Table 2. Weight-Average (Mw) and Number-Average (Mn) Molecular Weights and Polydispersity Indices (PDI, Mw/Mn) of Lignin Extracted from Coffee Husk by Various Ionic Liquids.
ionic
liquids used at various experimental
temperatures |
||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
[DIPEA][Ac] |
[DIPEA][B] |
[DIPEA][O] |
[DIPEA][P] |
|||||||||
T (°C) | Mw | Mn | PDI | Mw | Mn | PDI | Mw | Mn | PDI | Mw | Mn | PDI |
80 | 2200 | 2111 | 1.04 | ND | ND | ND | 3068 | 2852 | 1.08 | 2527 | 2403 | 1.05 |
100 | 1641 | 1638 | 1.00 | ND | ND | ND | 2753 | 2362 | 1.16 | 2521 | 2389 | 1.06 |
120 | 1582 | 1581 | 1.00 | 5796 | 5093 | 1.14 | 2735 | 2273 | 1.20 | 2238 | 2124 | 1.05 |