Alkaline hydrolysis of the natural lignin of cottonplant stems in the presence of anthraquinone

Abstract

The study of a three-stage alkaline hydrolysis of the natural lignin of cottonplant stems has shown that the bulk of the lignin undergoes fragmentation during stage I. The addition of anthraquinone leads to an appreciable increase in the yield of low-molecular-mass hydrolysis products.

Thermoplastic Starch Biocomposite Films Reinforced with Nanocellulose from Agave tequilana Weber var. Azul Bagasse

“…Anthraquinone can cause oxidation of the terminal reducing group of carbohydrates, generating stability in terms of terminal depolymerization reactions [ 47 ]. On the other hand, anthraquinone causes an acceleration of hydrolysis reactions on lignin, forming fragments of lignin of lower molecular weight, which is reflected in an increase in the degree of delignification [ 48 ].…”

Green synthesis of nanosilica by thermal decomposition of pine cones and pine needles

“…According to the best of our knowledge, there is no previous 70 report about the preparation of the nanosilica particles using the 71 pine cones and pine needles as raw materials. 72 Plenty of works have been done on acid or base pretreatment of 73 herbaceous materials to hydrolysis lignocelluloses structures of 74 plants, such as dilute acid pretreatment of rice straw [29][30][31] 75 and alkaline hydrolysis of cotton plant stems [32]. This pretreat-76 ment process can remove hemicelluloses, reduce cellulose crys-77 tallinity and increase the porosity of materials [33].…”