Unlock instant, AI-driven research and patent intelligence for your innovation.

Full-supporting hydrogel 3D printing method based on constant rheological characteristic

A technology of 3D printing and rheological properties, applied in the field of 3D printing, can solve the problems of difficult printing and low precision of complex suspended structures, and achieve the effect of simple printing method, simple supporting structure and realizing safety.

Active Publication Date: 2019-08-09
HUAZHONG UNIV OF SCI & TECH
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a fully supported hydrogel 3D printing method based on iso-rheological properties, which uses sodium alginate and acrylamide double network hydrogel as printing materials to Calcium ion cross-linked sodium alginate hydrogel is used as the printing support. The printed hydrogel has a stable structure, and the method is easy to implement and easy to operate. It can continuously, stably and uniformly print complex suspended three-dimensional hydrogel models. This solves the technical problems of low precision and complex suspended structures that are not easy to print in the existing hydrogel 3D printing technology

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Full-supporting hydrogel 3D printing method based on constant rheological characteristic
  • Full-supporting hydrogel 3D printing method based on constant rheological characteristic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) Use the open source slicing software slic3r to slice the model, select the support angle as 0°, which is full support; set the offset position of the No. 2 extrusion head to the actual measured value of 60mm; use a dispenser with a diameter of 0.36 mm Supporting needles; start the 3D printing program to connect with the 3D printer, and load the model file to be printed.

[0055] (2) Add 2.88 ml of N,N'-methylenebisacrylamide (MBAA) with a concentration of 0.5 mg / mL and 8 microliters of tetramethylethylenediamine to 16.8 grams of deionized water, and then add 0.8 grams of seaweed Sodium bicarbonate solid powder, stir until completely dissolved, put it in a centrifuge for processing to remove air bubbles, and obtain solution A.

[0056] (3) Dissolve 2.4 g of acrylamide solid powder and 0.106 g of calcium sulfate dihydrate solid powder in 14.4 g of deionized water, add 0.8 ml of 5 mg / mL ammonium persulfate solution, stir until uniform, and obtain solution B.

[0057] ...

Embodiment 2

[0064] (1) Use the open source slicing software slic3r to slice the model, select the support angle as 0°, which is full support; set the offset position of the No. 2 extrusion head to the actual measured value of 60mm; use a dispenser with a diameter of 0.36 mm Supporting needles; start the 3D printing program to connect with the 3D printer, and load the model file to be printed.

[0065] (2) Add 1.44 ml of N,N'-methylenebisacrylamide (MBAA) with a concentration of 0.5 mg / mL and 8 microliters of tetramethylethylenediamine to 16.8 grams of deionized water, and then add 0.8 grams of seaweed Sodium bicarbonate solid powder, stir until completely dissolved, put it in a centrifuge for processing to remove air bubbles, and obtain solution A.

[0066] (3) Dissolve 2.4 g of acrylamide solid powder and 0.106 g of calcium sulfate dihydrate solid powder in 14.4 g of deionized water, add 0.8 ml of 5 mg / mL ammonium persulfate solution, stir until uniform, and obtain solution B.

[0067] ...

Embodiment 3

[0074] (1) Use the open source slicing software slic3r to slice the model, select the support angle as 0°, which is full support; set the offset position of the No. 2 extrusion head to the actual measured value of 60mm; use a dispenser with a diameter of 0.36 mm Supporting needles; start the 3D printing program to connect with the 3D printer, and load the model file to be printed.

[0075] (2) Add 4.32 ml of N,N'-methylenebisacrylamide (MBAA) with a concentration of 0.5 mg / mL and 8 microliters of tetramethylethylenediamine to 16.8 grams of deionized water, and then add 0.8 grams of seaweed Sodium bicarbonate solid powder, stir until completely dissolved, put it in a centrifuge for processing to remove air bubbles, and obtain solution A.

[0076] (3) Dissolve 2.4 g of acrylamide solid powder and 0.106 g of calcium sulfate dihydrate solid powder in 14.4 g of deionized water, add 0.8 ml of 5 mg / mL ammonium persulfate solution, stir until uniform, and obtain solution B.

[0077] ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
wavelengthaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of 3D printing, and particularly relates to a full-supporting hydrogel 3D printing method based on a constant rheological characteristic. According to thefull-supporting hydrogel 3D printing method based on the constant rheological characteristic, sodium alga acid and acrylamide double-network hydrogel are used as printing materials, and calcium ion-crosslinked sodium alga acid hydrogel is used as a printing support; and due to the fact that the supporting material and the printing raw materials have different degrees of crosslinking under the samecrosslinking condition and the supporting material is still kept in a viscoelastic fluid state after the printing raw materials are gelatinized, the supporting material is extruded to obtain hydrogel. The hydrogel obtained through printing is stable in structure, and the method is easy to implement; operation is easy, and complex suspended three-dimensional hydrogel models can be continuously, stably and uniformly printed; and the technical problems that according to an existing hydrogel 3D printing technique, the precision is low, and a complex suspended structure is difficult to print are solved.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and more specifically relates to a fully supported hydrogel 3D printing method based on iso-rheological properties. Background technique [0002] 3D printing technology is a kind of additive manufacturing technology, which can realize rapid prototyping. 3D printers are based on digital model files, through the combination of computer data models and rapid automatic prototyping systems, to achieve layer-by-layer bonding to manufacture three-dimensional objects. At this stage, 3D printing technology is developing rapidly and is widely used in various occasions. Due to its high water content and extracellular matrix-like characteristics, hydrogel is the preferred substrate for 3D bioprinting and artificial organ preparation, thus becoming a research hotspot in the fields of chemistry, materials and life medicine. [0003] However, due to the rheological properties of hydrogel and the difficulty...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/124B29C64/20B29C64/40B33Y30/00B33Y40/00B33Y70/00C08F251/00C08F222/38C08F220/56
CPCB29C64/124B29C64/20B29C64/40B33Y30/00B33Y40/00B33Y70/00C08F251/00C08F222/385
Inventor 臧剑锋周成羊佑舟化征
Owner HUAZHONG UNIV OF SCI & TECH