Realization of polyurethane/epoxy interpenetrating polymer networks with a broad high-damping temperature range using β-cyclodextrins as chain extenders
Realization of polyurethane/epoxy interpenetrating polymer networks with a broad high-damping temperature range using β-cyclodextrins as chain extenders
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使用β-环糊精作为扩链剂实现具有宽高阻尼温度范围的聚氨酯/环氧互穿聚合物网络
DOI：
10.1016/j.matdes.2021.110208
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发表时间：
2021-12
期刊：
影响因子：
--
通讯作者：
Shaoyun Guo
中科院分区：
文献类型：
--
作者：
Qiang Feng;Menglu Shen;Jiaming Zhu;Jiang Li;Jie Zhang;Shaoyun Guo
阻尼材料，特别是高阻尼（损耗因子(tanδ) >.5及以上）材料在工业领域中广泛应用于抑制振动和控制噪声，但在宽温度范围内实现高tanδ是一项具有挑战性的任务。本文报道了一种以21-羟基β-环糊精（β-CDs）为PU扩链剂的聚氨酯(PU)/环氧树脂（EP）互穿聚合物网络（IPN）阻尼材料。当羟基与异氰酸酯基团的比例较高时，每个β-CD都经历了不同程度的链扩张。接枝不同数量PU链的β-CDs产生不同大小的硬段，从而增加了运动单元的种类，扩大了阻尼温度范围。β-CDs上未反应的羟基提供了大量的氢键质子，这些质子可以与氨基形成氢键，从而促进了tanδ值的增加。因此，成功制备了具有宽高阻尼温度范围的PU/EP IPNs。结果表明，β-CDs固化的PU/EP IPNs的阻尼温度范围为93.1 K （tanδ > 0.5）、82.4 K （tanδ > 0.7）甚至74.1 K (tanδ > 0.8)，明显优于传统三羟基三甲基丙烷（TMP）固化的PU/EP IPNs的32.9 K、23.9 K和20.5 K。
Damping materials, especially high-damping (loss factor (tanδ) > 0.5 and above) materials, are widely applied for suppressing vibration and controlling noise in industrial field, but achieving a high tanδ over a wide temperature range is a challenging task. Herein, we report a novel polyurethane (PU)/epoxy (EP) interpenetrating polymer network (IPN) damping material by using 21-hydroxyl β-cyclodextrins (β-CDs) as PU chain extenders. At a high ratio of hydroxyls to isocyanate groups, every β-CD underwent a different degree of chain expansion. Then these β-CDs grafting different numbers of PU chains generated different-size hard segments, thus increasing the species of motion units and widening the damping temperature range. The unreacted hydroxyls on β-CDs provided a large quantity of hydrogen bonding protons, which could form hydrogen bonds with urethane groups, thus facilitating an increase in the tanδ value. Therefore, PU/EP IPNs with a broad high-damping temperature range were successfully prepared. The results showed that PU/EP IPNs cured by β-CDs underwent a damping temperature range of 93.1 K (tanδ > 0.5), 82.4 K (tanδ > 0.7) and even 74.1 K (tanδ > 0.8), much better than the corresponding 32.9 K, 23.9 K and 20.5 K for traditional PU/EP IPNs cured by trihydroxyl trimethylolpropane (TMP).
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影响因子：
6
作者：
Wenwen Yu;De-zhi Zhang;M. Du;Q. Zheng
通讯作者：
Wenwen Yu;De-zhi Zhang;M. Du;Q. Zheng
影响因子：
3
作者：
Li, Lianzhen;Tian, Bo;Liu, Haitao
通讯作者：
Liu, Haitao
影响因子：
5.5
作者：
Wenwen Yu;M. Du;De-zhi Zhang;Yu Lin;Q. Zheng
通讯作者：
Wenwen Yu;M. Du;De-zhi Zhang;Yu Lin;Q. Zheng
影响因子：
9.1
作者：
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通讯作者：
Jyh-Horng Wu;Chia-Hao Li;Yao-Tsu Wu;M. Leu;Y. Tsai
影响因子：
6.3
作者：
J. Zhang;Dan Yao;M. Shen;X. Sheng;Jiang-Qiang Li;Guo Shaoyun
通讯作者：
J. Zhang;Dan Yao;M. Shen;X. Sheng;Jiang-Qiang Li;Guo Shaoyun