Robust liquid crystal semi-interpenetrating polymer network with superior energy-dissipation performance

Zhijun Yang, Yang Yang, Huan Liang, Enjian He, Hongtu Xu, Yawen Liu, Yixuan Wang, Yen Wei and Yan Ji ()
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Zhijun Yang: Tsinghua University
Yang Yang: Tsinghua University
Huan Liang: Tsinghua University
Enjian He: Tsinghua University
Hongtu Xu: Tsinghua University
Yawen Liu: Tsinghua University
Yixuan Wang: Tsinghua University
Yen Wei: Tsinghua University
Yan Ji: Tsinghua University

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: Abstract Liquid crystal networks (LCN) have attracted surging interest as extraordinary energy-dissipation materials owning to their unique dissipation mechanism based on the re-orientation of mesogens. However, how to integrate high Young’s modulus, good dissipation efficiency and wide effective damping temperature range in energy-dissipation LCN remains a challenge. Here, we report a strategy to resolve this challenge by fabricating robust energy-dissipation liquid crystal semi-interpenetrating polymer network (LC-semi-IPN) consisting crystalline LC polymers (c-LCP). LC-semi-IPN demonstrates a superior synergistic performance in both mechanical and energy-dissipation properties, surpassing all currently reported LCNs. The crystallinity of c-LCP endows LC-semi-IPN with a substantial leap in Young’s modulus (1800% higher than single network). The chain reptation of c-LCP also promotes an enhanced dissipation efficiency of LC-semi-IPN by 200%. Moreover, its effective damping temperature reaches up to 130 °C, which is the widest reported for LCNs. By leveraging its exceptional synergistic performance, LC-semi-IPN can be further utilized as a functional architected structure with exceptional energy-dissipation density and deformation-resistance.

Date: 2024
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DOI: 10.1038/s41467-024-54233-x

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