Preparation method of cellulose conducting hydrogel for 3D printing

A conductive hydrogel, 3D printing technology, applied in the direction of additive processing, etc., can solve the problems of limiting the practical application of hydrogels, unable to manufacture complex structures, etc., achieving good thermal reversible mechanical properties, good freeze resistance, gelatin fast effect

Inactive Publication Date: 2019-06-28
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of research, the wide application of gel in many fields has gradually increased the demand for customization of the external shape and internal structure of the gel. However, the traditional gel forming mainly relies on molds and cannot manufacture complex structures. These shortcomings seriously limit Practical Applications of Hydrogels

Method used

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  • Preparation method of cellulose conducting hydrogel for 3D printing
  • Preparation method of cellulose conducting hydrogel for 3D printing
  • Preparation method of cellulose conducting hydrogel for 3D printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Accurately weigh 10.21g of ZnCl 2 and 0.35gCaCl 2 Dissolve in 4g of deionized water, add 0.2g of cotton linters after centrifugation, and dissolve with magnetic stirring at 75°C for 30 minutes until completely dissolved to obtain a cellulose solution;

[0030] (2) Add 2.5 g of water to the cellulose solution obtained in step (1), and stir evenly at 75°C through magnetic force;

[0031] (3) The cellulose solution obtained in step (2) is ultrasonically debubbled at 90° C., and then the cellulose solution is cooled and gelled at room temperature to obtain a cellulose hydrogel that can be used for 3D printing;

[0032] (4) The slicing software of the 3D printing system uses the UltimakerCura3.4.1 instruction software to divide the graphics, set the printing parameters, and export the printing model. The 3D X-Y-Z movable 304 stainless steel control nozzle is installed in the printing equipment, the temperature of the barrel is adjusted to 69°C, the diameter of the nozz...

Embodiment 2

[0035] (1) Accurately weigh 9.5g of ZnCl 2 and 0.25gCaCl 2 Dissolve in 3.5g of deionized water, add 0.18g of cotton linters after centrifugation, and dissolve with magnetic stirring at 75°C for 30 minutes until completely dissolved to obtain a cellulose solution;

[0036] (2) Add 0.8 g of glycerol to the cellulose solution obtained in step (1), and stir evenly at 75° C. by magnetic force;

[0037] (3) The cellulose solution obtained in step (2) is ultrasonically debubbled at 80° C., and then the cellulose solution is cooled and gelled at room temperature to obtain a cellulose hydrogel that can be used for 3D printing;

[0038] (4) With embodiment 1 step (4).

[0039] Using the method of this embodiment, the gel time is 25-30s. Put the cellulose hydrogel in a water bath at 75°C and heat it at a constant temperature for 5 minutes to 10 minutes to return to the state of the sol.

Embodiment 3

[0041] (1) Accurately weigh 10.21g of ZnCl 2 and 0.33gCaCl 2 Dissolve in 3.63g of deionized water, add 0.3g of cotton linters after centrifugation, and dissolve with magnetic stirring at 75°C for 40 minutes until completely dissolved to obtain a cellulose solution;

[0042] (2) Add 3 g of water to the cellulose solution obtained in step (1), and stir evenly at 75° C. by magnetic force;

[0043] (3) Put the cellulose solution obtained in step (2) at a constant temperature of 90° C. for defoaming, and then cool the cellulose solution to gel at room temperature to obtain a cellulose hydrogel that can be used for 3D printing;

[0044] (4) With embodiment 1 step (4).

[0045] Using the method of this embodiment, the gel time is 8s. Put the cellulose hydrogel in a water bath at 85°C and heat it at a constant temperature for 5 minutes to 10 minutes to return to the state of the sol. ,

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Abstract

The invention discloses a preparation method of a cellulose conducting hydrogel for 3D printing. The preparation method comprises the following steps: preparing a mixed solution of ZnCl2 and CaCl2, adding cellulose, and stirring the mixture magnetically to 50-90 DEG C to dissolve the mixture for 10-90 min to be fully dissolved to obtain a cellulose solution; adding water or small molecular alcoholinto the cellulose solution, and stirring the mixture at 50-90 DEG C for 5-30 min till being uniform; and debubbling and cooling the mixture to obtain the cellulose conducting hydrogel. The celluloseconducting hydrogel has the advantages of being high in gelation rate, good in freezing resistance, good in thermal reversible mechanical property, high in transparency, high in conducting property and the like. The mechanical property of the cellulose conducting hydrogel prepared by the method at 20 DEG C below zero is equivalent to that at 25 DEG C, and the cellulose hydrogel at 60 DEG C belowzero is not frozen, too.

Description

technical field [0001] The invention belongs to the technical field of cellulose hydrogel, and in particular relates to a preparation method of cellulose conductive hydrogel which can be used for 3D printing. Background technique [0002] As a renewable biomass resource, cellulose is the most widely distributed and abundant natural polymer product in nature. It has the characteristics of good biocompatibility, biodegradability, low toxicity and stable physical and chemical properties. An important raw material for the development of new energy and new materials. [0003] Cellulose hydrogel is a cellulose hydrogel material obtained by sol-gel processing of cellulose molecules. Due to its low cost, wide range of sources, its own excellent biological advantages and good mechanical strength and toughness, cellulose hydrogel materials have been widely used, mainly including adsorption materials, water-retaining materials, conductive materials, catalysts and other materials. Pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L1/02C08K3/16B33Y70/00
Inventor 何明郭可纯侯婷姚建峰
Owner NANJING FORESTRY UNIV
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