Magnetic biochar from spent coffee grounds as filler in bioplastic composites

被引：1

作者：

Lopez-Mireles, Daniela A. ^{[1
]}

Velazquez-Galvan, Yenni G. ^{[2
]}

Encinas, Armando ^{[2
]}

机构：

[1] Inst Potosino Invest Cient & Tecnol, Div Mat Avanzados, Camino Presa San Jose 2055,Lomas 4ta, San Luis Potosi 78216, Mexico

[2] Inst Tecnol & Estudios Super Occidente, Dept Matemat & Fis, Periferico Sur Manuel Gomez Morin 8585, Tlaquepaque 45604, Jalisco, Mexico

来源：

MATERIALS LETTERS | 2024年 / 372卷

关键词：

Magnetic biochar; Pectin-based films; Magnetic properties; Sustainable materials; Thermal stability;

D O I：

10.1016/j.matlet.2024.137046

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study focuses on the synthesis of magnetic biochar derived from spent coffee grounds and their use in biodegradable pectin composite films. X-ray diffraction and Raman spectroscopy confirmed an amorphous char structure with embedded crystalline magnetite in the magnetic biochar. For the composite films, the hysteresis loops show a magnetic behavior reminiscent of a soft magnet with a low coercive field of 90 Oe and 14 % remanence. Thermogravimetric analysis revealed improved thermal stability of the composite films compared to pure pectin films. The proposed approach offers enhanced thermal properties and magnetic functionality, with potential applications in sustainable packaging, electromagnetic shielding and environmental sensing.

引用

页数：4

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