期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 7, 页码 4946-4954出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b12083
关键词
shear stiffening stretchable polyurethane sponge; adhesion; hydrophobicity; energy dissipation
资金
- National Natural Science Foundation of China [11372301, 11572309, 11572310]
- Anhui Provincial Natural Science Foundation of China [1408085QA17]
- National Basic Research Program of China (973 Program) [2012CB937500]
- Collaborative Innovation Center of Suzhou Nano Science and Technology
A simple and scalable dip and dry method was developed for fabricating stretchable polyurethane sponge-based polymer composite with excellent shear stiffening effect, creep resisting and adhesion property. The stiffness of the composite was tunable, the storage modulus (G') could automatically increase 3 orders of magnitude with the increasing of shear frequency, and the G(max)' could reach to as high as 1.55 MPa. Importantly, the composite with ideal damping capacity reduced the impact force by 2 orders of magnitude even under 26 cycles of consecutive dynamic impact loading with no obvious mechanical degradation. Moreover, an enhancing mechanism was proposed and it was found the B-O cross bond and the entanglement of polymer chains were attributed to the shear stiffening characteristic. Finally, the excellent adhesion ability and hydrophobicity guarantee the composite with reliable mechanical performance and longer lifespan.
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