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Preparation method of carboxylated cellulose nanofiber hydrogel

A carboxylated cellulose and nanofiber technology, applied in electrophoretic plating, coating, electrolytic coating, etc., can solve the problems of poor electrical conductivity, achieve high porosity and moisture content, simple and fast preparation process, and excellent reaction conditions mild effect

Inactive Publication Date: 2020-03-24
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The use of electrodeposition to prepare hydrogels has been used in the prior art. In the Chinese patent with the application number 201610767359.0 and the name "An Electrodeposition Method for Carboxymethyl Cellulose", it is proposed to prepare carboxymethyl cellulose by electrodeposition. The hydrogel of methylcellulose, but in the deposition process of this method, carboxymethylcellulose is deposited on the electrode from the solution, gradually covers the electrode, and the conductivity gradually deteriorates. The thickness of the final formed hydrogel is thin and microscopic The structure is a uniform membrane structure

Method used

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  • Preparation method of carboxylated cellulose nanofiber hydrogel
  • Preparation method of carboxylated cellulose nanofiber hydrogel
  • Preparation method of carboxylated cellulose nanofiber hydrogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Step 1): prepare a carboxylated cellulose nanofiber suspension with a mass percentage concentration of 0.25%, for use;

[0045] Step 2): prepare a stainless steel needle with a diameter of 1.5 mm as the anode material and a platinum wire with a diameter of 0.5 mm as the cathode material, which are used as the anode and cathode of electrophoretic deposition respectively;

[0046] Step 3): Immerse the anode material and the cathode metal material into the carboxylated cellulose nanofiber suspension, the insertion depth is 6mm, the spacing is 20mm, a constant current direct current is applied, the current value is 0.25mA, and the nanofiber is carried out. electrophoretic deposition, the deposition time is 120min;

[0047] Step 4): After the deposition, the carboxylated cellulose nanofiber hydrogel was obtained on the stainless steel needle anode.

[0048] The carboxylated cellulose nanofibrous hydrogels obtained on the anode can reach a diameter of 1.2 cm (see Figure 2-...

Embodiment 2

[0050] Step 1): prepare a carboxylated cellulose nanofiber suspension with a mass percentage concentration of 0.25%, for use;

[0051] Step 2): prepare an iron wire with a diameter of 1.5 mm and a purity of 99.99% as the anode material and a platinum wire with a diameter of 0.5 mm as the cathode material, which are used as the anode and cathode for electrophoretic deposition, respectively;

[0052] Step 3): Immerse the anode material and the cathode metal material into the carboxylated cellulose nanofiber suspension, the insertion depth is 10mm, the spacing is 20mm, a constant current direct current is applied, the current value is 0.25mA, and the carboxylation is carried out. Electrophoretic deposition of cellulose nanofibers with a deposition time of 120 min;

[0053] Step 4): After the deposition, the carboxylated cellulose nanofiber hydrogel is obtained on the iron wire anode.

[0054] The carboxylated cellulose nanofiber hydrogel obtained on the anode is a carboxylated c...

Embodiment 3

[0056] Step 1): prepare a carboxylated cellulose nanofiber suspension with a mass percentage concentration of 0.1%, for later use;

[0057] Step 2): prepare a copper sheet with a size of 20mm×50mm×0.2mm and a purity of 99.99% as the anode material and a platinum sheet with a size of 15mm×20mm×0.1mm as the cathode material, respectively as the anode and cathode of electrophoretic deposition;

[0058] Step 3): Immerse the anode material and the cathode metal material into the carboxylated cellulose nanofiber suspension, the insertion depth is 15mm, the spacing is 15mm, a constant current direct current is applied, the current value is 1.0mA, and the carboxylation is carried out Electrophoretic deposition of cellulose nanofibers with a deposition time of 60 min;

[0059] Step 4): After the deposition, the carboxylated cellulose nanofiber hydrogel is obtained on the copper sheet anode.

[0060] The carboxylated cellulose nanofiber hydrogel obtained on the anode is a carboxylated ...

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Abstract

The invention relates to a preparation method of carboxylated cellulose nanofiber hydrogel. The preparation method is characterized by comprising the following steps that: 1) carboxylated cellulose nanofiber turbid liquid is prepared for later use; 2) an anode material and a cathode material are prepared and are respectively used as an anode and a cathode for electrophoretic deposition; 3) the anode material and the cathode metal material are immersed into the carboxylated cellulose nanofiber turbid liquid, and direct current is applied so as to perform the electrophoretic deposition of carboxylated cellulose nanofibers; and 4) after the deposition is finished, the carboxylated cellulose nanofiber hydrogel is obtained on the anode. According to the preparation method, the electrophoretic deposition is conducted through the carboxylated cellulose nanofiber turbid liquid, so that a thicker hydrogel product of a nanofiber-shaped three-dimensional network structure is obtained.

Description

technical field [0001] The invention belongs to the field of electrochemistry of polymer materials, and in particular relates to a preparation method of a carboxylated cellulose nanofiber hydrogel. Background technique [0002] The preparation of hydrogels by electrodeposition has been applied in the prior art. In the Chinese patent with the application number of 201610767359.0, titled "An Electrodeposition Method for Carboxymethyl Cellulose", it is proposed to prepare carboxymethyl cellulose by electrodeposition. The hydrogel of methyl cellulose, but in the deposition process of this method, carboxymethyl cellulose is deposited on the electrode from the solution, gradually covering the electrode, the conductivity gradually deteriorates, and the finally formed hydrogel is thin and microscopic. The structure is a uniform membranous structure. The unique 3D nano-network structure of nanomaterials can endow materials with more and wider applications. SUMMARY OF THE INVENTION...

Claims

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Application Information

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IPC IPC(8): C25D13/06C08J3/075C08L1/28
CPCC08J3/075C08J2301/28C25D13/04
Inventor 施晓文郭晓嘉高慧敏邓红兵杜予民
Owner WUHAN UNIV
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