Preparation and Properties of Shear Thickening Fluid Reinforced High Foaming Ratio Waste Paper Buffer Material
ZHANG Bin1, TAO Wenxuan1, PEI Shuang1, REN Ziming1, PAN Zheng2, GOU Jinsheng1,*
1 Beijing Key Laboratory of Wood Science and Engineering, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China 2 Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, China
Abstract: With the rapid economic growth and continuous enhancement of people’s awareness of environmental protection, eco-friendly plant fiber-based foaming buffer materials have gradually become a research focus. In order to improve some drawbacks of plant fiber-based foaming buffer materials, including low foaming ratio, weak energy absorption, and so on, this study designed a semi-closed foaming mold and successfully prepared buffer materials with high foaming ratio and excellent energy absorption, and the preparation technology was optimized. The results indicated that the impurities in the waste paper are effectively removed, and the waste paper fibers can be modified without reducing the fiber length by using 0.5% sodium hydroxide solution, which is beneficial to improve the foaming ratio and comprehensive performance of waste paper foaming buffer materials. The optimal formula and the effect of the weight of the raw materials composition on the characteristics of waste paper foaming buffer materials were analyzed through the orthogonal test. The waste paper foaming buffer materials with a high foaming ratio were successfully prepared by a newly designed semi-closed foaming mold in this work. Its expansion ratio is increased by 3—4 times compared with the traditional method. This study first introduced shear thickening fluid (STF) as an enhancer to enhance the strength of waste paper fiber, and the influence of the content of STF on mechanical properties, foaming ratio, and the resilience performance of waste paper foaming buffering mate-rials were systematically investigated. And the reinforcement mechanism of STF on waste paper foaming buffering materials was also analyzed. The results reveal that the STF can enhance the strength of waste paper fibers and strengthen the connection between fibers, which can improve the energy absorption of the buffer materials. And with the increase of the STF content, the energy absorption of the buffer material gradually enhanced and the foaming ratio of the buffer materials gradually decreased. The comprehensive performance of STF-reinforced waste paper foaming buffer materials is optimal when the content of STF is 10%.
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2024, Vol. 38 
