Membranes

Water Filtration Membranes

Pressure-driven membrane filtration is one of the most mature and prevalently used water purification methods in households. It involves forcing a liquid through a filter membrane with high surface area. There are four basic pressure-driven membranefiltration processes for liquid separations (in ascending order of particle size that can be separated):

  • Reverse osmosis
  • Nanofiltration
  • Ultrafiltration
  • Microfiltration

Bridgedots has worked on various membranes used in water filtration, including membranes based on Polyerthersulfone, Polysulfone, Polyviinlydieneflouride and Cellulose Acetate for applicationsin reverse osmosis, nanofiltration and ultrafiltration.

PVDF-Based Membranes for Lithium Ion Batteries

Lithium ion batteries are the most promising systems in mobile applications. They have a wide spectrum of use from high-grade electronic equipment (e.g. mobile telephones, camcorders) to batteries for electrically driven motor vehicles.

Li-ion batteries consist of a cathode, anode, separator and non-aqueous electrolyte. Polymer-based gel-like microporous membrane acts as the separator in Li-ion batteries. The membrane functions as an insulating layer between the electrodes, and can shut down the current flow in case of any abnormal condition;the heat generated closes the micropores. The microporous membrane is therefore indispensable for improving the battery safety.

Bridgedots has the rich technical knowhow and the required expertise for the development of efficient microporous membranes for Li-ion batteries.

Non-Porous PVDF-Based Membranes

Non-porous membranes are widely used in technological applications involving the piezo-, pyro- and ferroelectric effect.

Bridgedots, equipped with the required technical acumen, is working in the field of non-porous PVDF membrane development, which is used in electro-optical, electromechanical and biomedical applications.