Pore morphology of porous polymer particles probed by NMR relaxometry and NMR cryoporometry

被引：38

作者：

Hansen, EW

Fonnum, G

Weng, E

机构：

[1] Univ Oslo, Dept Chem, NO-0315 Oslo, Norway

[2] Invitrogen Corp, N-2001 Lillestrom, Norway

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2005年 / 109卷 / 51期

关键词：

D O I：

10.1021/jp055175f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 (p(2)) were determined to be K = (420 +/- 50) K angstrom and p(2) = (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.

引用

页码：24295 / 24303

页数：9

共 35 条

[1] Internal surfaces of porous media studied by nuclear magnetic resonance cryoporometry [J].

Allen, SG ;

Stephenson, PCL ;

Strange, JH .

JOURNAL OF CHEMICAL PHYSICS, 1998, 108 (19) :8195-8198

[2] PROBLEMS IN IDENTIFYING MULTIMODAL DISTRIBUTIONS OF RELAXATION-TIMES FOR NMR IN POROUS-MEDIA [J].

BROWN, RJS ;

BORGIA, GC ;

FANTAZZINI, P ;

MESINI, E .

MAGNETIC RESONANCE IMAGING, 1991, 9 (05) :687-693

[3]

BROWNSTEIN K, 1979, PHYS REV, V71, P3589

[4] Paramagnetic effects of iron(III) species on nuclear magnetic relaxation of fluid protons in porous media [J].

Bryar, TR ;

Daughney, CJ ;

Knight, RJ .

JOURNAL OF MAGNETIC RESONANCE, 2000, 142 (01) :74-85

[5] NUCLEAR MAGNETIC-RELAXATION AND THE INTERNAL GEOMETRY OF SEDIMENTARY-ROCKS [J].

COHEN, MH ;

MENDELSON, KS .

JOURNAL OF APPLIED PHYSICS, 1982, 53 (02) :1127-1135

[6] APPLICATION OF NUCLEAR MAGNETIC-RESONANCE PORE STRUCTURE-ANALYSIS TO POROUS SILICA GLASS [J].

DORAZIO, F ;

TARCZON, JC ;

HALPERIN, WP ;

EGUCHI, K ;

MIZUSAKI, T .

JOURNAL OF APPLIED PHYSICS, 1989, 65 (02) :742-751

[7] Effect of paramagnetic ions on NMR relaxation of fluids at solid surfaces [J].

Foley, I ;

Farooqui, SA ;

Kleinberg, RL .

JOURNAL OF MAGNETIC RESONANCE SERIES A, 1996, 123 (01) :95-104

[8] Rotational fluctuations of water inside the nanopores of SBA-type molecular sieves [J].

Frunza, L ;

Kosslick, H ;

Pitsch, I ;

Frunza, S ;

Schönhals, A .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (18) :9154-9159

[9] A NMR TECHNIQUE FOR THE ANALYSIS OF PORE STRUCTURE - APPLICATION TO MATERIALS WITH WELL-DEFINED PORE STRUCTURE [J].

GALLEGOS, DP ;

MUNN, K ;

SMITH, DM ;

STERMER, DL .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1987, 119 (01) :127-140

[10]

Gibbs J.W., 1928, COLLECTED WORKS J W

← 1 2 3 4 →