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Titolo:
Morphological control of periodic mesoporous organosilica with agitation
Autore:
Park, SS; Lee, CH; Cheon, JH; Choe, SJ; Park, DH;
Indirizzi:
Inje Univ, Dept Chem, Kyungnam 621749, Kimhae, South Korea Inje Univ Kyungnam Kimhae South Korea 621749 621749, Kimhae, South Korea
Titolo Testata:
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
fascicolo: 9, volume: 22, anno: 2001,
pagine: 948 - 952
SICI:
0253-2964(20010920)22:9<948:MCOPMO>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOLECULAR-SIEVES; SURFACE PATTERNS; LAMELLAR SILICAS; ORGANIC GROUPS; CHANNEL WALLS; CURVED SHAPES; THIN-FILMS; COPOLYMER; TRIBLOCK; CRYSTAL;
Keywords:
morphological control; periodic mesoporous organosilica; agitation; long rope; gyroid;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Park, DH Inje Univ, Dept Chem, Kyungnam 621749, Kimhae, South Korea Inje Univ Kyungnam Kimhae South Korea 621749 Kimhae, South Korea
Citazione:
S.S. Park et al., "Morphological control of periodic mesoporous organosilica with agitation", B KOR CHEM, 22(9), 2001, pp. 948-952

Abstract

Periodic mesoporous organosilicas with rope-based morphology from a reaction gel composition of 1 BTME: 0.57 ODTMABr:236, NaOH:353 H2O were synthesized. While long rope-shaped product dominated in case of static synthesis condition, gyroid type products instead of rope shaped product appeared and rope shaped product disappeared with agitation. PMO with such a long rope shaped morphology is firstly reported. Additionally, various rope-based morphologies depending on the degree of bending, twisting, folding and winding of rope such as spirals, discoids, toroids, and worm-like aggregates were observed. White powdered products were characterized by X-ray diffraction, N-2 sorption measurement, SEM and TEM. From XRD pattern and TEM image, ODTMA-PMO with hexagonal symmetry was identified. The pore diameter and BET surface area of ODTMA-PMO are 32.9 Angstrom and 799 m(2)g(-1), respectively. Hexagonally arrayed channels ran with long axis of rope and rope-based shapes with various degree of curvature, which was elucidated by using TEM images.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 19:54:25