Self-healing starch-based 'green' thermoset resin

POLYMER

卷:117

Article

Kim, Joo Ran¹  Netravali, Anil N.¹ 

[1] Cornell Univ, Fiber Sci & Apparel Design, Ithaca, NY USA

关键词: Self-healing green resin;    Waxy maize starch;    Microcapsules;    Starch based resin;    Butanetetracarboxylic acid;   

DOI  :  10.1016/j.polymer.2017.04.026

来源: Elsevier

【 摘 要 】

In the present research, self-healing green thermoset resin has been developed using waxy maize starch. Self-healing was achieved using waxy maize starch-loaded poly(d,l-lactide-co-glycolide) microcapsules (WMS-PLGA-MCs). Hydroxyl groups of WMS released from WMS-PLGA-MCs can bridge the microcrack surfaces by forming ester linkages between the carboxylic acid groups of Meso-1,2,3,4butanetetracarboxylic acid (BTCA) used in the resin as the crosslinker. Self-healing WMS resin containing 20% WMS-PLGA-MCs by weight showed self-healing efficiency in fracture stress of up to 51% and recovered about 66% of the original fracture toughness after 24 h of healing at room temperature. Self healing starch-based resin developed in this study is not only green and sustainable but the fabrication processes including microencapsulation are water-based and can be easily scaled up. The nontoxic starch based green resin can be useful for fabricating green composites in many indoor applications such as automotive, aerospace and packaging, to replace currently used petroleum-derived composites. (C) 2017 Elsevier Ltd. All rights reserved.

【 授权许可】

Free