CHEMICAL MODIFICATION OF LIGNIN AND LIGNIN DERIVATIVES

摘要

A method for producing a trans-esterified hydroxypropyl lignin (HPL) is provided in one example embodiment and includes precipitating a lignin, dissolving the precipitated lignin in a solution, adding a reagent to the solution, adjusting the pH of the solution, allowing reactions in the solution to occur for a predetermined amount of time, precipitating the solution to produce a precipitate, and washing, filtering, and drying the precipitate to produce the trans-esterified HPL. In one example, a thermoplastic may be added to produce a trans-esterified HPL/thermoplastic blend.

主权项

1. A method for producing a biodegradable plastic, the method comprising:
extruding a trans-esterified lignin/thermoplastic blend, the trans-esterified lignin/thermoplastic blend comprising: a trans-esterified hydroxypropyl lignin (HPL), wherein the trans-esterified HPL is created by:
precipitating a lignin;dissolving the precipitated lignin in a solution;adding a reagent to the solution;adjusting a pH of the solution;allowing reactions in the solution to occur for a predetermined amount of time such that the lignin has undergone transesterification with a nearby polyester macromolecule from a polyester, thereby transferring a segment of the polyester onto the lignin;precipitating the solution to produce a precipitate; andwashing, filtering, and drying the precipitate to produce the lignin/thermoplastic polyester blend.