Ultrahigh energy-dissipation elastomers by precisely tailoring the relaxation of confined polymer fluids.
Ultrahigh energy-dissipation elastomers by precisely tailoring the relaxation of confined polymer fluids.
复制标题
通过精确定制受限聚合物流体的松弛来获得超高能量耗散弹性体
DOI：
10.1038/s41467-021-23984-2
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发表时间：
2021-06-14
影响因子：
16.6
通讯作者：
Liu M
中科院分区：
文献类型：
--
作者：
Huang J;Xu Y;Qi S;Zhou J;Shi W;Zhao T;Liu M
耗能弹性体依靠其玻璃化转变区链段的粘弹性能有效地抑制各种领域的振动和噪声，但其工作频率难以精确控制且范围较窄。在这里，我们报告了一种协同策略，用于构建聚合物-流体-凝胶，其在宽频率范围内提供可控的微扰能量耗散，这是传统手段难以实现的。这是通过精确调整弹性网络中受限聚合物流体的松弛来实现的。这种组合的共生关系涉及：弹性网络形成弹性基质，显示可逆变形和聚合物流体来回蠕动以耗散机械能。使用原型聚（丙烯酸正丁酯）弹性体，我们证明聚合物-流体-凝胶在宽频率范围（10 - 2~ 108 Hz）内表现出可控的超高能量耗散性能（损耗因子大于0.5）。在相同的动应力下，聚合物-流体-凝胶的能量吸收比商业阻尼材料高200倍以上。此外，它们的模量在工作频率范围内是准稳定的。
Energy-dissipation elastomers relying on their viscoelastic behavior of chain segments in the glass transition region can effectively suppress vibrations and noises in various fields, yet the operating frequency of those elastomers is difficult to control precisely and its range is narrow. Here, we report a synergistic strategy for constructing polymer-fluid-gels that provide controllable ultrahigh energy dissipation over a broad frequency range, which is difficult by traditional means. This is realized by precisely tailoring the relaxation of confined polymer fluids in the elastic networks. The symbiosis of this combination involves: elastic networks forming an elastic matrix that displays reversible deformation and polymer fluids reptating back and forth to dissipate mechanical energy. Using prototypical poly (n-butyl acrylate) elastomers, we demonstrate that the polymer-fluid-gels exhibit a controllable ultrahigh energy-dissipation property (loss factor larger than 0.5) with a broad frequency range (10−2~ 108Hz). Energy absorption of the polymer-fluid-gels is over 200 times higher than that of commercial damping materials under the same dynamic stress. Moreover, their modulus is quasi-stable in the operating frequency range.
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