Journal
CELLULOSE
Volume 27, Issue 11, Pages 6563-6576Publisher
SPRINGER
DOI: 10.1007/s10570-020-03236-0
Keywords
Component regulation; Superior mechanical strength; UV-blocking; Transparency and hazy; Poplar mechanical pulp
Funding
- National Natural Science Foundation of China [21703131, 31370578]
- Doctoral Scientific Research Foundation of Shaanxi University of Science and Technology [2016BJ-40]
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology [201821]
- Special Research Fund by Shaanxi Provincial Department of Education [18JK0122]
- Chinese Postdoctoral Science Foundation [2018M643707]
- Natural Science Basic Research Plan in Shaanxi Province of China [2019JQ-516]
- Guangxi Key Laboratory of Clean Pulp and Papermaking and Pollution Control, College of Light Industry and Food Engineering, Guangxi University [2019KF18, 2019KF33]
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The components of poplar mechanical pulp (PMP), including cellulose, hemicellulose, and lignin, were regulated through a drop-down synthesis method to prepare a series of mechanically superior raw, hemicellulose-containing (HNP), lignin-containing (LNP), and pure cellulose nanopaper (CNP). The effects of hemicellulose and lignin components on the transparency, haze, and mechanical properties were comprehensively investigated. Consequently, the resulting HNP and LNP combined high transparency (> 95%) and optical haze (> 76%) and possessed superior mechanical properties (182 and 148 MPa tensile strength). The residual lignin content (17.2-14.7 wt%) in LNP gave rise to efficient ultraviolet radiation blocking (similar to 100%) in the range of 200-320 nm. Moreover, HNP and LNP exhibited excellent flexibility and hydrophobicity and good thermal stability, which offered the potential for a wide range of applications in solar cells, light softening substrate, and light diffusers.
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