<p>A method for the encapsulation and triggered-release of water-soluble or water-dispersible materials. The method comprises a) providing an amount of electrolyte having a charge, b) providing an amount of counterion having a valence of at least 2, c) combining the polyelectrolyte and the counterion in a solution such that the polyelectrolyte self-assembles to form aggregates, d) adding a compound to be encapsulated, and e) adding nanoparticles to the solution such that nanoparticles arrange themselves around the aggregates. Release of the encapsulated species is triggered by disassembly or deformation of the microcapsules though disruption of the charge interactions. This method is specifically useful for the controlled viscosity reduction of the fracturing fluids commonly utilized in the oil field.</p>
申请公布号
WO2007002690(A3)
申请公布日期
2007.04.19
申请号
WO2006US25026
申请日期
2006.06.26
申请人
WILLIAM MARSH RICE UNIVERSITY;RANA, ROHIT, K.;MURTHY, VINIT, S.;WONG, MICHAEL, S.;NORMAN, LEWIS, R.
发明人
RANA, ROHIT, K.;MURTHY, VINIT, S.;WONG, MICHAEL, S.;NORMAN, LEWIS, R.