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A kind of preparation method of vanadium dioxide uniformly dispersed pet film

A technology of vanadium dioxide and uniform dispersion is applied in the field of preparation of PET films in which vanadium dioxide is uniformly dispersed, and can solve problems such as uniform dispersion of nano-phase, and achieve the effect of good application range and prospect.

Active Publication Date: 2015-11-11
SHANGHAI ZIDONG CHEM MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to uniformly disperse the nanophase into the polyester matrix has always been a difficult problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Blending: Use vanadium dioxide with a particle size of 50nm and a mass of 0.5% of the weight of terephthalic acid, and disperse vanadium dioxide in ethanol at a mass ratio of vanadium dioxide to ethanol of 1:100 to form a uniform The dispersion liquid is then mixed with ethylene glycol to obtain a uniform mixed liquid, and the molar ratio of ethylene glycol to terephthalic acid is 1.2:1;

[0041]Esterification reaction: prepare terephthalic acid and the homogeneous mixed solution into a uniform slurry, then add it to the reaction kettle, control the nitrogen atmosphere, the temperature is 90°C, keep the temperature for 30 minutes until all the ethanol is evaporated; then carry out the esterification reaction, The esterification product was obtained, and the esterification reaction was carried out in a nitrogen atmosphere, the pressure was controlled at 0.4 MPa, the temperature was controlled at 250° C., and the esterification water distilled amount reached 90% of the the...

Embodiment 2

[0045] Blending: Use vanadium dioxide with a particle size of 25nm and a mass of 2.5% of the weight of terephthalic acid, and disperse vanadium dioxide in ethanol at a mass ratio of vanadium dioxide to ethanol of 1:150 to form a uniform The dispersion liquid is then mixed with ethylene glycol to obtain a uniform mixed liquid, and the molar ratio of ethylene glycol to terephthalic acid is 1.6:1;

[0046] Esterification reaction: prepare terephthalic acid and the homogeneous mixed solution into a uniform slurry, then add it to the reactor, control the nitrogen atmosphere, keep the temperature at 95°C, and keep the temperature for 40 minutes until all the ethanol is evaporated; then carry out the esterification reaction, The esterification product was obtained, and the esterification reaction was pressurized in a nitrogen atmosphere, the pressure was controlled at 0.3 MPa, the temperature was controlled at 245° C., and the distilled amount of esterification water reached 90% of th...

Embodiment 3

[0050] Blending: use vanadium dioxide with a particle size of 10nm and a mass of 5% of the weight of terephthalic acid, and disperse vanadium dioxide in ethanol at a mass ratio of vanadium dioxide to ethanol of 1:200 to form a uniform The dispersion liquid is then mixed with ethylene glycol to obtain a uniform mixed liquid, and the molar ratio of ethylene glycol to terephthalic acid is 2.0:1;

[0051] Esterification reaction: prepare terephthalic acid and the uniform mixed solution into a uniform slurry and then add it to the reactor, control the nitrogen atmosphere, the temperature is 100°C, keep the temperature for 45 minutes until all the ethanol is evaporated; then carry out the esterification reaction, The esterification product was obtained, and the esterification reaction was carried out in a nitrogen atmosphere, the pressure was controlled at 0.4 MPa, the temperature was controlled at 230° C., and the esterification water distilled amount reached 90% of the theoretical ...

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Abstract

The invention relates to a preparation method of a PET (polyester) film with uniformly dispersed vanadium dioxide. The method comprises the following steps: (1), uniformly dispersing vanadium dioxide in PET; (2), preparing a PET film, specifically, uniformly dispersing the nano vanadium dioxide in alcohol by using alcohol as a dispersing agent to obtain a dispersing solution, then mixing ethylene glycol with the dispersing solution by using the characteristic that the ethylene glycol and the alcohol are mutually soluble to obtain a uniform mixing solution, finally blending the mixing solution with terephthalic acid to obtain a uniform slurry, synthesizing the PET after evaporating the alcohol, uniformly dispersing the vanadium dioxide in the PET, and then performing a film-drawing process to obtain the PET film with uniformly dispersed vanadium dioxide. Compared with the prior art, the PET film with uniformly dispersed vanadium dioxide, provided by the invention, is higher room temperature transmittance and lower in high temperature transmittance for the solar energy radiation, and better in application range and prospect.

Description

technical field [0001] The invention relates to a preparation method of a PET film containing vanadium dioxide, in particular to a preparation method of a PET film uniformly dispersed in vanadium dioxide. Background technique [0002] PET is currently one of the most widely used synthetic polymers. PET was synthesized as early as the 1940s and found to have excellent properties, and is widely used in textiles, packaging, medical and health, automobiles, Electronic appliances, safety protection, environmental protection and other fields. With the progress of society and the improvement of people's living standards, the performance requirements of PET are getting higher and higher, and more and more diverse. [0003] Vanadium dioxide has attracted the attention of many researchers because it undergoes a metal-semiconductor phase transition at 68 °C. Under low temperature conditions, vanadium dioxide has high transmittance in visible light, infrared light, radio frequency ban...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08K3/22C08G63/183
Inventor 徐志强李文刚胡国跃张萍
Owner SHANGHAI ZIDONG CHEM MATERIALS