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首页> 美国卫生研究院文献>Polymers >Gas Dissolution Foaming as a Novel Approach for the Production of Lightweight Biocomposites of PHB/Natural Fibre Fabrics
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Gas Dissolution Foaming as a Novel Approach for the Production of Lightweight Biocomposites of PHB/Natural Fibre Fabrics

机译：气体溶解发泡是生产轻质PHB /天然纤维织物生物复合材料的新方法

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The aim of this study is to propose and explore a novel approach for the production of cellular lightweight natural fibre, nonwoven, fabric-reinforced biocomposites by means of gas dissolution foaming from composite precursors of polyhydroxybutyrate-based matrix and flax fabric reinforcement. The main challenge is the development of a regular cellular structure in the polymeric matrix to reach a weight reduction while keeping a good fibre-matrix stress transfer and adhesion. The viability of the process is evaluated through the analysis of the cellular structure and morphology of the composites. The effect of matrix modification, nonwoven treatment, expansion temperature, and expansion pressure on the density and cellular structure of the cellular composites is evaluated. It was found that the nonwoven fabric plays a key role in the formation of a uniform cellular morphology, although limiting the maximum expansion ratio of the composites. Cellular composites with a significant reduction of weight (relative densities in the range 0.4–0.5) were successfully obtained.
机译：这项研究的目的是提出和探索一种新颖的方法，该方法可通过基于聚羟基丁酸酯基基质和亚麻织物增强材料的复合前体的气体溶解发泡来生产蜂窝状轻质天然纤维，非织造，织物增强的生物复合材料。主要挑战是在聚合物基质中发展规则的蜂窝状结构，以减轻重量，同时保持良好的纤维基质应力转移和粘附力。该过程的可行性是通过分析复合材料的孔结构和形态来评估的。评估了基质改性，非织造布处理，膨胀温度和膨胀压力对多孔复合材料的密度和多孔结构的影响。已经发现，尽管限制了复合材料的最大膨胀率，但非织造织物在形成均匀的细胞形态方面起着关键作用。成功获得了重量显着降低（相对密度在0.4-0.5范围内）的多孔复合材料。

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