DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Additive manufacturing of strong silica sand structures enabled by polyethyleneimine binder

Journal Article · · Nature Communications

Abstract Binder Jet Additive Manufacturing (BJAM) is a versatile AM technique that can form parts from a variety of powdered materials including metals, ceramics, and polymers. BJAM utilizes inkjet printing to selectively bind these powder particles together to form complex geometries. Adoption of BJAM has been limited due to its inability to form strong green parts using conventional binders. We report the discovery of a versatile polyethyleneimine (PEI) binder for silica sand that doubled the flexural strength of parts to 6.28 MPa compared with that of the conventional binder, making it stronger than unreinforced concrete (~4.5 MPa) in flexural loading. Furthermore, we demonstrate that PEI in the printed parts can be reacted with ethyl cyanoacrylate through a secondary infiltration, resulting in an increase in flexural strength to 52.7 MPa. The strong printed parts coupled with the ability for sacrificial washout presents potential to revolutionize AM in various applications including construction and tooling.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1902531
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 12; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United Kingdom
Language:
English

References (31)

Hydrogen-bonded supramolecular polymer networks journal October 1999
Production of injection molding tooling with conformal cooling channels using the three dimensional printing process journal May 2000
Influence of branching architecture on polymer properties journal July 2011
Plaster casting process for prototyping of die casting based on rapid tooling journal July 2006
Particle-bed 3D printing in concrete construction – Possibilities and challenges journal October 2018
Vision of 3D printing with concrete — Technical, economic and environmental potentials journal October 2018
Manufacturing of a composite wing with internal structure in one cure cycle journal December 2018
Structural investigation on water-induced phase transitions of poly(ethylene imine), Part IV: Changes of intra- and intermolecular hydrogen bonds in the hydration processes as revealed by time-resolved Raman spectral measurements journal December 2007
Hydrogen-Bond-Driven Chemical Separations: Elucidating the Interfacial Steps of Self-Assembly in Solvent Extraction journal June 2020
Effect of Nanoscale Geometry on Molecular Conformation:  Vibrational Sum-Frequency Generation of Alkanethiols on Gold Nanoparticles journal November 2006
Insight into the Mechanisms Driving the Self-Assembly of Functional Interfaces: Moving from Lipids to Charged Amphiphilic Oligomers journal December 2019
Oxidation of primary, secondary, and tertiary amines with neutral permanganate. Simple method for degrading amines to aldehydes and ketones journal October 1967
Effects of Relative Humidity on the Surface and Bulk Structures of Linear Polyethylenimine Thin Films journal July 2014
Structural Investigation on Water-Induced Phase Transitions of Poly(ethylene imine). 1. Time-Resolved Infrared Spectral Measurements in the Hydration Process journal April 2002
Significant Structure Change in Nonequimolar Complexes of Poly(ethylenimine) and Octadecanoic Acid Induced by Polymer Backbone Branching journal August 2006
Comprehensive NMR Studies of the Structures and Properties of PEI Polymers journal August 2013
Correlation of Structure Changes in the Water-Induced Phase Transitions of Poly(ethylenimine) Viewed from Molecular, Crystal, and Higher-Order Levels As Studied by Simultaneous WAXD/SAXS/Raman Measurements journal December 2009
Nomenclature of Silica journal July 1961
Additively manufactured hierarchical stainless steels with high strength and ductility journal October 2017
Three-dimensional printing of piezoelectric materials with designed anisotropy and directional response journal January 2019
Three-dimensional printing of multicomponent glasses using phase-separating resins journal November 2019
Monolithic digital patterning of polydimethylsiloxane with successive laser pyrolysis journal August 2020
Chemistry from 3D printed objects journal April 2019
Additive manufacturing of silica aerogels journal August 2020
Carbonated rankinite binder: effect of curing parameters on microstructure, strength development and durability performance journal September 2020
Rapid three-dimensional structuring of transparent SiO2 glass using interparticle photo-cross-linkable suspensions journal May 2020
A new approach to vibrational sum frequency generation spectroscopy using near infrared pulse shaping journal March 2019
Additive Manufacturing of Structural Cores and Washout Tooling for Autoclave Curing of Hybrid Composite Structures journal July 2018
Stimuli-Responsive Guest Binding and Releasing by Dendritic Polymer-Based Hydrogels journal June 2008
Flexible approach to vibrational sum-frequency generation using shaped near-infrared light journal January 2018
An Experimental Study on Mechanical Properties of Rocks journal January 1970