This study produces electroconductive polycaprolactone (PCL)-based film with different amounts of graphene (G) through electrospinning, and the characteristics of the produced G/PCL composites are investigated. The G/PCL results are analyzed by comparing them with those obtained using pure PCL electrospun film as a control. The morphology of electrospun material is analyzed through scanning electron microscopy and transmission electron microscopy. Mechanical and electrical properties are also evaluated. Composites containing 1% graphene have the highest elongation rate, and 5% samples have the highest strength and elasticity. Graphene contents > 25% show electro-conductivity, which level improves with increase of graphene content. Biological characteristics of G/PCL composites are assessed through behavioral analysis of neural cell attachment and proliferation. Cell experiments reveal that compositions < 50% show slightly reduced cell viability. Moreover, graphene combinations facilitated cell proliferation compared to pure PCL. These results confirm that a 25 % G/PCL composition is best for application to systems that introduce external stimuli such as electric fields and electrodes to lead to synergistic efficiency of tissue regeneration.

In the present study, we develop a conductive copper/carbon nanomaterial additive and investigate the effects of the morphologies of the carbon nanomaterials on the conductivities of composites containing the additive. The conductive additive is prepared by mechanically milling copper powder with carbon nanomaterials, namely, multi-walled carbon nanotubes (MWCNTs) and/or few-layer graphene (FLG). During the milling process, the carbon nanomaterials are partially embedded in the surfaces of the copper powder, such that electrically conductive pathways are formed when the powder is used in an epoxy-based composite. The conductivities of the composites increase with the volume of the carbon nanomaterial. For a constant volume of carbon nanomaterial, the FLG is observed to provide more conducting pathways than the MWCNTs, although the optimum conductivity is obtained when a mixture of FLG and MWCNTs is used.

최근 대두된 난분해성 미량오염물질은 일반적인 수처리 공법으로는 제거가 잘 되지 않고 수 ng/L 단위로도 수중생태계와 인간에게 독성을 나타내므로 반드시 처리가 필요하다. 따라서 본 연구에서는 CNT (Carbon nanotube)를 이용하여 중공사막을 제조한 후, 그것을 전극으로 사용하여 미량오염물질을 전기화학적으로 산화 제거하였다. SEM, BET, flux, conductivity 결과를 통해 전극의 특성을 분석하였다. BPA(bisphenol A), Sulfamethoxazole(SMX), N,N-Diethyl-metatoluamide(DEET) 3가지 물질을 제거 대상 미량오염물질로 선정하였고 CHM 산화극 내부로 오염물질이 포함된 물을 흘려 보내주었을 때 5분 만에 100%의 제거효율을 보였다.