| Full text | |
| Author(s): |
Pin, Thaynara C.
[1, 2]
;
Brenelli, Livia B.
[3]
;
Nascimento, Viviane M.
[1, 4]
;
Costa, Aline C.
[1]
;
Pu, Yunqiao
[5]
;
Ragauskas, Arthur J.
[2, 5, 6]
;
Rabelo, Sarita C.
[7]
Total Authors: 7
|
| Affiliation: | [1] Univ Campinas UNICAMP, Sch Chem Engn, Ave Albert Einstein, BR-13083852 Campinas, SP - Brazil
[2] Univ Tennessee, Dept Chem & Biomol Engn, Middle Dr, Knoxville, TN 37916 - USA
[3] Univ Campinas UNICAMP, Interdisciplinary Ctr Energy Planning NIPE, R Cora Coralina, BR-13083896 Campinas, SP - Brazil
[4] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Biorenewables Natl Lab LNBR, R Giuseppe Maximo Scolfaro, BR-13083970 Campinas, SP - Brazil
[5] Oak Ridge Natl Lab ORNL, Joint Inst Biol Sci, Biosci Div, Bethel Valley Rd, Oak Ridge, TN 37831 - USA
[6] Univ Tennessee, Dept Forestry Wildlife & Fisheries, Ctr Renewable Carbon, Inst Agr, Morgan Cir Dr, Knoxville, TN 37996 - USA
[7] Sao Paulo State Univ UNESP, Coll Agr Sci, Dept Bioproc & Biotechnol, Ave Univ, BR-18610034 Botucatu, SP - Brazil
Total Affiliations: 7
|
| Document type: | Journal article |
| Source: | INDUSTRIAL CROPS AND PRODUCTS; v. 159, JAN 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
The mechanisms behind lignin dissolution with protic ionic liquids (PILs) and their influence over lignin properties remain not fully explored. In this work, physicochemical and structural features of lignins extracted from sugarcane bagasse after pretreatment with a series of PILs (length of the cation chain combined with different anions) were assessed using analytical techniques. It was found that the lignin extracted with shorter chain length cations PILs showed the highest beta-O-4 content. Opposite, the increase of the PILs cation chain length resulted in enhanced depolymerization. All lignins presented high polydispersity (>3.7), while the weight average molecular ranged from 1921 to 13,539 g/mol. The recovered {[}Eti]{[}Mal] lignin presented the higher beta-O-4 content and was possibly the most preserved lignin obtained. Opposite, lignin isolated from {[}Hex]{[}Ac] and {[}Hex]{[}For] treatments had less beta-O-4 linkages attributed to the depolymerization of lignin via rupture of ether linkages generating intermediates that further repolymerized and/or depolymerized. These results suggest that the ionicity of the PIL is a crucial factor for lignin dissolution. Furthermore, these results illustrate that the proposed pretreatment using different PILs is useful to obtain high-quality lignins with distinct features and opens a new perspective for materials to match various applications. (AU) | |
| FAPESP's process: | 17/15477-8 - Development of a low severity pretreatment process for the production of sugarcane straw oligosaccharides |
| Grantee: | Lívia Beatriz Brenelli de Paiva |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 15/20630-4 - Biorefinery development integrated to a bioethanol sugar cane plant with zero CO2 emission: routes to convert renewable resources to bio-products and bio-electricity |
| Grantee: | Rubens Maciel Filho |
| Support Opportunities: | Research Projects - Thematic Grants |