Study On The Antibacterial, Acid And Alkali Corrosion Polypropylene

This paper studied the preparation of the antibacterial polypropylene and the acid and alkali corrosive polypropylene. Via the test in different types of modifiers and the ratio of materials under antibacterial rate, acid and alkali corrosion rate, to determine the optimum ratio of the election materials, studied mechanical properties of composite system and crystallization performance.Use of inorganic antimicrobial materials, metal ion / nano-titanium dioxide antibacterial agent (Ag+-TiO₂ antibacterial agents) and organic quaternary ammonium antibacterial agent (CTAB) as an antibacterial modifier, so that by adding rare-earthβcrystal nucleating agent for PPR modified material has antibacterial properties. The results showed that appropriate antibacterial agent on the inorganic surface treatment can effectively improve the antibacterial agent and the substrate PPR compatibility; Ag+-TiO₂ antibacterial agent antibacterial is superior to the selected organic quaternary ammonium antibacterial agent, its Escherichia coli, Staphylococcus aureus antibiotic rates were 93.8% 99.2%, 91.7% 98.2%, while CTAB on the Escherichia coli, Staphylococcus aureus, respectively, the best antibacterial rate 91.0%, 91.4%. Also found that, Ag+-TiO₂ antibacterial agent to a certain extent reduce the material toughness. In the isothermal crystallization process, the antibacterial agent Ag+-TiO₂ inhibited the WBGâ…¡matrix of PPR induction ofβ-crystal, while the organic antibacterial agent CTAB joining PPR system to improve the crystallization rate, so that crystal ball size can be refined . Join antibacterial agent Ag+-TiO₂ and CTAB can effectively increase both the composite melting and crystallization temperature, reducing the time of crystalline nucleation supercooling.This choice of inorganic nano-silica and nano-alumina composite modifier to improve the acid and alkali corrosive by the WBGâ…¡random copolymer polypropylene modified materials. The results show that, Al₂O₃/SiO₂/PPR modified materials and WBGâ…¡/Al₂O₃/SiO₂/PPR materials compared to pure PPR, acid and alkali resistance have been upgrading the performance. Join Al₂O₃/SiO₂ and WBGâ…¡improve the performance of material processing, WBGâ…¡accession to refine the grain, but because of the presence of Al₂O₃/SiO₂ a certain degree of inhibition of the WBGâ…¡into a nuclear capability, so that slow down the crystallization rate. In order to have the best modified materials overall performance, based on acid properties, mechanical properties and processing performance, the performance ratio in WBGâ…¡/Al₂O₃/SiO₂/PPR, 0.3/1.4/0.6/100, as the best formula.