Production of lignin-containing cellulose nanofibers using deep eutectic solvents for UV-absorbing polymer reinforcement

Chaozheng Liu; Mei-Chun Li; Weimin Chen; Runzhou Huang; Shu Hong; Qinglin Wu; Changtong Mei

doi:10.1016/j.carbpol.2020.116548

Production of lignin-containing cellulose nanofibers using deep eutectic solvents for UV-absorbing polymer reinforcement

Carbohydr Polym. 2020 Oct 15:246:116548. doi: 10.1016/j.carbpol.2020.116548. Epub 2020 Jun 6.

Authors

Chaozheng Liu¹, Mei-Chun Li², Weimin Chen³, Runzhou Huang³, Shu Hong³, Qinglin Wu⁴, Changtong Mei⁵

Affiliations

¹ Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037 China; School of Renewable Natural Resources, Louisiana State University Agricultural Center, Baton Rouge, USA.
² Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037 China. Electronic address: mli@njfu.edu.cn.
³ Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037 China.
⁴ School of Renewable Natural Resources, Louisiana State University Agricultural Center, Baton Rouge, USA.
⁵ Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037 China. Electronic address: mei@njfu.edu.cn.

PMID: 32747235
DOI: 10.1016/j.carbpol.2020.116548

Abstract

Lignin-containing cellulose nanofibers (LCNFs) from energy cane bagasse (ECB), were prepared using microwave assisted deep eutectic solvent (MV-DES) treatment in combination with ultrasonication. The yield of lignocellulose is up to 45.2 % with 81.0 % delignification under the optimal reaction condition (110 ℃, 30 min). The resulting LCNF exhibited a highly entangled network, which was caused by the binder role of lignin between cellulose nanofibers. The addition of LCNFs improved the stability of the polyanionic cellulose (PAC) film-forming suspension, which was confirmed by the increased zeta potential and viscosity values. The LCNF / PAC films showed tunable mechanical and UV-resistant properties, depending on the amount and type of LCNFs. PAC films with the addition of 5 % LCNFs (PEF-5 %) showed good mechanical properties (a tensile strength of 55.8 MPa with a 26.3 % strain to break) and high UV protection ability (a UV-transmittance of 2.9 %).

Keywords: Deep eutectic solvent; Lignin-containing nanocellulose; Microwave; Reinforcement; UV protection film.

MeSH terms

Cellulose / chemistry
Lignin / chemical synthesis*
Microwaves
Nanofibers / chemistry*
Physical Phenomena
Polyelectrolytes / chemistry
Solvents / chemistry*
Tensile Strength
Ultrasonic Waves
Ultraviolet Rays*
Viscosity

Substances

Polyelectrolytes
Solvents
polyanions
lignocellulose
Cellulose
Lignin
bagasse