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Janus particle with double properties and preparation method thereof

A particle and colloidal particle technology, applied in the field of materials, can solve the problems of incomplete phase separation, Janus particles cannot be called real Janus particles, etc.

Inactive Publication Date: 2012-09-19
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, none of the Janus particles prepared by this method can be called real Janus particles, because the phase separation is not complete, and polymer B always exists in polymer A.

Method used

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  • Janus particle with double properties and preparation method thereof
  • Janus particle with double properties and preparation method thereof
  • Janus particle with double properties and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1, mass preparation Janus particles

[0043] Disperse 0.5 g of cross-linked polyacrylonitrile hollow spherical particles with a diameter of 400 nm and a degree of cross-linking of 50% (thickness of the shell layer is 100 nm) in 15 g of water, and ultrasonically disperse evenly to obtain a seed solution with a concentration of 3.2% by mass; in addition , 0.25g monomer styrene (St), 0.75g crosslinking agent divinylbenzene (DVB), 0.5g emulsifier sodium dodecylsulfonate (SDS), 0.5g mass percent concentration of 1% The aqueous solution of the potassium persulfate (KPS) as initiator and 15g water, mix supersonic emulsification, obtain emulsion system, in this emulsion system, the mass percent concentration of monomer styrene is 1.5%, the cross-linking agent divinylbenzene The mass percentage concentration is 4.4%, the mass percentage concentration of emulsifier sodium dodecylsulfonate is 2.9%, and the mass percentage concentration of initiator potassium persulfate ...

Embodiment 2

[0045] Embodiment 2, mass preparation Janus particles

[0046] Disperse 0.5 g of cross-linked polyacrylonitrile solid spherical particles with a diameter of 1 μm and a cross-linking degree of 50% in 15 g of water, and ultrasonically disperse them uniformly to obtain a seed solution with a concentration of 3.2% by mass; in addition, 0.25 g of monomeric benzene Ethylene (St), 0.75g crosslinking agent divinylbenzene (DVB), 0.5g emulsifier sodium dodecylsulfonate (SDS), 0.5g mass percent concentration is 1% potassium persulfate as initiator The aqueous solution of (KPS) and 15g water are mixed and ultrasonically emulsified to obtain an emulsion system. In this emulsion system, the mass percent concentration of monomer styrene is 1.5%, and the mass percent concentration of crosslinking agent divinylbenzene is 4.4%. , the mass percent concentration of emulsifier sodium dodecyl sulfonate is 2.9%, the mass percent concentration of initiator potassium persulfate is 0.03%; above-mention...

Embodiment 3

[0047] Embodiment 3, mass preparation Janus particles

[0048] Disperse 0.5g of crosslinked polymethyl methacrylate hollow spherical particles (shell thickness of 100nm) with a diameter of 400nm and a crosslinking degree of 50% in 15g of water, and ultrasonically disperse them uniformly to obtain seeds with a mass percentage concentration of 3.2%. Solution; In addition, with 0.25g monomer styrene (St), 0.75g crosslinking agent divinylbenzene (DVB), 0.5g emulsifier sodium dodecylsulfonate (SDS), 0.5g mass percent concentration is The aqueous solution of 1% potassium persulfate (KPS) as initiator and 15g water, mixing supersonic emulsification, obtain emulsion system, in this emulsion system, the mass percent concentration of monomer styrene is 1.5%, crosslinking agent divinyl The mass percent concentration of basebenzene is 4.4%, the mass percent concentration of emulsifier sodium dodecylsulfonate is 2.9%, and the mass percent concentration of initiator potassium persulfate is ...

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Abstract

The invention discloses a Janus particle with double properties and a preparation method thereof. By employing cross-linked polymer colloidal particles as seeds and through a seed emulsion polymerization method, Janus particles with double properties are obtained on the basis of a phase separation mechanism; inorganic, metal and metal oxide compounded Janus particles with electrical, magnetic, optical properties are obtained through functional group modification and composition of function materials and can be used for the material field. The Janus particles have an emulsifying property in organic, inorganic dispersed phases or different organic dispersed phases and meanwhile the Janus particles have a great application prospect in the aspects of self-assembly, superhydrophobicity, nanomotor and the like. The preparation method provided by the invention is easy to operate, has the feasibility of mass production and can adapt to different needs by modification and composition of function materials.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a class of Janus particles with dual properties and a preparation method thereof. Background technique [0002] Janus originally refers to the Roman double-faced god. Since the famous scientist de.Gennes used the word Janus to describe particles with dual properties in his Nobel speech in 1991 (P.G.De Gennes, Rev.Mod.Phys., 1992, 64,645-648), Janus particles have aroused great research interest. This is an interdisciplinary research field, involving many disciplines such as pharmacy, biochemistry, physics and colloid chemistry. It has great application prospects (A.Walther, M.Hoffmann and A.H.E.Müller, Angew.Chem., Int.Ed., 2008, 47, 711-714; J.Choi, Y.Zhao, D.Zhang, S.Chien and Y.H.Lo, Nano Lett., 2003, 3, 995-1000; T.Nisisako, T.Torii, T.Takahashi and Y.Takizawa, Adv.Mater., 2006, 18, 1152-1156; R.Golestanian, T.B. Liverpool and A. Ajdari, Phys. Rev. Lett., 2005, 94, 22080...

Claims

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Application Information

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IPC IPC(8): C08F265/08C08F265/04C08F2/24C08F8/00C08L51/00C08K3/08C08K3/00C08K3/36C08J7/12
Inventor 杨振忠唐琛张成亮
Owner INST OF CHEM CHINESE ACAD OF SCI
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