Check patentability & draft patents in minutes with Patsnap Eureka AI!

Method for preparing flexible trans-polymer dispersed liquid crystal film by using photoetching technology

A photolithography technology and liquid crystal dispersion technology, which is applied in the field of preparing trans-polymer dispersed liquid crystal films, can solve the problems of poor optical contrast of flexible R-PDLC films, etc.

Active Publication Date: 2020-04-10
HARBIN INST OF TECH
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problem of poor optical contrast of existing flexible R-PDLC films, and provides a method for preparing flexible trans-polymer dispersed liquid crystal films using photolithography technology

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing flexible trans-polymer dispersed liquid crystal film by using photoetching technology
  • Method for preparing flexible trans-polymer dispersed liquid crystal film by using photoetching technology
  • Method for preparing flexible trans-polymer dispersed liquid crystal film by using photoetching technology

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0024] Specific Embodiment 1: This embodiment is a method for preparing a flexible trans-polymer dispersed liquid crystal film using photolithography technology, specifically according to the following steps:

[0025] 1. Coating photoresist on the ITO-PET film: Coat the negative photoresist on the ITO of the ITO-PET film. 15min, then placed on a hot table for thermal curing, the curing temperature is 90°C to 120°C, and the curing time is 90s to 200s;

[0026] 2. Photolithographic grooves, development: put the ITO-PET film coated with photoresist into the photolithography machine to fix, photolithographic parallel grooves, the width of each groove is equal and the width of the groove is 1 μm to 10 μm , exposure 120mJ / cm 2 ~170mJ / cm 2 , the distance between the central axes of two adjacent grooves is twice the width of the groove; after photolithography, take out the sheet, soak it in the developing solution for development, the soaking time is 40s~60s, rinse the excess develo...

specific Embodiment approach 2

[0033] Embodiment 2: This embodiment differs from Embodiment 1 in that: the thickness of the ITO-PET film described in Step 1 is 150 μm-200 μm. Others are the same as the first embodiment.

specific Embodiment approach 3

[0034] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the negative photoresist described in step 1 is SU-8 negative photoresist. Others are the same as those in Embodiment 1 or 2.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
heightaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a flexible trans-polymer dispersed liquid crystal film by using a photoetching technology, and relates to a method for preparing a trans-polymer dispersed liquid crystal film. The technical problem that an existing flexible R-PDLC film is poor in optical contrast is solved. According to the invention, by changing the width of an orientation groove, the structure and proportion of a liquid crystal ultraviolet polymerizable monomer, the pre-orientation degree of liquid crystal molecules, the polymer network, the molecular weight, the branching degree and the like are changed, a R-PDLC film with flexibility is formed, the strong light protection performance of high light transmittance in a non-electrified state and low light transmittance in an electrified state is achieved, the maximum value and the minimum value of the transmittance are 81.2% and 3.9% respectively, the optical contrast is high, and the photoelectric properties are stable.

Description

technical field [0001] The invention relates to a method for preparing a trans polymer dispersed liquid crystal film. Background technique [0002] The problem of light pollution continues to heat up, and more and more designs of buildings, car windows and aircraft windshields take into account the protection of transient glare. Polymer dispersed liquid crystal (PDLC) is a new type of electrochromic functional film, in which the liquid crystal is dispersed in the polymer matrix in a droplet state, and the difference in refractive index between the liquid crystal and the polymer makes the film transparent in light / Scattering state can be switched freely. PDLC film has the advantages of fast response, high optical contrast, and easy large-scale preparation, and is considered to be the most promising protective material. However, there are still some technical problems with PDLC films: firstly, PDLC needs to be continuously powered on when it is in a transparent state, which...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1334G02F1/1337G02F1/1333
CPCG02F1/1334G02F1/133788G02F1/1337G02F1/133305G02F1/13345G02F1/13347
Inventor 朱嘉琦张智博杨磊杨亚楠张锐聪闵萍萍张昕宇姬栋超
Owner HARBIN INST OF TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com