4D-Printed Ceramic Origami via Elastomeric Precursor Folding

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current 3D printing technologies face challenges in creating complex ceramic structures with mixed Gaussian curvature and high mechanical robustness, as silicone resins become inflexible after full crosslinking, limiting the ability to form sophisticated, transformable objects.

Innovation Solution

A method involving the extrusion of inks containing polymeric ceramic precursors and particles, followed by folding and pyrolysis to convert 3D-printed elastomeric objects into 4D-printed ceramic objects with mixed Gaussian curvature, using techniques like Direct Ink Writing and synchronous thermal crosslinking, and incorporating zirconium dioxide nanoparticles in a poly(dimethylsiloxane) matrix for enhanced flexibility and structural integrity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If silicone resins are fully crosslinked to achieve structural integrity, then mechanical strength is improved, but flexibility and ability to be curved are lost

Engineering Contradiction:

Improvemechanical strengthVSAvoidflexibility

Core Design Contradiction:

StrengthVSAdaptability or versatility

Solution Approach 1:

The patent changes the material parameter from fully crosslinked silicone resin to partially crosslinked or uncured polymeric ceramic precursor, which maintains flexibility while enabling subsequent ceramic transformation. This parameter change allows the material to be curved and folded during 4D printing while still achieving structural integrity after pyrolysis

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses composite materials by combining polymeric ceramic precursors with ceramic particles (such as zirconium dioxide nanoparticles). This composite approach provides both the flexibility needed for folding during printing and the structural integrity required for the final ceramic structure, resolving the contradiction between flexibility and strength

Inventive Principle:

Principle #40Composite materials

2Ease of manufacture

If conventional 3D printing is used to create complex ceramic structures, then manufacturing capability is improved, but ability to create mixed Gaussian curvature and transformable objects is limited

Engineering Contradiction:

Improvemanufacturing capabilityVSAvoidtransformability

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent introduces dynamics by using elastomeric polymeric ceramic precursors that can deform and transform after printing. The printed structures are not static but can undergo shape changes, folding, and transformation in response to external stimuli, enabling 4D printing of transformable ceramic objects that conventional 3D printing cannot achieve

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent applies parameter changes by transforming the material state from elastomeric precursor to rigid ceramic through pyrolysis. This parameter change enables the structure to transition from a flexible, printable state to a rigid, functional ceramic state, creating objects with mixed Gaussian curvature that maintain structural integrity

Inventive Principle:

Principle #35Parameter changes

3Strength

If ceramic particles are added to polymeric precursors to enhance structural integrity, then mechanical robustness is improved, but processing flexibility may be reduced

Engineering Contradiction:

Improvemechanical robustnessVSAvoidprocessing flexibility

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The patent applies local quality by using ceramic particles with specific properties (such as zirconium dioxide nanoparticles with controlled size and shape) distributed within the polymeric matrix. This localized enhancement of structural integrity at the particle level maintains overall processing flexibility of the composite material, allowing both structural robustness and manufacturing ease

Inventive Principle:

Principle #3Local quality

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach enables the creation of 4D-printed ceramic objects with high mechanical robustness and complex geometries, achieving compressive strengths up to 211 MPa, overcoming limitations in shape retention and flexibility of conventional ceramic foams, and demonstrating scalability and cost-effectiveness.

Implementation Method 1

synchronous thermal crosslinking

Methodology Applied

Scientific EffectThermal crosslinking:

Implementation Method 2

converting the 4D-printed elastomeric object into the 4D-printed ceramic object... the polymer-to-ceramic transformation occurs via pyrolysis

Methodology Applied

Scientific EffectPyrolysis: Pyrolysis

Implementation Method 3

the elastic recovery of the elastomeric object enables folding into complex structures

Methodology Applied

Scientific EffectElastic recovery: Elasticity

Data Source

PatentUS10377076B2System and method for four-dimensional printing of ceramic origami structures

Publication Date: 2019.08.13 CITY UNIVERSITY OF HONG KONG

AI summary

A system and method of constructing a 4D-printed ceramic object includes extruding inks including particles and polymeric ceramic precursors through a nozzle to deposit the inks on a heating plate, whereby a 3D-printed elastomeric object is formed on the heating plate, folding the 3D-printed elastomeric object into a complex structure to form a 4D-printed pre-strained elastomeric object, and converting the 4D-printed elastomeric object into the 4D-printed ceramic object.