甲壳素
超顺磁性
材料科学
催化作用
生物高聚物
磁性纳米粒子
生物矿化
纳米颗粒
纳米技术
化学工程
自愈水凝胶
磁化
聚合物
壳聚糖
化学
有机化学
高分子化学
复合材料
工程类
物理
量子力学
磁场
作者
Mohammad Peydayesh,Elisa Boschi,Massimo Bagnani,Daniel Tay,Felix Donat,Hamed Almohammadi,Mingqin Li,Mattia Usuelli,T. Shiroka,Raffaele Mezzenga
出处
期刊:ACS Nano
[American Chemical Society]
日期:2024-02-12
卷期号:18 (8): 6690-6701
被引量:2
标识
DOI:10.1021/acsnano.4c00883
摘要
In the quest for a sustainable and circular economy, it is essential to explore environmentally friendly alternatives to traditional petroleum-based materials. A promising pathway toward this goal lies in the leveraging of biopolymers derived from food waste, such as proteins and polysaccharides, to develop advanced sustainable materials. Here, we design versatile hybrid materials by hybridizing amyloid nanofibrils derived by self-assembly of whey, a dairy byproduct, with chitin nanofibrils exfoliated from the two distinct allomorphs of α-chitin and β-chitin, extracted from seafood waste. Various hydrogels and aerogels were developed via the hybridization and reassembly of these biopolymeric nanobuilding blocks, and they were further magnetized upon biomineralization with iron nanoparticles. The pH-phase diagram highlights the significant role of electrostatic interactions in gel formation, between positively charged amyloid fibrils and negatively charged chitin nanofibrils. Hybrid magnetic aerogels exhibit a ferromagnetic response characterized by a low coercivity (<50 Oe) and a high specific magnetization (>40 emu/g) at all temperatures, making them particularly suitable for superparamagnetic applications. Additionally, these aerogels exhibit a distinct magnetic transition, featuring a higher blocking temperature (200 K) compared to previously reported similar nanoparticles (160 K), indicating enhanced magnetic stability at elevated temperatures. Finally, we demonstrate the practical application of these hybrid magnetic materials as catalysts for carbon monoxide oxidation, showcasing their potential in environmental pollution control and highlighting their versatility as catalyst supports.
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