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首页> 外文期刊>Composites Science and Technology >Self-healing of 'green' thermoset zein resins with irregular shaped waxy maize starch-based/poly(D,L-lactic-co-glycolic acid) microcapsules
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Self-healing of 'green' thermoset zein resins with irregular shaped waxy maize starch-based/poly(D,L-lactic-co-glycolic acid) microcapsules

机译：具有不规则形状的蜡质玉米淀粉基/聚（D，L-乳酸-共乙醇酸）微胶囊的'绿色'热固性玉米醇溶蛋白树脂的自修复

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摘要

Self-healing 'green' thermoset zein resin was developed using elongated multi-geometrical poly (D,L-lactic-co-glycolic acid) (PLGA) microcapsules (MCs) containing waxy maize starch (WMS) or oxidized WMS (OWMS) as healing agents. A novel method combining co-axial injection and emulsion-solvent evaporation technique was developed to fabricate multi-geometrical MCs with aspect ratios greater than 1. While their rougher surface enhances the resin-MC mechanical bonding, higher aspect ratio increases the probability of MC being in the path of microcracks. Also, the OWMS, containing aldehyde groups, forms covalent bonds with zein, whereas WMS only provides H-bonding. Results indicated that zein resins with 15 wt% WMS/PLGA and OWMS/PLGA MCs had self-healing efficiencies of 51% and 72% in fracture stress, respectively. This significant enhancement for OWMS healant is possibly due to covalent bonding with zein resin. This study demonstrates that self-healing thermoset zein resin can be a promising 'green' solution with longer service life, for a broad range of applications.
机译：使用包含蜡质玉米淀粉（WMS）或氧化WMS（OWMS）的细长多几何聚（D，L-乳酸-乙醇酸乙醇）（PLGA）微胶囊（MC）开发了可自我修复的“绿色”热固玉米醇溶蛋白树脂。愈合剂。开发了一种将同轴注入和乳液-溶剂蒸发技术相结合的新方法，以制造长径比大于1的多几何形状的MC。虽然其粗糙的表面增强了树脂-MC的机械结合力，但高的长径比却增加了MC发生的可能性。在微裂纹的路径中。同样，含有醛基的OWMS与玉米蛋白形成共价键，而WMS仅提供H键。结果表明，具有15 wt％WMS / PLGA和OWMS / PLGA MC的玉米醇溶树脂在断裂应力下的自愈效率分别为51％和72％。 OWMS治疗剂的这一显着增强可能是由于与玉米醇溶蛋白树脂的共价键合。这项研究表明，自修复的热固性玉米醇溶树脂可以成为一种有前景的“绿色”解决方案，具有更长的使用寿命，适用于广泛的应用。

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