stirring. o C was stirred at constant temperature for 3.0 h to fully dissolve until the whole solution was free of particles, clear and uniform, and then cooled to room temperature to obtain a polyvinyl alcohol solution. The pH value of the polyvinyl alcohol solution was adjusted to 3.5 with hydrochloric acid, and after stirring for 1.0 h, 5.0 ml of glutaraldehyde was added while stirring, and the stirring was continued for 2.0 h to obtain a prepolymer solution. After pouring the pre-polymerization solution into the mold, carry out vacuum static degassing treatment for 3.0 h, at -25.0 o Under the condition of C, pre-freeze for 1.0 h, then at -60.0 o Under the condition of C, it was pre-frozen for 2.0 h, vacuum freeze-dried, and then released from the mold to obtain the aerogel. Put the airgel at 90.0 o Und...

Embodiment 2

[0034] At room temperature, add 6.0 g polyvinyl alcohol into 100.0 ml deionized water and stir for 2.0 h. After fully swelling, slowly heat the solution to 100.0 ml while stirring. o C was stirred at constant temperature for 3.0 h to fully dissolve until the solution was free of particles, clear and uniform, and then cooled to room temperature to obtain a polyvinyl alcohol solution. The pH value of the polyvinyl alcohol solution was adjusted to 3.5 with hydrochloric acid, and after stirring for 1.0 h, 5.0 ml of glutaraldehyde was added while stirring, and the stirring was continued for 2.0 h to obtain a prepolymer solution. After pouring the pre-polymerization solution into the mold, carry out vacuum static degassing treatment for 3.0 h, at -25.0 o Under the condition of C, pre-freeze for 1.0 h, then at -60.0 o Under the condition of C, it was pre-frozen for 2.0 h, vacuum freeze-dried, and then released from the mold to obtain the aerogel. Put the airgel at 90.0 oUnder the ...

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Abstract

The invention belongs to the field of preparation of porous intelligent materials, and particularly relates to preparation of an intelligent aerogel in-situ composite system with shape memory performance. In-situ composite regulation and control on the nanoparticles is achieved. The microstructure and the performance of the porous intelligent aerogel are regulated and controlled. The shape memory aerogel in-situ composite material is prepared by using a vacuum freeze-drying-controllable carbonization method, and the technical problems of non-uniform dispersion and poor performance controllability when a nano material is adopted for modifying the surface of a porous intelligent material are solved. The preparation process is good in controllability, in-situ composite modification of the nano material and the porous intelligent material is easy to realize, and the universality is high. The intelligent aerogel in-situ composite system is high in structural designability, good in mechanical property, good in shape memory controllability, low in density and good in hydrophilicity, and has excellent application potential in the fields of intelligent adsorption and detection, environmental energy catalysis, marine resource development and utilization, intelligent gas-sensitive materials, artificial enzymes and the like; and an effective way is provided for developing a porous intelligent composite material.

Description

technical field [0001] The invention relates to the field of preparation of porous intelligent materials, in particular to an intelligent airgel in-situ composite system with shape memory performance and a controllable preparation method thereof. Background technique [0002] The research on smart materials involves many cutting-edge sciences and advanced technologies, and relevant research breakthroughs will bring about theoretical innovations and technological changes in many disciplines. Shape memory composite material is a new kind of intelligent material, and it is a new hotspot in the research, development and application of intelligent materials. Shape memory composites are materials that can not only fix and maintain a temporary shape or state under certain conditions, but also return to their original shape or state under controllable external stimuli such as heat, light, water, electricity, magnetism, and chemical induction. State of a class of materials. At pres...

Claims

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Application Information

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IPC IPC(8): B01J13/00C01B32/05
CPCB01J13/0091C01B32/05
Inventor 王文欣杨静杜立文
Owner HAINAN UNIVERSITY
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