Soares Luiza Fernandes, César Dos Santos Júlio, Araújo de Freitas Victor Augusto, Dutra Pereira Robson Bruno, Panzera Tulio Hallak, Scarpa Fabrizio
Centre for Innovation and Technology in Composite Materials - CITeC, Department of Mechanical and Production Engineering, Federal University of São João del Rei-UFSJ Brazil
Centre for Innovation and Technology in Composite Materials - CITeC, Department of Natural Sciences, Federal University of São João del Rei-UFSJ Brazil
RSC Sustain. 2024 Jan 24;2(4):975-987. doi: 10.1039/d3su00374d. eCollection 2024 Apr 4.
PU foams are versatile materials that find applications in a wide range of products, from upholstery to packaging and construction. These foams consist primarily of two components, polyol and prepolymer, and their concentrations play a crucial role in determining their physical and mechanical properties. A second-order mixture design approach is used in this work to identify the significant components and their contributions on the physical-mechanical properties of biodegradable castor oil-based foams. The experimental design includes three components: two types of polyols and one prepolymer. These components are varied in nine distinct conditions to evaluate their effects on properties such as expansion rate, bulk density, compressive strength, and tensile strength. The Scheffé's quadratic model coefficients exhibit R-squared values higher than 0.84 in most cases. Chemical analysis using infrared spectroscopy confirms the successful formation of the urethane bond during the manufacturing process. The biobased foams developed in this work have densities ranging between 61 and 100 kg m, compressive modulus of 11-15 MPa and compressive strength between 273 and 429 kPa. The tensile modulus varies between 3.2 and 4.9 MPa, with a tensile strength in the range of 370-500 kPa. These results highlight the potential of biodegradable castor oil-based foams as promising alternative materials to traditional synthetic foams.
聚氨酯泡沫是一种用途广泛的材料，在从室内装潢到包装和建筑等众多产品中都有应用。这些泡沫主要由两种成分组成，即多元醇和预聚物，它们的浓度在决定其物理和机械性能方面起着关键作用。本研究采用二阶混合设计方法来确定对基于生物可降解蓖麻油的泡沫的物理机械性能有显著影响的成分及其贡献。实验设计包括三个成分：两种类型的多元醇和一种预聚物。这些成分在九个不同条件下变化，以评估它们对诸如膨胀率、堆积密度、抗压强度和拉伸强度等性能的影响。在大多数情况下，谢费二次模型系数的决定系数R²值高于0.84。使用红外光谱进行的化学分析证实了在制造过程中成功形成了聚氨酯键。本研究中开发的生物基泡沫密度在61至100 kg/m之间，压缩模量为11 - 15 MPa，抗压强度在273至429 kPa之间。拉伸模量在3.2至4.9 MPa之间变化，拉伸强度在370 - 500 kPa范围内。这些结果突出了基于生物可降解蓖麻油的泡沫作为传统合成泡沫的有前景替代材料的潜力。
