Synthesis and Structural Characteristics of Organic Aerogels with Different Content of Lignin
Lignin can be used as a cheap raw material to prepare organic and carbon aerogels based upon the sol-gel reactions. Different concent lignin organic aerogels have been prepared by sol–gel polymerization of formaldehyde with resorcinol, following by the process of RF-gel production and subsequent freeze drying. The resulting materials were characterized by FT-IR analysis, nitrogen adsorption, transmission electron microscopy and Scanning electron micrographs. The structural properties organic aerogel depend on the amount of lignin added to the sol-gel system. and the LRF aerogels obtained in the experimental have an open cell structure with continuous porosity and homogeneous spherical particles.
Zhenyu Du and X.B Sun
F. Chen and J. Li, "Synthesis and Structural Characteristics of Organic Aerogels with Different Content of Lignin", Advanced Materials Research, Vols. 113-116, pp. 1837-1840, 2010