Stretchable Polyurethane Sponge Scaffold Strengthened Shear Stiffening Polymer and Its Enhanced Safeguarding Performance

• DOI: 10.1021/acsami.5b12083
• Publication Date: 2016-02-02T15:13:33Z
• Authors: Sheng Wang; Shouhu Xuan; Yunpeng Wang; Chenhui Xu; Ya Mao; Mei Liu; Linfeng Bai; Wanquan Jiang; Xinglong Gong
• Keywords: Stiffening; Shear modulus

A simple and scalable "dip dry" method was developed for fabricating stretchable polyurethane sponge-based polymer composite with excellent shear stiffening effect, creep resisting adhesion property. The stiffness of the tunable, storage modulus (G') could automatically increase 3 orders magnitude increasing frequency, G'max reach to as high 1.55 MPa. Importantly, ideal damping capacity reduced impact force by 2 even under 26 cycles consecutive dynamic loading no obvious mechanical degradation. Moreover, an enhancing mechanism proposed it found "B-O cross bond" entanglement chains were attributed characteristic. Finally, ability hydrophobicity guarantee reliable performance longer lifespan.