Porous PDMS film with two-dimensional inverse opal structure and preparation method thereof

An inverse opal structure, PDMS technology, applied in the field of PDMS film and its preparation, can solve the problem of destroying the ordered structure, and achieve the effect of simple method

Active Publication Date: 2022-07-12
SOUTHWEST UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this process, pollutants and impurities are easily introduced, destroying the ordered structure

Method used

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  • Porous PDMS film with two-dimensional inverse opal structure and preparation method thereof
  • Porous PDMS film with two-dimensional inverse opal structure and preparation method thereof
  • Porous PDMS film with two-dimensional inverse opal structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The temperature of the heating plate was set to 50 °C, the substrate was placed on the heating plate, and 1 mL of 10 mg / mL dispersion of monodisperse polystyrene microspheres with a particle size of 500 nm was carefully dropped onto the substrate. After the solvent evaporates, the deposition of polystyrene microspheres is completed. The 500 nm polystyrene microsphere self-assembled membrane was immersed in ethanol for 1 h, then removed and carefully dried on the backside of the substrate using a gentle nitrogen stream. Finally, the substrates were annealed on a hot plate at 90 °C for 10 min to remove any residual solvent and ensure good contact between the polystyrene microspheres and between the polystyrene microspheres and the substrate.

[0026] The polystyrene microsphere self-assembled membrane was infiltrated with a mixture of silicone oil and PDMS prepolymer (the weight ratio of PDMS binder to curing agent was 10:1) (the mass ratio of silicone oil to PDMS prepoly...

Embodiment 2

[0029] The heating plate temperature was set to 50 °C, the substrate was placed on the heating plate, and 1 mL of 10 mg / mL monodisperse polystyrene microspheres with a particle size of 2 μm dispersed droplets were carefully applied on the substrate. After the solvent evaporates, the deposition of polystyrene microspheres is completed. The 2 μm polystyrene microsphere self-assembled membrane was immersed in ethanol for 1 h, then removed and carefully dried on the backside of the substrate using a gentle nitrogen stream. Finally, the substrates were annealed on a hot plate at 90 °C for 10 min to remove any residual solvent and ensure good contact between the polystyrene microspheres and between the polystyrene microspheres and the substrate.

[0030] The polystyrene microsphere self-assembled membrane was infiltrated with a mixture of silicone oil and PDMS prepolymer (the weight ratio of PDMS binder to curing agent was 10:1) (the mass ratio of silicone oil to PDMS prepolymer was...

Embodiment 3

[0033] The temperature of the heating plate was set to 50 °C, the substrate was placed on the heating plate, and 1 mL of 10 mg / mL monodisperse polystyrene microspheres with a particle size of 1 μm dispersed droplets were carefully applied on the substrate. After the solvent evaporates, the deposition of polystyrene microspheres is completed. The 1 μm polystyrene microsphere self-assembled membrane was immersed in ethanol for 1 h, then removed and carefully dried on the backside of the substrate using a gentle stream of nitrogen gas. Finally, the substrates were annealed on a hot plate at 90 °C for 10 min to remove any residual solvent and ensure good contact between the polystyrene microspheres and between the polystyrene microspheres and the substrate.

[0034] The polystyrene microsphere self-assembled membrane was infiltrated with a mixture of silicone oil and PDMS prepolymer (the weight ratio of PDMS binder to curing agent was 10:1) (the mass ratio of silicone oil to PDMS pr...

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Abstract

The invention relates to a porous PDMS (Polydimethylsiloxane) film with a two-dimensional inverse opal structure and a preparation method thereof, and the preparation method comprises the following steps: forming an ordered three-dimensional periodic structure, namely a colloidal crystal film, from monodispersed PS (polystyrene) microspheres by a self-assembly arrangement method, immersing the prepared film in ethanol, taking out, drying and annealing to obtain the porous PDMS film with the two-dimensional inverse opal structure. The preparation method comprises the following steps: coating the surface of a PS self-assembled film with a mixture of silicone oil and a PDMS prepolymer, spin-coating the film with the PDMS prepolymer, curing, and removing polystyrene PS microspheres, thereby obtaining the porous PDMS film with a two-dimensional inverse opal structure. The invention provides a method for preparing a two-dimensional inverse opal structure film by taking a plurality of layers of polystyrene colloidal particle crystals on a solid substrate as a template, so that the film forming quality of the two-dimensional inverse opal structure film is improved. The preparation method is simple in process and low in cost, the process of transferring single-layer polystyrene colloidal particle crystals is omitted, and the problems that in the prior art, defects are generated and impurities are introduced due to transferring of single-layer polystyrene microspheres are solved. The obtained porous PDMS film with the two-dimensional inverse opal structure has a unique optical effect and can be applied to the fields of intelligent display, traffic safety reflective facilities, anti-counterfeit labels, structural color coatings, decoration and the like.

Description

technical field [0001] The invention relates to a PDMS film and a preparation method and application thereof, in particular to a porous PDMS film with a two-dimensional inverse opal structure and a preparation method thereof, which are used in intelligent displays, traffic safety reflective facilities, anti-counterfeiting labels, structural color coatings and Application in the field of decoration. Background technique [0002] Pigment colors face the problem of discoloration, fading and other color changes during use, because the pigments undergo physical or chemical changes under the action of environmental factors. As for structural color, as long as the microstructure remains intact, it can achieve the effect of never fading, which has attracted more and more attention from researchers. Generally speaking, structural colors are various colors produced by the special propagation mode (interference, diffraction and scattering, etc.) of light incident on a special micro-na...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08J9/26C08J5/18
CPCC08J9/26C08J5/18C08J9/0061C08J2201/0462C08J2383/04C08J2483/04C08J2425/06
Inventor 李姝靓麦贤敏
Owner SOUTHWEST UNIVERSITY FOR NATIONALITIES
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