摘要
随着经济的快速增长和人们环保意识的不断增强,植物纤维类环保型发泡缓冲材料逐渐成为研究热点。为改善植物纤维发泡材料发泡率低、缓冲吸能效果差等问题,本研究设计半密闭型发泡模具,成功制备了具有高发泡率和优异吸能性的废纸缓冲材料并对制备工艺进行了优化。结果表明:使用质量分数为0.5%的氢氧化钠溶液预处理废纸浆,不仅可以有效去除废纸中的杂质,而且能在不降低纤维长度的情况下对废纸纤维进行适当改性,有利于提高废纸缓冲材料的发泡率和整体性能。以正交优化试验研究原料配比对废纸缓冲材料性能的影响,并据此确定了最优配方。通过设计全新半密闭型发泡模具,成功制备高发泡率的废纸缓冲材料,其膨胀率相较传统制备方式提高了3~4倍。本研究首次引入剪切增稠液(STF)增强废纸纤维,考察了STF含量对废纸缓冲材料力学性能、发泡倍率和回弹性能的影响,分析了STF对废纸缓冲材料的增强机理。结果表明:STF能够提高单根废纸纤维的强度并增强纤维之间的连结,从而提升缓冲材料吸能性,且随着STF含量的增加,材料的吸能性逐渐增强,发泡率逐渐降低,当STF含量为10%(质量分数,下同)时,STF增强废纸缓冲材料的综合性能达到最优。
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%.
作者
张斌
陶文轩
裴爽
任子铭
潘政
苟进胜
ZHANG Bin;TAO Wenxuan;PEI Shuang;REN Ziming;PAN Zheng;GOU Jinsheng(Beijing Key Laboratory of Wood Science and Engineering,College of Materials Science and Technology,Beijing Forestry University,Beijing 100083,China;Institute of Chemical Industry of Forest Products,Chinese Academy of Forestry,Nanjing 210042,China)
出处
《材料导报》
EI
CSCD
北大核心
2024年第1期278-287,共10页
Materials Reports
基金
国家自然科学基金(32271819)。
关键词
废纸纤维
剪切增稠液
缓冲包装材料
高发泡率
waste paper fiber
shear thickening fluid
buffer packaging material
high foaming ratio
