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Organic molecule-modulated phase evolution of inorganic mesostructures
Sun, Junming1; Ma, Ding1; Zhang, He1; Jiang, Feng1; Cui, Yi1; Guo, Rong2; Bao, Xinhe1
刊名LANGMUIR
2008-03-18
DOI10.1021/la702991r
24期:6页:2372-2380
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary
研究领域[WOS]Chemistry ; Materials Science
关键词[WOS]BLOCK-COPOLYMER SOLUTIONS ; MESOPOROUS SILICA SBA-15 ; MORPHOLOGICAL CONTROL ; TRIBLOCK COPOLYMERS ; SYSTEM ; WATER ; SOLUBILIZATION ; SURFACTANT ; TRANSITION ; VESICLES
英文摘要The involvement of alkane in the Pi23-TEOS-NH4F-H3O+ synthesis system alters the phase behavior of the complex emulsion system dramatically. Changing one of the reaction parameters (such as the initial reaction temperature, IRT) will result in diverse solution mesostructures. With subsequent condensation of silicate species, interesting inorganic materials with various mesostructures are obtained. The present work is aimed at understanding the phase evolution behavior of this complex alkane (C-6-C-12)-P-123-TEOS-NH4F-H3O+ emulsion system, with emphasis on the influence of alkane chain number (ACN) and IRT. HREM (high-resolution electron microscopy), XRD (X-ray diffraction), nitrogen sorption, FFEM (freeze-fracture electron microscope), and interfacial tension techniques have been used to investigate the phase behavior of the emulsion system and the structure of the inorganic products. A linear relationship between the phase-transformation temperature (PTT) and ACN has been established, which could be attributed to the modification of alkane with respect to the hydrophobic-hydrophilic properties of the complex emulsion system. Moreover, the right combination of reaction temperature, ACNs, and thus-induced swelling of hydrophobic PPO blocks as well as the modification of hydrophilicity of PEO brushes by silicate oligmers is the driving force in altering the packing parameter/geometry of the copolymers surfactant (P123) aggregates. This leads to the diverse structures of the obtained mesoporous silicas. A temperature-induced phase-transformation mechanism has also been proposed and discussed.
语种英语
WOS记录号WOS:000253941000017
引用统计
被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/141009
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Yangzhou Univ, Sch Chem & Chem Engn, Yangzhou 250002, Jiangsu, Peoples R China
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Sun, Junming,Ma, Ding,Zhang, He,et al. Organic molecule-modulated phase evolution of inorganic mesostructures[J]. LANGMUIR,2008,24(6):2372-2380.
APA Sun, Junming.,Ma, Ding.,Zhang, He.,Jiang, Feng.,Cui, Yi.,...&Bao, Xinhe.(2008).Organic molecule-modulated phase evolution of inorganic mesostructures.LANGMUIR,24(6),2372-2380.
MLA Sun, Junming,et al."Organic molecule-modulated phase evolution of inorganic mesostructures".LANGMUIR 24.6(2008):2372-2380.
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