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Investigation into Molecular Diffusion in Hydrogels Using the Refractive Index Method
Author(s) -
Weng Lihui,
Zhou Xianju,
Zhang Xianmin,
Zhang Lina,
Xu Jian
Publication year - 2002
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/1521-3927(200211)23:16<968::aid-marc968>3.0.co;2-o
Subject(s) - refractive index , diffusion , self healing hydrogels , materials science , optics , molecular diffusion , refraction , step index profile , diffusion process , photon diffusion , anomalous diffusion , refractometer , analytical chemistry (journal) , chemistry , optoelectronics , composite material , polymer chemistry , thermodynamics , physics , chromatography , graded index fiber , operations management , fiber optic sensor , fiber , metric (unit) , knowledge management , innovation diffusion , computer science , layer (electronics) , economics
An in‐situ refractive index method is applied to study the diffusion process of sucrose in hydrogels. Diffusion was monitored by recording the refraction of a laser beam when passing through a triangular hydrogel cell. The distribution of refractive index changes was obtained from the deviated distance of the linear beam and converted to the distribution of concentration. By employing Fick's second law, the diffusion behavior was investigated and the diffusion coefficient was obtained.Schematic picture of the refractive index equipment to study the diffusion process.