ICCAS OpenIR
Organic-inorganic hybrid materials by self-gelation of block copolymer assembly and nanoobjects with controlled shapes thereof
Zhang, Ke; Gao, Lei; Chen, Yongming
2007-08-07
Source PublicationMACROMOLECULES
ISSN0024-9297
Volume40Issue:16Pages:5916-5922
AbstractRadical polymerization of a gelable monomer 3-(triethoxysilyl)propyl methacrylate (TEPM) mediated by a chain transfer agent (CTA), cumyl dithiobenzoate (CDB), i.e., reversible addition-fragmentation chain transfer (RAFT) polymerization, has been studied. A series of well-defined PTEPM-block-polystyrene (PTEPM-b-PS) diblock copolymers were synthesized via sequential RAFT polymerization of styrene mediated by the PTEPM macromolecular CTA. Both formations of PTEPM homopolymers and the PTEPM-b-PS diblock copolymers exhibited first-order kinetics, and the molecular weights increased linearly with monomer conversion. The bulk microphase separation behaviors of PTEPM-b-PS diblock copolymers were studied by a combination of small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). With change of the block composition, three different morphologies of microphase separation, i.e., lamellae, hexagonally packed cylinders, and spheres, were obtained. Afterward, self-gelation of the PTEPM phases was carried out in-situ to cross-link the PTEPM phase, and novel organic-inorganic hybrid bulk materials with ordered domain structures of three morphologies were obtained. Furthermore, when the gelated materials were dispersed in a good solvent for the PS matrix, the isolated organic-inorganic hybrid nanoobjects with controlled shapes including plates, cylinders, and spheres with PS hairs were prepared from the respective bulk materials. This self-gelation process of block copolymer aggregates in bulk can be universal and may be extended to prepare various ordered hybrid materials and isolated hybrid nanoobjects with tailored shapes and functionality.
DOI10.1021/ma070780x
Indexed BySCI
Language英语
WOS IDWOS:000248439700037
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:45[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/62390
Collection中国科学院化学研究所
Corresponding AuthorChen, Yongming
AffiliationChinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Joint Lab Polymer Sci & Mat, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Ke,Gao, Lei,Chen, Yongming. Organic-inorganic hybrid materials by self-gelation of block copolymer assembly and nanoobjects with controlled shapes thereof[J]. MACROMOLECULES,2007,40(16):5916-5922.
APA Zhang, Ke,Gao, Lei,&Chen, Yongming.(2007).Organic-inorganic hybrid materials by self-gelation of block copolymer assembly and nanoobjects with controlled shapes thereof.MACROMOLECULES,40(16),5916-5922.
MLA Zhang, Ke,et al."Organic-inorganic hybrid materials by self-gelation of block copolymer assembly and nanoobjects with controlled shapes thereof".MACROMOLECULES 40.16(2007):5916-5922.
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