Polysaccharide and lignin modification using reactive extrusion (REX)

Romain Milotskyi (1) , Christophe C. Bliard (1)

1 ICMR - Institut de Chimie Moléculaire de Reims - UMR 7312

Natural polymers possess physicochemical properties in their native state, which limit their use in many industrial sectors. Even limited chemical modifications radically change the properties of these macromolecular entities. Chemical modifications commonly performed at industriallevel production in solution or in batches [1] are often laborious and difficult to monitor. In addition, these processes suffer from energy cost and environmental issues caused by unreacted components and co-products. Reactive extrusion offers a simple process, using no solvents, shorter reaction time and improved efficacy [2-4]. In the present work we describe a method of chemical modification using reactive extrusion process (REX). In this project three families of biopolymers: starch, cellulose and lignin are studied. In the following example carboxymethyl starches (CMS) with various degrees of substitution (DS) were synthesized in one step and with high levels of reaction efficiency (RE). The results on the distribution of the carboxymethyl functions on the three different positions of the glucose monomer as well as the kinetics of the reaction are analyzed and discussed.

Mots clés: Reactive extrusion process; Starch carboxymethylation

Domaines: Chimie organique; Polymères; Autre; Génie chimique

Romain Milotskyi, Christophe C. Bliard. Polysaccharide and lignin modification using reactive extrusion (REX). 14ème Journée scientifique du GFP Section Grand-Est, Jun 2016, Nancy, France. , 2016. ⟨hal-02297394⟩