Abstract

Interior and surface porous materials have widespread use in a wide variety of applications, especially for thermal and sound insulation due to their porous structure. Both sound and thermal insulation have great importance in a wide range of technical textile application areas including clothing and transportation such as train, car, aerospace and so on. In this study, for the first time, porous and non-porous polystyrene submicron fibers membranes have been compared for both sound absorption insulation and thermal insulation properties at the same time. Porous polystyrene electrospun fibers were produced at two different ratios of DMF:THF (4:1 and 7:3 ratio of DMF:THF) under conrolled humidity environment (60% RH). The results show that higher sound absorption insulation (SAC values) were obtained for non-porous fiber membrane (PS-ref) produced under ambient condition (30% RH) than porous fiber membrane (PS/7:3/RH and PS/4:1/RH) produced under controlled humidity condition (60% RH) by use of DMF:THF in 7:3 ratio and 4:1 ratio. Similar tendency was observed for thermal conductivity coefficient. Thus, all these results show that thinner fiber leading higher surface area has more dominant effect on both thermal insulation and sound absorption insulation than the formation of porous structures on the surface or internal structure of the fiber.

摘要

内部和表面多孔材料广泛用于各种应用，尤其是由于其多孔结构而用于隔热和隔音。隔音和隔热在包括服装和运输（如火车、汽车、航空航天等）在内的广泛的产业用纺织品应用领域中都具有重要意义。在这项研究中，首次同时比较了多孔和无孔聚苯乙烯亚微米纤维膜的吸声绝缘和隔热性能。在受控湿度环境（60% RH）下，以两种不同的 DMF:THF 比例（DMF:THF 的比例为 4:1 和 7:3）生产多孔聚苯乙烯电纺纤维。结果表明，在环境条件（30% RH）下生产的无孔纤维膜（PS-ref）比多孔纤维膜（PS/7:3/RH 和 PS/4）获得更高的吸声隔声（SAC 值） :1/RH) 在受控湿度条件 (60% RH) 下使用 DMF:THF 以 7:3 和 4:1 的比例生产。对于导热系数也观察到了类似的趋势。因此，所有这些结果表明，与在纤维的表面或内部结构上形成多孔结构相比，导致更高表面积的较细纤维对隔热和吸声绝缘的影响更大。对于导热系数也观察到了类似的趋势。因此，所有这些结果表明，与在纤维的表面或内部结构上形成多孔结构相比，导致更高表面积的较细纤维对隔热和吸声绝缘的影响更大。对于导热系数也观察到了类似的趋势。因此，所有这些结果表明，与在纤维的表面或内部结构上形成多孔结构相比，导致更高表面积的较细纤维对隔热和吸声绝缘的影响更大。