Modification of Membranes for Improved Water Filtration
JHU REF: C13272
Invention Novelty: A novel method for enhancing the anti-adhesive and antimicrobial properties of membranes used in water filtration.
Value Proposition: Although membrane filtration is a popular technique for water purification, the use of these systems has been limited by the formation of biofilms, microorganisms that collect on the surface of the membrane. Biofilm formation can diminish the overall performance of the membrane, increase energy consumption of the system, and shorten the lifespan of the membrane. This new technology involves modification of the polymeric membrane to impart antimicrobial properties onto the polymer surface, inactivating any microorganisms that deposit on the membrane and preventing the formation of biofilms. Additionally, the hydrophilic nature of the modified membrane surface reduces the propensity for microorganisms to attach to membrane surface.
Additional advantages of this system include:
- Simple and scalable method to modify the surface of membranes
- Enhanced bacterial anti-adhesive properties and significant antimicrobial properties observed experimentally
- Modification method can be applied in situ on existing membranes that are currently in use
- Low levels of leaching of silver particles observed
Technical Details: Johns Hopkins researchers have developed a novel method for modification of polymeric membranes incorporating both polydopamine (PDA) and silver nanoparticles imparting the hydrophilicity of PDA with the antimicrobial effects of silver onto the membrane. The membrane was fully characterized and exhibited enhanced anti-adhesive properties, inhibition of bacterial growth, and low leaching of silver particles into the filtered water.
Looking for Partners: To develop and commercialize the technology for use in formation of novel antimicrobial membranes in water treatment, wastewater reuse, and other water filtration applications.
Stage of Development: Prototype
Data Availability: Under CDA/NDA
Patent Status: Pending
Publication(s)/Associated Cases: Tang, L.; Livi, K.J.T.; Chen, K.L. Environ. Sci. Technol. Lett., 2015, 2 (3), pp 59-65.
Categories: Materials
Keywords: membrane filtration, water treatment, , anti-adhesive, antimicrobial, polydopamine, silver nanoparticles, biofouling
