Method and product for establishing conductive hydrogel ultrathin membrane by using layered assembly and electrochemical technology

A technology of conductive hydrogel and electrochemical technology, which is applied in the field of preparation of conductive hydrogel ultra-thin films, can solve problems such as application limitations, and achieve good biocompatibility, excellent biocompatibility, uniform distribution and variable content. control effect

Active Publication Date: 2014-01-29
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrogel usually has a large physical scale, and its application in the fields of biomedical materials and fine medical devices is greatly limited (Guiseppi-ElieA. Electroconductive hydrogels: synt

Method used

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  • Method and product for establishing conductive hydrogel ultrathin membrane by using layered assembly and electrochemical technology
  • Method and product for establishing conductive hydrogel ultrathin membrane by using layered assembly and electrochemical technology
  • Method and product for establishing conductive hydrogel ultrathin membrane by using layered assembly and electrochemical technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Prepare a sodium chloride buffer solution with a molar concentration of 0.15M;

[0035] Prepare a polylysine (PLL) solution with a mass concentration of 0.5 mg / mL in a buffer solution, and stir until the PLL is fully dissolved;

[0036] Prepare a hyaluronic acid (HA) solution with a mass concentration of 1 mg / mL in a buffer solution, and stir until the HA is fully dissolved;

[0037] (2) Soak the electrode in the PLL solution for 8 minutes, and then wash it with the buffer solution in step (1) for 3 times; then soak it in the HA solution for 8 minutes, and then wash it with the buffer solution in step (1) 3 times (step (2) constitutes the preparation of a double layer);

[0038] (3) Prepare a mixed solution of pyrrole with a mole fraction of 50mM and 10mM sodium p-toluenesulfonate in a buffer solution, and stir until the pyrrole and sodium p-toluenesulfonate are fully dissolved;

[0039] (4) Repeat the process of (2) 16 times to prepare (PLL / HA) coated 16 The ele...

Embodiment 2～5

[0042] The same preparation method as in Example 1 was adopted, except that the polymerization reaction time in step (5) was different, and the polymerization reaction time in Examples 2-5 were 200 s, 300 s, 400 s and 500 s, respectively.

[0043] figure 1 It is the cyclic voltammetry curve (scanning speed is 50mV / s) of the conductive hydrogel ultra-thin films prepared respectively in Examples 1-5, in the figure, observe figure 1It can be found that the cyclic voltammetry current is proportional to the electropolymerization time, and the conductivity of the conductive hydrogel ultrathin film gradually increases with the increase of the electrification time.

[0044] figure 2 It is the Nyquist impedance curve of the conductive hydrogel ultrathin films prepared respectively in Examples 1-4. Observed figure 2 It can be found that the Nyquist radius in the high-frequency region decreases with the increase of electropolymerization time, indicating that the electron transfer in...

Embodiment 6

[0050] (1)~(4) Perform 5 steps (1)~(4) in the same example;

[0051] (5) Put the electrode soaked in step (4) into the electrochemical cell containing the solution in step (3), and connect the saturated potassium chloride electrode, platinum sheet and conductive electrode to the reference electrode of CHI660DE electrochemical workstation. On the interface of the specific electrode, counter electrode, and working electrode; in the chronopotentiometry on the electrochemical workstation, set the current parameter to 0.05mA, limit the maximum initial voltage to 1V, stop the reaction for 120s after energizing for 50s, and stop the reaction for 120s after energizing again for 50s Stop the reaction for 240s, and stop the reaction after energizing again for 50s to obtain a conductive hydrogel ultra-thin film containing a certain amount of polypyrrole, which is stored in a buffer solution.

[0052] According to the Sauerbrey formula,

[0053] In the formula, △F is the change of the ...

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Abstract

The invention discloses a method for establishing a controllable conductive hydrogel ultrathin membrane by using layered assembly and an electrochemical technology. The method comprises the following steps of alternately performing layer-by-layer self-assembly on a conductive substrate in polycation and polyanion electrolyte solution to obtain a conductive substrate with a hydrogel ultrathin membrane; mixing pyrrole, sodium p-tolue and solvent E to obtain solvent G, placing the conductive substrate with the hydrogel ultrathin membrane in the solvent G, and soaking the conductive substrate until the concentrations of the pyrrole and the sodium p-tolue on the inside and the outside of the hydrogel ultrathin membrane are balanced; and performing electrical oxidation polymerization on the pyrrole in the environment of the solution G by using a chronopotentiometry after soaking to obtain the conductive hydrogel ultrathin membrane. The invention also discloses a conductive hydrogel ultrathin membrane prepared by the method for establishing the controllable conductive hydrogel ultrathin membrane by using the layered assembly and the electrochemical technology. The layered assembly and the electrochemical technology used together, and the electrical performance of the conductive hydrogel ultrathin membrane can be accurately regulated and controlled by changing the time of electrochemical reaction.

Description

technical field [0001] The invention relates to the preparation of a conductive hydrogel ultra-thin film, in particular to a method and product for constructing a conductive hydrogel ultra-thin film by using layered assembly and electrochemical technology. Background technique [0002] Conductive hydrogels have attracted extensive attention due to their unique physical, electrochemical and optical properties. However, the hydrogel usually has a large physical scale, and its application in the fields of biomedical materials and fine medical devices is greatly limited (Guiseppi-ElieA. Electroconductive hydrogels: synthesis, characterization and biomedical applications. Biomaterials, 2010, 31 (10): 2701-2716.), so the construction of conductive hydrogel ultrathin films with micro-nano scale has important research significance. [0003] Layer-by-layer self-assembly technology can form a multilayer film by physically or chemically interacting two or more components. Since Deche...

Claims

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Application Information

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IPC IPC(8): H01B13/00H01B5/14
Inventor 计剑任科峰赵义秀
Owner ZHEJIANG UNIV
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