Experimental demonstration of the stabilization of colloids by addition of salt Academic Article uri icon

abstract

  • Controlling the stability of a colloidal suspension is key to processing and using materials ranging from ferrofluids to gemstones. Suspended particles can be stabilized either sterically by adding short surfactant molecules or polymers, or electrostatically via repulsion, if the particles bear a common charge. In the latter case, addition of salt generally decreases the repulsion between particles and leads to their coagulation. However, here researchers demonstrate and explain how addition of salt to a colloidal suspension actually can $s\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}a\phantom{\rule{0}{0ex}}b\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}l\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}z\phantom{\rule{0}{0ex}}e$ it.

publication date

  • August 28, 2014