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Ultrathin transparent nano/microstructure self-assembled film and its green preparation method

A micro-structure, self-assembly technology, applied in the field of materials science, can solve the problems of unsuitability for large-scale production, high equipment requirements, toxic solvents, etc., and achieve the effect of easy implementation, high transparency and environmental friendliness

Active Publication Date: 2022-04-19
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current methods for preparing nano / micro particles and their modified films usually have defects such as complex preparation methods, high equipment requirements, need to use toxic solvents, and are not suitable for large-scale production.

Method used

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  • Ultrathin transparent nano/microstructure self-assembled film and its green preparation method
  • Ultrathin transparent nano/microstructure self-assembled film and its green preparation method
  • Ultrathin transparent nano/microstructure self-assembled film and its green preparation method

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preparation example Construction

[0044] An aspect of the embodiments of the present invention provides a green method for preparing an ultra-thin transparent nano / micro-structured self-assembled film, which includes:

[0045] (1) Disperse nano / microstructure (should be understood as nanostructure, microstructure or composite structure of the two) and / or nano / microstructure modification in the first liquid phase system to form nano / microstructure dispersion liquid;

[0046] (2) Spray the nano / micro structure dispersion liquid onto the surface of the second liquid phase system by spraying, and remove the second liquid phase system after the first liquid phase system volatilizes to obtain a nano / micro structure film;

[0047] (3) Squeeze the nano / micro-structured film by using liquid surface tension, so that the nano / micro-structured film self-assembles on the gas-liquid interface to form a dense and stable nano / micro-structured film to obtain a uniform structure Controllable nano / micro structured self-assemble...

Embodiment 1

[0107] 1. If figure 1 with figure 2 As shown, take a certain amount of polystyrene microspheres and carry out ultrasonic dispersion with a certain amount of ethanol, the concentration is 2mg / mL;

[0108] 2. Spray the polystyrene microsphere dispersion obtained in step 1 to the interface of the water through a sprayer at a spray speed of 5ml / min. During the spraying process, the size of the sprayed droplets is 5*10 -3 mm, then pump out the solution at a rate of 5ml / min through a peristaltic pump, and self-assemble for 800s at a temperature range of 20-60°C to form a polystyrene microsphere film with a thickness of 5-10μm;

[0109] 3. The uniform and transparent polystyrene microsphere film obtained in step 2 is extruded at a pressure of 7.2mN / m for 60s by means of a peristaltic pump and other objects to absorb the interfacial liquid, and self-assembled at 40°C for 800s to form a uniform and transparent film. Dense polystyrene microsphere film;

[0110] 4. The polystyrene m...

Embodiment 2

[0114] 1. Take a certain amount of nano-gold modified polystyrene microspheres and use a certain amount of ethanol for ultrasonic dispersion, the concentration is 0.05mg / mL;

[0115] 2. Spray the nano-gold modified polystyrene microsphere dispersion obtained in step 1 onto the interface of carbon disulfide at a spray speed of 200ml / min through a sprayer. During the spraying process, the size of the sprayed droplets is 5*10 -1 mm, and then the solution was pumped out by a peristaltic pump at a rate of 20mL / min, thereby forming a nano-gold modified polystyrene microsphere film with a thickness of 5-10 μm;

[0116] 3. The uniform and transparent nano-gold modified polystyrene microsphere film obtained in step 2 is extruded at a pressure of 7.8mN / m for 5s by means of a peristaltic pump and other objects to absorb the interface liquid, and self-assembled at 20°C for 1000s to form Conductive uniform, transparent and dense nano-gold modified polystyrene microsphere film;

[0117] 4....

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Abstract

The invention discloses an ultra-thin transparent nano / micro structure self-assembled film and a green preparation method thereof. The preparation method comprises: dispersing the nano / micro structure and / or its modified product in the first liquid phase system to form a nano / micro structure dispersion; spraying the nano / micro structure dispersion to the second liquid phase system surface, and then remove the second liquid phase system to obtain a nano / micro structure film; the nano / micro structure film is extruded so that the nano / micro structure film is self-assembled on the gas-liquid interface Form a dense and stable self-assembled thin film with nano / micro structure with controllable thickness. The nano / micro particles and their modified films of the present invention have good comprehensive properties and can be widely used on optical and electrical devices and nano coatings; at the same time, the present invention has simple preparation process, convenient operation, low requirements on environmental factors, and does not cause Any impact, to meet the needs of industrial large-scale, mass production.

Description

technical field [0001] The present invention relates to a green preparation method of nano / micro structure self-assembled film, in particular to a self-supporting ultra-thin transparent conductive self-assembled film including multi-scale nano / micro particles or wires and its green preparation method and application , belonging to the field of materials science and technology. Background technique [0002] Self-assembled nanofilms are thermodynamically stable and low-energy ordered films formed by spontaneous adsorption of molecules with certain functional properties on solid-liquid, gas-liquid or gas-solid interfaces through chemical bonds. Spontaneous formation, thermodynamic stability, orderly arrangement of molecules, high-density packing and low defect concentration, the expected physical and chemical properties of the interface can be obtained by artificially designing the molecular structure and surface structure. Self-assembled thin film preparation technologies mai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B81C1/00B81B1/00B82Y10/00B82Y30/00B82Y40/00
CPCB81C1/00214B81B1/00B82Y30/00B82Y40/00B82Y10/00
Inventor 陈涛何江肖鹏谷金翠
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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