UV-LED导热油墨的研制及应用研究

Research on Development and Application of UV-LED Thermal Ink

采用合成的三聚氰胺-甲醛树脂(MF)包埋纳米石墨烯(G)制备导热纳米填料(MF@G),辅以连接料、颜料和各类助剂,制备了紫外发光二极管固化(UV-LED)导热油墨。通过傅里叶变换红外光谱(FTIR)、扫描电镜(SEM)、X射线衍射(XRD)、拉曼光谱(Raman)和热重分析(TGA)等技术表征了MF@G的形貌和性能,并测试了油墨的细度、黏度、流平性、固化速率、附着力和导热系数等指标。研究结果表明,MF对G的包埋作用不会破坏G的固有晶型,还可以降低G的缺陷。当MF@G的质量分数为3%时,UV-LED导热油墨的印刷适性良好,将其印刷在铝塑膜上后,它的导热系数可提升至1.289 W/(m·K),相比于未添加导热填料的油墨试样,其提升率高达413.55%。

Melamine-formaldehyde resin(MF)was synthesized to embed nanographene(G)for fabricating thermally conductive nanofillers(MF@G),then the ultraviolet light emitting diode(UV-LED)thermally conductive inks were prepared with the supplement of binders,pigments and various additives.The morphology and performance of MF@G were characterized by Fourier transform infrared(FTIR),scanning electron microscope(SEM),X-ray diffraction(XRD),Raman and thermogravimetric analysis(TGA)techniques,and the fineness,viscosity,fluidity,curing rate,adhesion and thermal conductivity of inks were tested.The research results show that the embedding effect of MF on G would not destroy the inherent crystal of G and could also reduce the defects of G.When the addition of MF@G is 3%,the printability of UV-LED thermally conductive ink is good.After it is printed on the aluminum-plastic film,its thermal conductivity could be increased to 1.289 W/(m·K),comparing with the ink sample without thermally conductive filler,the improvement rate could achieve 413.55%.