期刊
ADVANCED FUNCTIONAL MATERIALS
卷 29, 期 15, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201806407
关键词
composite aerogels; high thermal insulation; hydrophobicity; nanofibrils; superflexibility
类别
资金
- National Natural Science Foundation of China [51603035, 51733002]
- Fundamental Research Funds for the Central Universities [2232018D3-01, 2232018A3-01]
- Science and Technology Commission of Shanghai Municipality [16JC1400700, 17ZR1446300]
- National Key Research and Development Program of China [2016YFA0201702/2016YFA0201700]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT16R13]
- China Postdoctoral Science Foundation [2016M591572, 2017T100256]
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- International Joint Laboratory for Advanced Fiber and Low-Dimension Materials, Donghua University [18520750400]
Designing aerogel materials featuring both high thermal insulation property and excellent mechanical robustness is of great interest for applications in superior integrated energy management systems. To meet the above requirements, composite aerogels based on hierarchical stiff-soft binary networks are reported, in which secondary mesoporous polymethylsilsesquioxane domains intertwined by bacterial cellulose nanofibrillar networks are connected in tandem. The resulting composite aerogels are characterized by highly porous (93.6%) and nanosized structure with a surface area of 660 m(2) g(-1), leading to the excellent thermal insulation performance with a low thermal conductivity of 15.3 mW m(-1) K-1. The integrated stiff-soft binary nature also endows the composite aerogels with high flexibility that can conform to various substrates as well as large tensile strength that can withstand more than 2.70 x 10(4) times its own weight. These composite aerogels show multifunctionality in terms of efficient wearable protection, controllable thermal management, and ultrafast oil/water separation. These favorable multifeatures present composite aerogels ideal for aerospace, industrial, and commercial applications.
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