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Stress-driven flexible terahertz dynamic control material and its preparation method

A terahertz, dynamic technology, applied in the field of dynamic regulation of terahertz waves, to achieve the effect of efficient transmission characteristics and regulation of transmission characteristics

Active Publication Date: 2021-03-19
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This limits the application of THz waves in the field of flexible optoelectronic devices

Method used

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  • Stress-driven flexible terahertz dynamic control material and its preparation method
  • Stress-driven flexible terahertz dynamic control material and its preparation method
  • Stress-driven flexible terahertz dynamic control material and its preparation method

Examples

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preparation example Construction

[0025] In an exemplary embodiment of the present invention, the preparation method of a stress-driven flexible terahertz dynamic control material may include the following steps:

[0026] (1) Drying treatment of polymer elastomer base material and conductive particles

[0027] Dry the polymer elastomer base material and conductive particles to remove the moisture in the polymer elastomer base material and conductive particles, so as to avoid partial agglomeration of the base material during the subsequent melt blending of the polymer elastomer base material and conductive particles, resulting in incomplete mixing. uniform. Here, the temperature of the drying treatment may be 60-90° C., and the drying treatment time may be 12-24 hours. For example, the polymer elastomer base material can be one or more of silicone thermoplastic vulcanizate, polyurethane, silicone rubber, styrene block copolymer, ethylene-octene copolymer, and olefin block copolymer. For example, the conductiv...

example 1

[0045] The thermoplastic polyurethane and metal nickel particles were dried at 60°C for 24h to remove the moisture in the thermoplastic polyurethane and metal nickel particles. Wherein, the particle diameter of the metallic nickel particles is 50 nm.

[0046] The dried thermoplastic polyurethane and the metal nickel particles are mixed according to the filling ratio of the metal nickel particles at 30 vol% to obtain a mixed powder, and the mixed powder is heated to obtain a melt-blended flexible terahertz dynamic control intermediate. Wherein, the temperature of melt blending is 160° C., and the time of melt blending is 30 min.

[0047] The melt-blended terahertz intermediate is compression-molded to obtain flexible films of flexible terahertz dynamic control materials with different thicknesses. Among them, the temperature of the compression molding process is 150°C, the pressure of the compression molding is 5.5Mpa, and the thickness of the flexible film of the flexible ter...

example 2

[0049] Dry the thermoplastic olefin block copolymer and the metal aluminum particles at 85° C. for 20 h to remove the moisture in the thermoplastic olefin block copolymer and the metal aluminum particles. Wherein, the size of the metal aluminum particles is 5 μm.

[0050]The dried thermoplastic olefin block copolymer and the metal aluminum particles are mixed according to the filling ratio of the metal aluminum particles to 40 vol% to obtain a mixed powder, and the mixed powder is heated to obtain a melt-blended flexible terahertz dynamic control intermediate. Wherein, the temperature of melt blending is 180° C., and the time of melt blending is 20 min.

[0051] The melt-blended terahertz intermediate is compression-molded to obtain flexible films of flexible terahertz dynamic control materials with different thicknesses. Among them, the temperature of the compression molding process is 150° C., the pressure of the compression molding is 10 MPa, and the thickness of the flexi...

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Abstract

The invention provides a flexible terahertz dynamic regulation and control material based on stress driving and a preparation method thereof. The method comprises the following steps: mixing a polymerelastomer base material with conductive particles in a preset proportion to obtain mixed powder; heating the mixed powder, carrying out melting and blending to obtain an intermediate of the flexibleterahertz dynamic regulation and control material; and carrying out compression molding on the intermediate in a melted and blended state to obtain a flexible film of the terahertz dynamic regulationand control material; wherein the preset proportion is greater than a critical filling proportion, and the critical filling proportion is the lowest conductive particle filling proportion that the conductive particles just form a communicated network structure after the mixed powder is subjected to melting and blending. The flexible terahertz dynamic regulation and control material can dynamicallyand efficiently regulate and control terahertz wave transmission characteristics under the action of stress and strain, and has wide potential application in the fields of terahertz switching, modulation, sensing, imaging and the like.

Description

technical field [0001] The invention belongs to the technical field of terahertz wave dynamic control, and specifically relates to a stress-driven flexible terahertz dynamic control material and a preparation method thereof. Background technique [0002] Terahertz (THz) waves cover a broadband range from infrared to microwave frequency bands, and have broad application prospects in imaging, high-speed broadband communications, radar, and sensing. The development of dynamic functional devices such as THz switching and modulation is the basis for its further application. [0003] The core of THz dynamic control devices is functional materials with dynamically adjustable photoelectric parameters, such as doped semiconductors, phase change materials, liquid crystals, superconducting materials, and two-dimensional materials represented by graphene. It is mainly to excite the material through conditions such as external electric field, laser or variable temperature, resulting in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08L75/04C08L23/08C08L53/00C08K3/08C08J5/18
CPCC08J5/18C08J2323/08C08J2353/00C08J2375/04C08J2383/04C08K2003/0806C08K2003/0812C08K2003/085C08K2003/0856C08K2003/0862C08K2201/001C08K2201/011
Inventor 施奇武邓华朱洪富田可朱礼国黄婉霞傅强
Owner SICHUAN UNIV
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