Keratin modified and functionalized as a reinforcement and nucleation agent of β-Polypropylene composites.

In this work, it was expected to obtain a novel β nucleating agent using a natural waste as it is the keratin, obtained from chicken feathers. For this, the keratin was previously functionalized with pimelic acid. This new reinforcement increased the thermomechanical properties of the raw polypropylene even at lower weight percentages and demonstrated to promote high percentages of β crystal in the matrix.

The data presented below show results for Fourier-transform infrared spectroscopy (FTIR), Differential Scanning Calorimetry (DSC) and Dynamical Mechanical Analysis (DMA) experiments.

The file "Fourier transform infrared spectroscopy FTIR.xlxs" contains the infrared analysis data for natural ground keratin (named "Keratin" in the attached file), for the keratin after an alkaline sodium hydroxide treatment (named "KM" in the attached file), for the keratin functionalized with calcium pimelate (named "KPA" in the attached file) and for the pimelic acid (named "PA" in the attached file).

The "Differential Scanning Calorimetry DSC.xlxs " file contains the data for the 0.5, 1.0 and 5.0%wt composites with alkaline treatment (named "KM" in the attached file) and composites functionalized with calcium pimelate (named "KPA" in the attached file).

The "Dynamical Mechanical Analysis DMA.xlxs " file contains the storage modulus and Tan δ data for the 0.5, 1.0. and 5.0%wt composites of the studied systems. The data for the storage modulus of the alkaline treated composites are in sheet1 (named "Storage modulus for KM" in the attached file), the data for the Tan δ values of the alkaline treated composites are in sheet2 (named "Tan δ for KM" in the attached file), the data for the storage modulus of the functionalized composites are in sheet3 (labeled "Storage modulus for KPA" in the attachment) and the data for the Tan δ values of the functionalized composites are in sheet4 (labeled "Tan δ for KPA" in the attachment).

本研究旨在利用鸡毛中提取的角蛋白这种天然废弃物，作为新型β成核剂的原料。为此，角蛋白经过己二酸的前处理。这种新的强化手段显著提升了原始聚丙烯的 thermomechanical 性能，即便在较低的质量百分比下，亦能显著促进基体中β晶体的形成百分比。下述数据展示了傅里叶变换红外光谱（FTIR）、差示扫描量热法（DSC）以及动态力学分析（DMA）实验的结果。文件“Fourier transform infrared spectroscopy FTIR.xlxs”包含了天然地角蛋白（在附件文件中命名为“Keratin”）、经碱性氢氧化钠处理后的角蛋白（在附件文件中命名为“KM”）、钙己二酸功能化的角蛋白（在附件文件中命名为“KPA”）以及己二酸（在附件文件中命名为“PA”）的红外分析数据。文件“Differential Scanning Calorimetry DSC.xlxs”包含了0.5%、1.0%和5.0%wt的碱性处理复合物（在附件文件中命名为“KM”）以及钙己二酸功能化复合物（在附件文件中命名为“KPA”）的数据。文件“Dynamical Mechanical Analysis DMA.xlxs”包含了所研究体系中0.5%、1.0%和5.0%wt复合物的储能模量和Tan δ数据。碱性处理复合物的储能模量数据位于sheet1（在附件文件中命名为“Storage modulus for KM”），碱性处理复合物的Tan δ值数据位于sheet2（在附件文件中命名为“Tan δ for KM”），功能化复合物的储能模量数据位于sheet3（标签为“Storage modulus for KPA”），功能化复合物的Tan δ值数据位于sheet4（标签为“Tan δ for KPA”）中。