ABSTRACT

The inherent biodegradable of PCL is a major challenge for its use in various commercial applications. Thermally exfoliated graphene oxide (TEGO) reinforced polycaprolactone (PCL) based bio-composite films were prepared by solution casting method. Extended probe ultrasonication was employed to ensure efficient dispersion of TEGO. The microstructure and properties of the obtained PCL/TEGO bio nanocomposite films were investigated by FTIR, SEM, XRD, TGA and antimicrobial activity. The effect on water absorption properties and antimicrobial activity of the biopolymer in presence of TEGO were also investigated. The SEM results showed that TEGO was successfully dispersed in PCL matrix generating a porous microstructure. Moreover, incorporation of TEGO particles lead to enhancement of water absorption capacity while decrease in the density. The out-turn (effect) of the functionalized TEGO reinforcement on the thermal and water absorption properties of PCL/TEGO samples were also studied and compared with PCL films.

摘要

PCL固有的可生物降解性是其在各种商业应用中的主要挑战。通过溶液流延法制备了热剥落的氧化石墨烯（TEGO）增强的聚己内酯（PCL）基生物复合膜。采用扩展探针超声处理以确保TEGO的有效分散。通过FTIR，SEM，XRD，TGA和抗菌活性研究了所得PCL / TEGO生物纳米复合薄膜的微观结构和性能。还研究了在TEGO存在下对生物聚合物的吸水性能和抗菌活性的影响。SEM结果表明，TEGO成功地分散在PCL基质中，形成了多孔的微观结构。此外，掺入TEGO颗粒导致吸水能力增强，同时密度降低。