Antimicrobial activity of geopolymers ion-exchanged with copper ions

作者：Hashimoto Shinobu^*; Machino Tatsuya; Takeda Hayami; Daiko Yusuke; Honda Sawao; Iwamoto Yuji

来源：Ceramics International, 2015, 41(10): 13788-13792.

DOI：10.1016/j.ceramint.2015.08.061

• Antimicrobial activity
• Copper ions
• Geopolymers
• Oyster mushroom
• Rot fungi

Geopolymers made from metakaolin and an alkali solution were immersed in a 0.1 mol/L copper chloride solution for 24 h. After the solution treatment, the surface color of the geopolymers changed to green to a depth of 900 mu m due to ion exchange with copper ions. To evaluate the antimicrobial activity of the colored portion of the geopolymer, it was ground into 500 mu m particles and mixed with a 10:1 mass ratio of oyster mushroom (a wood-rot fungus) and sawtooth oak sawdust. This mixture was placed in a glass bottle at room temperature and 100% relative humidity for one week. The results revealed that the geopolymer ion-exchanged with copper ions suppressed the growth of oyster mushrooms in sawtooth oak sawdust, indicating antimicrobial activity.

• 出版日期2015-12