College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
Mater Sci Eng C Mater Biol Appl. 2013 Dec 1;33(8):4732-8. doi: 10.1016/j.msec.2013.07.032. Epub 2013 Jul 30.
Feather wastes generated from poultry farms will pose a problem for disposal, but they are sustainable resources of keratin. Reduction is one of the commonly used methods to obtain soluble keratin from feather. However, the residues generated during feather reduction reaction were rarely investigated. In this study, the residues were transformed into a porous and flexible sponge film by freeze-drying without pretreatment or addition of cross-linking agents. Glycerol was used to alter the physical and chemical characteristics of the sponge film. The film was characterized with a fiber strong stretch instrument, a Fourier transform infrared spectrophotometer, scanning electron microscopy, an elemental analyzer, a differential scanning calorimeter and an automatic air permeability apparatus. Tensile strength and melting point of the sponge film with the optimum glycerol content were 6.2 MPa and 170°C respectively. Due to air permeability of 368 mm/s, the film can potentially be used in medicine, biology, textile, environmental technology, and so on. It is ecologically friendly and will produce additional benefits from the renewable materials. The film was utilized as adsorbents to remove Cr(VI) from aqueous solutions and as a filtering material for air pollution. Its maximum Cr(VI) uptake capacity was about 148.8 mg/g and the removal rate of PM10 was 98.3%.
从家禽养殖场产生的羽毛废物将对处理构成问题，但它们是角蛋白的可持续资源。还原是从羽毛中获得可溶性角蛋白的常用方法之一。然而，羽毛还原反应中产生的残留物很少被研究。在这项研究中，残留物通过冷冻干燥转化为多孔和柔性的海绵薄膜，无需预处理或添加交联剂。甘油用于改变海绵薄膜的物理和化学特性。使用纤维强力拉伸仪、傅里叶变换红外分光光度计、扫描电子显微镜、元素分析仪、差示扫描量热仪和自动透气度仪对薄膜进行了表征。具有最佳甘油含量的海绵薄膜的拉伸强度和熔点分别为 6.2 MPa 和 170°C。由于透气度为 368 mm/s，该薄膜有可能用于医学、生物学、纺织、环境技术等领域。它是生态友好的，并将从可再生材料中产生额外的效益。该薄膜被用作从水溶液中去除六价铬的吸附剂和用于空气污染的过滤材料。其最大六价铬吸附容量约为 148.8 mg/g，PM10 的去除率为 98.3%。
