KR-20260066386-A - Thermochromic Dielectric Heater Composition and Thermochromic Dielectric Heater

KR20260066386AKR 20260066386 AKR20260066386 AKR 20260066386AKR-20260066386-A

Abstract

The present invention relates to a PVC-based thermochromic dielectric heater composition and a thermochromic dielectric heater. A thermochromic dielectric heater composition according to an embodiment of the present invention comprises a polymer resin; a plasticizer and a thermochromic pigment. The content ratio of the polymer resin and the plasticizer may be 1:5.5 to 1:6.5 based on weight.

Inventors

배진우
장준순
이유성
홍나래
방수정

Assignees

한국기술교육대학교 산학협력단

Dates

Publication Date: 20260512
Application Date: 20241104

Claims (12)

Polymer resin; Plasticizers and containing thermochromic pigments Thermochromic dielectric heater composition.
In paragraph 1, The content ratio of the polymer resin and the plasticizer is 1:5.5 to 1:6.5 based on weight, Thermochromic dielectric heater composition.
In paragraph 1, The content ratio of the polymer resin and the thermochromic pigment is 1:0.1 to 1:0.3 based on weight, Thermochromic dielectric heater composition.
In paragraph 1, The above polymer resin is polyvinyl chloride (PVC), Thermochromic dielectric heater composition.
In paragraph 1, The above plasticizer is DBA, Thermochromic dielectric heater composition.
A step of preparing a polymer solution by dissolving a polymer resin in an organic solvent; A step of preparing a mixture by mixing a plasticizer and a thermochromic pigment into the above polymer solution; A step comprising drying the above mixture, Method for manufacturing a thermochromic dielectric heater layer.
In paragraph 6, The content ratio of the polymer resin to the plasticizer in the above mixture is 1:5.5 to 1:6.5 based on weight, Method for manufacturing a thermochromic dielectric heater layer.
In paragraph 6, The content ratio of the polymer resin and the thermochromic pigment in the above mixture is 1:0.1 to 1:0.3 based on weight, Method for manufacturing a thermochromic dielectric heater layer.
It includes an electrode and a thermochromic dielectric heater layer connected to the electrode, The above thermochromic dielectric heater layer is that of claim 6, Electrochromic dielectric heater device.
Step of preparing the first electrode; A step of forming a thermochromic dielectric heater layer using a thermochromic dielectric heater composition and The method includes the step of placing the thermochromic dielectric heater layer on the first electrode, and The above thermochromic dielectric heater composition is that of claim 1, Method for manufacturing an electrochromic dielectric heater device.
In Paragraph 10, In the thermochromic dielectric heater composition above, the content ratio of the polymer resin to the plasticizer is 1:5.5 to 1:6.5 based on weight, Method for manufacturing an electrochromic dielectric heater device.
In paragraph 10 In the thermochromic dielectric heater composition above, the content ratio of the polymer resin and the thermochromic pigment is 1:0.1 to 1:0.3 based on weight, Method for manufacturing an electrochromic dielectric heater device.

Description

PVC-based Thermochromic Dielectric Heater Composition and Thermochromic Dielectric Heater The present invention relates to a PVC-based thermochromic dielectric heater composition and a thermochromic dielectric heater. This invention is the result of research conducted with support from the 2024 Korea University of Technology and Education LINC 3.0 project. Thermochromic dielectric heaters are attracting attention as devices that provide temperature control, visual feedback, and energy efficiency by utilizing dielectric properties and thermochromic characteristics, which change color when a specific temperature is reached. These heaters are primarily manufactured by adding pigments to polymer-based substrates, and when voltage is applied, electrical energy is converted into thermal energy, causing the surface temperature of the heater to rise and the color to change accordingly. These thermochromic dielectric heaters can be utilized in various fields, such as home appliances, building materials, and medical devices, and offer significant advantages, particularly in that users can visually and immediately determine the operating status or temperature of the heater. Conventional thermochromic dielectric heaters lack flexibility, which limits their application in environments where they are bent or curved. Additionally, they suffer from poor thermal stability at high temperatures, leading to performance degradation or material deformation during prolonged use. FIG. 1 is a flowchart of a method for manufacturing a thermochromic dielectric heater layer according to an embodiment of the present invention. Figure 2 shows the stress-strain curve analysis results of the thermochromic dielectric heater layer. Figure 3 shows the measurement results of the dielectric constant of a thermochromic dielectric heater. Figure 4 is a graph of the temperature change over time of a thermochromic dielectric heater. Figure 5 is a photograph showing the temperature change of a thermochromic dielectric heater. Hereinafter, preferred embodiments of the present invention are described as follows with reference to the attached drawings. However, embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. Furthermore, embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art. A thermochromic dielectric heater composition according to an embodiment of the present invention comprises a polymer resin; a plasticizer and a thermochromic pigment. The above polymer resin serves as a substrate for a thermochromic dielectric heater. The polymer resin acts as an electrical insulator, providing stability during the process of converting electrical energy into thermal energy, and imparts flexibility, enabling use in various application environments. Furthermore, the polymer resin enhances thermal conductivity and, when combined with thermochromic pigments, ensures effective heat transfer and a distinct change in color in response to temperature variations. Additionally, the polymer resin possesses high heat resistance, maintaining its physical and chemical properties even during prolonged use, thereby ensuring stable performance of the heater. The above polymer resin may be polyvinyl chloride (PVC), polyurethane (PU), polysiloxane (silicone resin), polyethylene terephthalate (PET), etc., and preferably may be polyvinyl chloride. The above plasticizer improves the mechanical properties of the polymer resin and makes the material more flexible, thereby increasing processability and processability. Preferably, the main plasticizer may be dibutyl adipate (DBA). The content ratio of the polymer resin and plasticizer may be 1:5.5 to 1:6.5 based on weight. If the content of the main plasticizer is low, flexibility and mechanical properties decrease, whereas if it is too high, there is a problem of reduced mechanical strength and reduced heat resistance. The above thermochromic pigment is a material that changes color according to the temperature change of a thermochromic dielectric heater. In one embodiment, the thermochromic pigment may have the characteristic of changing color through a temperature rise that occurs when voltage is applied to the thermochromic dielectric heater, and returning to its original color when the voltage is cut off. In the present invention, the thermochromic pigment is not particularly limited and various types can be applied. In one embodiment, the thermochromic pigment may be an inorganic thermochromic pigment, a polymer thermochromic pigment, a leuco dye, etc. The content ratio of the polymer resin and the thermochromic pigment may be 1:0.1 to 1:0.3 based on weight, preferably 1:0.15 to 1:0.25. If the content of the thermochromic pigment is low, the color change is not clear, and conversely, if the content is too high, mechanical properties decrease a