关键词: 银离子 水合硅 抗菌剂 双股流工艺, 银离子, 水合硅, 抗菌剂, 双股流工艺

Abstract: Antibacterial industry in China has grown into a new industry with annual output value of 70 billion yuan in just a few years. Although inorganic antibacterial agents added to the finished products more or less have some antibacterial effect，but the dispersion，adsorption and reinforcement are not satisfactory. Sulfuric acid and sodium silicate were used with silver ions loading in a double stream process to synthesize a green hydrated silica inorganic antibacterial agent. The synthesis process was simple，low cost，and the product was resistant to discoloration，highly reinforcing and highly dispersive. Antibacterial rate of E. coli，was 100%，especially for antibacterial plastic products. The influence of synthesis conditions on the appearance，performance and antibacterial effect was studied and prevention of oxidation discoloration of silver ions with additives was also investigated. The optimal loading condition was temperature 95 ℃，stirring rate 400r/min，pH 2，molar ratio of hydrated silicon slurry and silver ion loading 50∶1，mass ratio of additive in slurry 0.05%.

Key words: silver ion antibacterial agent hydrated silicon double stream process., silver ion, hydrated silicon, antibacterial agent, double stream process