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Protein/Protein Nanocomposite Based on Whey Protein Nanofibrils in a Whey Protein Matrix
ACS Sustainable Chemistry & Engineering ( IF 8.4 ) Pub Date : 2018-03-15 00:00:00 , DOI: 10.1021/acssuschemeng.8b00330 Xinchen Ye 1 , Kristina Junel 2 , Mikael Gällstedt 3 , Maud Langton 4 , Xin-Feng Wei 1 , Christofer Lendel 5 , Mikael S. Hedenqvist 1
ACS Sustainable Chemistry & Engineering ( IF 8.4 ) Pub Date : 2018-03-15 00:00:00 , DOI: 10.1021/acssuschemeng.8b00330 Xinchen Ye 1 , Kristina Junel 2 , Mikael Gällstedt 3 , Maud Langton 4 , Xin-Feng Wei 1 , Christofer Lendel 5 , Mikael S. Hedenqvist 1
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This article describes nanocomposite films with separately grown protein nanofibrils (PNFs) in a nonfibrillar protein matrix from the same protein starting material (whey). Tensile tests on the glycerol-plasticized films indicate an increased elastic modulus and a decreased extensibility with increasing content of PNFs, although the films are still ductile at the maximum PNF content (15 wt %). Infrared spectroscopy confirms that the strongly hydrogen-bonded β-sheets in the PNFs are retained in the composites. The films appear with a PNF-induced undulated upper surface. It is shown that micrometer-scale spatial variations in the glycerol distribution are not the cause of these undulations. Instead, the undulations seem to be a feature of the PNF material itself. It was also shown that, apart from plasticizing the protein film, the presence of glycerol seemed to favor to some extent exfoliation of stacked β-sheets in the proteins, as revealed by X-ray diffraction.
中文翻译:
乳清蛋白基质中基于乳清蛋白纳米纤维的蛋白质/蛋白质纳米复合材料
本文介绍了在非原纤维蛋白质基质中具有相同蛋白质起始材料(乳清)的,分别生长的蛋白质纳米原纤维(PNF)的纳米复合膜。在甘油增塑的薄膜上进行的拉伸试验表明,随着PNF含量的增加,弹性模量增加,延展性降低,尽管薄膜在最大PNF含量(15 wt%)下仍具有延展性。红外光谱证实,PNF中强氢键合的β-折叠层保留在复合物中。这些膜具有PNF诱导的起伏起伏的上表面。结果表明,甘油分布的微米级空间变化不是这些起伏的原因。相反,起伏似乎是PNF材料本身的特征。还表明,除了增塑蛋白质膜外,
更新日期:2018-03-15
中文翻译:
乳清蛋白基质中基于乳清蛋白纳米纤维的蛋白质/蛋白质纳米复合材料
本文介绍了在非原纤维蛋白质基质中具有相同蛋白质起始材料(乳清)的,分别生长的蛋白质纳米原纤维(PNF)的纳米复合膜。在甘油增塑的薄膜上进行的拉伸试验表明,随着PNF含量的增加,弹性模量增加,延展性降低,尽管薄膜在最大PNF含量(15 wt%)下仍具有延展性。红外光谱证实,PNF中强氢键合的β-折叠层保留在复合物中。这些膜具有PNF诱导的起伏起伏的上表面。结果表明,甘油分布的微米级空间变化不是这些起伏的原因。相反,起伏似乎是PNF材料本身的特征。还表明,除了增塑蛋白质膜外,