Borlea Mureşan Simona Ioana, Tiuc Ancuţa-Elena, Nemeş Ovidiu, Vermeşan Horaţiu, Vasile Ovidiu
Faculty of Materials and Environmental Engineering, Technical University of Cluj-Napoca, 28 Memorandumului Street, 400114 Cluj-Napoca, Romania.
National Institute for Research and Development in Environmental Protection, 294 Blvd Splaiul Independenței, Sector 6, 060031 Bucharest, Romania.
Materials (Basel). 2020 Feb 4;13(3):694. doi: 10.3390/ma13030694.
In recent years, natural materials are becoming a valid alternative to traditional sound absorbers due to reduced production costs and environmental protection. This study explores alternative usage of sheep wool as a construction material with improved sound absorbing properties beyond its traditional application as a sound absorber in textile industry or using of waste wool in the textile industry as a raw material. The aim of this study was to obtain materials with improved sound-absorbing properties using sheep wool as a raw material. Seven materials were obtained by hot pressing (60 ÷ 80 °C and 0.05 ÷ 6 MPa) of wool fibers and one by cold pressing. Results showed that by simply hot pressing the wool, a different product was obtained, which could be processed and easily manipulated. The obtained materials had very good sound absorption properties, with acoustic absorption coefficient values of over 0.7 for the frequency range of 800 ÷ 3150 Hz. The results prove that sheep wool has a comparable sound absorption performance to mineral wool or recycled polyurethane foam.
近年来，由于生产成本降低和环境保护，天然材料正成为传统吸声器的有效替代品。本研究探索了羊毛作为建筑材料的替代用途，其吸声性能优于其在纺织工业中作为吸声器的传统应用，或在纺织工业中使用废羊毛作为原材料。本研究的目的是以羊毛为原料获得具有改进吸声性能的材料。通过对羊毛纤维进行热压（60÷80°C和0.05÷6MPa）获得了七种材料，通过冷压获得了一种材料。结果表明，简单地对羊毛进行热压，就可以得到一种不同的产品，这种产品可以加工且易于操作。所获得的材料具有非常好的吸声性能，在800÷3150Hz频率范围内的吸声系数值超过0.7。结果证明，羊毛具有与矿棉或再生聚氨酯泡沫相当得吸声性能。
