丙烯酸酯-环氧二阶段树脂可充气展开管

Acrylate-Epoxy Two-stage Resin Inflatable Deployable Tube

摘要

设计了一种可光/热二阶段固化的丙烯酸酯-环氧树脂体系, 探究了丙烯酸酯与环氧树脂的质量比对树脂体系力学性能与形状记忆性能的影响. 将优化得到的丙烯酸酯-环氧树脂体系与芳纶纤维复合制备了复合材料, 通过调节树脂与纤维的含量比, 研究并优化了复合材料的力学性能与形状记忆性能. 进一步利用复合材料制备得到可充气展开管. 实验结果表明, 结合光/热二阶段固化技术制备的可充气展开管能够按需设计成不同的永久形状, 并且结合充气展开技术及材料的形状记忆效应, 可以实现永久形状与新的临时形状间的调控. 此外, 分析了可展开管的长径比对其保压性能、力学性能及形状记忆性能的影响, 并探究了其形状可控的原因. 结果表明, 可展开管形状记忆功能来源于固化后树脂分子构象的可逆变化. 此外, 树脂可分阶段固化特征及模量同步增强是可展开管能够按需设定不同永久形状的根本原因.

Abstract

A two-stage photo/thermal curing acrylate-epoxy resin system was designed, and the influence of the mass ratio between acrylate and epoxy resin on the material’s mechanical properties and shape memory properties was explored. The optimized acrylate-epoxy resin system was used to prepare composite materials with aramid fibers. By adjusting the resin-fiber content ratio, the mechanical properties and shape memory properties of the composites were studied and optimized. Meanwhile, an inflatable deployable tube was fabricated using the composite materials. The experimental results show that based on the photo/thermal two-stage curing technology, the inflatable deployable tube can be designed into different permanent shapes as required. At the same time, by combining the inflatable deployment technology and the shape memory effect of the material, state control between the permanent shape and the new temporary shape can be achieved. In addition, the influence of the length-to-diameter ratio of the deployable tube on its pressure retention performance, mechanical property and shape memory property was analyzed in detail, and the theoretical analysis of the controllability of its shape was carried out. Results indicate that the shape memory function of the deployable tube originates from the reversible change of the molecular conformation of the resin after curing. In addition, the two-stage curing characteristics of the resin and the synchronous increase in modulus are the fundamental reasons why the deployable tube can be set to different permanent shapes as required.

关键词

丙烯酸酯-环氧树脂体系 / 光/热二阶段固化技术 / 形状记忆复合材料 / 可充气展开管

Key words

Acrylate-epoxy resin system / Photo/thermal two-stage curing technology / Shape memory composite / Inflatable deployable tube

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基金资助

国家自然科学基金(52273317)