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Title: Engineering Graphene-Ceramic 3D Composite Foams by Freeze Drying

Journal Article · · Advanced Engineering Materials

A 3D graphene foam produced by the chemical vapor deposition (CVD) technique is recognized as an effective nanofiller material, as it does not agglomerate in the matrix. Though CVD facilitates pristine graphene foam production, the method poses limitations in developing large-scale 3D graphene composite foams as advanced engineering materials. Herein, a freeze-drying (FD) process is used to produce a composite 3D foam, which is a mixture of graphene nanoplatelet (GNP) and a low-temperature co-fired ceramic (LTCC). The freeze-dried GNP-LTCC reticulated 3D composite foam has an average pore size ranging from 70 to 100 μm. Pore size is varied by regulating the heat transfer rate during the freezing process using a thermally conductive aluminum (Al) mold and a thermally insulating acrylonitrile butadiene styrene (ABS) mold. Computational thermal modeling is used to visualize the heat transfer and its effect on foam pore size. Subsequently, a freeze-dried GNP-LTCC composite foam is embedded into the LTCC matrix to form a hierarchical assembly by a spark plasma technique without compromising the 3D structure of the FD foam. This study established that a simple, eco-friendly, and scalable processing methodology can produce advanced graphene-based 3D composite foams as the future tailorable nanofillers for designing multimatrix materials.

Research Organization:
Univ. of Texas at El Paso, TX (United States); Florida International Univ. (FIU), Miami, FL (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
NA0003865
OSTI ID:
1958031
Alternate ID(s):
OSTI ID: 1779949; OSTI ID: 1958095
Journal Information:
Advanced Engineering Materials, Vol. 23, Issue 7; ISSN 1438-1656
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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