Dept. of Food, Bioprocessing, and Nutrition Sciences, North Carolina State Univ., Raleigh, NC, USA.
J Food Sci. 2011 Jan-Feb;76(1):E2-14. doi: 10.1111/j.1750-3841.2010.01919.x. Epub 2010 Dec 1.
The nonbiodegradable and nonrenewable nature of plastic packaging has led to a renewed interest in packaging materials based on bio-nanocomposites (biopolymer matrix reinforced with nanoparticles such as layered silicates). One of the reasons for unique properties of bio-nanocomposites is the difference in physics at nanoscale as compared to that at macroscale. Therefore, the effect of nanoscale on the properties of bio-nanocomposites is discussed. Properties of bio-nanocomposites are governed by the extent of dispersion of nanoparticles in the biopolymer matrix and interaction between nanoparticles and the biopolymer. Selection of proper technique to determine properties of these bio-nanocomposites is very critical in assessing their performance. Experimental techniques (tensile testing, barrier property measurement, dynamic mechanical analysis, differential scanning calorimetry, thermogravimetric analysis, rheological measurement) to determine the mechanical, barrier, thermal, and rheological properties of bio-nanocomposites are discussed in terms of methodology, interpretation of results, and application in studying the properties of bio-nanocomposites. Mathematical modeling plays an important role in predicting the properties of bio-nanocomposites and comparing them to the measured properties. This comparison helps in better understanding the mechanism for much improved properties of bio-nanocomposites. Mathematical modeling is also helpful in understanding the effects of different parameters on the properties of bio-nanocomposites. Therefore, the article describes mathematical modeling of mechanical and barrier properties of bio-nanocomposites using analytical micromechanics.
塑料包装不可生物降解且不可再生，这促使人们重新关注基于生物纳米复合材料（生物聚合物基质中加入纳米颗粒如层状硅酸盐增强）的包装材料。生物纳米复合材料具有独特性能的原因之一是纳米尺度的物理性质与宏观尺度的物理性质不同。因此，本文讨论了纳米尺度对生物纳米复合材料性能的影响。生物纳米复合材料的性能取决于纳米颗粒在生物聚合物基质中的分散程度以及纳米颗粒与生物聚合物之间的相互作用。选择适当的技术来确定这些生物纳米复合材料的性能对于评估其性能非常关键。本文讨论了用于确定生物纳米复合材料的机械性能、阻隔性能、热性能和流变性能的实验技术（拉伸试验、阻隔性能测量、动态力学分析、差示扫描量热法、热重分析、流变测量），包括方法学、结果解释以及在研究生物纳米复合材料性能方面的应用。数学建模在预测生物纳米复合材料的性能并将其与测量的性能进行比较方面起着重要作用。这种比较有助于更好地理解生物纳米复合材料性能得到极大改善的机制。数学建模还有助于理解不同参数对生物纳米复合材料性能的影响。因此，本文描述了使用分析细观力学对生物纳米复合材料的机械性能和阻隔性能进行数学建模。
