
Preparation of Lignocellulosic Aerogel and Its Flame Retardant Modification
Wang Shuang, Zhang Xin, Sun Miao, Duan Hongjuan, Zhang Haijun, Li Shaoping
Prog Chem ›› 2024, Vol. 36 ›› Issue (4) : 586-600.
Preparation of Lignocellulosic Aerogel and Its Flame Retardant Modification
lignocellulose aerogels possess excellent properties of low density,high porosity,low thermal conductivity and so on,making them widely utilized in thermal insulation,adsorption,catalysis,electromagnetic shielding,biomedical and other fields.Moreover,as a bio-based material,lignocellulose is a green,pollution-free,renewable,and sustainable material.in this paper,the latest research progress of wood-based cellulose and agricultural waste-based cellulose aerogels are reviewed.Then the current research status of lignocellulose aerogel preparation methods including freeze-drying,supercritical drying,and atmospheric drying,is summarized.in addition,for the flammability issues commonly found in lignocellulose aerogels,commonly used methods to improve the flame retardancy of lignocellulose aerogels are discussed in detail.Finally,this paper concludes the main problems in lignocellulose aerogel preparation methods and properties,and the future development direction in this field is proposed。
1 Introduction
2 Lignocellulose aerogels
2.1 Wood-based cellulose aerogels
2.2 Agricultural waste-based cellulose aerogels
3 Preparation of lignocellulose aerogel material
3.1 Freeze-drying preparation of lignocellulose aerogels
3.2 Supercritical drying preparation of lignocellulose aerogels
3.3 Atmospheric pressure drying preparation of lignocellulose aerogels
4 Flame retardants of lignocellulose aerogel
4.1 Inorganic flame retardants
4.2 Organic flame retardants
4.3 Organic/inorganic flame retardants
5 Conclusion and outlook
aerogel / lignocellulose / drying technology / flame retardant properties
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