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Investigation on the function of nonionic surfactant during the compressed CO2-mediated periodic mesoporous organosilicas formation

Abstract

Abstract: A systematic study on the structural properties and component information of periodic mesoporous organosilicas synthesized by using different nonionic surfactants as template with the compressed CO2 was carried out. Triblock copolymer (F127, F108, and P123), oligomeric alkyl poly (ethylene oxide) (Brij-58 and Brij-76), and alky-phenol poly (ethylene oxide) (TX-100) have been employed as the templates and BTEB as bridged organosilica precursor to synthesize the PMOs materials at 5.90 MPa. The structure and character of the obtained materials were investigated by means of transmission electron microscope (TEM), Nitrogen sorption isotherms, solid Si and C NMR, and FTIR. Efforts have also been made to compare the differences of structural and morphological properties among these samples synthesized under similar conditions. We also investigate the synthesis of PMOs with F127 as template at different CO2 pressures. It was found that the interaction between different organic silica precursors and surfactants with a variety of hydrophilic and hydrophobic chains is the key factor for the disorder degree of mesostructure. On this basis, the possible mechanism of formation of PMOs synthesized by nonionic surfactant (triblock copolymer) as template with compressed CO2 were illustrated and discussed.

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Publication details

The article was received on 07 Jun 2017, accepted on 12 Jul 2017 and first published on 12 Jul 2017


Article type: Paper
DOI: 10.1039/C7SM01134B
Citation: Soft Matter, 2017, Accepted Manuscript
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    Investigation on the function of nonionic surfactant during the compressed CO2-mediated periodic mesoporous organosilicas formation

    W. Li, C. Wang, M. Zhang, X. huang, S. Li, S. Luan, X. Hou and Q. wang, Soft Matter, 2017, Accepted Manuscript , DOI: 10.1039/C7SM01134B

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