Effects of surfactants on mechanical and thermal properties of soy-based polyurethane foams
Effects of surfactants on mechanical and thermal properties of soy-based polyurethane foams
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DOI：
10.1177/0021955x20912200
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发表时间：
2020-03-12
影响因子：
2.5
通讯作者：
Nam, Paul
中科院分区：
文献类型：
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作者：
Dhaliwal, Gurjot S.;Anandan, Sudharshan;Nam, Paul
与挤塑聚苯乙烯泡沫塑料和矿棉等传统材料相比，聚氨酯泡沫塑料具有较高的绝缘性能，因此被广泛用于绝缘应用。在本研究中，在保持大豆多元醇、二异氰酸酯、催化剂和发泡剂(水)等其他组分不变的情况下，使用五种不同的表面活性剂制备了大豆基聚氨酯泡沫塑料。对制备的样品进行了机械和热性能测试，以评估不同用量的表面活性剂的效果。用扫描电子显微镜观察了泡沫样品的形貌。当表面活性剂的用量从0.5g增加到5.0g时，泡孔尺寸减小了17倍。表面活性剂含量越高的样品，封闭的泡孔数量也越多。与添加0.5g表面活性剂的样品相比，添加2.0和5.0g表面活性剂的样品具有更好的隔热性能。制备的泡沫样品的机械强度、吸湿率和密度也有类似的趋势。
Polyurethane foams are widely used for insulation applications due to their high insulation properties as compared to conventional materials such as extruded polystyrene foam and mineral wool. In this study, soy-based polyurethane foams were prepared using five different surfactants while keeping other components such as soy-based polyol, diisocyanate, catalyst, and blowing agent (water) constant. Prepared samples were tested for mechanical and thermal properties to evaluate the effect of different surfactants used in varying quantities. The morphology of the foam samples was observed using a scanning electron microscope. Seventeen fold reduction in the cell size was observed with an increase in the amount of surfactant from 0.5 to 5.0 g. Samples with higher amounts of surfactant also exhibited a higher number of closed cells. Better thermal insulation was observed for samples with 2.0 and 5.0 g of surfactant as compared to samples with 0.5 g of surfactant. A similar trend was observed in the mechanical strength, moisture absorbance, and density of the fabricated foam samples.