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Titolo:
Formation of aqueous core polyamide microcapsules obtained via interfacialpolycondensation - Optimization of the membrane formation through pH control
Autore:
Zydowicz, N; Chaumont, P; Soto-Portas, ML;
Indirizzi:
Univ Lyon 1, Mat Polymeres & Biomat Lab, UMR 5627, F-69622 Villeurbanne, France Univ Lyon 1 Villeurbanne France F-69622 27, F-69622 Villeurbanne, France
Titolo Testata:
JOURNAL OF MEMBRANE SCIENCE
fascicolo: 1, volume: 189, anno: 2001,
pagine: 41 - 58
SICI:
0376-7388(20010731)189:1<41:FOACPM>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
FLIGHT MASS-SPECTROMETRY; MICROENCAPSULATION; POLYMERIZATION; POLYMERS;
Keywords:
polyamide; microcapsules; interfacial polycondensation; chemical structure; C-13 NMR; MALDI-TOF MS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Zydowicz, N Univ Lyon 1, Mat Polymeres & Biomat Lab, UMR 5627, Batiment ISTIL, F-69622Villeurbanne, France Univ Lyon 1 Batiment ISTIL Villeurbanne France F-69622 France
Citazione:
N. Zydowicz et al., "Formation of aqueous core polyamide microcapsules obtained via interfacialpolycondensation - Optimization of the membrane formation through pH control", J MEMBR SCI, 189(1), 2001, pp. 41-58

Abstract

The formation of aqueous core polyamide microcapsules via interfacial polymerization of a polyoxypropylenediamine (JA) in water and sebacoyl chloride(CS) dissolved in organic phase is studied. The originality of this work consists, firstly in the use of a diamine, which is an oligomer and pH control of the aqueous phase, and secondly in the control of the chemical structure by advanced techniques such as C-13 NMR and MALDI-TOF mass spectrometry. The aim was to determine the optimal conditions which allow the formationof microcapsules. Thus, the emulsification process was first investigated with the aim to optimize the stability of the emulsion, which precedes the formation and the control of the size of the microcapsules. The optimization of the formulation of the system was then considered, in terms of monomerratio, surfactant concentration and most important the pH of the aqueous phase. The chemical structure of the microcapsules was studied by FTIR, 13C NMR and MALDI-TOF mass spectrometry. Thermal properties of the polyamide membranes were also studied by thermal gravimetric analysis (TGA). Optical microscopy and laser light diffraction allowed the determination of the size of the microcapsules. Finally, the morphology was observed by scanning electron microscopy (SEM). (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 23:38:18