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| Influence of Degree of Polymerization of Wood Fiber on Mechanical Properties of Cellulose Films with High Transmittance |
| Received:December 25, 2021 |
| DOI：10.11981/j.issn.1000-6842.2023.01.01 |
| Key Words:wood fibers;degree of polymerization;cellulose film;mechanical properties |
| Fund Project:国家自然科学面上基金（21978103）；国家自然科学青年基金（31700508）；广东省自然科学基金（2020B1515020021）。 |
| Author Name | Affiliation | Postcode | | LI Yujie* | State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 | 510640 | | LI Guanhui | State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 | 510640 | | HOU Gaoyuan | State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 | 510640 | | HU Zhaoxiang | State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 | 510640 | | ZHANG Dejian | State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 | 510640 | | FANG Zhiqiang | State Key Lab of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 | 510640 |
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| Abstract: |
| Soft wood pulp with high degree of polymerization （DP） were first prepared by sodium hydroxide-sulfite-anthraquinone-methanol （ASAM） pulping， and the DP of wood fibers was then regulated by controlling bleaching time and the dosage of bleaching agent， thereby obtaining four types of wood fibers with different DPs and similar morphology. After that， carboxymethyl cellulose （CMC） was compounded with papers made from wood fibers with different DPs to prepare highly transparent wood fiber/CMC films （hereinafter， films） by impregnation and the effect of cellulose DP on mechanical properties of the films were studied as well. The results showed that higher DP led to stronger mechanical properties， e.g.， tensile strength， toughness， folding endurance， tear index， burst index， of the films when wood fibers had negligible changes in fiber morphology and crystallinity. Meanwhile， a slight change in optical properties was observed with the transmittance and haze in the range of 87.9%~89.8% and 53.6%~64.1%， respectively. |
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