System and method for four-dimensional printing of elastomer-derived ceramic structures by self-forming method

Patent metadata

Field	Value
Publication number	US-11065781-B2
Application number	US-201816006924-A
Country	US
Kind code	B2
Filing date	Jun 13, 2018
Priority date	Jun 13, 2018
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

A system and method of constructing a 4D-printed ceramic object, the method including extruding inks including particles and polymeric patterns through a nozzle to deposit the inks to form a first elastic structure, subjecting the first elastic structure to tensile stress along at least one axis, extruding inks including particles and polymeric patterns through a nozzle to deposit the inks to form a second elastic structure provided to the first elastic structure under tensile stress, releasing the application of tensile stress from the first elastic structure to allow the first elastic structure and second elastic structure to form a 4D-printed elastomeric object, and converting the 4D-printed elastomeric object into the 4D-printed ceramic object.

First claim

The invention claimed is:

1. A method of constructing a 4D-printed ceramic object, the method comprising the steps of:
extruding inks including particles and polymeric ceramic precursors through a nozzle to deposit the inks to form a first elastic structure,
subjecting the first elastic structure to tensile stress along at least one axis,
extruding inks including particles and polymeric ceramic precursors through a nozzle to deposit the inks to form a second elastic structure provided to the first elastic structure under tensile stress,
releasing the application of tensile stress from the first elastic structure to allow the first elastic structure and second elastic structure to form a 4D-printed elastomeric object, and
converting the 4D-printed elastomeric object into the 4D-printed ceramic object.

2. A method of constructing a 4D-printed ceramic object in accordance with claim 1 , wherein the second elastic structure includes at least one area of higher relative bending stiffness or uniform bending stiffness.

3. A method of constructing a 4D-printed ceramic object in accordance with claim 2 , wherein the release of the first elastic structure from the tensile stress further includes the generation of a relative compressive stress to the second elastic structure which deforms the second elastic structure.

4. A method of constructing a 4D-printed ceramic object in accordance with claim 2 , wherein the at least one area of higher relative bending stiffness or uniform bending stiffness is arranged in a pattern.

5. A method of constructing a 4D-printed ceramic object in accordance with claim 1 , wherein the first elastic structure is a planar substrate.

6. A method of constructing a 4D-printed ceramic object in accordance with claim 1 , wherein the tensile stress is provided by attaching the first elastic structure to a stretching means.

7. A method of constructing a 4D-printed ceramic object in accordance with claim 6 , wherein the stretching means is a biaxial stretching device.

8. A method of constructing a 4D-printed ceramic object in accordance with claim 1 , wherein the particles are zirconium dioxide nanoparticles.

9. A method of constructing a 4D-printed ceramic object in accordance with claim 8 , wherein the polymeric ceramic precursors are Poly(DiMethylSiloxane).

10. A method of constructing a 4D-printed ceramic object in accordance with claim 1 , wherein the inks are formed from a homogenous distribution of the particles in the polymeric ceramic precursors and wherein the weight percentage of the particles in the inks is in the range of from about 1% to about 90% and the weight percentage of the polymeric ceramic precursors in the inks is in the range of from about 10% to about 99%.

11. A method of constructing a 4D-printed ceramic object in accordance with claim 1 , wherein the step of converting the 4D-printed elastomeric object into the 4D-printed ceramic object further includes subjecting the 4D-printed elastomeric object to pyrolysis in the presence of an inert gas.

12. A method of constructing a 4D-printed ceramic object in accordance with claim 11 , wherein the inert gas is argon.

13. A method of constructing a 4D-printed ceramic object in accordance with claim 1 , wherein the converting the 4D-printed elastomeric object into the 4D-printed ceramic object further includes subjecting the 4D-printed elastomeric object to pyrolysis whilst contained in a vacuum.

14. A method of constructing a 4D-printed ceramic object in accordance with claim 1 , wherein the converting the 4D-printed elastomeric object into the 4D-printed ceramic object further includes subjecting the 4D-printed elastomeric object to further heat treatment in air after heat treatment in a vacuum or under an inert atmosphere.

Assignees

• Univ City Hong Kong

Inventors

• Lu Jian
• Liu Guo
• Zhao Yan

Classifications

• B33Y70/00

  Materials specially adapted for additive manufacturing · CPC title

• B28B11/243

  Setting, e.g. drying, dehydrating or firing ceramic articles (B28B11/242 takes precedence) · CPC title

• C04B35/053

  Fine ceramics · CPC title

• C04B35/453

  based on zinc, tin, or bismuth oxides or solid solutions thereof with other oxides, e.g. zincates, stannates or bismuthates · CPC title

• C04B35/117

  Composites · CPC title