Preparation of nano-composite hydrogel ink and application of nano-composite hydrogel ink in 3D printing

A nanocomposite and 3D printing technology, applied in the field of nanomaterials, can solve problems such as nozzle clogging

Active Publication Date: 2021-05-14
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the ink near the nozzle outlet tends to gel, which can easily cause nozzle clogging

Method used

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  • Preparation of nano-composite hydrogel ink and application of nano-composite hydrogel ink in 3D printing
  • Preparation of nano-composite hydrogel ink and application of nano-composite hydrogel ink in 3D printing
  • Preparation of nano-composite hydrogel ink and application of nano-composite hydrogel ink in 3D printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: the preparation of inorganic metal nanomaterial

[0028] Add 0.6mL of 0.2mol / L chloroauric acid and 49.4mL of deionized water into a 100mL round-bottomed flask, heat and stir the flask in an oil bath at 100°C for 10min, and mix well. Then quickly add 1mL sodium citrate solution with a mass fraction of 1%, continue to stir at 100°C to make the reaction fully complete, rinse with cold water to room temperature after 5min, and obtain inorganic metal nanomaterials with uniform particle shape.

Embodiment 2

[0030] 1. Surface modification of inorganic metal nanomaterials

[0031] The 50ppm inorganic metal nanomaterial prepared in Example 1 is mixed with 2-methyl-1-[4-methylmercaptophenyl]-2-morpholine acetone, wherein 2-methyl-1-[4-methylmercapto Phenyl]-2-morpholine acetone is added as a functional modifier, the mass of which is 0.1% of the mass of the inorganic metal nanomaterial dispersion liquid, and the modified inorganic metal nanomaterial is obtained by ultrasonication for 30 s at room temperature;

[0032] 2. Synthesis of 3D printed nanocomposite hydrogel inks

[0033] Add the hydrophilic monomer acrylamide to the modified inorganic metal nanomaterial obtained in step 1 of Example 2, dissolve it by ultrasonication for 40 s under the protection of nitrogen, and place it in a vacuum drying oven to remove dissolved oxygen in the solution ; Then place it in a UV light box for 40 minutes of polymerization reaction, and after it is cooled to room temperature, the 3D printing na...

Embodiment 3

[0036] 1. Draw 3D printing model slices

[0037] Use 3D max software to draw a 3D model, export the model and pour it into the slicing processing software, adjust the printing parameters, and export it in the .gocde file format to obtain 3D printed model slices;

[0038] 2. 3D printing of nanocomposite hydrogel ink

[0039] The printable nanocomposite hydrogel ink synthesized in Step 2 of Example 2 was transferred to a 30 ml syringe, and centrifuged at 4500 rpm for 5 min to remove air bubbles in the ink. Install the injection device in an improved 3D printing platform system, use a stepper motor to control the injection device, 3D printable nanocomposite hydrogel ink is extruded through a 25G needle, adjust the extrusion pressure and moving speed to make the ink uniform written on the substrate. The printing path is controlled by the G code file generated by the slicing software, and the movement speed and distance in the xyz direction of the 3D printer are controlled by the...

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PUM

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Abstract

The invention discloses preparation of nano-composite hydrogel ink and application of the nano-composite hydrogel ink in 3D printing. The preparation comprises the following steps: firstly, compounding a free radical initiator and an inorganic metal nano-material in a dynamic covalent bond mode to obtain a nano-composite; and then, in the presence of a polymerizable monomer, initiating a local rapid free radical polymerization reaction of the nano-composite to obtain the nano-composite hydrogel ink. The 3D printing of the ink is realized by taking dynamic coordination as a crosslinking mode and utilizing intermolecular chain and chain hydrogen bond interaction, and a 3D printing hydrogel model with self-repairing property, repeated recycling property, stretchability and excellent photo-thermal performance is prepared.

Description

technical field [0001] The invention relates to the preparation of a nanocomposite hydrogel ink and its application in 3D printing, belonging to the technical field of nanomaterials. Background technique [0002] Hydrogels typically consist of large amounts of water and a three-dimensional crosslinked polymer network. Due to the high elasticity and softness, biocompatibility, and multifunctionality of hydrogel, it has been applied in various fields, such as bioengineering, smart devices, soft robotics, and agriculture. Due to the influence of traditional manufacturing processes, hydrogels can only be made into two-dimensional or simple three-dimensional structures through templates. Therefore, the development of hydrogel patterning techniques from the microscale to the macroscale is crucial for the application of hydrogels, which has also caused a lot of research work. [0003] 3D printing technology is a new type of technology. It does not require molds or molds. It can q...

Claims

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Application Information

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IPC IPC(8): C09D11/107C09D11/03B33Y70/10
CPCC09D11/107C09D11/03B33Y70/10
Inventor 从怀萍郭秋艳秦海利
Owner HEFEI UNIV OF TECH
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