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首页> 外文会议>9th Annual Global Plastics Environmental Conference (GPEC) Feb 26-27, 2003 Detroit MI >Emerging Green Nanocomposites: Striving for Sustainability in Automotive Applications
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Emerging Green Nanocomposites: Striving for Sustainability in Automotive Applications

机译：新兴的绿色纳米复合材料：努力实现汽车应用的可持续性

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Polymer nanocomposites - generally a polymer containing modified nanoclay additives have been used commercially for a few years in niche applications. Automakers now see strong promise in polymer clay nanocomposites especially in polypropylene (PP)/Thermoplastic polyolefin (TPO)/Nylon based nanocomposites. The 1st practical example of polymeric nanocomposites for automotive applications is nylon 6 - clay used to make a timing-belt cover by the Toyota Motor Company. General Motors recently launched a production part, "step-assist" for 2002 GMC Safari - - as the first exterior application. FORD is also active in finding polymer-clay nanocomposites in its auto parts use. Nanocomposites are lighter than metals and filled composites - - thus main motivation for large fuel and energy savings in transportation. True nanocomposites exhibit improved stiffness/strength without sacrifice of toughness besides showing much reduced gas permeability (improved barrier properties), lower coefficient of thermal expansion and improved heat deflection temperature. All the above-mentioned nanocomposites are based on clay and petroleum-based nonbiodegradable polymers. There is a growing urgency to develop novel biobased products and innovative technologies that can reduce the US dependence on fossil fuel and save our precious environment. Green/biobased nanocomposites are the next generation of materials for the future. Renewable resource-based biodegradable polymers including cellulosic plastic (plastic made from tree/wood), polylactic acid, PLA (Corn-derived plastic) and Polyhydroxyalkanoate, PHA (Bacterial polyesters) are some the potential biopolymers which on effective reinforcement with nanoclay can generate so called "green" nanocomposites for automotive applications. However such newly developing green nanocomposites need to be "sustainable" to compete with existing petroleum-based polymer clay nanocomposites. Green nanocomposites derived from renewable resources, having recycling capability and triggered biodegradability (i.e. stable in their intended lifetime but would biodegrade after disposal) with commercial viability and environmental acceptability are termed as "sustainable".
机译：聚合物纳米复合材料-通常，含有改性纳米粘土添加剂的聚合物已经在小众应用中商业化使用了几年。现在，汽车制造商看到了聚合物粘土纳米复合材料的强劲前景，特别是在聚丙烯（PP）/热塑性聚烯烃（TPO）/尼龙基纳米复合材料中。用于汽车应用的聚合物纳米复合材料的第一个实际例子是尼龙6-丰田汽车公司用于制造定时皮带套的粘土。通用汽车最近推出了2002 GMC Safari的量产零件“ step-assist”，这是第一个外部应用程序。 FORD在其汽车零件用途中也积极寻找聚合物粘土纳米复合材料。纳米复合材料比金属和填充的复合材料轻-因此是运输中节省大量燃料和能源的主要动力。真正的纳米复合材料不仅显示出大大降低的透气性（改善的阻隔性能），较低的热膨胀系数和改善的热变形温度，而且显示出改善的刚度/强度而不牺牲韧性。所有上述纳米复合材料均基于粘土和石油基不可生物降解的聚合物。迫切需要开发出新颖的生物基产品和创新技术，以减少美国对化石燃料的依赖并节省我们宝贵的环境。绿色/生物基纳米复合材料是未来的下一代材料。可再生资源为基础的生物可降解聚合物，包括纤维素塑料（由树/木材制成的塑料），聚乳酸，PLA（玉米衍生塑料）和聚羟基链烷酸酯，PHA（细菌聚酯）是在纳米粘土有效增强下可产生的潜在生物聚合物，因此称为“绿色”汽车应用纳米复合材料。然而，这种新开发的绿色纳米复合材料必须是“可持续的”才能与现有的石油基聚合物粘土纳米复合材料竞争。具有商业可行性和环境可接受性的，来自可再生资源的绿色纳米复合材料具有再循环能力和触发的生物降解性（即，在其预期寿命内稳定，但在处置后会生物降解），被称为“可持续性”。

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