High-flux carbon paper for fuel cell and preparation method of high-flux carbon paper
A fuel cell, high-throughput technology, used in chemical instruments and methods, applications, household appliances, etc., can solve problems such as single structure design, inability to meet the requirements of high-throughput gas transmission and high drainage, and ignoring the performance requirements of carbon paper
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[0019] Example 1:
[0020] A preparation method of high-flux carbon paper for fuel cells, the preparation method comprises the following steps:
[0021] (1) Use a chopper to cut the carbon fibers, and cut them into two types with lengths of 50mm and 5mm, respectively, with a ratio of 1:2, and use a double-roll fiber opener to open the chopped carbon fibers mixed with the two lengths. Loosening, using air as the dispersing medium, using a high-speed rotating roller to disperse the fiber raw material into a single fiber state;
[0022] (2) the dispersed carbon fibers are introduced into the air-flow carding machine through the air-flow fiber feeding machine to form a web after carding;
[0023] (3) The carbon fiber mesh is coated with a phenolic resin through a coating and dipping process, and then dried to form an areal density of 30 g / cm 2 carbon fiber prepreg paper sheets;
[0024] (4) Taking the web-forming direction as the reference direction, set the density of the two ...
Example Embodiment
[0028] Example 2:
[0029] A preparation method of high-flux carbon paper for fuel cells, the preparation method comprises the following steps:
[0030] (1) The carbon fiber is cut with a chopper to a length of 20mm, and the chopped carbon fiber is opened by a double-roll fiber opening machine. The air is used as a dispersion medium, and a high-speed rotating roller is used to separate the fiber raw materials. Disperse into a single fiber state;
[0031] (2) the dispersed carbon fibers are introduced into the air-flow carding machine through the air-flow fiber feeding machine to form a web after carding;
[0032] (3) The carbon fiber mesh is coated with epoxy resin through the coating and dipping process, and then dried to form an areal density of 20g / cm 2 carbon fiber prepreg paper sheets;
[0033] (4) Taking the web-forming direction as the reference direction, set the density of 5 layers to 20g / m 2 The carbon fiber prepreg paper sheets are stacked layer by layer and the...
Example Embodiment
[0037] Example 3:
[0038] A preparation method of high-flux carbon paper for fuel cells, the preparation method comprises the following steps:
[0039] (1) The carbon fiber is cut by a chopper, and cut into lengths of 20mm and 40mm, respectively, and the chopped carbon fibers of different lengths are opened by a double-roll fiber opener. The air is used as the dispersion medium, and high-speed rotation is adopted. The rollers of different lengths respectively disperse the fiber raw materials into single fiber state;
[0040] (2) respectively introducing the dispersed carbon fibers into an air-flow carding machine through an air-flow fiber feeding machine to form a net after carding;
[0041] (3) Two carbon fiber webs with different chopped lengths were coated with vinyl resin by coating and dipping process, respectively, and then dried to form areal densities of 35 and 50 g / cm 2 carbon fiber prepreg paper sheets;
[0042] (4) Taking the web-forming direction as the referen...
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