Millions of tons of malt sprouts, a low added-value by-product of the brewing industry, are produced after barley malting (germination of sprouting). Their valorisation can rise from their use for the development of bioplastics whose main source can be found in different wastes and by-products of the food industry, being an abundant, inexpensive and renewable resource available. The objective of this study is the development of bio-based, biodegradable bioplastics from malt sprout (MS), whose chemical composition accounts for great amounts of both proteins and starches. Different formulations (malt sprout/plasticizer ratios) were studied to determine the suitability of injection moulding processing, where the effect of injection pressure was evaluated. The mechanical properties of the bioplastics were evaluated by dynamic mechanical analysis (DMA) and tensile tests and some functional properties such as water uptake capacity (WUC) and soluble matter loss were also studied. Finally, the obtained properties were related to the bioplastics structure that was analysed via scanning electron microscopy. The tests carried out evidenced a clear dependence between mechanical properties and WUC of MS/plasticizer ratio and injection pressure, increasing the storage modulus (E’) from 0.94 MPa for 1:1 MS/plasticizer ratio processed at 500 bar to 1.42 and 4.30 MPa for 3:1 MS/plasticizer ratio processed at 500 and 900 bar, respectively. Moreover, the WUC increased from 232 ± 32 % for 1:1 MS/plasticizer ratio processed at 500 bar to 319 ± 33 and 412 ± 79 % for 3:1 MS/plasticizer ratio processed at 500 and 900 bar, respectively.

大麦制麦芽（发芽发芽）后，产生了数百万吨的麦芽芽，这是酿造业的一种低附加值产品。它们用于开发生物塑料的价值可以提高其价值，生物塑料的主要来源可以在食品工业的各种废物和副产品中找到，这是一种丰富，廉价且可再生的资源。这项研究的目的是从麦芽（MS）开发生物基，可生物降解的生物塑料，其化学成分占蛋白质和淀粉的大量含量。研究了不同的配方（麦芽/增塑剂比例），以确定注射成型工艺的适用性，并在其中评估了注射压力的影响。通过动态力学分析（DMA）和拉伸试验评估了生物塑料的力学性能，并研究了一些功能特性，例如吸水量（WUC）和可溶性物质损失。最后，获得的性质与所分析的生物塑料结构有关通过扫描电子显微镜。进行的测试表明，机械性能与MS /增塑剂比和注射压力的WUC之间存在明显的相关性，将500 bar下加工的1：1 MS /增塑剂比的储能模量（E'）从0.94 MPa增加到1.42和4.30 MPa 3：1的MS /增塑剂比例分别在500和900 bar下处理。此外，WUC分别从在500 bar下处理的1：1 MS /增塑剂比率的232±32％增至在500 bar和900 bar下处理的3：1 MS /增塑剂比率的319±33和412±79％。