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Investigation on the thermal degradation, moisture absorption characteristics and antibacterial behavior of natural insulation materials
Materials for Renewable and Sustainable Energy Pub Date : 2021-02-01 , DOI: 10.1007/s40243-021-00188-8
Ayaz Ahmed , Adnan Qayoum

The demand for natural insulation materials is increasing with special attention to the use of such materials for exploiting renewable energy. Natural insulation materials tremendously influence the sustainability development and energy efficiency enhancement in the buildings. Natural fibers from animal’s origin absorb great amount of moisture on exposed to the environment which significantly affects the performance and thermal insulation properties. The thermal degradation of such material strongly influences the accidental burning characteristics, an important selection criteria for building materials. In the present study, three different kind of natural insulation materials namely sheep wool, goat wool and horse mane have been characterized in terms of moisture absorption, thermal degradation and morphology using thermogravimetric analysis (TGA), differential scanning calorimetry techniques, and scanning electron microscopy, respectively. In addition, antibacterial behavioral study has been also carried out for untreated raw wool and treated wool (copper nitrate). These properties are vital for a holistic evaluation of the insulation material. Moisture absorption results indicate that the sheep wool and goat wool absorb less moisture content as compared to horse mane. Unlike this horse mane shows great stability than goat wool and sheep wool in the temperature range not exceeding 470 °C. TGA data indicate 50% mass loss (T50%) at 306 °C, 322 °C and 318 °C for sheep wool, goat wool and horse mane, respectively. In addition the tests show that the content of fire retardant elements like nitrogen and sulphur is more in horse mane as compared to sheep wool and goat wool. The treated wool samples showed excellent antibacterial properties as compared to untreated wool samples.



中文翻译:

天然保温材料的热降解,吸湿特性和抗菌性能研究

对天然绝缘材料的需求正在增加,尤其是要注意使用这种材料来开发可再生能源。天然保温材料极大地影响了建筑物的可持续发展和能效的提高。来自动物的天然纤维在暴露于环境时会吸收大量水分,这会严重影响性能和隔热性能。这种材料的热降解强烈影响意外燃烧特性,这是建筑材料的重要选择标准。在本研究中,根据吸湿性,表征了三种不同类型的天然隔热材料,即羊毛,山羊绒和马鬃。分别使用热重分析(TGA),差示扫描量热技术和扫描电子显微镜观察热降解和形态。此外,还对未经处理的原羊毛和经过处理的羊毛(硝酸铜)进行了抗菌行为研究。这些特性对于绝缘材料的整体评估至关重要。吸湿结果表明,与马鬃相比,绵羊毛和山羊绒吸收的水分较少。与之不同的是,在不超过470°C的温度范围内,马鬃毛显示出比山羊羊毛和绵羊羊毛更大的稳定性。TGA数据表明质量损失为50%(还对未经处理的原羊毛和经过处理的羊毛(硝酸铜)进行了抗菌行为研究。这些特性对于绝缘材料的整体评估至关重要。吸湿结果表明,与马鬃相比,绵羊毛和山羊绒吸收的水分较少。与之不同的是,在不超过470°C的温度范围内,马鬃毛显示出比山羊羊毛和绵羊羊毛更大的稳定性。TGA数据表明质量损失为50%(还对未经处理的原羊毛和经过处理的羊毛(硝酸铜)进行了抗菌行为研究。这些特性对于绝缘材料的整体评估至关重要。吸湿结果表明,与马鬃相比,绵羊毛和山羊绒吸收的水分较少。与之不同的是,在不超过470°C的温度范围内,马鬃毛显示出比山羊羊毛和绵羊羊毛更大的稳定性。TGA数据表明质量损失为50%(分别在306°C,322°C和318°C的温度下(T 50%)适用于绵羊毛,山羊绒和马鬃。此外,测试表明,与绵羊羊毛和山羊羊毛相比,马鬃中阻燃元素(如氮和硫)的含量更高。与未处理的羊毛样品相比,处理过的羊毛样品显示出极好的抗菌性能。

更新日期:2021-02-01
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