Preparation And Characterization Of Taichi Masterbatch/PET Functional Composites

Exploitation and utilization of natural minerals is one of hot researches in the field of developing functional materials in recent years. As a natural ore, Taichi has releasing far infrared property, the radiation rate of 93.36%, the anti-ultraviolet function, antibacterial function and so on. Therefore, Taichi stone can be used in the research and development of new functional materials with a certain market value and social value.In this study, the structure and properties of Taichi masterbatch /PET composite fiber by melt spinning were researched, provide a good foundation for the subsequent spinning and weaving, but melt spun fiber is mainly suitable for weaving fabric, the application is relatively simple. Electrospun fiber membrane with fine diameter, strong surface activity and high porosity, not only can make functional composite fabrics gluing with other fabric, also can be used to make mask paper, female hygiene products, masks, gauze bandages and so on. Therefore, Electro-spinning was used to prepare Taichi masterbatch/PET functional composite fiber membranes, the effects of taichi nanoparticles content, spinning voltage and tip-target distance on the morphology, structure and properties of the composite fiber membranes were studied, and optimized the electrospinning process. Means of SEM, Infrared Spectrometer, X-ray diffraction, thermal gravimetric analysis(TGA), strength test, far infrared temperature rise test, and ultraviolet transmissibility test method etc. were used to respectively investigate morphology, molecular structure, crystallization performance, thermal stability, mechanical properties, far infrared radiation function and ultraviolet resistance of composite fiber membranes. The experimental results show that:1) Compared with the ordinary polyester fibers, the Taichi masterbatch/PET composite fibers prepared by melt spinning have rough surface and white granular materials, which can prove the existence of Taichi nanoparticles, and with the substrate to form a good interface structure, improve the crystallinity of the composite fiber, and the breaking strength was also improved. In addition, the emission rate of Taichi masterbatch /PET composite fiber is 88%, according to CAS115-2005 evaluation standard to prove that Taichi masterbatch/PET composite fibers have good far infrared properties.2) When the Taichi nanoparticle content is 3%, spinning voltage is 24 k V, spinning distance is 15 cm, Taichi masterbatch/PET composite fiber membranes with better dispersion, more uniform and smaller fiber diameter can be obtained. The existence of Taichi nanoparticles can’t obviously change the PET characteristic absorption peak position and shape, but there was a difference in the intensity of reflection. The existence of Taichi nanoparticles did not have obvious effect on the dispersion peak of PET in the vicinity of 2θ=22.26°, with the increase of nano particle content, dispersion peak kurtosis is slow, the crystallinity of the composite fiber decreased. In addition, with the increase of spinning voltage in an appropriate range, the crystallinity of the composite fiber can be increased gradually. However, the crystallization of the composite fibers can be decreased by the increase of the spinning distance.3) When the Taichi nanoparticle content was increased to 3%, the breaking strength of the composite fiber membrane was increased to 21.25 c N, and was obviously improved by 2.13 c N than that of pure PET membrane. With the constant nanoparticle content and spinning distance, when the spinning voltage was 24 kv, the breaking strength of the composite fiber membrane reached the maximum(24.97 c N). With the constant nanoparticle content and spinning voltage, when the spinning distance was 15 cm, the breaking strength of the composite fiber membrane reached the maximum(19.53 c N). The addition of a small amount of Taichi nanoparticles and the proper spinning voltage can improve the thermal stability of composite fiber membranes. The increasing of spinning distance can alleviate the thermal decomposition, and improve the thermal stability.4) With the increase of Taihci nanoparticle contents, the temperature rising property of composite fiber membrane was be better. When the Taichi nano-particles content is 7%, the temperature of composite fiber membranes was increased by 11.1℃ than that of pure PET fiber membrane at the same time. In addition, with the increasing of the nanoparticle content, the anti ultraviolet property of composite fiber membranes was be stronger. When the nano particles content was 7%, the shielding rate of composite fiber membrane to UVA and UVB were 99.2% and 99.4%, with strong anti-UV property.