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纤维素-粉复合气凝作为热超绝缘材料

Safoura Ahmadzadeh¹, Angelina Sagardui², David Huitink³

¹Department of Food Science, University of Arkansas, Fayetteville, Arkansas 72704, United States.

|December 23, 2024

概括

可持续的微晶纤维素粉 (MCC-S) 气凝被开发为环保包装. 1:2的MCC-S气凝呈现出高孔隙性和低密度,为塑泡提供了一种绿色的替代品.

科学领域:

材料科学材料科学材料科学
可持续化学可持续化学

背景情况:

越来越多的环境问题推动了对可持续包装的需求.
塑料废物带来了重大的环境挑战.
需要为传统包装材料 (如聚烯) 提供环保的替代品.

研究的目的:

合成可生物降解,多孔,轻质,面积大的微晶纤维素粉 (MCC-S) 混合气凝.
研究不同重量比的MCC-S气凝的性能.
评估MCC-S气凝作为可持续的包装绝缘体.

主要方法:

使用超临界二氧化碳 (SC-CO2) 干燥合成的气凝.
准备了五种不同的MCC-S重量比率.
描述包括形态学,结晶性,结构和热性质分析.

主要成果:

与单个组件相比,混合MCC-S气凝表现出优越的性能.
1:2的MCC-S气凝实现了97%的孔隙性和0.058g/cm3的密度.
这种气凝还显示出低的导热率 (0.012 W/(m·K)) 和高的表面积 (258 m2/g).

结论:

混合气凝MCC-S是有前途的可持续材料.
它们为先进的包装提供了出色的绝缘性能.
这些气凝是一种可行的环保替代品.

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