Preparation and characterization of flame-retardant and thermal insulating bio-based composite aerogels

Preparation of Bioaerogel from Iron-Rich Microalgae for the Removal of Water Pollutants

“…The absorption peak at 3410 cm −1 was ascribed to the -OH groups, which became broad for the treated CP and Fe-CP aerogel. The peaks at 2924 cm −1 and 1384 cm −1 were related to the symmetric bending of the -CH or -CH2 groups [32]. Compared with untreated CP, the peak at 1643 cm −1 became stronger, indicating the increased carboxylic acids after NaOH treatment.…”

Renewable biomass-based aerogels: from structural design to functional regulation

“…Natural BAs usually exhibit very high flammability due to their high hydrocarbon content, which limits the application of biomass-based aerogels. In order to improve the flame retardancy of biomass-based aerogels, a large number of studies have shown that incorporating some non-flammable inorganic and/or organic substances, 108 such as metal oxides and sulfides, 109 borax, 110 silica, 88 phytic acid (PA), melamine, 111,112 sodium-montmorillonite, 113 sodium bicarbonate, 114 and ammonium polyphosphate, 115 into BAs can impart flame retardant properties to them (Fig. 22a).…”

Bio-inspired Wood Mimic Materials Created by Recombining Cellulose, Hemicellulose and Lignin

“…For these reasons and more, biopolymers, as a renewable, non-toxic, and biodegradable source of materials, have become the focus of modern material science and chemical engineering. Recent trends in various materials like hydrogels [5,6], aerogels [7,8], films [9,10], and fibers [11,12] show an increasing number of works focused on biopolymer-centered systems.…”

“…The addition of lignin reduces the intensity of these peaks, indicating partial surface coating. At the same time, lignin aromatic ring C=C double bond stretching (7) is introduced in the L5 spectra [57]. In contrast, adding xylan alters the characteristic double C-O peak intensities and introduces a new C-O peak at 976 cm -1 , which is commonly used for xylan identification [58].…”