游牧分子钥匙驱动的即时共价重建使得超高冲击强化聚合物盔甲成为可能
Xiao-Yun Li1, Fu-Rong Zeng1,2, Jian-Wen Ma1
1The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials (MoE), National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Advanced Polymer Materials, College of Chemistry, Sichuan University, Chengdu, China.
Advanced materials (Deerfield Beach, Fla.)
|February 23, 2026
概括
研究人员使用分子关键策略开发了一种新型冲击强化聚合物. 这种材料提供了特殊的强度和能量消耗,显著减少了先进的保护应用的冲击力.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 纳米技术 纳米技术
背景情况:
- 抗冲击硬化材料对于安全至关重要,但面临诸如高激活应变/速率和低能耗等挑战.
- 当前的材料很难满足极端冲击事件的需求.
研究的目的:
- 使用游牧分子关键驱动方法开发超高冲击强化策略.
- 克服现有材料的局限性,例如激活值和硬化歇斯底里.
主要方法:
- 设计的聚 styrene-thioctic 酸 (PSTx) 结合了 thioctic 酸 (TA) 作为一个分子关键.
- 利用应变率敏感分子引发共价重建和纳米领域聚合.
- 使用二硫化物/键来消耗能量,以及用于物理交联的基.
主要成果:
- PSTx表现出超低的放松时间 (15.8毫秒) 和2925倍的硬化反应,伸展能力>4000%.
- 实现了高模量 (5.8 GPa),创纪录的强度 (84.3 MPa) 和出色的能耗 (12.4 MJ/m3),降低了97%的撞击力.
- 开发了可穿戴复合材料,超过957%的冲击力减弱和360%的穿孔阻力.
结论:
- 可切换分子钥匙的策略有效地解决了冲击硬化材料中的激活值和硬化歇斯底里.
- PSTx为智能装甲和保护系统提供了一个有前途的范式.
- 这一突破可以通过受控的分子机制实现高效的抗冲击和能量消散.
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