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首页> 外文期刊>RSC Advances >A starch based sustainable tough hyperbranched epoxy thermoset
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A starch based sustainable tough hyperbranched epoxy thermoset

机译：基于淀粉的可持续性强韧超支化环氧热固性材料

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摘要

With the growing concern of long term environmental and waste management problems, the recent trend in the polymer industry is aimed to utilize environmentally benign substrates for development of sustainable polymers with the required properties for their potential applications as substitutes for petrochemical derivatives. In this arena, the authors aspired to use starch, a natural renewable polysaccharide obtained from a wide variety of crops, as one of the reactants for a one-pot synthesis of a bio-based sustainable hyperbranched epoxy resin. Nuclear magnetic resonance (H-1 NMR and C-13 NMR), Fourier transformed infrared spectroscopy (FTIR) along with different analytical techniques confirmed the chemical structure of the resin. The poly(amido amine) cured epoxy thermoset exhibited acceptable biodegradation along with desirable properties. It exhibits excellent impact resistance (>100 cm), outstanding scratch hardness (>10 kg), exceptionally high tensile adhesive strength (up to 2906 MPa for aluminum), moderate tensile strength (up to 29 MPa), good elongation at break (up to 38%), high toughness (up to 8.40 MJ m(-3)) and very good chemical resistance against a number of chemical environments. Moreover, the thermoset displayed potent biomedical attributes by exhibiting cytocompatibility with erythrocytes as assessed through a hemolytic assay. Thus, the synthesized eco-friendly and sustainable hyperbranched epoxy thermoset with good toughness and exceptional adhesive strength can be a worthy replacement for petroleum-based epoxy thermosets as an advanced engineering material.
机译：随着对长期环境和废物管理问题的日益增长的关注，聚合物工业中的最新趋势旨在利用对环境无害的基材来开发可持续聚合物，该聚合物具有其潜在应用所需要的特性，以替代石油化学衍生物。在这个领域，作者希望使用淀粉（一种从多种农作物中获得的天然可再生多糖）作为一锅合成生物基可持续性超支化环氧树脂的反应物之一。核磁共振（H-1 NMR和C-13 NMR），傅立叶变换红外光谱（FTIR）以及不同的分析技术证实了该树脂的化学结构。聚（酰胺胺）固化的环氧热固性树脂表现出可接受的生物降解以及所需的性能。它具有出色的耐冲击性（> 100 cm），出色的耐刮擦性（> 10 kg），极高的拉伸粘合强度（铝达到2906 MPa），中等拉伸强度（高达29 MPa），良好的断裂伸长率到38％），高韧性（高达8.40 MJ m（-3））和对许多化学环境的很好的耐化学性。此外，如通过溶血测定所评估的，热固性塑料通过表现出与红细胞的细胞相容性而显示出有效的生物医学特性。因此，具有良好的韧性和优异的粘合强度的合成的环保，可持续的超支化环氧热固性材料可以作为石油基环氧热固性材料的先进工程材料而值得替代。

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