抗菌涂料、油漆

日常生活中,涂料和油漆是家具生产、居室装修必不可少的材料。涂料和油漆发展的一个方向是抗菌涂料、油漆。所谓抗菌,是指在一定时间内抑制细菌的生长和繁殖。抗菌涂料、油漆是在油漆、涂料中加入抗菌剂,使涂料、油漆具有抗菌的功能。工程塑料国家工程研究中心生产的抗菌剂具有抗菌效率高、抗菌时间长、抗菌谱广、添加量少、价格合理等特点。添加１％～１－５％的抗菌剂,即可使涂料、油漆对金黄色葡萄球菌、大肠杆菌等葛兰氏细菌的抑菌率达９９％以上,对霉菌及真菌的生长也有明显的抑制作用。抗菌剂对人体无毒无害,也不会影响涂料原有…     

Tensile properties of hot rolled Mg_(97)Zn_1Y_2 alloy sheets at elevated temperatures

The elevated temperature tensile properties of Mg97Zn1Y2 magnesium alloy sheets, hot rolled at 390, 420 and 450 ℃ respectively, were tested in a temperature range from room temperature to 250 ℃ with a strain rate of 1.0×10-3 s-1. The results show that the variations in yield strength for Mg97Zn1Y2 magnesium alloy sheets hot rolled at 390 ℃ and 420 ℃ with temperature resemble each other due to their similar morphology of the chain-shaped strengthening phase. The yield strength maintains at a high level of 283 MPa before 200 ℃ and decreases significantly at 250 ℃. Despite of the fine lamellar structure of Mg97Zn1Y2 magnesium alloy sheet hot rolled at 450 ℃, its yield strength decreases linearly owing to occurrence of the coarse grain, and drops to 239 MPa at 250 ℃. The elongation for all hot rolled Mg97Zn1Y2 magnesium alloy sheets increases slightly with increasing testing temperature.