A New Technique for Batch Production of Tubular Anodic Aluminum Oxide Films for Filtering Applications

作者：Hun Chien Wan^*; Chiu Yu Jia; Luo Zhiping; Chen Chien Chon; Chen Shih Hsun^*

来源：Applied Sciences-Basel, 2018, 8(7): 1055.

DOI：10.3390/app8071055

• tubular anodic aluminum oxide (AAO)
• porous material
• nanochannels
• filtering

With larger surface areas and nanochannels for mass delivery and gas diffusion, three-dimensional tubular anodic aluminum oxide (AAO) films have practical advantages over two-dimensional AAO films for medical and energy applications. In this research, we have developed a process for batch production of tubular AAO films using a 6061 Al tube. The tubular AAO films have open nano-channels on both sides, with average pore dimensions of about 60 nm and pore densities of about 10(8) to 10(9) pore/cm(2). It was found that the porous AAO material with nano-channel structure exhibited dialysis behavior, allowing for liquid/gas exudation through diffusion between the inner and outer surfaces of the tubular AAO films. Ar gas bearing test and aeration test were conducted to find the pressure bearing capacity of tubular AAO films. It was demonstrated that the AAO film with a thickness of 100 mu m can resist an argon pressure up to 8 atm; however, 30 mu m AAO film can only withstand 3 atm of Ar gas. The tubular AAO films with exudation characteristics have the potential for applications in advanced technologies, such as liquid or gas filters, drug delivery, and energy applications.

• 出版日期2018-7
• 单位西北大学