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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1:

[0030] The carboxyl-terminated polyethylene glycol (molecular weight 10,000) and chitosan (molecular weight 800,000) were dissolved in water to form 9% and 0.1% solutions, respectively, and α-cyclodextrin was dissolved in water to form 2% solutions. Firstly, immerse the clean basement mica flakes in the chitosan solution at room temperature, take out the mica flakes after 20 minutes, and wash twice in deionized water to remove excess chitosan molecules. At this time, a layer of nearly monomolecular molecules will be adsorbed on the basement mica flakes. Layer of chitosan molecules; then immerse the mica flakes in the carboxypolyethylene glycol solution, take out the mica flakes after 20 minutes and wash twice in deionized water to remove excess polyethylene glycol molecules. Alcohol molecules will be adsorbed on the chitosan to form a polyethylene glycol layer; then the mica flakes will be immersed in an aqueous solution of α-cyclodextrin, and washed twice in d...

Example Embodiment

[0031] Example 2:

[0032] Polypropylene glycol grafted histone (molecular weight 300,000) was dissolved in water to make a 0.5% solution, and β-cyclodextrin was dissolved in water to make a 1% solution. Firstly, immerse the clean cellulose acetate basement membrane in polypropylene glycol-histone solution at room temperature. 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 be adsorbed. A layer of polypropylene glycol-histone molecules; then the basement membrane is immersed in β-cyclodextrin aqueous solution, and washed twice in deionized water after 2 hours. Because β-cyclodextrin will interact with polypropylene glycol-histone molecules on the The polypropylene glycol graft chain produces selective inclusions, so the substrate will be discontinuously covered with a layer of inclusions to form a layer of inclusions, and an assembly cycle ends. When repeating ...

Example Embodiment

[0033] Example 3:

[0034] Polyethylene glycol-polyvinyl imide block copolymer (molecular weight 20,000) and polyvinyl pyridine (molecular weight 5,000) were dissolved in dimethyl sulfoxide to form a 10% solution, α-cyclodextrin Dissolve in water to make a 3% solution. First immerse the clean silicon wafer in the polyvinylpyridine solution at 50℃, take out the silicon wafer after 20 minutes, and wash it in dimethyl sulfoxide twice to remove excess polyvinylpyridine. At this time, the silicon wafer will adsorb one 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 the hydrogen bond, a layer of polyethylene glycol-polyvinylimide molecules will be adsorbed on the polyvinylpyridine; then the silicon wafer is immersed in α -In the cyclodextrin aqueous solut...

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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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