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首页> 外文会议>International Conference of the Polymer Processing Society >Bio-Inspired Polyethylene-based Composite reinforced by Thermoplastic Polyurethane (TPU) Fiber for Aerogel Production
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Bio-Inspired Polyethylene-based Composite reinforced by Thermoplastic Polyurethane (TPU) Fiber for Aerogel Production

机译：用于气凝胶生产的热塑性聚氨酯（TPU）纤维加强的生物启发聚乙烯基复合材料

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A nanocomposite strategy for the selective inclusion of viscoelastic silica modified polyethylene (Si-PE) into thermoplastic polyurethane (TPU) fiber junctions is demonstrated to create effective stress-transfer pathways within three-dimensional (3-D) fiber-reinforced modified polyethylene-based composites with a phenomenal thermal insulation properties. Inspired by the bone architecture in the human body, large amounts of hard segments and small amounts of soft segments, the 3-D interconnected Si-PE w/25% TPU composite achieves synergistic strengthening. The composite is prepared by a wet chemical synthesis approach, a sol-gel reaction, with operation procedure of functional polyethylene while incorporating TPU fiber phase. The solution containing polyethylene precursor initiates network formation throughout the liquid to form a 3-D network (the gel) through chain polymerization. The obtained functional polyethylene-based gel reinforced with TPU fibers is then left to be aged stimulated by time and temperature for structure completion. By the end of aging process, the solvent is extracted from the gels through supercritical drying technique. The remained obtained solid structure is the Si-PE w/TPU composite nanocellular foam called aerogel. The resulting Si-PE w/25% TPU composite aerogel exhibited fully structural deformations and compressive mechanical strength (17.68 MPa at a compressive strain of 90%) at one compression cycle while showing an extremely great thermal stability up to 500 °C. Owing to the combination of excellent mechanical strength and thermal stability properties, the Si-PE w/25% TPU composite can be used as thermal insulation material for strain sensors, showing very short response and load bearing with reliable sensitivity and extreme durability. Such bio-inspired architecture opens the door to fabricate new 3-D-multifunctional and mechanically durable nanocomposite for thermal insulation products and strong partially-flexible devices.
机译：用于选择性将粘弹性二氧化硅改性聚乙烯（Si-PE）选择为热塑性聚氨酯（TPU）纤维结的纳米复合材料策略被证明是在三维（3-D）纤维增强改性聚乙烯基内产生有效的应力转移途径复合材料具有现象绝热性能。灵感来自人体中的骨骼结构，大量的硬链段和少量的软段，3-D相互连接的Si-PE W / 25％TPU复合材料达到协同强化。复合材料通过湿化学合成方法，溶胶 - 凝胶反应，具有功能性聚乙烯的操作方法，同时包含TPU纤维相。含有聚乙烯前体的溶液在整个液体中引发网络形成，通过链聚合形成3D网络（凝胶）。然后将所得用TPU纤维增强的官能聚乙烯基凝胶随着时间和温度刺激的结构完成。在老化过程结束时，通过超临界干燥技术从凝胶中提取溶剂。剩余的获得固体结构是称为气凝胶的Si-PE W / TPU复合纳米细胞泡沫。得到的Si-PE W / 25％TPU复合气凝胶在一个压缩周期下表现出完全结构变形和压缩机械强度（在90％的压缩菌株的压缩菌株17.68MPa），同时显示出高达500℃的极大的热稳定性。由于机械强度优异和热稳定性特性的组合，Si-PE W / 25％TPU复合材料可用作应变传感器的绝热材料，显示出非常短的响应和负载轴承，具有可靠的灵敏度和极端耐用性。这种生物启发架构打开门，以制造新的3-D-多功能和机械耐用的纳米复合材料，用于保温产品和强部分柔性器件。

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