Unlock instant, AI-driven research and patent intelligence for your innovation.

Method of detecting content of boric acid in polarizing film

A detection method and polarizing film technology, applied in the direction of chemical analysis by titration method, can solve the problems of interference, cumbersome detection process, expensive detection equipment, etc., and achieve simple operation method, high repeatability and strong flexibility sexual effect

Inactive Publication Date: 2019-05-10
SHENZHEN SAPO PHOTOELECTRIC
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of detection method can only be used for qualitative detection, or requires derivation before detection, has a lot of interference, or the detection process is cumbersome to operate, and the detection equipment is expensive, etc.
[0004] The preparation of the polarizing film has gone through processes such as polyiodide ion dyeing and boric acid crosslinking. The complexity of the internal structure and the instability of polyiodide ions are likely to cause serious interference to the above detection methods, resulting in uncertainty in the detection results.

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 of detecting content of boric acid in polarizing film
  • Method of detecting content of boric acid in polarizing film
  • Method of detecting content of boric acid in polarizing film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Establishment of boric acid mass-NaOH solution volume standard mathematical model:

[0033] Weigh 0.0643g, 0.1239g, 0.1954g, 0.2370g, 0.3147g, 0.3735g, 0.4396g of boric acid and dissolve them in 25.00ml of pure water to obtain target mass concentrations of 0.25%, 0.50%, 0.75%, 1.00%, 1.25%, 1.50%, 1.75% (the actual preparation mass concentration is described in Table 1) boric acid solution to be measured, prepare 1mol / L NaOH standard solution, read the consumed NaOH standard solution volume after titration. Take the quality of boric acid as the ordinate, and the volume of NaOH standard solution as the abscissa, and obtain the standard mathematical model of the quality of boric acid-NaOH solution volume by the linear fitting method: m=k*V+b, where m is the quality of boric acid in the solution, and V is Titration consumes the volume of NaOH standard solution, k is the titration coefficient, and b is the correction constant. The results are shown in Table 1:

[0034]...

Embodiment 2

[0047]1. Establishment of boric acid mass-NaOH solution volume standard mathematical model:

[0048] Weigh 0.2525g, 0.5102g, 0.7732g, 1.0417g, 1.3158g, 1.5957g, 1.8817g of boric acid and dissolve them in 25.00ml of pure water to obtain target mass concentrations of 1.00%, 2.00%, 3.00%, 4.00%, respectively. 5.00%, 6.00%, 7.00% (the actual preparation mass concentration is described in the table) boric acid solution to be measured, take the operating method in Example 1. The results are shown in Table 4:

[0049] Table 4 boric acid quality-NaOH solution volume standard mathematical model titration result

[0050]

[0051] 2. Standard mathematical model verification:

[0052] Arbitrarily weigh an appropriate amount of boric acid within the allowable range of the mass concentration of the standard mathematical model and take the detection method of the present invention to measure, calculate the theoretical mass of boric acid in the solution according to the standard mathemat...

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

No PUM Login to View More

Abstract

The invention discloses a method of detecting content of boric acid in a polarizing film. The method comprises following steps of: S1, through the operation of weak acid titration by strong base, determining a chemical equilibrium constant and establishing a standard mathematical model; S2, checking and correcting the standard mathematical model; S3, pre-processing the polarizing film, and including drying, dissolving and removing color of the polarizing film; and S4, detecting content of boric acid in the solution and calculating content of boric acid in the polarizing film, titrating contentof boric acid in the polarizing film solution by using 1mol / L of NaOH standard solution, calculating content ml of boric acid in the solution by using standard mathematical models of consumed NaOH standard solution volume V and boric acid mass-NaOH standard solution volume, and calculating to obtain mass concentration wt of boric acid in the polarizing film, wherein wt%=ml / m0*100%. The method canmonitor and feed back content of boric acid in the polarizing film in production and process adjustment of polaroids, providing guide suggestion for production of high quality polaroids.

Description

technical field [0001] The invention relates to the field of production and manufacture of iodine-based polarizing films for liquid crystal displays, in particular to a method for detecting the content of boric acid in the polarizing film, in particular to a method for detecting the content of boric acid in the iodine-based polarizing film. Background technique [0002] Polarizer is an essential optical component in LCD display terminal applications. As an optical switch device, it determines the transmission and closure of the optical path. The most core and most difficult part in the polarizer manufacturing process is the preparation process of polarizing film. In the preparation process of the polarizing film, boric acid is used as a cross-linking agent, because boric acid can complex with hydroxyl-rich polyols to form a boron ester compound with a stable structure, which can enhance the dimensional stability of the polarizing film and improve the polarizing performance ...

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
IPC IPC(8): G01N31/16
Inventor 陈学文陈敏李广鑫
Owner SHENZHEN SAPO PHOTOELECTRIC