|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Agriculture / Faculty of Agriculture >
Peer-reviewed Journal Articles, etc >
Determination of the absolute molar mass of acetylated eucalyptus kraft lignin by two types of size-exclusion chromatography combined with multi-angle laser light-scattering detectors
| Title: | Determination of the absolute molar mass of acetylated eucalyptus kraft lignin by two types of size-exclusion chromatography combined with multi-angle laser light-scattering detectors |
| Authors: | Wang, Linping Browse this author | | Uraki, Yasumitsu Browse this author →KAKEN DB | | Koda, Keiichi Browse this author →KAKEN DB | | Gele, Aori Browse this author | | Zhou, Xuesong Browse this author | | Chen, Fangeng Browse this author |
| Keywords: | absolute molar mass | | acetylated hardwood kraft lignin | | fractionation | | multi-angle laser light scattering (MALLS) |
| Issue Date: | 24-Apr-2019 |
| Publisher: | Walter de Gruyter |
| Journal Title: | Holzforschung |
| Volume: | 73 |
| Issue: | 4 |
| Start Page: | 363 |
| End Page: | 369 |
| Publisher DOI: | 10.1515/hf-2018-0119 |
| Abstract: | The molar mass (MM) and polydispersity indices (PDI) of acetylated hardwood kraft lignin (Ac-HWKL) and Ac-HWKL fractions were measured by size-exclusion chromatography with multi-angle laser light scattering (SEC-MALLS). The detectors worked at LL₆₅₈ ₙₘ and LL₇₈₅ₙₘ. The MM of Ac-HWKL measured at 785 nm was much smaller than that measured at 658 nm. The number-average (Mn) and weight-average (Mw) molar masses of Ac-HWKL determined at 785 nm were approximately 6.2 and 6.5 times larger, respectively, than the values estimated using a conventional calibration curve created with authentic polystyrene standards in tetrahydrofuran (THF). Based on the Mw of Ac-HWKL fractions, the Mark-Houwink-Sakurada equation for Ac-HWKL was established to be [η]/ml g⁻¹ = 0.320 M⁰∙²⁴ in THF and [η]/ml g⁻¹ = 0.142 M⁰∙²⁶ in dimethyl sulfoxide (DMSO). These results demonstrate that Ac-HWKL has a more compact structure in an organic solvent than polystyrene. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/77655 |
| Appears in Collections: | 農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 浦木 康光
|
