DERIVATIVES OF NATIVE LIGNIN FROM SOFTWOOD FEEDSTOCKS

摘要

The present invention relates to softwood lignin derivatives having an aliphatic hydroxyl content of from about 2.5 mmol/g to about 7 mmol/g lignin, and the preparation method thereof. The lignin derivatives have a desired antioxidant activity characterized by radical scavenging index (RSI). Another aspect of the invention relates to compositions comprising the softwood lignin derivative. Another aspect of the invention relates to a use of the softwood lignin derivatives comprising incorporating the softwood lignin derivatives into polymer compositions.

主权项

1. A softwood lignin derivative recovered from a pulping process of a lignocellulosic biomass, said softwood lignin derivative having an aliphatic hydroxyl content of from about 2.5 mmol/g to about 7 mmol/g, a weight average molecular weight of from about 500 g/mol to about 5000 g/mol, a phenolic hydroxyl content of from about 2 mmol/g to about 8 mmol/g, and a normalized RSI of 10 or greater.