Volume 133, Issue 9 pp. 4944-4950
Forschungsartikel

Unexpected Elasticity in Assemblies of Glassy Supra-Nanoparticle Clusters

Jia-Fu Yin

Jia-Fu Yin

South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China

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Zhao Zheng

Zhao Zheng

South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China

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Dr. Junsheng Yang

Dr. Junsheng Yang

South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China

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Yuchu Liu

Yuchu Liu

South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China

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Linkun Cai

Linkun Cai

South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China

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Qing-Yun Guo

Qing-Yun Guo

South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China

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Mu Li

Mu Li

South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China

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Dr. Xinpei Li

Dr. Xinpei Li

South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China

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Prof. Tao Lin Sun

Prof. Tao Lin Sun

South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China

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Prof. Geng Xin Liu

Prof. Geng Xin Liu

Center for Advanced Low-Dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai, 201620 China

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Prof. Caili Huang

Prof. Caili Huang

Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074 China

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Prof. Stephen Z. D. Cheng

Prof. Stephen Z. D. Cheng

South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China

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Prof. Thomas P. Russell

Corresponding Author

Prof. Thomas P. Russell

Department of Polymer Science and Engineering, University of Massachusetts Amherst, 120 Governors Drive, Amherst, MA, 01003 USA

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Prof. Panchao Yin

Corresponding Author

Prof. Panchao Yin

South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China

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First published: 18 November 2020
Citations: 7

Abstract

Granular materials, composed of densely packed particles, are known to possess unique mechanical properties that are highly dependent on the surface structure of the particles. A microscopic understanding of the structure-property relationship in these systems remains unclear. Here, supra-nanoparticle clusters (SNPCs) with precise structures are developed as model systems to elucidate the unexpected elastic behaviors. SNPCs are prepared by coordination-driven assembly of polyhedral oligomeric silsesquioxane (POSS) with metal-organic polyhedron (MOP). Due to the disparity in sizes, the POSS-MOP assemblies, like their classic nanoparticles counterparts, ordering is suppressed, and the POSS-MOP mixtures will vitrify or jam as a function of decreasing temperature. An unexpected elasticity is observed for the SNPC assemblies with a high modulus that is maintained at temperatures far beyond the glass transition temperature. From studies on the dynamics of the hierarchical structures of SNPCs and molecular dynamic simulation, the elasticity has its origins in the interpenetration of POSS-ended arms. The physical molecular interpenetration and inter-locking phenomenon favors the convenient solution or pressing processing of the novel cluster-based elastomers.

Conflict of interest

The authors declare no conflict of interest.

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