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Erschienen in: Cellulose 4/2020

21.12.2019 | Original Research

Ultraviolet light enhanced sodium persulfate oxidation of cellulose to facilitate the preparation of cellulose nanofibers

verfasst von: Chunping Wang, Zhaoyang Yuan, An Wang, Jialei Qu, Zhen Fang, Yangbing Wen

Erschienen in: Cellulose | Ausgabe 4/2020

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Abstract

In this study, an oxidation process using the combination of sodium persulfate (SPS) and ultraviolet (UV) light was investigated to oxidize cellulose for enhancing the preparation of cellulose nanofibers from Kraft pulp. The results showed that the oxidation with SPS and UV could substantially reduce the degree of polymerization of cellulose and increase the carboxyl group content of the pulp fibers. Moreover, the oxidation with the combination of SPS and UV irradiation significantly increased the disruption of the fibers, evidenced by scanning electron microscopy images. In addition, the oxidation slightly increased the crystallinity of cellulose and confirmed the presence of cellulose type I in the oxidized cellulose. Following high-pressure homogenization, the cellulose nanofibrils (CNFs) from oxidized fibers showed smaller particle size compared to that of the control (without oxidation). The comparison of the mechanical/optical properties of the films prepared with different CNFs further demonstrated that the oxidation of cellulose with the combination of SPS and UV could improve the nanofibrillation process and enhance the fibril quality.

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Metadaten
Titel
Ultraviolet light enhanced sodium persulfate oxidation of cellulose to facilitate the preparation of cellulose nanofibers
verfasst von
Chunping Wang
Zhaoyang Yuan
An Wang
Jialei Qu
Zhen Fang
Yangbing Wen
Publikationsdatum
21.12.2019
Verlag
Springer Netherlands
Erschienen in
Cellulose / Ausgabe 4/2020
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-019-02941-9

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