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A novel chitosan/wheat gluten biofoam fabricated by spontaneous mixing and vacuum-drying

机译：通过自发混合和真空干燥制造的新型壳聚糖/小麦麸质生物涂料

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摘要

A new type of chitosan and wheat gluten biofoam is presented. The pore structure achieved relied solely on the specific mixing and phase distribution when a film was cast from an aqueous mixture of chitosan/wheat gluten solution, in the absence of any chemical blowing agent, porogen or expanding gas. The foam was obtained when the liquid phase was removed by vacuum drying, without the need for the traditional freeze-drying that is frequently used for pore formation. Soft foam samples could be prepared with stiffnesses from 0.3 to 1.2 MPa and a high rebound resilience (64 and 94% at compressive strains of 80 and 20%, respectively). The foams were relatively ductile and did not require any plasticiser to allow for in-plane deformation (20% compression) and smaller bending. Only open pores with sizes of the order of 70–80 μm were observed by microscopy. The density of all the foams was ～50 kg m ~(?3) , due to the high porosity (96% air). The foams showed a rapid and large uptake of both non-polar (limonene) and polar (water) liquids. When immersed in these liquids for 1 second, the maximum uptake recorded was 40 times the initial mass of the foam for limonene and 8 times for water.
机译：提出了一种新型的壳聚糖和小麦麸质生物涂鸦。在没有任何化学发泡剂，孔胶或膨胀气体的情况下，当从壳聚糖/小麦蛋白蛋白筋溶液的含水混合物中浇铸薄膜时，所达到的孔结构仅依赖于特定的混合和相分布。当通过真空干燥除去液相时，获得泡沫，而不需要经常用于孔形成的传统冷冻干燥。可以用0.3至1.2MPa的刚度和高回弹弹性（分别为80％和20％的压缩菌株64和94％）的刚度制备软泡沫样品。泡沫是相对延展性的，并且不需要任何增塑剂允许面内变形（20％的压缩）和更小的弯曲。仅通过显微镜观察到具有70-80μm的尺寸的尺寸的开口孔隙。由于高孔隙率（96％空气），所有泡沫的密度为约〜50kg m〜（？3）。泡沫显示出快速而大的非极性（柠檬烯）和极性（水）液体吸收。当浸入这些液体1秒时，记录的最大摄取为柠檬烯泡沫末端的40倍，水为8次。

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