Engineering Product Development Pillar, Singapore University of Technology and Design, Singapore.
Lab Chip. 2013 Jun 21;13(12):2414-8. doi: 10.1039/c3lc50098e. Epub 2013 May 8.
A novel wicking material using nanostructured titania grown on high aspect ratio titanium micropillars is demonstrated. High aspect ratio titanium micropillars were micromachined from bulk titanium sheets. Nanostructured titania was then grown on the surface of titanium micropillars by oxidation in aqueous hydrogen peroxide solution followed by thermal annealing. The nanostructured titania formed has an open porous structure with a nanoscale pore diameter and wall thickness. X-ray diffraction and pole figure studies indicate the formation of anatase phase of titania and the absence of a preferred orientation in the porous film. The hybrid nanostructured titania on titanium micropillars has excellent hydrophilic properties with a water capillary speed comparable to or exceeding that of conventional wick materials commonly used in heat pipes for the thermal management of electronic devices.
一种使用在高纵横比钛微柱上生长的纳米结构二氧化钛的新型吸液材料得到了展示。高纵横比钛微柱是由块状钛片微加工而成的。然后，通过在过氧化氢水溶液中氧化，随后进行热退火，在钛微柱表面生长纳米结构二氧化钛。形成的纳米结构二氧化钛具有开放多孔结构，纳米级孔径和壁厚。X 射线衍射和极图研究表明，形成了锐钛矿相的二氧化钛，并且多孔膜中没有择优取向。在钛微柱上的混合纳米结构二氧化钛具有极好的亲水性能，其水毛细管速度可与或超过电子设备热管理中常用的热管中的常规吸液材料相当。
