Hansen Eddy W, Fonnum Geir, Weng Ellen
Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, NO-0315 Oslo, Norway.
J Phys Chem B. 2005 Dec 29;109(51):24295-303. doi: 10.1021/jp055175f.
The pore size distribution (PSD) and pore connectivity (PC) within porous polymer particles are probed by combining NMR cryoporometry and NMR relaxometry (spin-spin relaxation). With water as a probe molecule, the constant K in the so-called Gibbs-Thompson equation and the surface relaxivity (rho2) were determined to be K = (420 +/- 50) KA and rho2 = (0.44 +/- 0.01) x 10(-6) ms(-1), respectively. Also, the thickness of the interface layer was estimated to be of the order of one monolayer of water molecules. A detailed analysis of the complete set of NMR data enabled the morphology or pore structure to be probed, and is thoroughly discussed in the text.
通过结合核磁共振低温孔度测定法和核磁共振弛豫测量法（自旋 - 自旋弛豫），对多孔聚合物颗粒内的孔径分布（PSD）和孔连通性（PC）进行了探测。以水作为探针分子，所谓吉布斯 - 汤姆逊方程中的常数K和表面弛豫率（ρ2）分别确定为K = (420 ± 50) KA和ρ2 = (0.44 ± 0.01) × 10⁻⁶ ms⁻¹。此外，界面层的厚度估计约为一个水分子单层的厚度。对整套核磁共振数据的详细分析能够探测形态或孔结构，并在文中进行了深入讨论。
