Biobased rubber/halloysite nanotube nanocomposites with self-healing abilities
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초록
내용
Rubber vulcanizates with self-healing capabilities have attracted significant attentions in recent years. Several studies have been carried out on using various inorganic nanofillers with specific functional groups on their surfaces to improve mechanical properties and self-healing effects of rubbers. In this work, halloysite nanotube, a naturally occurring tubular clay, functionalized with tannic acid (TA) was incorporated into biobased epoxidized natural rubber (ENR) crosslinked by 1,2,4-aminotriazole (ATA). Morphology, mechanical properties and self-healing effects of the ATA cured ENR/HNT@TA nanocomposites were examined by TEM, DMA, and tensile test. The results revealed that the nanocomposites filled with the HNTs@TA exhibited considerable self-healing efficiency and reinforcement effects, which were facilitated by multiple hydrogen-bonding interactions between abundant phenolic moieties of the HNT@TA and ATA cured ENR chains.