Nature and Constitution of Shellac

Chromium speciation analysis by separation of Cr(III) from Cr(VI) on a XAD sorbent derivatized with shellac: a natural polymer

“…The suitability of XAD-16 to solid-phase extraction was attributed to its good physical and chemical properties such as porosity, uniform pore distribution, high surface area, and satisfactory adsorptive properties in terms of favourable surface chemistry [36]. Preliminary experiments showed that complex fractionation of shellac with sequential solvent extraction [37], where each resin constituent would show an affinity toward a different organic solvent, could not maintain its favourable Cr(III)-adsorptive properties when immobilized on a XAD copolymer. Since shellac was immobilized on XAD from its alcoholic solution, the simple procedure comprising EtOH dissolution, followed by filtration and vacuum evaporation of the filtrate, was chosen as the appropriate method of shellac purification.…”

Fabrication of functional anisotropic food-grade micro-rods with micro-particle inclusions with potential application for enhanced stability of food foams

“…1. The food-grade materials (shellac, [20][21][22] ethyl cellulose 23 ) were dissolved in appropriate solvents. To these viscous solutions, micro-particles were added at various concentrations as specified below.…”

Scalable fabrication of anisotropic micro-rods from food-grade materials using an in shear flow dispersion–solvent attrition technique

“…Shellac wax (or 'lac') is edible and is one of the highest melting point natural waxes which gives good mechanical properties for formation of micro-rod structures. It has a complex composition [18][19][20] and although its exact structure is unknown it is recognised that it can exhibit significant surface activity due to the hydrophobic nature of its components. Ethyl cellulose is approved by the FDA 21 as safe for human consumption and has been used as a coating agent in food formulations and as a tablet excipient in the pharmaceutical industry.…”