Glucose monitoring by viscometric sensing of polymeric fluid
A polymeric sensing fluid for detecting the presence of glucose and systems and methods of its use are generally disclosed. The polymeric sensing fluid includes a polymer in a solvent (e.g., an aqueous solvent). The polymer has a plurality of boronic acid moieties extending from its polymeric backbone. As such, the polymeric sensing fluid is configured to increase in viscosity upon addition of glucose due to crosslinking between the boronic acid moieties of the polymer and glucose.
1. A method for detecting and differentiating the presence of glucose from other monosaccharides and disaccharides in a sample, the method comprising
exposing a polymeric sensing fluid of a viscometric sensor device to the sample, wherein the polymeric sensing fluid comprises a polymer having an acrylic polymeric backbone with a plurality of boronic acid moieties attached, wherein the polymer comprises poly(acrylamide-ran-3-acrylamidophenylboronic acid) formed by polymerizing N-3-acrylamidophenylboronic acid and acrylamide in the presence of 2,2′-azobisisobutyronitrile, and wherein the poly(acrylamide-ran-3-acrylamidophenylboronic acid) comprises N-3-acrylamidophenylboronic acid monomer from about 0.1% to about 10% by mole of the poly(acrylamide-ran-3-acrylamidophenylboronic acid), and
measuring a viscosity increase in the polymeric sensing fluid using the viscometric sensor device, thereby differentiating and detecting the presence of glucose from other monosaccharides and disaccharides in the sample.
2. The method of claim 1 , wherein the poly(acrylamide-ran-3-acrylamidophenylboronic acid) comprises the N-3-acrylamidophenylboronic acid monomer from about 0.5% to about 8% by mole of the poly(acrylamide-ran-3-acrylamidophenylboronic acid).
3. The method of claim 1 , wherein the poly(acrylamide-ran-3-acrylamidophenylboronic acid) comprises the N-3-acrylamidophenylboronic acid monomer from about 1% to about 6% by mole of the poly(acrylamide-ran-3-acrylamidophenylboronic acid).
4. The method of claim 1 , wherein the poly(acrylamide-ran-3-acrylamidophenylboronic acid) comprises the N-3-acrylamidophenylboronic acid monomer from about 2% to about 5% by mole of the poly(acrylamide-ran-3-acrylamidophenylboronic acid).
5. The method of claim 1 , wherein the poly(acrylamide-ran-3-acrylamidophenylboronic acid) comprises acrylamide monomer from about 90% to about 99.9% by mole of the poly(acrylamide-ran-3-acrylamidophenylboronic acid).
6. The method of claim 1 , wherein the poly(acrylamide-ran-3-acrylamidophenylboronic acid) comprises acrylamide monomer from about 92% to about 99.5% by mole of the poly(acrylamide-ran-3-acrylamidophenylboronic acid).
7. The method of claim 1 , wherein the poly(acrylamide-ran-3-acrylamidophenylboronic acid) comprises acrylamide monomer from about 94% to about 99% by mole of the poly(acrylamide-ran-3-acrylamidophenylboronic acid).
8. The method of claim 1 , wherein the 2,2′-azobisisobutyronitrile is present in the poly(acrylamide-ran-3-acrylamidophenylboronic acid) from about 0.1% to about 1% of the molar amount of the N-3-acrylamidophenylboronic acid monomer.