具有调湿功能的复合蜂窝纸板的制备与性能研究

发布时间：2018-04-21 13:08

本文选题：魔芋葡甘聚糖 + 蜂窝纸板　；参考：《浙江理工大学》2017年硕士论文

【摘要】：随着社会的发展,在我们生活中各类产品的流通越来越频繁,蜂窝纸板在运输过程中起着重要的作用。蜂窝纸板是一种结构新颖、质轻价廉、承载和缓冲性能优异的绿色包装材料。在制造、存储和使用过程中由于纸质包装材料本身固有的吸湿性,对环境湿度十分敏感,受环境因素影响大。我国大部分南方地区年平均相对湿度在70%RH到80%RH,有时高达90%RH。因此,研究蜂窝纸板防潮性能具有很大的意义。大量实验结果表明,纸板在环境相对湿度为40%RH-50%RH时力学性能最佳。传统防潮方法对纸板湿度影响的单向调节,难以使纸板始终保持良好的性能,调湿材料则可以实现湿度的双向调节。将调湿材料与蜂窝纸板复合,制备具有双向湿度调节功能的复合蜂窝纸板,不仅解决了蜂窝纸板受潮问题,还能解决纸板过于干燥,变脆问题。本文以丙烯酸-丙烯酸钠-丙烯酰胺共聚物为吸放湿材料,魔芋葡甘聚糖(KGM)为调湿引导材料和成膜剂,以微波发泡方法原位发泡方式制备发泡调湿复合材料,再与蜂窝纸板复合制备具有调湿功能的复合蜂窝纸板。研究了微波发泡功率、丙烯酸-丙烯酸钠与丙烯酰胺质量之比和发泡调湿复合材料的含水量等因素对发泡调湿复合材料发泡性能和调湿性能的影响,然后研究了具有调湿功能的复合蜂窝纸板的缓冲性能和调湿性能,最后研究高湿度、低湿度及适宜湿度环境下调湿复合蜂窝纸板的缓冲性能,验证调湿复合蜂窝纸板的湿度调节功能。主要结果如下:(1)发泡调湿复合材料的最佳发泡倍率为6.5倍,泡孔均匀,具有开孔与闭孔,孔穴表面具有圆形坑状孔穴,可实现物理吸附水,使得该发泡材料吸/放湿的作用增强。(2)发泡调湿复合材料的制备及性能影响因素研究:随着微波功率的增加,发泡倍率越大,泡孔越大,可实现物理吸附水的量也越大,其吸放湿率越高,调湿性能也越好。随着丙烯酸-丙烯酸钠与丙烯酰胺质量之比的减小,发泡倍率越大吸放湿率越小,调湿性能下降。随着水含量的增加,发泡倍率越大,泡孔越大,吸放湿率越高,调湿性能越好。(3)具有调湿功能的复合蜂窝纸板的缓冲性能与调湿性能研究:调湿复合蜂窝纸板可主动调节内环境湿度,将内环境湿度保持在50±5%RH,可以有效解决了蜂窝纸板力学性能受湿度影响带来的问题。三种湿度状态下:30%RH、50%RH及80%RH的调湿复合蜂窝纸板的缓冲性能均优于传统蜂窝纸板,说明调湿功能的复合蜂窝纸板不仅能够调节湿度,原位填充后的调湿复合蜂窝纸板的平台应力、吸收能量等各项参数都有所提升。50%RH湿度下的传统蜂窝纸板与调湿功能的复合蜂窝纸板的各项性能优于30%RH与80%RH湿度下的各项性能。具有调湿功能的复合蜂窝纸板不仅克服了传统蜂窝纸板性能受湿度影响大的缺陷,还显著降低初始峰值应力,极大地提高了平台应力和能量吸收能力,具有更大的应用前景。
[Abstract]:With the development of society, the circulation of all kinds of products is becoming more and more frequent in our life. Honeycomb paperboard plays an important role in the transportation process. Honeycomb paperboard is a kind of green packaging material with novel structure, light weight and low price, excellent bearing capacity and cushioning performance. Due to the inherent hygroscopicity of paper packaging materials in manufacturing, storage and use, they are sensitive to environmental humidity and greatly affected by environmental factors. The average annual relative humidity in most southern regions of China ranges from 70%RH to 80 RHs, sometimes as high as 90 RHs. Therefore, it is of great significance to study the moisture-proof property of honeycomb paperboard. A large number of experimental results show that the mechanical properties of paperboard are the best when the environmental relative humidity is 40%RH-50%RH. It is difficult to keep good performance of paperboard by unidirectional adjustment of the influence of traditional moisture-proof method on the humidity of paperboard, while moisture adjusting material can realize bidirectional adjustment of humidity. Compound honeycomb paperboard with humidifying material and honeycomb board is prepared, which can not only solve the moisture problem of honeycomb paperboard, but also solve the problem of too dry and brittle paperboard. In this paper, using acrylic acid-sodium acrylate acrylamide copolymer as moisture absorbent material, konjac glucomannan (KGM) as humidifying guide material and film forming agent, foaming and humidifying composites were prepared by microwave foaming in situ. The composite honeycomb paperboard with humidification function is prepared by recombination with honeycomb board. The effects of microwave foaming power, mass ratio of acrylic acid-sodium acrylate to acrylamide and moisture content of foaming and humidifying composites on foaming and humidifying properties of foaming and humidifying composites were studied. Then the cushioning performance and humidification performance of the compound honeycomb paperboard with the function of humidification were studied. Finally, the cushioning performance of the humidified composite honeycomb paperboard with high humidity, low humidity and suitable humidity was studied. Verify the humidity adjustment function of humidified composite honeycomb paperboard. The main results are as follows: (1) the optimum foaming ratio of foaming and humidifying composite is 6.5 times, the bubble pore is uniform, there are open and closed pores, and the surface of the cavity has circular pits, which can achieve physical adsorption of water. The preparation of foaming and humidifying composite and its influencing factors are as follows: with the increase of microwave power, the bigger the foaming ratio and the bigger the bubble pore, the larger the amount of physical water absorption can be realized. The higher the moisture absorption and desorption rate, the better the moisture regulation performance. With the decrease of the mass ratio of acrylic acid to sodium acrylate to acrylamide, the bigger the foaming ratio is, the smaller the moisture absorption and desorption rate is, and the moisture regulating performance decreases. With the increase of water content, the greater the foaming ratio, the larger the bubble pore, the higher the moisture absorption and desorption rate. Study on the cushioning performance and humidity Adjustment performance of Composite Honeycomb Paperboard with Moisturizing function: humidifying compound Honeycomb Board can actively adjust the humidity of the inner environment, Keeping the humidity of the inner environment at 50 卤5 RH can effectively solve the problem that the mechanical properties of honeycomb paperboard are affected by humidity. Under three kinds of humidity, the cushioning performance of the humidified honeycomb board of RH 50 and 80%RH is superior to that of the traditional honeycomb paperboard, which shows that the humidifying function of the compound honeycomb paperboard can not only adjust the humidity, but also the platform stress of the humidified composite honeycomb board after in-situ filling. The properties of traditional honeycomb paperboard and compound honeycomb board with humidification function were better than those of 30%RH and 80%RH humidity. The compound honeycomb paperboard with the function of humidification not only overcomes the shortcoming that the performance of the traditional honeycomb paperboard is greatly affected by humidity, but also remarkably reduces the initial peak stress, greatly improves the platform stress and energy absorption ability, and has a greater application prospect.
【学位授予单位】：浙江理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TB33

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