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面向塑料回收的工业级PP/PE物理合金化技术
Jinping Qu, Zhaoxia Huang, Zhitao Yang, Guizhen Zhang, Xiaochun Yin, Yanhong Feng, Hezhi He, Gang Jin, Ting Wu, Guangjian He, Xianwu Cao
工程（英文） ›› 2022, Vol. 9 ›› Issue (2) : 95-100.
PDF(1812 KB)
PDF(1812 KB)
面向塑料回收的工业级PP/PE物理合金化技术
Industrial-Scale Polypropylene-Polyethylene Physical Alloying Toward Recycling
聚丙烯（PP）和聚乙烯（PE）在日常生活中无处不在。但PP和PE的相容性较差，通过简单熔融共混难以制备具有良好力学性能的合金，为废弃PP、PE的回收再利用带来难题。此外，由于可能存在的环境污染问题，传统的添加相容剂诱导增容的方法也难以得到广泛应用。在本文中，受到中国传统榨油方法的启发，我们报道了一种简单的、可工业化的无添加制备高度取向蜂窝结构PP/PE 二元共混物的新技术。由于独特的蜂窝结构，共混物的力学性能高于其亲系材料，也高于采用传统密炼机制备的样品。因此，本文报道的方法不仅可以应用于不相容聚合物体系的物理增容，也可以为无添加、免分拣的废旧塑料回收提供一种新路径。我们期待通过该技术可以实现废弃塑料环境友好且可持续的循环高值利用。
Polypropylene (PP) and polyethylene (PE) play central roles in our daily life. However, their immiscibility presents a major hurdle in both industry and academia when recycling them into alloys with favorable mechanical properties. Moreover, typical compatibilizer-enabled approaches are limited due to increased environmental concerns. Herein, inspired by a traditional Chinese technique, we report a facile, industryscale methodology that produces a PP/PE binary blend with a highly ordered honeycomb nanostructure without any additives. Due to its nanostructure, the blend exhibits enhanced tensile properties in comparison with the parent components or with a sample prepared using an internal mixer. This approach has potential for applications not only in immiscible polymer blending, but also in non-sorting, compatibilizer-free waste plastics recycling. Through this technique, we expect that an environmentally friendly and sustainable plastic wastes recycling avenue can be found, and great economic benefits can be gained.
Polypropylene / Polyethylene / Physical alloying / Honeycomb structure
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