数字印刷废纸纤维增强聚乳酸复合薄膜的性能研究

徐龙; 张效林; 常兴; 朱晓凤; 杨梦豪; 李欣; 高丽敏; 曹靖; 左栗源

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Study on Performance of Digital Printing Waste Paper Fiber-reinforced PLA Composite Films

Received:December 01, 2022 Revised:February 02, 2023

DOI：10.11981/j.issn.1000-6842.2024.01.130

Key Words:digital printing waste paper;PLA;composite films;mechanical properties;thermal stability

Fund Project:陕西省教育厅重点科技项目（协同创新专项20JY051）；陕西省科技厅重点研发计划项目（2021SF-448）。

Author Name	Affiliation	Postcode
XU Long	Faculty of Printing， Packing Engineering and Digital Media Technology， Xi’an University of Technology， Xi’an， Shaanxi Province， 710048	710048
ZHANG Xiaolin^*	Faculty of Printing， Packing Engineering and Digital Media Technology， Xi’an University of Technology， Xi’an， Shaanxi Province， 710048	710048
CHANG Xing	Faculty of Printing， Packing Engineering and Digital Media Technology， Xi’an University of Technology， Xi’an， Shaanxi Province， 710048	710048
ZHU Xiaofeng	Faculty of Printing， Packing Engineering and Digital Media Technology， Xi’an University of Technology， Xi’an， Shaanxi Province， 710048	710048
YANG Menghao	Faculty of Printing， Packing Engineering and Digital Media Technology， Xi’an University of Technology， Xi’an， Shaanxi Province， 710048	710048
LI Xin	Faculty of Printing， Packing Engineering and Digital Media Technology， Xi’an University of Technology， Xi’an， Shaanxi Province， 710048	710048
GAO Limin	Faculty of Printing， Packing Engineering and Digital Media Technology， Xi’an University of Technology， Xi’an， Shaanxi Province， 710048	710048
CAO Jing	Faculty of Printing， Packing Engineering and Digital Media Technology， Xi’an University of Technology， Xi’an， Shaanxi Province， 710048	710048
ZUO Liyuan	Faculty of Printing， Packing Engineering and Digital Media Technology， Xi’an University of Technology， Xi’an， Shaanxi Province， 710048	710048

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Abstract:

Waste paper fiber/PLA composite films were prepared from digital printing waste paper and polylactic acid （PLA） by melt blending and hot press molding. The effects of different waste paper fiber additions and different modifiers on the performance of composite films were investigated by adding silane coupling agents， including γ-glycidyl ether oxypropyltrimethoxysilane （KH560）， vinyltrimethoxysilane （A171）， isopropyltris（dioctylpyrophosphoryloxy）titanate （TMC201） and xylanase， respectively. The mechanical properties， opacity， chemical structure and thermal stability of composite films before and after modification were investigated. The results showed that the tensile strength of the composite films was the best when the mass fraction of waste paper fiber was 25%， reaching 21.6 MPa， which was 94.7% higher than that of the pure PLA film. The opacity of the waste paper fiber increased to 95.5% when the mass fraction of waste paper fiber was 20%. Moreover， the tensile strengths of the composite films were all improved to different degrees after the modified treatment of the waste paper fiber， among which the modification of KH560 was the best， with the tensile strength of the composite films （the mass fraction of waste paper fiber of 25%） reaching 24.7 MPa， an increase of 14.4% compared to the non-modified composite films. The modified treatment did not affect the opacity and thermal stability of the composite films.

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