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Compound film enhanced by inclusion complex of ring molecule and polymer and preparation method thereof

A technology of cyclic molecules and polymers, applied in the field of layer-by-layer self-assembled supramolecular multilayer films, can solve the problems of interface incompatibility, weak interface adhesion, damage to the mechanical properties of bionic composite films, etc., and achieve strong specificity , stable structure, and easy phase separation of the substrate medium

Inactive Publication Date: 2009-06-24
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the inorganic particle layer and the organic layer often have the problem of interface incompatibility, the weak interfacial cohesion will greatly damage the mechanical properties of the biomimetic composite film (①Tang A.Kotov N A, Magonov S, Ozturk B Nature Mater.2003, 2, 413-418; ② Podsiadlo P et. Al. Science, 2007, 318, 80-83)

Method used

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  • Compound film enhanced by inclusion complex of ring molecule and polymer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Carboxy-terminated polyethylene glycol (molecular weight: 10,000) and chitosan (molecular weight: 800,000) were dissolved in water to form 9% and 0.1% solutions, and α-cyclodextrin was dissolved in water to form a 2% solution. At room temperature, first immerse the clean base mica sheet in the chitosan solution, take out the mica sheet after 20 minutes, and wash it twice in deionized water to remove excess chitosan molecules. At this time, a layer of almost monomolecular layer of chitosan molecules; then the mica sheet is immersed in the solution of carboxypolyethylene glycol, and after 20 minutes, the mica sheet is taken out and washed twice in deionized water to remove excess polyethylene glycol molecules. Alcohol molecules will be adsorbed on chitosan to form a polyethylene glycol layer; then the mica sheet is immersed in an aqueous solution of α-cyclodextrin, and washed twice in deionized water after 2 hours, because α-cyclodextrin will interact with Polyethylene gl...

Embodiment 2

[0032] Histone grafted with polypropylene glycol (molecular weight: 300,000) was dissolved in water to form a 0.5% solution, and β-cyclodextrin was dissolved in water to form a 1% solution. At room temperature, first immerse the clean cellulose acetate basement membrane in the polypropylene glycol-histone solution, take out the basement membrane after 20 minutes, and wash twice in deionized water to remove excess polypropylene glycol-histone, at this time, the basement membrane will adsorb A layer of polypropylene glycol-histone molecules; then immerse the basement membrane in β-cyclodextrin aqueous solution, and wash twice in deionized water after 2 hours, because β-cyclodextrin will bind with polypropylene glycol-histone molecules The polypropylene glycol graft chain produces selective inclusion, so the substrate will be discontinuously covered with a layer of inclusion, forming an inclusion layer, and an assembly cycle ends. When the above assembly is repeated, since histon...

Embodiment 3

[0034] Dissolve polyethylene glycol-polyvinylimide block copolymer (molecular weight: 20,000) and polyvinylpyridine (molecular weight: 5,000) respectively in dimethyl sulfoxide to make a 10% solution, α-cyclodextrin Dissolved in water to form a 3% solution. First immerse the clean silicon wafer in the polyvinylpyridine solution at 50°C, take out the silicon wafer after 20 minutes, wash twice in dimethyl sulfoxide to remove excess polyvinylpyridine, and at this time, a certain amount of polyvinylpyridine will be adsorbed on the silicon wafer. Layer polyethylene glycol-polyvinylimide molecules; then immerse the silicon wafer in the polyethylene glycol-polyvinylimide solution, take out the silicon wafer after 20 minutes, and wash twice in dimethyl sulfoxide Remove excess polyethylene glycol-polyvinylimide molecules, due to hydrogen bonding, a layer of polyethylene glycol-polyvinylimide molecules will be adsorbed on polyvinylpyridine; and then immerse the silicon wafer in α - In ...

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Abstract

The invention discloses a composite membrane reinforced by an inclusion complex of ring molecules and a polymer. The composite membrane is mainly formed by a polymer layer consisting of a linear polymer or a branch polymer and an inclusion complex layer formed by serially sleeving the ring molecules on partial chain links of the polymer which are compounded and accumulated layer by layer. The preparation of the composite membrane mainly comprises the following steps: a polymer component and a ring molecule component are dissolved into a solvent respectively to be prepared into a solution; and a substrate material is alternately immersed into the solution prepared by the polymer component and the ring molecule component, is kept stand for a period of time, and is taken out to remove excessive adhesive substances, and a multi-layer membrane system can be obtained by circulating the process. Compared with the prior art, a supermolecular multi-layer membrane greatly strengthens the mechanical property and the friction-resistant performance of the multi-layer membrane by introducing a self-assembling inclusion component of the polymer and the ring molecules, and has broad varieties of selectable polymers and broad application prospect.

Description

technical field [0001] The invention relates to the field of layer-by-layer self-assembled supramolecular multilayer films, in particular to a supramolecular multilayer film containing polymers and cyclic molecule host-guest inclusions and a preparation method thereof. Background technique [0002] In recent years, multilayer thin films formed by supramolecular self-assembly have attracted much attention. As a window for supramolecular science to move from the laboratory to the practical, the layer-by-layer self-assembly technology has unique advantages: (1) There is no requirement for the chemical structure and active functional groups on the surface of the material; (2) The construction process of the layered structure does not require Any external conditions, such as the provision of energy; (3) a wide range of molecules to assemble into membranes, which can be synthetic polyelectrolytes, or charged bioactive macromolecules such as proteins, polysaccharides, and DNA; (4) ...

Claims

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Application Information

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IPC IPC(8): B32B27/08C08J5/18
Inventor 张晟程从李帮经
Owner SICHUAN UNIV
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