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MXene-CNT-WPU 복합소재 기반 면상발열체의 배합 비율에 따른 발열 특성
오효준,이윤식,최춘기,닷꾸이응우엔 한국청정기술학회 2022 청정기술 Vol.28 No.4
This study presents an excellent planar heater based on low-dimensional composites. By optimizing the ratio of 1D carbon nanotubes (CNT) and 2D MXene (Ti3C2TX), it is possible to create a planar heater that has superior electrical conductivity and high heat generation characteristics. Low-dimensional composites were prepared by mixing CNT paste and MXene solution with eco-friendly waterborne polyurethane (WPU). In order to find the optimal mixing ratio for the MXene-CNT-WPU composites, samples with MXene to CNT weight ratios of 3:1, 1:1, 1:3, 1:7, and 1:14 were investigated. In addition to these different weight ratios, 5 wt% WPU was equally applied to each sample. It was confirmed that the higher the weight ratio of CNT, the lower the sheet resistance and the higher the heating temperature. In particular, when the MXene-CNT-WPU planar heater was fabricated by mixing MXene and CNT at a weight ratio of 1:7 and 1:14, the heating temperature was higher than the heating temperature of a CNT-WPU planar heater. These characteristics are due to the optimized mixture of the 1D materials (CNT) and the 2D materials (MXene) causing the formation of a flat surface and a dense network structure. The low-dimensional composites manufactured with the optimized mixing ratios found in this study are expected to be applied in flexible electronic devices. 본 연구는 1차원의 Carbon nanotube (CNT)와 2차원의 MXene을 최적의 비율로 배합한 우수한 전기전도성과 발열특성을 가진 저차원 복합소재 기반 면상발열체를 제안한다. CNT와 MXene을 친환경 소재인 Waterborne polyurethane (WPU)과 배합하되, MXene과 CNT의 중량비율을 3:1, 1:1, 1:3, 1:7, 1:14로 다르게 적용하고 WPU는 동일한 비율로 적용하였다. 그 결과, CNT 비율이 높을수록 면저항이 낮아지고 발열온도가 높아지는 것을 확인하였다. MXene과 CNT를 1:7, 1:14로 배합하는 경우CNT-WPU 면상발열체보다 더 낮은 면저항과 높은 발열온도를 보여주었다. 이는 1차원 CNT와 2차원 MXene의 최적 배합으로 고밀도 네트워크가 형성되어 평평한 표면이 형성되기 때문이다. 위 우수한 전기적 특성을 가진 저차원 복합소재는 플렉서블 소자에 유용하게 활용될 것으로 기대된다.
황윤재(Yun Jae Hwang),임민혁(Min Hyeok Lim),팽창웅(Changung Paeng),박형욱(Hyung Wook Park),김지수(Jisoo Kim) Korean Society for Precision Engineering 2023 한국정밀공학회지 Vol.40 No.3
MXene is one of the most fascinating 2D materials owing to its great electrical properties and unique performance. Among various application areas, the performance of organic material adsorption has been highlighted with the growing interest in the biocompatible applications of MXene. Although previous research revealed that the huge surface area of this 2D nanomaterial could lead to superior organic material adsorption performance, surface functional groups were usually controlled by changing the pH, and the MXene was generally produced by HF etchant. In this study, a surface modification method of Ti₃C₂T<SUB>x</SUB> MXene film was proposed to enhance organic material adsorption by irradiating the pulsed plasma electron beam (EB). Methylene blue (MB)-dispersed DI water was prepared, and pristine MXene was prepared at pH 7. The MB concentration was only reduced by 20% by pristine MXene. However, EB-treated MXene adsorbed about 75% of the MB within 20 min and over 90% within 80 min when the MXene film was ground to powder form. The results showed that the increased surface area and formation of hydrophilic functional groups successfully modified MB adsorption following EB irradiation under optimal processing conditions.
배정호 ( Jungho Bae ) 한국국방기술학회 2024 한국국방기술학회 논문지 Vol.6 No.1
2차원 평면에 결정구조를 갖는 2차원 소재는 2004년 처음 발견된 그래핀(Graphene)을 시작으로 2011년 발견된 맥신(MXene)에 이르기까지 나노기술 분야의 차세대 소재로 주목받고 있다. 2차원 소재 중 광범위하게 연구되고 있는 그래핀, 맥신, 육방정계 질화붕소, 전이금속 칼코게나이드의 특성을 소개하고 각 2차원 소재를 국방 분야에 적용할 수 있는 기술을 소개하여 차세대 무기체계 및 전력지원체계에 적용할 수 있는 방안을 제시하고자 한다. Two-dimensional materials, which have a crystal structure in a two-dimensional plane, are attracting attention as next-generation materials in nanotechnology, from Graphene, first discovered in 2004, to MXene, discovered in 2011. In this study, Among new 2D materials, we introduce the characteristics of Graphene, MXene, hexagonal boron nitride, and transition metal chalcogenide, which are being studied extensively, and introduce technologies that can be used to apply each 2D material to the defense field. We would like to present a method that can be applied to next-generation weapon systems and war-power support systems.