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Preparation method of polyoxometallate-polymer hybridized segmented copolymer nanotube

A polyoxometalate and block copolymer technology is applied in the field of preparation of polyoxometalate-polymer hybrid block copolymer nanotubes, which can solve the problems of degradation, acidity sensitivity and the like, and achieve reproducibility. The effect of good performance, low cost and easy operation

Inactive Publication Date: 2010-12-15
NANKAI UNIV
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Problems solved by technology

A research group organically modified polyoxometallates in Keggin configuration, and used self-assembly technology to control its structure, and obtained conical and tubular structures (Xun Wang et al., Chem.Mater., 21, 3745 (2009)), but the polyoxometalates of the Keggin configuration are sensitive to the acidity of the environment in aqueous solution, and will degrade when the pH value changes

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  • Preparation method of polyoxometallate-polymer hybridized segmented copolymer nanotube
  • Preparation method of polyoxometallate-polymer hybridized segmented copolymer nanotube
  • Preparation method of polyoxometallate-polymer hybridized segmented copolymer nanotube

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Embodiment

[0021] 1) Preparation of precursor solution

[0022] Using the aforementioned patented technology to prepare molecular weight It is a polyoxometalate-polymer hybrid block copolymer of 119,000g / mol, wherein the polyoxometalate is an organic ammonium salt of a Dawson structure phosphotungstovanadium polyoxometalate [(n-C 4 h 9 )N] 5 [H 4 P 2 V 3 W 15 o 62 ], the small molecule initiator is hydroxyethyl bromoisobutyrate, the connecting molecule is trihydroxymethylaminomethane, atom transfer radical polymerization is adopted, the monomer is styrene, and the polymer is polystyrene.

[0023] Polyoxometalate-polymer hybrid block copolymer is used as nanotube substrate material, and N,N-dimethylformamide is used as solvent to prepare polyoxometalate-polymer hybrid block copolymer Add 001×7 type strongly acidic styrene-based cation-exchange resin to a solution with a ratio of 2.5 mg / mL to N,N-dimethylformamide, which accounts for 30% of the volume of the solution, and the solu...

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Abstract

The invention relates to a preparation method of a polyoxometallate-polymer hybridized segmented copolymer nanotube, which comprises the steps of: (1) mixing a polyoxometallate-polymer hybridized segmented copolymer as a base material of the nanotube with N,N-dimethylformamide as a solvent to prepare a solution, and then adding strong-acid cation exchange resin to obtain a precursor solution; and (2) annealing the precursor solution at constant temperature of 70 DEG C for 24h, then annealing at constant temperature of 25 DEG C for 21 days to prepare the polyoxometallate-polymer hybridized segmented copolymer nanotube. The nanotube has a nuclear-shell structure with a polyoxometallate nanotube as a nuclear and polystyrene as a shell, and has the advantages of regular structure and good thermodynamic stability; and the preparation method has the advantages of simple process, easy operation, low cost and good repeatability. The nanotube has wide application values when being used as an ion channel on the aspects of a proton exchange of a fuel cell, and the like.

Description

technical field [0001] The invention relates to the preparation technology of nanometer materials, in particular to a preparation method of polyoxometalate-polymer hybrid block copolymer nanotubes. Background technique [0002] Nanomaterials are the frontier topic of nanotechnology research. Among many nanomaterials, nanotubes have broad application prospects in nano energy storage and nano catalysis due to their excellent physical and chemical properties. Since Drexler introduced the construction method of organisms into chemistry, the concept of self-assembly technology has gradually entered the field of macromolecular science. With the in-depth development of scientific research, self-assembly technology has also been applied to research fields such as induced assembly and ordered assembly of nanomaterials. [0003] Polyoxometalate is a kind of compound with electronegativity and special nanostructure, which is composed of transition metals such as molybdenum, tungsten a...

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Application Information

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IPC IPC(8): C08F293/00C08F8/00
Inventor 王维肖雨韩耀坤夏楠于伟
Owner NANKAI UNIV
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