Double-negative-index ceramic aerogels for thermal superinsulation

Author:

Xu Xiang12ORCID,Zhang Qiangqiang3ORCID,Hao Menglong45ORCID,Hu Yuan6ORCID,Lin Zhaoyang1ORCID,Peng Lele1,Wang Tao1ORCID,Ren Xuexin4,Wang Chen7ORCID,Zhao Zipeng7ORCID,Wan Chengzhang1ORCID,Fei Huilong1,Wang Lei8,Zhu Jian8,Sun Hongtao19ORCID,Chen Wenli2,Du Tao2,Deng Biwei10,Cheng Gary J.10ORCID,Shakir Imran11ORCID,Dames Chris412ORCID,Fisher Timothy S.6,Zhang Xiang4,Li Hui2ORCID,Huang Yu7ORCID,Duan Xiangfeng1ORCID

Affiliation:

1. Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA.

2. Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, P. R. China.

3. College of Civil Engineering and Mechanics, Key Laboratory of Mechanics on Disaster and Environment in Western China, Lanzhou University, Lanzhou 730000, P. R. China.

4. Department of Mechanical Engineering, University of California, Berkeley, CA 94720, USA.

5. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, P. R. China.

6. Department of Mechanical and Aerospace Engineering and California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA.

7. Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA.

8. State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China.

9. Department of Mechanical and Industrial Engineering, New Jersey Institute of Technology, Newark, NJ 07102, USA.

10. School of Industrial Engineering, Purdue University, West Lafayette, IN 47907, USA.

11. Sustainable Energy Technologies Centre, College of Engineering, King Saud University, Riyadh, Kingdom of Saudi Arabia.

12. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.

Abstract

Elastic ceramics Aerogels hold promise as lightweight replacements for thermal insulation. However, poor mechanical stability has hampered progress in moving toward commercialization. Xu et al. designed a mechanical metamaterial that pinches in a small amount when you compress it (see the Perspective by Chhowalla and Jariwala). This is characteristic of materials with a negative Poisson's ratio and dramatically improves mechanical stability. The trick was using three-dimensional graphene structures to template the ceramic aerogels, thus producing a superinsulating material endowed with excellent mechanical properties. Science , this issue p. 723 ; see also p. 694

Funder

Office of Naval Research

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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