As electronic devices get smaller and more powerful, energy density of energy storage devices inc... more As electronic devices get smaller and more powerful, energy density of energy storage devices increases continuously, and moving components of machinery operate at higher speeds, the need for better thermal management strategies is becoming increasingly important. The removal of heat dissipated during the operation of electronic, electrochemical, and mechanical devices is facilitated by high-performance thermal interface materials (TIMs) which are utilized to couple devices to heat sinks. Herein, we report a new class of TIMs involving the chemical integration of boron nitride nanosheets (BNNS), soft organic linkers, and a copper matrix - which are prepared by chemisorption coupled electrodeposition approach. These hybrid nanocomposites demonstrate bulk thermal conductivities ranging from 211 to 277 W/(m.K), which are very high considering their relatively low elastic modulus values on the order of 21.2 to 28.5 GPa. The synergistic combination of these properties lead to the ultra-l...
In this talk, a novel approach based on the complexation and supramolecular assembly of an amino-... more In this talk, a novel approach based on the complexation and supramolecular assembly of an amino-amide and maleic acid to control viscosity of aqueous displacement fluids will be described. The addition of only 2 wt % of adaptable amphiphile/maleic acid into water increases the viscosity of water by 4.5x105 times. This superior viscosity behavior is ascribed to the formation and entanglements of layered cylindrical supramolecular assemblies having diameters of several hundred nanometers. Furthermore, the viscosity of the amphiphile solution can be increased 12 times by changing pH from 4 to 8 in a reversible manner. Such a property can be very beneficial for oil recovery applications when the injectivity becomes a limitation. In addition, the use of switchable viscosity can reduce the energy cost associated with pumping large volumes of viscous displacement fluids. We also demonstrate the proof-of-concept for the use of adaptable amphiphile solutions in EOR as oil displacement fluid...
We report a novel approach that is based on the complexation and supramolecular assembly of an am... more We report a novel approach that is based on the complexation and supramolecular assembly of an amino-amide and maleic acid to control viscosity of aqueous displacement fluids. It is shown that the addition of only 2 wt% of adaptable amphiphile/maleic acid into water increases the viscosity of water by a factor of 4.5x105. This superior viscosity behavior is ascribed to the formation and entanglements of layered cylindrical supramolecular assemblies with diameters of several hundred nanometers. Furthermore, the viscosity of the amphiphile solution can be increased 12 times by changing pH from 4 to 8 in a reversible manner. Such a property can be very beneficial for oil-recovery applications when the injectivity becomes a limitation. In addition, the use of switchable viscosity can reduce the energy cost associated with pumping large volumes of viscous displacement fluids. We also demonstrate the proof of concept for the use of adaptable amphiphile solutions in enhanced oil recovery (EOR) as oil-displacement fluids through column experiments. Overall, this study shows that pH-switchable supramolecular assemblies have very intriguing properties that can significantly affect EOR technologies.
As electronic devices get smaller and more powerful, energy density of energy storage devices inc... more As electronic devices get smaller and more powerful, energy density of energy storage devices increases continuously, and moving components of machinery operate at higher speeds, the need for better thermal management strategies is becoming increasingly important. The removal of heat dissipated during the operation of electronic, electrochemical, and mechanical devices is facilitated by high-performance thermal interface materials (TIMs) which are utilized to couple devices to heat sinks. Herein, we report a new class of TIMs involving the chemical integration of boron nitride nanosheets (BNNS), soft organic linkers, and a copper matrix - which are prepared by chemisorption coupled electrodeposition approach. These hybrid nanocomposites demonstrate bulk thermal conductivities ranging from 211 to 277 W/(m.K), which are very high considering their relatively low elastic modulus values on the order of 21.2 to 28.5 GPa. The synergistic combination of these properties lead to the ultra-l...
In this talk, a novel approach based on the complexation and supramolecular assembly of an amino-... more In this talk, a novel approach based on the complexation and supramolecular assembly of an amino-amide and maleic acid to control viscosity of aqueous displacement fluids will be described. The addition of only 2 wt % of adaptable amphiphile/maleic acid into water increases the viscosity of water by 4.5x105 times. This superior viscosity behavior is ascribed to the formation and entanglements of layered cylindrical supramolecular assemblies having diameters of several hundred nanometers. Furthermore, the viscosity of the amphiphile solution can be increased 12 times by changing pH from 4 to 8 in a reversible manner. Such a property can be very beneficial for oil recovery applications when the injectivity becomes a limitation. In addition, the use of switchable viscosity can reduce the energy cost associated with pumping large volumes of viscous displacement fluids. We also demonstrate the proof-of-concept for the use of adaptable amphiphile solutions in EOR as oil displacement fluid...
We report a novel approach that is based on the complexation and supramolecular assembly of an am... more We report a novel approach that is based on the complexation and supramolecular assembly of an amino-amide and maleic acid to control viscosity of aqueous displacement fluids. It is shown that the addition of only 2 wt% of adaptable amphiphile/maleic acid into water increases the viscosity of water by a factor of 4.5x105. This superior viscosity behavior is ascribed to the formation and entanglements of layered cylindrical supramolecular assemblies with diameters of several hundred nanometers. Furthermore, the viscosity of the amphiphile solution can be increased 12 times by changing pH from 4 to 8 in a reversible manner. Such a property can be very beneficial for oil-recovery applications when the injectivity becomes a limitation. In addition, the use of switchable viscosity can reduce the energy cost associated with pumping large volumes of viscous displacement fluids. We also demonstrate the proof of concept for the use of adaptable amphiphile solutions in enhanced oil recovery (EOR) as oil-displacement fluids through column experiments. Overall, this study shows that pH-switchable supramolecular assemblies have very intriguing properties that can significantly affect EOR technologies.
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