Motloung Mpho Phillip, Ojijo Vincent, Bandyopadhyay Jayita, Ray Suprakas Sinha
DST-CSIR National Centre for Nanostructured Materials, Council for Scientific and, Industrial Research, Pretoria 0001, South Africa.
Department of Chemical Sciences, University of Johannesburg, Doornfontein 2028, South Africa.
Polymers (Basel). 2019 Jul 31;11(8):1270. doi: 10.3390/polym11081270.
The interest in designing new environmentally friendly materials has led to the development of biodegradable foams as a potential substitute to most currently used fossil fuel-derived polymer foams. Despite the possibility of developing biodegradable and environmentally friendly polymer foams, the challenge of foaming biopolymers still persists as they have very low melt strength and viscosity as well as low crystallisation kinetics. Studies have shown that the incorporation of cellulose nanostructure (CN) particles into biopolymers can enhance the foamability of these materials. In addition, the final properties and performance of the foamed products can be improved with the addition of these nanoparticles. They not only aid in foamability but also act as nucleating agents by controlling the morphological properties of the foamed material. Here, we provide a critical and accessible overview of the influence of CN particles on the properties of biodegradable foams; in particular, their rheological, thermal, mechanical, and flammability and thermal insulating properties and biodegradability.
对设计新型环保材料的兴趣促使了可生物降解泡沫的开发，作为目前大多数使用的化石燃料衍生聚合物泡沫的潜在替代品。尽管开发可生物降解和环保型聚合物泡沫是可能的，但发泡生物聚合物的挑战仍然存在，因为它们的熔体强度和粘度非常低，结晶动力学也很低。研究表明，将纤维素纳米结构（CN）颗粒掺入生物聚合物中可以提高这些材料的发泡性。此外，添加这些纳米颗粒可以改善发泡产品的最终性能和性能。它们不仅有助于发泡，还通过控制发泡材料的形态特性充当成核剂。在此，我们对CN颗粒对可生物降解泡沫性能的影响提供了一个关键且易懂的概述；特别是它们的流变学、热学、力学、可燃性、隔热性能和生物降解性。
