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    • 2. 发明申请
    • Use of Variable Frequency Microwaves to Control the Teflon Profile of Gas Diffusion Media
    • 使用变频微波控制气体扩散介质的特氟龙轮廓
    • US20090211522A1
    • 2009-08-27
    • US12035307
    • 2008-02-21
    • Stephen PerlAnastasios Angelopoulos
    • Stephen PerlAnastasios Angelopoulos
    • B05C3/02H05B6/64
    • H01M8/0234
    • A method for fabricating diffusion media for a fuel cell that includes using variable frequency microwaves for heating the diffusion media after it has been coated with a solvent including fluorocarbon particles to provide broader control over the distribution of the fluorocarbon on the diffusion media. In one embodiment, a carbon fiber substrate is dipped in a solution including the fluorocarbon particles and a surfactant. The wet and coated substrate is then dried using the microwave radiation, where the frequency of the microwave radiation is varied to increase or control the dispersion of the fluorocarbon particles and the hydrophobicity of the diffusion media. In one embodiment, the microwave radiation is varied in frequency between 500 MHz and 1000 GHZ.
    • 一种用于制造用于燃料电池的扩散介质的方法,其包括使用可变频率微波加热所述扩散介质,所述可变频率微波已经涂覆有包含碳氟化合物颗粒的溶剂,以提供对所述扩散介质上碳氟化合物分布的更广泛的控制。 在一个实施方案中,将碳纤维基材浸渍在包含碳氟化合物颗粒和表面活性剂的溶液中。 然后使用微波辐射将湿的和涂覆的基底干燥,其中改变微波辐射的频率以增加或控制碳氟化合物颗粒的分散和扩散介质的疏水性。 在一个实施例中,微波辐射在500MHz和1000GHz之间的频率上变化。