Bioplastics from feather quill.
Bioplastics from feather quill.
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DOI：
10.1021/bm201112n
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发表时间：
2011-09
影响因子：
6.2
通讯作者：
A. Ullah;T. Vasanthan;D. Bressler;A. Elias;Jianping Wu
中科院分区：
文献类型：
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作者：
A. Ullah;T. Vasanthan;D. Bressler;A. Elias;Jianping Wu
家禽羽毛羽毛在双螺杆挤出机中以亚硫酸钠处理作为还原剂挤出。然后研究了四种不同增塑剂（乙二醇、丙二醇、甘油和酒石酸二乙酯）对热塑性性能的影响。通过傅里叶变换红外光谱（FTIR）评估挤出树脂中的构象变化和增塑剂-蛋白质相互作用，同时通过动态力学分析（DMA）研究用不同增塑剂增塑的羽毛状角蛋白的粘弹性行为。采用差示扫描量热法（DSC）测定不同增塑剂对蛋白质变性的影响。通过热重分析（TGA）研究了挤出物的热降解模式。增塑剂对树脂机械性能的影响也通过拉伸强度测量来评估。结果表明，乙二醇能够在分子水平上更有效地与羽毛角蛋白相互作用，与其他增塑树脂相比，仅表现出明显的玻璃化转变、更好的机械性能和更高的透明度。甘油增塑材料中发现的两相归因于富含甘油和富含蛋白质的区域。丙二醇和酒石酸二乙酯表现出较低的氢键相互作用，并且在加热过程中 DMA 曲线显示出较宽的过渡区域，表明羽毛角蛋白和这些增塑剂之间的相互作用较弱且不均匀。
Poultry feather quills have been extruded in a twin screw extruder with sodium sulfite treatment as a reducing agent. The effect of four different plasticizers (ethylene glycol, propylene glycol, glycerol, and diethyl tartrate) on the thermoplastic properties was then investigated. Conformational changes and plasticizer-protein interactions in the extruded resins were assessed by Fourier transform infrared spectroscopy (FTIR), while viscoelastic behavior of the quill keratin plasticized with different plasticizers was investigated by dynamic mechanical analysis (DMA). Differential scanning calorimetry (DSC) was used to determine the effect of different plasticizers on protein denaturation. Thermal degradation patterns of the extrudates were studied by thermogravimetric analysis (TGA). The effect of plasticizers on the mechanical properties of resins was also assessed by tensile strength measurements. Results indicated that ethylene glycol was able to interact more effectively with quill keratin at the molecular level, exhibiting only one sharp glass transition, better mechanical properties, and higher transparency compared to other plasticized resins. The two phases found in glycerol plasticized material were attributed to glycerol-rich and protein-rich zones. Propylene glycol and diethyl tartrate exhibited lower H-bonding interactions and showed wide transition regions in DMA profiles during heating, suggesting weak and heterogeneous interactions between quill keratin and these plasticizers.