Department of Bioengineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan.
Phys Rev Lett. 2020 Dec 31;125(26):267801. doi: 10.1103/PhysRevLett.125.267801.
The equation of state of the osmotic pressure for linear-polymer solutions in good solvents is universally described by a scaling function. We experimentally measure the osmotic pressure of the gelation process via osmotic deswelling. We find that the same scaling function for linear-polymer solutions also describes the osmotic pressure throughout the gelation process involving both the sol and gel states. Furthermore, we reveal that the osmotic pressure of polymer gels is universally governed by the semidilute scaling law of linear-polymer solutions.
在良溶剂中，线性聚合物溶液的渗透压状态方程普遍由一个标度函数描述。我们通过渗透压去湿实验测量了凝胶化过程中的渗透压。我们发现，对于线性聚合物溶液同样的标度函数也描述了整个凝胶化过程中的渗透压，包括溶胶态和凝胶态。此外，我们揭示了聚合物凝胶的渗透压普遍受线性聚合物溶液的半浓标度律支配。
