Polyvinyl alcohol is used to 3D print (fused deposition modelling) sampling matrices for bacterial detection. A specific configuration was designed using Computer-Aided Design software. The mechanical properties of the printed samples were studied using uniaxial tensile testing, and compared to those of the original Polyvinyl alcohol filament, with and without heat treatment. The effects of different factors such as UV treatment, printing speed, infill density and printing direction on the mechanical properties of the printed samples including strength, strain and modulus of elasticity were studied. The results show that the effect of the fused deposition modelling process on the mechanical properties of the printed Polyvinyl alcohol cannot be explained by its exposure to heat. UV treatment reduced the strength, characteristic strains and Young's modulus. It makes Polyvinyl alcohol samples brittle. The effects of printing speed and the infill density on the mechanical properties of printed samples can be no linear. An unexpected relation between printing direction and mechanical properties was demonstrated by the studied specimens that needs further theoretical understanding. There is a huge scatter in strength of PVA samples compared with typical engineering materials, and in the fracture strain of original PVA filament, the 3D printing process can reduce the scatter but only by a limited extent. To summarise, there is a sophisticated relation between printing parameters and the mechanical properties of the printed Polyvinyl alcohol.

聚乙烯醇用于3D打印（熔融沉积建模）采样矩阵以进行细菌检测。使用计算机辅助设计软件设计了特定的配置。使用单轴拉伸试验研究了印刷样品的机械性能，并与经过热处理和未经热处理的原始聚乙烯醇长丝进行了比较。研究了诸如紫外线处理，印刷速度，填充密度和印刷方向等因素对印刷样品的机械性能（包括强度，应变和弹性模量）的影响。结果表明，熔融沉积建模过程对印刷的聚乙烯醇的机械性能的影响无法通过其暴露于热来解释。紫外线处理会降低强度，特征应变和杨氏模量。它会使聚乙烯醇样品变脆。印刷速度和填充密度对印刷样品的机械性能的影响可能不是线性的。研究样品证明了印刷方向和机械性能之间的出乎意料的关系，需要进一步的理论理解。与典型的工程材料相比，PVA样品的强度有很大的分散，并且在原始PVA丝的断裂应变中，3D打印过程可以减少分散，但程度有限。总而言之，在印刷参数和印刷的聚乙烯醇的机械性能之间存在复杂的关系。印刷速度和填充密度对印刷样品的机械性能的影响可能不是线性的。研究样品证明了印刷方向和机械性能之间的出乎意料的关系，需要进一步的理论理解。与典型的工程材料相比，PVA样品的强度有很大的分散，并且在原始PVA丝的断裂应变中，3D打印过程可以减少分散，但程度有限。总而言之，在印刷参数和印刷的聚乙烯醇的机械性能之间存在复杂的关系。印刷速度和填充密度对印刷样品的机械性能的影响可能不是线性的。研究样品证明了印刷方向和机械性能之间的出乎意料的关系，需要进一步的理论理解。与典型的工程材料相比，PVA样品的强度有很大的分散，并且在原始PVA丝的断裂应变中，3D打印过程可以减少分散，但程度有限。总而言之，在印刷参数和印刷的聚乙烯醇的机械性能之间存在复杂的关系。研究样品证明了印刷方向和机械性能之间的出乎意料的关系，需要进一步的理论理解。与典型的工程材料相比，PVA样品的强度有很大的分散，并且在原始PVA细丝的断裂应变中，3D打印过程可以减少分散，但程度有限。总而言之，在印刷参数和印刷的聚乙烯醇的机械性能之间存在复杂的关系。研究样品证明了印刷方向和机械性能之间的出乎意料的关系，需要进一步的理论理解。与典型的工程材料相比，PVA样品的强度有很大的分散，并且在原始PVA丝的断裂应变中，3D打印过程可以减少分散，但程度有限。总而言之，在印刷参数和印刷的聚乙烯醇的机械性能之间存在复杂的关系。