激光实时全息干涉法测量精氨酸在PAM水溶液中的扩散系数

Diffusivity Measurement of Arginine in PAM Aqueous Solution Using Real-time Holographic Interferometry

非牛顿流体是普遍存在的,而目前扩散理论的研究仅限于牛顿流体。为进一步对非牛顿流体中的扩散行为进行研究,利用激光实时全息干涉技术,测量了298.15 K时精氨酸在0.05%(质量分率)PAM水溶液中的扩散系数。测量结果表明,随精氨酸浓度的增大,扩散系数减小,接近线性变化;且与精氨酸在水溶液中扩散系数的变化趋势一致,但也表现出了PAM溶液的非牛顿流体特性。

Non-Newtonian fluid is common in the world, but the study of diffusion theory is only limited to Newtonian fluid. To further research of the diffusion behavior of non-Newtonian, a real-time holographic interferometer is used to measure the diffusivities of arginine in 0.05% （by mass）PAM aqueous solution at 298.15 K. The experimental results indicate that： the interaction of arginine molecular and PAM molecular has little influence on the actual volumes of diffusion molecular, and the major impact on diffusion coefficients is the molecular interaction-diffusion coefficient decreases with increasing arginine concentration, and the results are in agreement with the change trend of the diffusivities of arginine in aqueous solution.