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Titolo:
Self-assembly of poly(caprolactone-b-ethylene oxide-b-caprolactone) via a microphase inversion in water
Autore:
Zhao, Y; Liang, HJ; Wang, SG; Wu, C;
Indirizzi:
Chinese Univ Hong Kong, Dept Chem, Shatin, Hong Kong, Peoples R China Chinese Univ Hong Kong Shatin Hong Kong Peoples R China Peoples R China Chinese Acad Sci, Inst Chem, Lab Membranes & Med Polymers, Beijing 100080,Peoples R China Chinese Acad Sci Beijing Peoples R China 100080 g 100080,Peoples R China Univ Sci & Technol China, Dept Polymer Sci & Engn, Hefei 230026, Anhui, Peoples R China Univ Sci & Technol China Hefei Anhui Peoples R China 230026 oples R China Univ Sci & Technol China, Dept Chem Phys, Opening Lab Band Select Chem, Hefei 230026, Anhui, Peoples R China Univ Sci & Technol China Hefei Anhui Peoples R China 230026 oples R China
Titolo Testata:
JOURNAL OF PHYSICAL CHEMISTRY B
fascicolo: 4, volume: 105, anno: 2001,
pagine: 848 - 851
SICI:
1520-6106(20010201)105:4<848:SOPOVA>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
AQUEOUS-SOLUTION; TRIBLOCK COPOLYMERS; ENZYMATIC BIODEGRADATION; BLOCK-COPOLYMERS; MORPHOLOGIES; BEHAVIOR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Wu, C Chinese Univ Hong Kong, Dept Chem, Shatin, Hong Kong, Peoples R China Chinese Univ Hong Kong Shatin Hong Kong Peoples R China es R China
Citazione:
Y. Zhao et al., "Self-assembly of poly(caprolactone-b-ethylene oxide-b-caprolactone) via a microphase inversion in water", J PHYS CH B, 105(4), 2001, pp. 848-851

Abstract

Triblock copolymer poly(caprolactone-b-ethylene oxide-b-caprolactone) (PCL-PEO-PCL) could self-assemble into narrowly distributed flowerlike "core-shell" micelres when its tetrahydrofuran solution was added dropwise into an excess of water. The core was formed via the aggregation of insoluble hydrophobic PCL blocks, while the shell was made of many hydrophilic PEO loops. The formation and stabilization of such micelles were examined bl; a combination of static and dynamic laser light scattering. The average hydrodynamic size decreased as the dispersion temperature increased, but there was no change in the average radius of gyration, indicating that the temperature dependence of(Rh) during heating or cooling was attributed to the conformation change of the PEO block. The composition dependent study revealed that using two short PCL blocks and a long PEO block unexpectedly lead to smallermicelles. The study of their biodegradation in the presence of enzyme Lipase PS shows possible biomedical applications of such formed polymeric micelles.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 18:02:37