Achieving a wearable artificial kidney hinges on overcoming the critical challenge of developing efficient urea adsorption materials for dialysate regeneration. An acidic hollow polystyrene nanoparticle was synthesized by modified emulsion polymerization, DMF etching and sulfuric acid treatment sequentially. The nanoparticles had a urea absorption capacity of up to 1 mmol/g after two hours of adsorption in a 30 mM urea aqueous solution at 37 °C. Additionally, the adsorption capacity dramatically increased with increasing urea concentration, while sharply decreased with increasing ionic strength.
- Yiheng Huang
- Yifan Jiang
- Yong Guo
