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2 results about "Aqueous two-phase system" patented technology
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Aqueous biphasic systems (ABS) or aqueous two-phase systems (ATPS) are clean alternatives for traditional organic-water solvent extraction systems. ABS are formed when either two polymers, one polymer and one kosmotropic salt, or two salts (one chaotropic salt and the other a kosmotropic salt) are mixed at appropriate concentrations or at a particular temperature. The two phases are mostly composed of water and non volatile components, thus eliminating volatile organic compounds. They have been used for many years in biotechnological applications as non-denaturing and benign separation media. Recently, it has been found that ATPS can be used for separations of metal ions like mercury and cobalt, carbon nanotubes, environmental remediation, metallurgical applications and as a reaction media.
Preparation method of multifunctional sensing hollow gel fiber based on aqueous two-phase system
This invention discloses a method for preparing multifunctional sensing hollow gel fibers based on an aqueous two-phase system. The technical solution is based on an aqueous two-phase system formed by polyvinyl alcohol (PVA) and dextran in water. Using a coaxial spinning process, a PVA solution is injected into the shell channel of a coaxial spinning device, and a dextran solution is injected into the core channel. Relying on the ultra-low tension between the two aqueous phase interfaces, the PVA solution and dextran solution after extrusion are kept in a parallel laminar flow state. After coagulation treatment, a core-shell structure gel fiber is obtained. Subsequently, it undergoes solvent evaporation treatment, water washing treatment, and eutectic solvent replacement to finally prepare the hollow gel fiber. The gel fiber of this invention possesses stretchability, compression resilience, high conductivity, and a wide operating temperature range. It can be made into multidimensional sensors and humidity sensors to monitor strain, direction, pressure, and humidity, exhibiting considerable sensitivity and stability.
Owner:ZHENGZHOU UNIV