Graphene oxide/thermoplastic polyurethane wrinkled foams with enhanced compression performance fabricated by dynamic supercritical CO2 foaming

编号 020034305

推送时间 20220516

研究领域 林产化工 

年份 2022 

类型 期刊 

语种 英语

标题 Graphene oxide/thermoplastic polyurethane wrinkled foams with enhanced compression performance fabricated by dynamic supercritical CO2 foaming

来源期刊 Journal of Applied Polymer Science

期 第343期

发表时间 20220507

关键词 compression properties;  dynamic supercritical carbon dioxide foaming;  graphene oxide;  thermoplastic polyurethane;  wrinkly structure; 

摘要 Thermoplastic polyurethane (TPU) foams are commonly used buffering materials due to their lightweight, high elasticity, and excellent energy absorption properties. Improving their compressive property without increase foam density is a challenge for TPU foams. Herein, graphene oxide (GO)/TPU composite foams containing micro-sized wrinkles on the cell surface were fabricated by a novel dynamic supercritical carbon dioxide (scCO(2)) foaming method. The addition of GO created hydrogen bonding and physical crosslinking sites with the TPU molecules, which acted as nucleation agents to improve the cell density of the GO/TPU foams. With the increase of GO content, the mechanical properties of GO/TPU foams were significantly enhanced, and the wrinkled foams prepared via dynamic scCO(2) foaming displayed superior compressive modulus, strength, energy absorption, and recoverability compared with the counterpart foams without wrinkly structure. The wrinkled GO/TPU foams with 0.5 wt% GO revealed higher expansion ratio, lower foam density, superior compressive property and energy absorption than both neat TPU and 1 wt% GO foams owing to the reinforcing effect of the wrinkly structure. This study is of great significance in the development of low-density composite foams with enhanced compressive performance by wrinkly structures.

服务人员 尚玮姣

服务院士 宋湛谦

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