Preparation and application of antibacterial and antistatic SAN materials
The antibacterial and antistatic styrene-acrylonitrile copolymer(SAN)compounds were prepared with SAN,inor-ganic antibacterial agent,permanent antistatic agent,compatilizer,lubricant and glass fiber by melt blending method with parallel twin screw extruder.The effects of antibacterial agents,permanent antistatic agents,compatilizer content and lubricant content on the properties of the obtained material were investigated.The results show that zinc ion antibacterial agent has better broad-spectrum antibacterial effect on SAN materials compared with silver ion antibacterial agent and silver zinc composite ion antibacterial agent.Among the 3 kinds of polyoxyethylene polymer antistatic agents,when 6500 is used as antistatic agent,the surface resistivity of SAN material is the lowest and the mechanical properties are the best.When the content of compatibilizer styrene-maleic anhydride(SMA)is 5.0 wt%,the overall performance of the achieved material is the best.When the dosage of lubricant bifunctional ethylene bis fatty acid amide(TAF)is 0.5 wt%,the compound has excellent comprehensive performance.When the mass ratios of the zinc ion antibacterial,permanent antistatic agent 6500,compatibilizer SMA and lubricant TAF reach 0.5 wt%,10 wt%,5 wt%and 0.5 wt%respectively,the antibacterial ratio of the obtained compound reaches more than 99.9%,mildew proof grade is 0-level,surface resistivity is 1.8×1010 Ω,the tensile strength is 96.3 MPa,the flexural strength is 127.5 MPa,the flexural modolus is 7 253.4 MPa,the notched impact strength is 6.8 kJ/m2.The function composites have been applied to cross-flow fan blades in air condition.
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