Preparation Of Efficient Photo--catalyst And Its Influences On 3D Printing Plastic Material

A series of research on modified titanium dioxide (titanium dioxide) were made with tea polyphones or mica as a doping substance. Experiments were prepared by sol-gel method with different temperatures and doping amounts. The photo- catalytic properties were evaluated by degradation of organic dyes. Then the phase morphology,surface morphology, chemical functional structure, specific surface area, the energy band structure of modified titanium dioxide were investigated. In this paper, the3D printingplastic materials ABS/titanium dioxide (modified titanium dioxide by tea polyphones or mica)were prepared by extrusion granulation method. Effects of the preparation by fused deposition or injection modingon morphology, mechanical properties were studied. The mechanicalproperty of ABS/titanium dioxideand those of pure ABS before and after aging test were compared. The main conclusions are listed as follows:Firstly, tea polyphones were employed to modify titanium dioxide Adding tea polyphones to the titanium gel with certain proportion.The photo- catalyst which can degrade organic dye in the visible light was successfully achieved by the sol-gel method under the condition of low temperature. The experimental results show that the highest photo- catalytic performance attain when the doping amounts at 1.0 g and the calcination temperature at 200?. With the irradiation of the visible light for 1 hour, the degradation rate in solution of methyl orange was 94.8%.Secondly, mica were employed to modify titanium dioxide.The results of ultraviolet spectrogram analyses indicate that the best photo- catalytic performance was made with 4g of mica at the temperature of 200?. The tetracycline hydrochloride can be degraded 99.5% in the ultraviolet light for 1 hour.Thirdly, a series of ABS and titanium dioxide blend materials were prepared by extrusion granulation with containing 2wt% titanium dioxide. ABS modified by titanium dioxide improved its mechanical properties.which better than the commercial titanium dioxide. The finishing product by FDM had good effect and smooth appearance.It is conducive for the development and need in the market. Then, with the irradiation of the visible light for 10 hour, the degradation rate of the blend, in which titanium dioxide modified by tea polyphones,in solution of methylene blue was 90%.with the irradiation of the ultraviolet light for 10 hour, the degradation rate of the blend,in which titanium dioxide modified by mica,in solution of tetracycline hydrochloride was 43.2%.Finnally, the aging conduct of titanium dioxide modified ABS Materials were researched. With artificial accelerated aging for fifteen day, the retention rate of titanium dioxide modified ABS by two kinds of modingpreparationmethod on tensile strength and notched impact strength were improved relatively more than pure ABS.Nevertheless,the mechanical properties of materials by FDM moding preparation were lower than those by injection moding.Retention rateafter UV irradiation for fifteen day were higher Comparingwith Business P25, the anti-aging effect of ABS/titanium dioxide modified by tea polyphones or mica is also more obvious.