Folding Large Graphene-on-Polymer Films Yields Laminated Composites with Enhanced Mechanical Performance.

Citation data:

Advanced materials (Deerfield Beach, Fla.), ISSN: 1521-4095, Vol: 30, Issue: 35, Page: e1707449

Publication Year:
2018
Captures 10
Readers 10
Mentions 2
Blog Mentions 1
News Mentions 1
Social Media 4
Tweets 4
Repository URL:
http://scholarworks.unist.ac.kr/handle/201301/24414
PMID:
29992669
DOI:
10.1002/adma.201707449
Author(s):
Wang, Bin; Li, Zhancheng; Wang, Chunhui; Signetti, Stefano; Cunning, Benjamin V.; Wu, Xiaozhong; Huang, Yuan; Jiang, Yi; Shi, Haofei; Ryu, Seunghwa; Pugno, Nicola M.; Ruoff, Rodney S. Show More Hide
Publisher(s):
Wiley; WILEY-V C H VERLAG GMBH
Tags:
Materials Science; Engineering; composites; folding; graphene; mechanical reinforcement
Most Recent Tweet View All Tweets
Most Recent Blog Mention
Most Recent News Mention
article description
A folding technique is reported to incorporate large-area monolayer graphene films in polymer composites for mechanical reinforcement. Compared with the classic stacking method, the folding strategy results in further stiffening, strengthening, and toughening of the composite. By using a water-air-interface-facilitated procedure, an A5-size 400 nm thin polycarbonate (PC) film is folded in half 10 times to a ≈0.4 mm thick material (1024 layers). A large PC/graphene film is also folded by the same process, resulting in a composite with graphene distributed uniformly. A three-point bending test is performed to study the mechanical performance of the composites. With a low volume fraction of graphene (0.085%), the Young's modulus, strength, and toughness modulus are enhanced in the folded composite by an average of 73.5%, 73.2%, and 59.1%, respectively, versus the pristine stacked polymer films, or 40.2%, 38.5%, and 37.3% versus the folded polymer film, proving a remarkable mechanical reinforcement from the combined folding and reinforcement of graphene. These results are rationalized with combined theoretical and computational analyses, which also allow the synergistic behavior between the reinforcement and folding to be quantified. The folding approach could be extended/applied to other 2D nanomaterials to design and make macroscale laminated composites with enhanced mechanical properties.