What is claimed is:
1. A bio-polyol composition, comprising:
a polyol;a surface-modified lignin; anda surfactant represented by formula 1wherein R is represented by CnH2n+1, n is an integer of 0 to 3; x/y is between 5 and 13; a is an integer of 1 to 100; b is an integer of 1 to 100.
CROSS-REFERENCE TO RELATED APPLICATION
This application claims the priority benefit of Taiwan application serial no. 104140904, filed on Dec. 7, 2015. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.