| Heat-storage and thermoregulated textile is a novel comfort one. It is manufactured by incorporating the low-temperature Phase Change Material (PCM) into the fiber or coating the PCM on the surface of the fabric. This novel comfortable textile is able to absorb, redistribute and release heat energy by phase state change of PCM according to the changing of circumstance temperature. If the circumstance temperature drops from the setting temperature, the PCM will change its state from liquid to solid, releasing heat energy and keeping the inner fabric in a higher temperature. Conversely, if the circumstance temperature rises from the setting temperature, the PCM will change its state from solid to liquid, absorbing the heat energy and keeping the fabric in a lower temperature. Thus the inner textile possesses a comfortable temperature by the PCM phase state changing. Heat-storage and thermo-regulated textile is an active smart textile, which is one of the most important comfortable textile products since Gore-Tex during the last two decades.It is an object to study the manufacture process and properties of photothermal conversion and thermoregulated fibers in the applied basic field. These fibers are able to not only convert near infrared ray and visible light into heat energy, but also absorb or release the heat energy according to the circumstance temperature changing.After measuring the absorbing properties of the ZrC, SiC and AlaOa powder while exposed to near infrared ray and visible light through using infrared lamp, camera lamp, SiC stick with external booster, infrared-thermometer, the polypropylene fibers were melt spun with ZrC content from 0 to 8%(wt/wt) and with 4%(wt/wt) SiC, separately. The structures and photothermal conversion, thermal stability and stress-strain properties of these fibers were studied by using DSC, TG, infrared lamp, camera lamp, SiC stick with external booster and infrared-thermometer etc.The microencapsulated phase change materials (microPCMs) with diameters below 10 micron were successfully synthesized by in-situ polymerization. Low-temperature PCM-paraffin wax was used as core material, and urea-melamine-formaldehyde copolymer was used as shell material. The structures and properties were systematically studied by the applying of DSC, TG, SEM and LM etc.The photothermal conversion and thermoregulated fibers were manufactured by melting spun process through using microPCMs and photothermal conversion ceramic as functional components, and polypropylene as fiber-forming material. The relationship between structure and properties of these fibers were systematically studied through using DSC, TG, SEM and LM etc. The experimental results show that:1. The heat energy absorbing properties of the same ceramic powder are evidently affected by the wavelength of infrared ray. Different ceramic powder possesses different absorbing ability to same wavelength of light. The absorbing properties of ZrC and SiC powders to near infrared ray are better than that of A12O3.2. The photothermal conversion properties of the fibers and non-woven are affected by the content of the ceramic. With the increasing of the ceramic content, the photo-thermal conversion ability of the fiber and nonwoven will rise continuously. However, when the content of ZrC exceeds 4%(wt/wt), the photothermal conversion ability will descend.3. Comparing to the polypropylene nonwoven, the photo-thermal conversion nonwoven has better properties of heat-storage and heat-insulation. The maximum difference in temperature of two type of nonwoven is 7.4 癈 (temperature of photo-thermal conversion fiber nonwoven minus that of PP one) when exposed to near infrared ray. And the maximum difference in temperature between photo-thermal conversion fiber nonwoven and PP sample is 1.6癈 when cut off the ray. And the experiment results show that the photo-thermal conversion fiber has better light absorbing property to the near infrared ray and visible light. The photo-thermal conversion fiber can trans... |
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