Research And Development Of Heat-Storage And Thermo-Regulated Worsted Woolen Fabric

Since the late1980s, heat-storage and thermo-regulated textiles began to appear. After years of exploration and research for the development of the temperature and heat insulation textiles technology has gradually matured. At present, researchers mainly use phase change materials to develop textiles with the effect of storage temperature insulation. This material can spontaneously transform phase by means of endothermic and exothermic according to the change of temperature, and the transformation is reversible and infinite. When the outside temperature raises to the melting point of the phase change materials, it starts melting endothermic and releasing heat storage. As the temperature drops, the phase change materials phase change occurs again, at the same time materials release the stored heat for regulating the temperature. Because the phase change materials have such unparalleled intelligence, they are increasingly favored by the majority of scientific workers.The objective of research project is developing the heat-storage and thermo-regulated worsted woolen fabric. Using phase change materials as raw materials to form microcapsules, and it is applied to wool fabrics through a specific process to prepare the thermal control fabric. Meanwhile, the thermal and taking performance of fabric is also researched. Finally, the heat-storage and thermo-regulated worsted woolen fabric is developed.At first, using melamine and formaldehyde condensation of melamine resin as phase-change microcapsules shell material and paraffin waxes as core materials, then phase-change microcapsules with white powder is prepared by using in situ polymerization way. Evaluation of microcapsules appearance structure is conducted by SEM. Using DSC tests phase transition temperature and enthalpy to characterize the thermal effect of microcapsules, in the heating the phase change temperature is about23.8-25.6℃, melting heat of the phase change is213.5J/g; in the cooling the phase change temperature is about21.7-24.3℃, the crystalline phase change heat is214.3J/g. The infrared spectra of the material tested and analyzed spectra. Spectrum shows the2950cm-1C-H department has a strong absorption peak, so it can prove that the core material is coated in the microcapsule. Broadly consistent with the standard infrared spectra of melamine resin, so it can explain that the shell material is melamine resin.Secondly, the phase-change microcapsules mixed with additives and prepared finishing agents, then microencapsulated phase change is applied to the fabric by the mean of impregnation and coating.Next, the thermal effect, thermal stability and the effect of tempering temperature fabric were characterized by means of DSC, thermo-gravimetric analysis and surface temperature test. The TG/DTG curves shows that impregnated fabric and coated fabric respectively appeared a larger weightlessness peak at143.6℃and175.2℃. At this point indicates the beginning of the two fabrics severe thermal degradation. DSC analysis and tempering curve shows that the effect of thermal effects and thermostat of coated fabrics is slightly better than impregnated fabrics.Finally, this paper characterizes fabric performance metrics by testing the suction height, infiltration diameter, ventilation rate, bending stiffness, strength and elongation. According to the experimental results, the moisture conductivity property, permeability and softness of the coated fabric is not so good as impregnated fabric, but the mechanical property of the coated fabric is excellent.In the development process of heat-storage and thermo-regulated worsted fabric, for the phase-change microcapsules and wool fabric, the subject did the research of the preparation process and performance testing. However, due to time is limited, process optimization remains to be strengthened.So hope to have in-depth research in the future.