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Solution film-forming drying device

A drying device and solution film-forming technology, applied in measuring devices, optical devices, instruments, etc., can solve problems such as the influence of final product performance, solvent residue, inability to determine, etc., to achieve the optimization of solution processing and molding conditions and the improvement of quality. Effect

Active Publication Date: 2022-06-24
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process, the solvent removal process is as important as the dissolution process. At present, the solvent is generally removed by drying at high temperature to volatilize the solvent. During this process, phase separation, crystallization, voids, poor compactness, and solvent residues may occur. and other defects, and the film drying process is often a black box process, which can be seen as the state after the material is formed, but there is no way to determine what the intermediate process is like, and the material forming process has a great influence on the performance of the final product. big impact

Method used

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Examples

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example 1

[0149] First, dry triacetate (TAC) in a vacuum oven at 120 degrees Celsius for 24 hours, and then prepare a mixed solution for dissolving solid triacetate (TAC), using dichloromethane as the main solvent and methanol as a co-solvent to make the mixture solvent.

[0150] The weight ratio of methylene chloride and methanol is 9:1, the plasticizer content is 8%, and the solid TAC content is 20%. Mix the mixed solvent, plasticizer and TAC evenly, and place them together in a glass bottle with mechanical stirring. The TAC was dissolved for 5 hours, and the stirring speed was 100 rpm, and then it was allowed to stand for two hours to remove air bubbles.

[0151] Debug the main body of the solution film-forming drying device horizontally, prepare the quality inspection device for debugging, connect the data acquisition computer, turn on the data acquisition mode, and then use the film coating machine to coat the triacetate solution on the quartz glass plate, quickly Transfer to the ...

example 2

[0161] First, polyvinyl alcohol (PVA) was dried in a vacuum oven at 120 degrees Celsius for 24 hours, and then an aqueous solution was prepared for dissolving solid polyvinyl alcohol, which was used as a solvent for polyvinyl alcohol, and the content of solid polyvinyl alcohol accounted for 30%. The agent content is 5%, and the plasticizer mainly includes a compound of glycerol, low molecular weight polyethylene glycol or polyol esters, and amide agents. The polyvinyl alcohol was added to the water prepared in proportion, and placed together in a high temperature and high pressure reaction kettle at 150 degrees Celsius, 0.5 MPa, and mechanical stirring was used for 5 hours to dissolve the polyvinyl alcohol. hours to remove air bubbles.

[0162] The main body of the solution film forming and drying device is horizontally debugged, the quality inspection device is ready for debugging, the data acquisition computer is connected, the data acquisition mode is turned on, and then th...

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Abstract

The invention discloses a solution film-forming drying device. The device comprises a supporting main body; the volatilization control chamber is arranged in the supporting main body, and a sample in the film forming process is placed in the volatilization control chamber; the ventilation device is connected with the volatilization control chamber and used for providing hot air needed in the film forming process; the optical performance detection device comprises a light source unit arranged below the volatilization control chamber and used for generating a measurement light beam emitted towards the sample; and the detection unit is arranged above the volatilization control chamber, is arranged on the supporting main body and is used for detecting the polarization characteristic of the measurement light beam after penetrating through the sample so as to determine the optical information of the sample. By arranging the optical performance detection device, the film forming state in the solution processing and forming process is detected in real time, so that the intermediate change process of forming a thin film by drying and volatilizing a solvent is obtained, the solution processing and forming conditions are optimized, and the quality of the thin film is improved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a solution film-forming drying device. Background technique [0002] Polymer materials are widely used to replace traditional materials (inorganic non-metallic materials and metal materials) and to continuously expand new applications. [0003] The film forming methods of polymer materials mainly include melt processing and solution processing. Melt processing is a processing method that heats the material to a molten state to give shape and corresponding properties. It is generally suitable for materials with relatively low melting point and softening point. , such as polypropylene (PP), polyethylene (PE), polybutylene (PB), polystyrene (PS), polyethylene terephthalate (PET), polycarbonate (PC), polymethane methyl acrylate (PMMA), nylon (PA), etc. [0004] However, there are still some materials whose degradation temperature is close to or lower than their melting te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L101/00G01D21/02G01N21/25G01B11/06G01N5/04G01N23/201
CPCC08J5/18G01D21/02G01N21/25G01B11/06G01N5/04G01N23/201C08J2300/00Y02E60/10
Inventor 李良彬吴同安敏芳
Owner UNIV OF SCI & TECH OF CHINA