纖維多孔緩沖包裝材料泡孔參數(shù)與其力學(xué)性能的關(guān)系
[Abstract]:[objective] to investigate the relationship between cellular parameters (porosity, pore size and distribution) and mechanical properties of fiber porous cushioning packaging materials by means of appropriate characterization of cellular parameters. It provides a theoretical basis for the preparation of fiber porous cushioning packaging materials with excellent properties, and provides a reference for further studying and revealing the foaming mechanism of fiber porous cushioning packaging materials. In order to promote the development of green and environmentally friendly cushioning packaging materials, the foamed materials with different pore structures were prepared by hot pressing with wood flour and waste corrugated pulp as the main raw materials, at the same time adding the excipients such as blowing agent and so on, and the foamed materials with different pore structures were prepared by hot pressing molding. The microscopic images of the materials were processed and analyzed by using Image Pro Plus 6.0image processing software, and the bubble structure parameters of different materials were obtained, that is, porosity, pore size and distribution. The stress-strain curve, the buffer coefficient-stress curve, the average resilience curve and the unit volume deformation energy curve of the material are obtained by static compression test and 4 times compression rebound test, and the stress-strain curve, buffer coefficient-stress curve, average resilience curve and unit volume deformation energy curve are obtained. The relationship between cellular structure parameters and mechanical properties of materials is analyzed. [results] different cellular parameters have different relations with mechanical properties of materials, and the relationship between porosity and mechanical properties of materials is as follows: the larger the porosity is, the higher the porosity is. The slower the stress-strain curve is, the smaller the minimum buffer coefficient is, and the smaller the deformation energy per unit volume is. With the increase of porosity, the average springback of the material first increased and then decreased. The relationship between the size and distribution of pore size and the mechanical properties of the material is as follows: the larger the area percentage of the foams, the smaller the stress value and the minimum buffer coefficient of the material under the same strain condition; The smaller the percentage of the bubble area is, the more uniform the pore size distribution is, the higher the average rebound rate of the material is and the larger the deformation energy per unit volume. [conclusion] through appropriate characterization of cell parameters and experimental and statistical methods, The micro-cellular structure parameters (porosity, pore size and distribution) of fiber porous cushioning packaging materials were characterized, and the important theoretical relationship between micro-porous packaging materials and mechanical properties of different pore-structure materials was obtained by combining macro-and micro-structure. It is of great significance to further study the microstructure of fiber porous cushioning packaging materials, to optimize the morphology and uniformity of the foams, and even to produce them in the future.
【作者單位】: 東北林業(yè)大學(xué)工程技術(shù)學(xué)院;
【基金】:中央高校基本科研業(yè)務(wù)費專項(2572016AB25);中央高;究蒲袠I(yè)務(wù)費專項(2572014CB09) 國家林業(yè)公益行業(yè)科研專項(201304506)
【分類號】:TB484
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