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首页> 外文期刊>Progress in Organic Coatings: An International Review Journal >Biodegradation, cytocompatability and performance studies of vegetable oil based hyperbranched polyurethane modified biocompatible sulfonated epoxy resin/clay nanocomposites
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Biodegradation, cytocompatability and performance studies of vegetable oil based hyperbranched polyurethane modified biocompatible sulfonated epoxy resin/clay nanocomposites

机译：植物油基超支化聚氨酯改性生物相容性磺化环氧树脂/粘土纳米复合材料的生物降解，细胞相容性和性能研究

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Lack of degradability and decrease of landfill sites along with growing water and land pollution problems generate a strong concern about the use of synthetic non-biodegradable polymers. Mesua ferrea L. (Ceylon Ironwood) seed oil based diglycidyl sulfone epoxy resin was modified by the same oil based hyperbranched polyurethane. This hyperbranched polyurethane was prepared by using an A_2 + B_3 approach using monoglyceride of the oil as one of the components, as reported earlier. The epoxy resin was modified by incorporating three different weight percentages of hyperbranched polyurethane viz. 10, 20 and 30 wt%. The hyperbranched polyurethane treated epoxy system was characterized by FTIR, SEM and XRD techniques. The study of performance characteristics reveals that epoxy modified by 30 wt% HBPU is the best composition. Nanocomposites of 30 wt% HBPU based composition were prepared with different dose levels of organo nanoclay (1, 3 and 5 wt%) and were characterized by using wide angle X-ray diffraction (WAXD), SEM, TEM and FTIR techniques. The nanocomposite shows improvement in performance characteristics with the increase of clay content. The nanocomposite with 5 wt% of clay shows an increase of about 230% in tensile strength with respect to the pristine epoxy system. The biodegradability tested on all the samples by Pseudomonas aeruginosa bacterial strain and they exhibited significant degradation after 30 days of inoculation. Thus the resulted nanocomposites have potential to be used as biodegradable an advanced coating materials.
机译：缺乏可降解性和垃圾填埋场的减少，以及不断增长的水和土地污染问题，引起了人们对使用合成的不可生物降解聚合物的强烈关注。用相同的油基超支化聚氨酯改性Mesua ferrea L.（锡兰铁木）种子油基二缩水甘油基砜环氧树脂。如前所述，该超支化聚氨酯是使用A_2 + B_3方法制备的，该方法使用油的甘油单酸酯作为组分之一。通过掺入三种不同重量百分比的超支化聚氨酯，即改性环氧树脂。 10、20和30重量％。通过FTIR，SEM和XRD技术对超支化聚氨酯处理的环氧体系进行了表征。对性能特征的研究表明，用30 wt％HBPU改性的环氧树脂是最好的组成。用不同剂量水平的有机纳米粘土（1、3和5 wt％）制备30 wt％HBPU基组合物的纳米复合材料，并通过使用广角X射线衍射（WAXD），SEM，TEM和FTIR技术进行表征。随着粘土含量的增加，纳米复合材料表现出性能特征的改善。相对于原始环氧体系，具有5重量％粘土的纳米复合材料显示出约230％的拉伸强度增加。铜绿假单胞菌细菌菌株对所有样品的生物降解性进行了测试，接种30天后它们表现出明显的降解。因此，所得的纳米复合材料具有用作可生物降解的先进涂料的潜力。

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