abstract |
ABSTRACT A method for preparing an aqueous polyacrylamide solution is described. The method comprises: - hydrating acrylonitrile in water in the presence of a biocatalyst capable of converting acrylonitrile to acrylamide in order to obtain an acrylamide solution, - directly polymerizing the acrylamide solution in order to obtain a polyacrylamide gel, and - dissolving Directly polyacrylamide gel by adding water to obtain an aqueous polyacrylamide solution. |