温度、湿度和水分含量对模塑纤维制品机械性能的影响机理和规律研究

IF 20.2 Q1 MATERIALS SCIENCE, PAPER & WOOD
Zhiqiang Fu , Tong Zhao , Hu Wang , Jingyi Wei , Haozhe Liu , Liying Duan , Yan Wang , Ruixiang Yan
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引用次数: 0

摘要

温度、湿度和含水量(MC)的变化会导致模塑纤维制品(MFP)机械性能的变化。然而,很难将温度、湿度和 MC 对模塑纤维制品机械性能的影响解耦,也很难预测模塑纤维制品在使用过程中的机械性能。本研究研究了多功能纤维板的力学性能随环境温度、湿度和 MC 变化的规律和机理。结果表明,温度(20-70 °C)对多功能食品膜机械性能的直接影响不明显,多功能食品膜的机械性能主要受 MC 的影响。MC 与环境温度和湿度有关,三者之间的关系可以用改进的 Guggenheim-Anderson-de Boer(GAB)模型(20-70 °C,30 %-90 % 相对湿度)来描述。随着 MC 的增加,弹性模量和断裂应变呈线性增加和减少,屈服强度和破坏强度呈高斯-安普(Gauss-Amp)定律,破坏应变呈渐近回归分布定律。通过扫描电镜观察甘蔗渣模塑纤维制品的中观纤维结构,揭示了模塑纤维制品的两种断裂模式:脆性断裂和韧性断裂。小麦秸秆模塑纤维制品和废纸模塑纤维制品验证了数学模型和纤维结构的变化。这项研究有助于了解温度、湿度和 MC 的变化对 MFP 机械性能的影响和机理。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study on the mechanism and law of temperature, humidity and moisture content on the mechanical properties of molded fiber products

The change of temperature, humidity and moisture content (MC) will lead to the change of mechanical properties of molded fiber products (MFP). However, it is difficult to decouple the effects of temperature, humidity and MC on the mechanical properties of MFP, and predict the mechanical properties of MFP during the use. In this study, the laws and mechanism of mechanical properties of MFP with ambient temperature, humidity and MC were studied. The results showed that the direct effect of temperature (20−70 °C) on mechanical properties of MFP was insignificant, and the mechanical properties of MFP were mainly changed by MC. The MC was related to ambient temperature and humidity, and the relationship between the three could be described by the modified Guggenheim-Anderson-de Boer (GAB) model (20−70 °C and 30 %–90 % relative humidity). With the increase of MC, the elastic modulus and fracture strain was increased and decreased linearly, the yield strength and failure strength were presented GaussAmp laws, and the failure strain was presented asymptotic regressed distribution law. Two fracture modes of MFP, brittle fracture and ductile fracture, were revealed by the scanning electron microscopy of the mesoscopic fiber structure of sugarcane bagasse molded fiber products. The mathematical models and the changes of fiber structure were verified by wheat straw molded fiber products and waste paper molded fiber products. This study was contributed to understand the effects and mechanism of the change of temperature, humidity and MC on the mechanical properties of MFP.

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来源期刊
Journal of Bioresources and Bioproducts
Journal of Bioresources and Bioproducts Agricultural and Biological Sciences-Forestry
CiteScore
39.30
自引率
0.00%
发文量
38
审稿时长
12 weeks
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