TANGQiong-fang,WUShu-han,LIShi-yin,et al.Preparation of Nanosilver-loaded Modified Polyurethane Sponge and Its Application in Water Disinfection[J].China Water & Wastewater,2025,41(13):71-78.
Preparation of Nanosilver-loaded Modified Polyurethane Sponge and Its Application in Water Disinfection
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第41卷
Number:
第13期
Page:
71-78
Column:
Date of publication:
2025-07-01
- Keywords:
- polyurethane sponge; chitosan; polyethylene polyamine; nanosilver; disinfection
- Abstract:
- The development of a sustainable and environmentally friendly silver nanocomposite material capable of achieving safe and efficient point-of-use (POU) water disinfection remains a challenge. In this paper, a simple and easy method was proposed to successfully prepare polyethylene polyamine grafted chitosan/polyurethane composite sponges (CS-g-PEPA/PUF@Ag) uniformly loaded with silver nanoparticles (AgNPs). The physicochemical properties of CS-g-PEPA/PUF@Ag were characterized and their bacteriostatic/bactericidal effects against E. coli as well as the feasibility of their application for disinfection of real natural water bodies were investigated. The results showed that the introduction of CS-g-PEPA hydrogel on the surface of PUF not only enabled the modified sponge to be loaded with more AgNPs (20.1 mg/g), but also effectively controlled the slow release of silver (the rate of silver release was limited to less than 0.07% after immersion in water for 24 h). CS-g-PEPA/PUF@Ag exhibited highly efficient bactericidal activity, which could reach 100% killing of bacteria within 20 min of contact with the bacterial solution. This may be due to the increased hydrophilicity of CS-g-PEPA/PUF@Ag, which was able to absorb microbially contaminated water faster and bring the bacterial strains therein into contact with the AgNPs to improve the disinfection efficiency. In addition, CS-g-PEPA/PUF@Ag has commendable repeatable disinfection efficacy and can effectively disinfect actual natural water.
Last Update:
2025-07-01