Abstract
Aqueous-phase surface modification of nanocellulose is desirable because nanocellulose is generally produced via water-based fibrillation. In this study, a hydrogen bond–induced surface modification of cellulose nanofibrils (CNFs) in water was developed. Tannic acid and polyvinylpyrrolidone were chosen to modify the CNFs because of their strong capacity for hydrogen bond formation. By tuning the hydrogen bond formation between CNFs, tannic acid, and polyvinylpyrrolidone, CNFs with different surface hydrophilicity were achieved. The modified CNFs can assemble into strong and tough composites owing to the hydrogen bond network in the system. Modified CNFs demonstrated 76% higher tensile strength and 100% higher toughness than those of unmodified CNFs, reaching 162 MPa and 12.7 MJ/m3, respectively. This study provides a new water-based modification strategy for the nanocellulose, leading the way toward producing strong nanocellulose composites via noncovalent interaction.
| Original language | English |
|---|---|
| Pages (from-to) | 8127-8138 |
| Number of pages | 12 |
| Journal | Journal of Materials Science |
| Volume | 57 |
| Issue number | 17 |
| DOIs | |
| State | Published - May 2022 |
Funding
This research is sponsored by the US Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office, under contract DE-AC05-00OR22725 with UT-Battelle LLC. Scanning electron microscopy studies were completed at the Center for Nanophase Materials Sciences, a DOE Office of Science User Facility. The authors would like to thank Dr. Harry Meyer for his help on X-ray photoelectron spectroscopy measurement, and Rick R. Lowden for the access to mechanical testing. This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). This research is sponsored by the US Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office, under contract DE-AC05-00OR22725 with UT-Battelle LLC. Scanning electron microscopy studies were completed at the Center for Nanophase Materials Sciences, a DOE Office of Science User Facility. The authors would like to thank Dr. Harry Meyer for his help on X-ray photoelectron spectroscopy measurement, and Rick R. Lowden for the access to mechanical testing.
| Funders | Funder number |
|---|---|
| Center for Nanophase Materials Sciences | |
| U.S. Department of Energy | |
| Advanced Manufacturing Office | DE-AC05-00OR22725 |
| Office of Science | |
| Office of Energy Efficiency and Renewable Energy | |
| UT-Battelle |